> Hello Jari, I have the 4 buttons in the toolbar, and they work fine
with planetary images, but they don't work on DSS images.
> May be that this depends from the different image file type.
> Anyhow I agree with you: Bill will find a solution.
> Thank you

Sorry, forgot to tell about one small but important detail. You have
to "activate" the image by clicking on one of its corners.

Jari
In theory, there is no difference between theory and practice. But,
in practice, there is. --Jan L.A. van de Snepscheut
--------- More Great Science Quotes ----------
--- http://www.kolumbus.fi/jimenez/quotes/ ---

Hi all

I received Guide 8 today and installed it tonight without any problems.
Did the initial install, then copied the latest update to the Guide 8 folder and
proceeded to
  install both CD's to the hard disk. Took approx. 1 hour with most of this time
taken in
copying files from the CD to hard disk. Although I have obviously not tried all
features,
it certainly appears to work OK.

I did check one item which I noticed in Guide 7 some weeks ago with the same
apparent
  problem being in both versions. I have found that when checking the moon rise
and set times
  in Quick Info the times do not agree with the times in the Lunar Data Table.
for example for
     February 4 Quick Info                 5.05 rise 15.48 set
     February 4 Lunar Data Table     5.07 rise  15.46 set

Any suggestions?

Ivan Semmler
Perth
Western Australia




[Non-text portions of this message have been removed]

--- In guide-user@y..., "Ivan Semmler" <ivansemmler@b...> wrote:
> I have found that when checking the moon rise and set times
> in Quick Info the times do not agree with the times in the Lunar
> Data Table.
> for example for
> February 4 Quick Info 5.05 rise 15.48 set
> February 4 Lunar Data Table 5.07 rise 15.46 set
>
> Any suggestions?

Looks like Quick Info accounts for refraction but LDT doesn't. Not a
big deal, IMHO, but perhaps there should be a 'refraction on/off'
toggle in LDT just to make this obvious.

Jari
Are you boys in the space program, too? --Jim Lovell's mother to Neil
Armstrong and Buzz Aldrin, Apollo 13 movie
-------- More Great Science Quotes --------
-- http://www.kolumbus.fi/jimenez/quotes/ --

At 20:42 2002-02-04 +0800, Ivan Semmler wrote:

snip>>>
>I did check one item which I noticed in Guide 7 some weeks ago with the
same apparent
> problem being in both versions. I have found that when checking the moon
rise and set times
> in Quick Info the times do not agree with the times in the Lunar Data
Table.
>for example for
>    February 4 Quick Info                 5.05 rise 15.48 set
>    February 4 Lunar Data Table     5.07 rise  15.46 set
>
>Any suggestions?

Hi Ivan.

I asked Bill Gray about this a month or so ago and in his explanation he
included the fact that for rise and set times when we set our location data
the altitude should be above the local horizon and not above sea level.
The reasoning is that if you look out over the landscape from a mountain
top 300 meters above the surrounding landscape then the horizon seems
depressed and you will get an earlier moonrise than if you are on a flat
plain or standing on the seashore.  Try setting your location altitude to
zero and see how the two sets of data compare.  Mine were exactly the same
after I set the altitude to zero.  For other observations however like
astrometric work on minor planets and comets the MPC wants to know your
altitude above sea level.

Hi folks,

     Bob is right about this one.  To see the problem in somewhat
dramatic form,  go into "Display... Background" and turn on
"Show Ground" and "Horizon Objects".  Then go into "Settings...
Location" and,  in the "Altitude" box,  set a value of 8000 km.

     If you happened to be looking at the horizon at the time,  you'll
see it dip quite drastically,  as you are now looking down at the
earth from an immense height.  Click on objects,  and their
rise/set times are modified accordingly,  setting much later
and rising much earlier than they did before (or suddenly
becoming circumpolar... in fact,  at this height as seen from
my latitude of +44 degrees,  some far-southern stars become
"circumpolar";  the earth has an apparent angular diameter
of about 50 degrees,  and only those stars between declinations
-69 and -19 ever go behind the earth,  i.e.,  "rise" and "set".)

     So the lunar data table is the broken element here... something
for me to fix.

