Media Relations Caltech Pasadena, California MEDIA CONTACT: Scott Kardel, Palomar Public Affairs Director (760) 742-2111 wsk@... July 29, 2003 ...
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Robert Stephens
rstephens@...
Aug 1, 2003 9:55 pm
Greetings all! Forgive the somewhat off topic nature of this post but we are launching a new group called the Society for Astronomical Sciences (SAS),...
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Brian Warner
brianw_mpo
Aug 2, 2003 1:49 am
Here's two astrometry reports. The first using USNO A2.0. The second using the UCAC 2.0. If the skies would only clear!!!! ...
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Peter Birtwhistle
pbirtwhistle
Aug 2, 2003 11:23 am
... Andrew, I sent off some more positions of 2003 OX7 from early this morning to the MPC today, so hopefully the orbit will get updated soon, regards, Peter ...
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gallardo@...
Aug 2, 2003 7:06 pm
Hello Thanks to the observations of J95 the elements changed a little but the resulting trajectory is very similar to the previous one. The encounters with ...
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John Cody
SFJCody
Aug 2, 2003 10:59 pm
I've just seen the new MPECs and I noticed this: 2001 HZ58 Epoch 2003 June 10.0 TT = JDT 2452800.5 MPC M 103.48707 (2000.0)...
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Alan W Harris
harrisaw
Aug 3, 2003 12:05 am
... ******************************************************************* Alan W. Harris Senior Research Scientist Space Science Institute 4603 Orange Knoll Ave....
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Tony Beresford
dberesford@...
Aug 3, 2003 12:12 am
... The predicted magnitude in the ephemeris ( around 18) is so much brighter than the one reported in the observations listed in P04, I think an error has...
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Lawrence
ldjhandm
Aug 3, 2003 3:21 am
We are probably going to have a few clear nights in UK. I can image down to ~mag 17.5 or so with my 12" LX200 and MX916. I would like to know whether there...
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Glen Deen
glenwdeen
Aug 3, 2003 3:23 am
I searched the MPML archive for "numerical integration" without success. I implemented the 5-th order Runge-Kutta algorithm in Dan Boulet's Methods of Orbit...
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Brian Warner
brianw_mpo
Aug 3, 2003 4:18 am
If you're interested in lightcurve work, there's the campaign for 37655 Illapa going on right now; see http://www.uai.it/sez_ast/37655/37655.htm For a more...
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Andrea Pelloni
andrea_pelloni
Aug 3, 2003 11:46 am
There has been a correction to these values, given in the following MPEC 2003-P05 It was a mistake! By Andrea ... Andrea Pelloni ARA- Associazione Romana...
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Mike Kretlow
t1tmao
Aug 3, 2003 1:05 pm
Hi Glen, many years ago I tested several algorithms for thier suitability for the integration of minor planets and comets. There are many procedures and it...
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Tony Beresford
dberesford@...
Aug 3, 2003 1:06 pm
Bill Gray hasnt had any IMP 8 observations since june 16. As he is the only one calculating an orbit for this nuisance could somebody make an observation in...
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Pasquale Tricarico
tricaric1976
Aug 3, 2003 1:39 pm
Hi Glen, There are many variable-stepsize algorithms, like the Bulirsch-Stoer or the Everhart's RADAU, and you can find documentation on the net. I can...
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David A. Cornell
corneld2003
Aug 3, 2003 1:51 pm
Regarding Glen Deen's inquiry about algorithms for numerical integration, I recommend that he inspect Bill Gray's program Find_Orb on his website, at...
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Bill J Gray
bill_j_gray
Aug 3, 2003 3:02 pm
Hi Glen, A while back, I wrote a little utility to read the MPC's 'mpcorb.dat' file(s) and integrate them to any desired epoch. The source code and comments...
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Bill J Gray
bill_j_gray
Aug 3, 2003 3:13 pm
Tony Beresford wrote: "...Bill Gray hasnt had any IMP 8 observations since june 16. As he is the only one calculating an orbit for this nuisance could somebody...
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Cubrovic Mihailo
disketayu
Aug 3, 2003 5:31 pm
I'm rather inexperienced in this field, but as far as I've seen Runge-Kutta integrators are not very convinient for orbital integration, even if they have...
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Bill Owen
wmo@...
Aug 3, 2003 10:02 pm
I received my copy of UCAC2 in the mail this past week, and I too can hardly wait to start using it. It will certainly make my life a lot easier! -- Bill Owen...
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Bill J Gray
bill_j_gray
Aug 3, 2003 11:08 pm
Hi Mihailo, You wrote: "... as far as I've seen Runge-Kutta integrators are not very convinient for orbital integration, even if they have adaptive step and...
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Cubrovic Mihailo
disketayu
Aug 4, 2003 9:48 am
Hi Bill, ... Well, RK-based methods are quite easy to program and can be made rather precise but as you go further with precision (i. e. reducing the stepsize)...
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RA Kowalski
mpmlowner
Aug 4, 2003 1:33 pm
(37655) Illapa is rapidly brightening and now is the time to start making your photometric observations. The close encounter with this Potentially Hazardous ...
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RA Kowalski
mpmlowner
Aug 4, 2003 1:45 pm
While browsing through some very old issues of Astronomy magazine during my recent run at RHO, I came across a letter from a Harold Schenk which asked ...
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Lenka Sarounova
qlenka
Aug 4, 2003 1:49 pm
Dear all, I have observed (37655) during 3 nights and it seems the amplitude of its light changes is rather small and lightcurve shape probably complicated. ...
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Jim Carlson
sunspots625
Aug 4, 2003 3:39 pm
I've often wondered whether some of the comets spotted by SOHO aren't actually asteroids. Jim Carlson ... From: "RA Kowalski" <bitnik@...> To: "MPML"...
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Michel Festou
festou@...
Aug 4, 2003 4:16 pm
One should be clear about this: asteroids and comets are two different kinds of solar system objects. There is no link between them and there is consequently...
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Alan W Harris
harrisaw
Aug 4, 2003 6:39 pm
... I have to differ a bit from Michel Festou's response. While there are strong dynamical arguments to be applied, one never knows the "truth" without...
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Ron Baalke
baalke@...
Aug 4, 2003 7:40 pm
ESA Science News http://sci.esa.int 01 Aug 2003 Ulysses sees Galactic Dust on the rise Since early 1992 Ulysses has been monitoring the stream of stardust...
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Paul G. Comba
comba@...
Aug 4, 2003 8:46 pm
... In 1993 I got in touch with Harald Schenk in connection with his request for observations of 899 Jocaste, and on October 13, 15 and 20 I took photographic...