     Matt,  Charon will indeed work with Guide 8.  The only change
you will see is when doing Tycho-based astrometry.  Because the
base catalogue is now Tycho-2,  you will see "NET TYCHO-2"
in your MPC report files when using that catalog.  (And,  of course,
when doing Tycho-based astrometry,  you will suddenly see
_many_ more stars.)

     About contrast/adjustment of images (and of planets):  there are
both toolbar buttons and hotkeys for that job:

http://www.projectpluto.com/update7c.htm#contrast_hotkeys

     However,  they are supposed to affect either the images (if
you've clicked on one) or the planets (if you haven't),  but not
both at the same time.

     As Jari pointed out,  the intrinsic contrast of these images
isn't entirely constant over the sky;  the variations are usually
not too bad,  but are terrible on a few DSS plates.  I expect to
tackle that one by having Guide do a sort of histogram analysis
of the images as it decompresses them.

     Mark,  about the galaxy sizes:  the currently-uploaded 'guide8.zip'
fixes this one.  (There was a bit of confusion as to whether the
size given was a major axis or a _semimajor_ axis... just a little
factor of 2 to 1.)

-- Bill

-- Bill

In a message dated 2/3/02 4:37:25 PM Central Standard Time,
pluto@... writes:

>     Regarding use of Guide on older machines:  somebody else
>  may wish to chime in here.  I know Guide does get frequent
>  use on such machines;  people often upgrade to a new P-IV
>  screamer,  and take the old '486 or Pentium out to the
>  backyard observatory.

... "old Pentium."... sigh....
My Pentium-II is my NEW computer (which runs Guide 7 just fine as does the
older Pentium-1 laptop, an older IBM ThinkPad, I use in the field).

As for the even older ones,  I've been running Guide on various computers
through several upgrade versions  Guide ran well on my old 486 (an early 486
model with the largest hard drive of the time -- a whopping 160 MB <g>) for
routine charting and informational purposes; it choked up when attempting
heavily graphic activities such as zooming in close on Jupiter to see a
transit event or with some animations when I upgraded to Guide 6.  If you
have an even older one hanging around, I used to run Guide 5 in DOS mode on a
386 but I doubt it would be able to handle the bells and whistles in the
later versions of Guide.

Cheers,
Sandy Mc (eagerly awaiting my email to upgrade ... again ... to Version 8!)

SandyMc456@... (Sandra McNamara)
Stanford, IL     N 40d 26m   W 89d 13m

...
If you install Guide to the HD, then open your CD Drive, the tray makes a
great place to hold a cup of coffee/tea.

One of the benefits of Guide on a HD.

Chcheers

james

...


I even run a CCD camera on the laptop while using Guide (using an efficient
DOS program, not the manufcturers' software). I can have a text processor
open to edit my remarks and a small game to keep myself awake during long
exposures. I do not make coffee on the laptop, due to lack of power.



_________________________________________________________________
Send and receive Hotmail on your mobile device: http://mobile.msn.com

Hello Bill,

I have received today the Guide 8 CDs. After installed it, I unzip
the last guide8.zip from the web site and make a "full" harddisk
install of CD1. Also added some information from CD2 (double star
extra data).

Then, when I run Guide 8 without the CD1 I can GoTo double stars, but
the More Info windows shows nothing about WDS cataloge entry. If I
use the CD1 I get the data from WDS!. I have looked at the Guide8
directory and I have found a WDS subdir with a WDS2001.dat file of
5Mb... So perhaps something is broken.

If you want, I can look for any file you need in my setup...

--
Saludos,
Rafael Barberá

Rafael,
I talked with Bill about this problem earlier and I believe he has already
addressed it. If you download the latest Guide 8 upgrade from his sight, it will
fix it.

Regards,
PJ Anway


    >
    >Message:
    >   Date: Thu, 07 Feb 2002 15:59:17 -0000
    >   From: "rbarberac" <rbarbera@...>
    >Subject: Guide 8 and WDS
    >
    >Hello Bill,
    >
    >I have received today the Guide 8 CDs. After installed it, I unzip
    >the last guide8.zip from the web site and make a "full" harddisk
    >install of CD1. Also added some information from CD2 (double star
    >extra data).
    >
    >Then, when I run Guide 8 without the CD1 I can GoTo double stars, but
    >the More Info windows shows nothing about WDS cataloge entry. If I
    >use the CD1 I get the data from WDS!. I have looked at the Guide8
    >directory and I have found a WDS subdir with a WDS2001.dat file of
    >5Mb... So perhaps something is broken.
    >
    >If you want, I can look for any file you need in my setup...
    >
    >--
    >Saludos,
    >Rafael Barberá
    >
    >

I have controlled my skysensor 2000 pc through Guide (14 november 2001
version) and the LX200 protocol under win 98 witout any problems. I
recently bought a new PC with win xp installed, trying to control the
skysensor through Guide as before resulted in a error message when
clicking "slew guide". I then tried to control the skysensor with "The
Sky" software, everything worked OK.

Have anybody else experienced this and is there a fix?

Clear skies!
Stig


[Non-text portions of this message have been removed]

Wasn't this fixed in the December 11th version?






"Stig Foss" <stigfoss@...> on 02/08/2002 02:15:22 PM

Please respond to guide-user@yahoogroups.com

To:    <guide-user@yahoogroups.com>
cc:

Subject:    [guide-user] Guide and telescope control under win XP


I have controlled my skysensor 2000 pc through Guide (14 november 2001
version) and the LX200 protocol under win 98 witout any problems. I
recently bought a new PC with win xp installed, trying to control the
skysensor through Guide as before resulted in a error message when
clicking "slew guide". I then tried to control the skysensor with "The
Sky" software, everything worked OK.

Have anybody else experienced this and is there a fix?

Clear skies!
Stig


[Non-text portions of this message have been removed]


To unsubscribe from this group, send an empty email to:
guide-user-unsubscribe@egroups.com

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

Rafael,
I talked with Bill about this problem earlier and I believe he has
already addressed it. If you download the latest Guide 8 upgrade from
his site, it will fix it.

Regards,
PJ Anway






--- In guide-user@y..., "rbarberac" <rbarbera@p...> wrote:
> Hello Bill,
>
> I have received today the Guide 8 CDs. After installed it, I unzip
> the last guide8.zip from the web site and make a "full" harddisk
> install of CD1. Also added some information from CD2 (double star
> extra data).
>
> Then, when I run Guide 8 without the CD1 I can GoTo double stars,
but
> the More Info windows shows nothing about WDS cataloge entry. If I
> use the CD1 I get the data from WDS!. I have looked at the Guide8
> directory and I have found a WDS subdir with a WDS2001.dat file of
> 5Mb... So perhaps something is broken.
>
> If you want, I can look for any file you need in my setup...
>
> --
> Saludos,
> Rafael Barberá

Hi folks,

     I've just posted a new GUIDE8.ZIP,  again about 460 KBytes,  at

http://www.projectpluto.com/guide8.zip

     with the following small changes:

     Jari Suomela pointed out that if you install everything to the hard
drive,  some of the comments for GSC stars don't get shown unless the
CD is in the hard drive.  Rafael Barbera pointed out that in the same
circumstances,  WDS-2001 comments don't show up.  As with other "it
only works with the CD in the drive" problems,  the trouble was that
files didn't get copied over.  The update repairs both errors.  But
to persuade Guide to copy those files,  you'll have to go into "Extras",
"Install to Hard Drive",  and toggle something.  You can toggle it
back later,  but Guide won't even attempt to install anything unless
it's persuaded that something has changed.

     This WDS problem is not the same one that Pat Anway found a few
days back.  I'd repaired that error,  which involved an errant
backslash in my code.  (One of the early probes to Venus supposedly
was lost due to a misplaced semicolon in the code... at least this
misplaced byte was not so disastrous.)

     Julian Parks and Sam Herchak ("independent co-discoverers") pointed
out that the side RA/dec labels always appear on the left and bottom
margins on-screen,  no matter how you set check-boxes in "Settings...
Margins Menu".  I vaguely remember that,  when I added this feature
a few years ago,  I had a really good reason for making it work only
on printouts.  But I no longer remember that reason,  so I modified
the code so that the check-boxes adjust side labels both on the screen
and on printouts.

     Incidentally,  this file _should_ still work with a Guide 7 CD;
you just won't get assorted features that require the Guide 8 disks.
Be aware that my focus has been on getting this to work with Guide 8,
and it's possible that some things no longer function when used with
a Guide 7 disk.

-- Bill

Grant Blair,  thanks for the reminder.  You're right,  I _did_ fix
scope control on XP;  the last few months have been chaotic enough
that I'd forgotten exactly what I did.  The current GUIDE7.ZIP will
fix the problem (for that matter,  use of GUIDE8.ZIP would do it.)
Here's the post I originally made on the subject on 3 December 2001.

      ---------- Clip --------

      This problem has cropped up from time to time over the last half year
or so.  By coincidence,  I found a solution a few days ago.

      It mostly affected Win2000 systems,  and more recently,  XP
systems.  As best I could tell,  Guide would send data,  but couldn't get
any data back from the scope.  So (for LX-200 control) "Slew Scope" would
send data to the scope and the scope would move,  but Guide never got an
acknowledgment message from the scope.  "Slew Guide" wouldn't work at
all,  since it requires getting the RA/dec from the telescope.

      This had me baffled until I got a message from Eric Vesting,  who
distributes Guide in Germany.  A friend of his provided a little code
snippet;  comparison to my code revealed a segment labelled "this is
different in NT/2000/XP from the 95/98/ME version."  I changed about five
lines of my code to match the example,  verified that it worked on my WinME
box,  and sent it off to a gent who verified that it fixed the problems
he'd run into in Win2000.
      ---------- Clip --------

When Guide is running there are the usual menu items - file, go-to etc. -
which are described in the manual.  There are also some small icons along the
top that I recall being able to setup some time ago, but I cannot find any
reference to them in the manual.  Is it possible to add 'reminders' to them
that become visible when the mouse cursor is moved over each one?  Is there a
reference somewhere to customising these icons?

regards

Lawrence Harris

Hi Lawrence,

     The manual doesn't mention the toolbar because I added that after
Guide 7 started shipping.  However,  if you take a look at "Settings...
Toolbar",  you should have no problem in turning buttons on or off and
in switching from the (default) small buttons to the larger buttons.

     To get toolbar tips,  you'll need to use the current software;
the tips will then automagically appear on the application title bar,
both for toolbar buttons and for legend items.  That is,  move the
cursor over the time shown in the legend,  and the application title
bar will have a blurb telling you what clicking in that area will do.

     For gory details,  including how you can reset the actions that
result from clicking in the legend area:

http://www.projectpluto.com/update7.htm#toolbar_tips
http://www.projectpluto.com/update7.htm#legend_tz

-- Bill

May yet be some problems. When you start this version it says Guide 7 on
the status line and with no further information in the About box it is now
difficult to tell which patch has been applied.

At 19:53 08/02/2002 -0500, you wrote:
>Hi folks,
>
>     I've just posted a new GUIDE8.ZIP,  again about 460 KBytes,  at
>
>http://www.projectpluto.com/guide8.zip
>
>     with the following small changes:
>
>     Jari Suomela pointed out that if you install everything to the hard
>drive,  some of the comments for GSC stars don't get shown unless the
>CD is in the hard drive.  Rafael Barbera pointed out that in the same
>circumstances,  WDS-2001 comments don't show up.  As with other "it
>only works with the CD in the drive" problems,  the trouble was that
>files didn't get copied over.  The update repairs both errors.  But
>to persuade Guide to copy those files,  you'll have to go into "Extras",
>"Install to Hard Drive",  and toggle something.  You can toggle it
>back later,  but Guide won't even attempt to install anything unless
>it's persuaded that something has changed.
>
>     This WDS problem is not the same one that Pat Anway found a few
>days back.  I'd repaired that error,  which involved an errant
>backslash in my code.  (One of the early probes to Venus supposedly
>was lost due to a misplaced semicolon in the code... at least this
>misplaced byte was not so disastrous.)
>
>     Julian Parks and Sam Herchak ("independent co-discoverers") pointed
>out that the side RA/dec labels always appear on the left and bottom
>margins on-screen,  no matter how you set check-boxes in "Settings...
>Margins Menu".  I vaguely remember that,  when I added this feature
>a few years ago,  I had a really good reason for making it work only
>on printouts.  But I no longer remember that reason,  so I modified
>the code so that the check-boxes adjust side labels both on the screen
>and on printouts.
>
>     Incidentally,  this file _should_ still work with a Guide 7 CD;
>you just won't get assorted features that require the Guide 8 disks.
>Be aware that my focus has been on getting this to work with Guide 8,
>and it's possible that some things no longer function when used with
>a Guide 7 disk.
>
>-- Bill
>
>
>
>To unsubscribe from this group, send an empty email to:
>guide-user-unsubscribe@egroups.com
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

Lawrence -

Tooltips appear in the Windows active title bar when you mouseOver an icon.

cheers
James




When Guide is running there are the usual menu items - file, go-to etc. -
which are described in the manual.  There are also some small icons along
the
top that I recall being able to setup some time ago, but I cannot find any
reference to them in the manual.  Is it possible to add 'reminders' to them
that become visible when the mouse cursor is moved over each one?  Is there
a
reference somewhere to customising these icons?

regards

Lawrence Harris


To unsubscribe from this group, send an empty email to:
guide-user-unsubscribe@egroups.com

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/




_________________________________________________________________
MSN Photos is the easiest way to share and print your photos:
http://photos.msn.com/support/worldwide.aspx

Bill,

On the topic of tool tips, I have been thinking from a 'usability'
perspective that they would be better off located next to the actual icon,
in a similar vein to the <img... alt..> element in HTML.

One thing I've always tried to avoid when building websites is to have
navigation information away from the actual hyperlink. Someone once coined
it "Mystery Meat" navigation... you'll never know what you are going to get.
If you have ever seen sites which use the browser window.status bar to
display nav information then you'll know what I mean.

Looking towards the application bar is not the usual reaction of a user when
looking for nav info.

As an example , Eudora uses tooltips over it's icons when the mouse rolls
over them.


best regards

James Ellis



Hi Lawrence,

      The manual doesn't mention the toolbar because I added that after
Guide 7 started shipping.  However,  if you take a look at "Settings...
Toolbar",  you should have no problem in turning buttons on or off and
in switching from the (default) small buttons to the larger buttons.

      To get toolbar tips,  you'll need to use the current software;
the tips will then automagically appear on the application title bar,
both for toolbar buttons and for legend items.  That is,  move the
cursor over the time shown in the legend,  and the application title
bar will have a blurb telling you what clicking in that area will do.

      For gory details,  including how you can reset the actions that
result from clicking in the legend area:

http://www.projectpluto.com/update7.htm#toolbar_tips
http://www.projectpluto.com/update7.htm#legend_tz

-- Bill



_________________________________________________________________
Send and receive Hotmail on your mobile device: http://mobile.msn.com

Bonjour à tous,

Comment faut-il faire pour acquérir les CD de guide 8 ?

Merci d'avance.
Jean-Paul VERROT


[Non-text portions of this message have been removed]

Bonjour,


Je te conseille de contacter Bill Gray (pluto@...) en donnant
ton adresse postale et ton No de carte bleue. Pour ma part, je l'ai eu en
qques jours et il marche tres bien.


Cordialement,
Olivier


-----Original Message-----
From: jp-verrot [SMTP:jp-verrot@...]
Sent: Sunday, February 10, 2002 12:59 PM
To: guide-user@yahoogroups.com
Subject: [guide-user] guide 8

[>]  Bonjour a tous,

Comment faut-il faire pour acquerir les CD de guide 8 ?

Merci d'avance.
Jean-Paul VERROT


[Non-text portions of this message have been removed]



To unsubscribe from this group, send an empty email to:
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end

Bonjour,

  Merci pour ta réponse rapide !

Jean¨Paul
----- Message d'origine -----
De : "Olivier Thizy" <thizy@...>
À : <guide-user@yahoogroups.com>
Envoyé : dimanche 10 février 2002 13:44
Objet : RE: [guide-user] guide 8


> Bonjour,
>
>
> Je te conseille de contacter Bill Gray (pluto@...) en donnant
> ton adresse postale et ton No de carte bleue. Pour ma part, je l'ai eu en
> qques jours et il marche tres bien.
>
>
> Cordialement,
> Olivier
>
>
> -----Original Message-----
> From: jp-verrot [SMTP:jp-verrot@...]
> Sent: Sunday, February 10, 2002 12:59 PM
> To: guide-user@yahoogroups.com
> Subject: [guide-user] guide 8
>
> [>]  Bonjour a tous,
>
> Comment faut-il faire pour acquerir les CD de guide 8 ?
>
> Merci d'avance.
> Jean-Paul VERROT
>
>
> [Non-text portions of this message have been removed]
>
>
>
> To unsubscribe from this group, send an empty email to:
> guide-user-unsubscribe@egroups.com
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>


----------------------------------------------------------------------------
----


>
>
>
> To unsubscribe from this group, send an empty email to:
> guide-user-unsubscribe@egroups.com
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

Below is a posting heading that Nortons detected as containing a
possible unidentified virus and quarantined. It could not repair it so I
deleted it. Ha anyone else detected it?

Kevin Cooper..

Subject:
           RE: [guide-user] guide 8
      Date:
           Sun, 10 Feb 2002 14:44:39 +0100
      From:
           Olivier Thizy <thizy@...>
  Reply-To:
           guide-user@yahoogroups.com
        To:
           "'guide-user@yahoogroups.com'" <guide-user@yahoogroups.com>




This message contained items that could not be scanned for viruses.
The contents of the message were removed by Norton AntiVirus.

There is always a nostalgic twinkle in my eye when I see references to IRAS.
I was shift leader of one of the three teams controlling the satellite. A
wonderful international project.

Lawrence Harris



>   From: Bill J Gray <pluto@...>
>Subject: Diameters

>    The ASTORB documentation states that the data are "IRAS
>diameter[s], km (blank if unknown; taken from the Small Bodies
Node of the Planetary Data System."  Searching a bit dug up
the following table:

http://pdssbn.astro.umd.edu/SBNast/archive/IMPS/diamalb.tab

   which appears to be the one ASTORB uses.  I assume the
folks at Sky & Tel dug out something more recent (IRAS was
mid-1980s vintage),  but dunno what that might be.

-- Bill

--- In guide-user@y..., Bill J Gray <pluto@p...> wrote:
>     ...
>     About asteroids:  one problem I ran into with Guide 8 is
> that there are about five times as many asteroids as there
> were for the first Guide 7 disks. I had to do several things
> to accommodate this.  ...
> I still had to reduce the range of dates supplied to run from about
> 1960 to 2023.
>
>     ... In the meantime,  we are stuck with a shorter
> range of dates than I would like.  (The data in the 1950s was
> especially useful when dealing with DSS images from that era.
> You could zoom in on such an image,  spot an asteroid trail,
> and usually identify it pretty quickly.) ...
>
> -- Bill

I tried the experiment of  using the Guide 7 asteroid element files,
which go back to 1941, with Guide 8. It worked, the positional
differences between the program versions being less than 0.02". All I
did was copy the folders 2429, 2430 through 2436 from
<drive_7>\asteroid\asteroid\ to <drive_8>\asteroid\asteroid\ where
<drive_n> is the path to the Guide n data files.

This presumes, of course, that you've installed the Guide asteroid
data to your hard drive. Also, the Guide 7 data files are limited to
the first 9000 or so asteroids.

Ross Shuart

I'd not thought about this,  but Ross is correct;  the scheme he
suggests ought to work quite well.  Guide 8 covers (between the
two disks) elements back to JD 2437000.5 (February 1960);  you
could copy over Guide 7 elements covering dates between then
and JD 2439800.5 (June 1940).

     I expect that my first step in dealing with this problem will be
to write a program that can read in an MPCORB file and do the
numerical integration to any desired date (said date limited only
by your patience;  it may take a while to integrate 150,000+
orbits over a few centuries... fortunately,  for most uses,  you
would only need integrate over time spans of perhaps a few
months,  to bring MPCORB to a "current-day" epoch.)

-- Bill

--- In guide-user@y..., Bill J Gray <pluto@p...> wrote:
>     ...
>     I expect that my first step in dealing with this problem will be
> to write a program that can read in an MPCORB file and do the
> numerical integration to any desired date (said date limited only
> by your patience;  it may take a while to integrate 150,000+
> orbits over a few centuries... fortunately,  for most uses,  you
> would only need integrate over time spans of perhaps a few
> months,  to bring MPCORB to a "current-day" epoch.)
>
> -- Bill

It would be nice to let the user specify a selection of asteroids to
integrate, then save date sorted elements into the file structure.
Why integrate thousands of asteroids if only a few are of interest?
Having done the integraion, converting the state vectors into
osculating elements and saving them to disk periodically would add
little extra computational effort.  Selection of perturbing bodies
could considerably affect the integration time, too.

Examples might be to reconstruct the discovery cicumstances of Ceres
or to determine if some of the brightest asteroids might account for
missing Flamsteed stars.

Ross

Hi everyone,

since we're working on a small exhibit featuring the "Small objects in the
solar system", I'd like to make some images showing the orbits of all the
Jupiter-moons, or the orbits of "all" the asteroids, or.... Mostly a view
from above the central object, although a more "3D-like" viewpoint could be
nice too).

Of course, there is a way to do this in Guide (take a viewpoint from way
above Jupiter, click on a moon, add a trail just long enough for one orbit,
and do this all over 28 moons ... And then I'm not talking about hundreds
or thousands of asteroids ;-)
So not the most economic way to do this...

But on Bill's website if found this: http://www.projectpluto.com/jsats.htm
(with links to http://www.projectpluto.com/pro_jsat.gif and
http://www.projectpluto.com/ret_jsat.gif)

Is there a way to make this kind of images more automated (have I missed
something?), or does someone knows about other software doing this
(accuracy is not that important, although of course the different
inclinations and eccentricities should be obvious).

TIA,

Philippe


--------------------------------------------------------------------------
Philippe Mollet
Tel.: 02/269.12.80
Fax.: 02/269.10.75
E-mail: philippe@... (job)
__
/ /
| / | Volkssterrenwacht MIRA v.z.w./
|////| MIRA Public Observatory
Grimbergen, Belgium
http://www.mira.be/
http://users.pandora.be/mollet.cornelis/telescoopbouw/index.html
Abonneren op onze gratis nieuwsbrief? Mail naar: nieuwsbrief@...
--------------------------------------------------------------------------

Hi Philippe,

     I rendered those images,  and similar ones for the Saturnian and
Uranian systems (see http://www.projectpluto.com/ssats.htm and
http://www.projectpluto.com/usats.htm ) with a little program I
wrote for the purpose.  It is heavily user-abusive,  because I wasn't
thinking along the lines of distributing it;  and if you attempt to
display more than about a dozen objects,  the result is too
"spaghetti-like" to be very useful.

     I went to the effort of doing it because I thought it possible that
I could see some pattern to the orbits of these objects.  (The
pattern for Jupiter is very clear:  there is one inner group of
prograde objects,  all with similar inclinations and periods,
and one group of outer objects,  again with similar inclinations
and periods.  The groups for Saturn and Uranus are less
obvious,  but are there.  None of this is at all obvious from
the orbit graphs;  you have to look at the tables of orbital
elements to see what is going on.)

     So I didn't learn anything very useful from the program,  but
got some "pretty pictures" of the orbits to show on the Web
site.

     If you can find another program to show orbits (I don't know
of one,  but surely _someone_ must have done this!),  I'd
advise using it.  Otherwise,  let me know,  and I'll post mine,
and you can give it a try... I only suggest you look elsewhere
because mine was a quick,  dirty,  not-very-good effort.

-- Bill

SS2000 isn't one of the scope control options -- is there a way of using
it with Guide?
--
Best,
Stephen
<http://www.astunit.com>