... In virtually every situation that you would normally encounter in practice, unfiltered is likely to be better than a V filter. Those tend to run about ...
9502
Alan W Harris
harrisaw
Feb 8, 2003 3:37 am
... Any system (LSST, etc.) would use a filter of some sort, even if only a very broad-band one that optimizes S/N, cuts out extreme dispersion from ...
9501
Alain Maury
geocroiseur
Feb 8, 2003 2:18 am
... I disagree with this. Most wide field correctors used those days have atmospheric refraction correction (2dF, Megacam, and also VST and VISTA I believe). ...
9500
Greg Crawford
southern_obs
Feb 8, 2003 2:02 am
In this regard, is it worth amateurs experimenting with filtered observations, or are amateur apertures typically so small that this is a lost cause? If it...
9499
David Tholen
tholen@...
Feb 8, 2003 1:54 am
... It is possible to optimize your signal to noise ratio with a filter. To first order, asteroids look like the Sun, so their output at longer wavelengths...
9498
aah@...
ahenden2
Feb 8, 2003 1:45 am
One thing you gain with filters is better images since you are restricting the bandpass. This is often the reason for recommending filters, especially when...
9497
Alan W Harris
harrisaw
Feb 7, 2003 10:55 pm
... The answer is that if you build a 4 meter telescope, the "tough gang of astrophysicists" will stick filters in that, and you may as well build a 2 meter...
9496
brianw_mpo <Brian@...
brianw_mpo
Feb 7, 2003 10:22 pm
James, Thanks for the update. That space on the shelf next to Asteroids II will soon be filled. Clear Skies, Brian Warner...
9495
James McGaha
mcgaha@...
Feb 7, 2003 9:10 pm
I just spoke to University of Arizona Press about Asteroids III, the warehouse arrival date has slipped to 1 March. It will ship 3 March at earliest. (assuming...
9493
Edwin Goffin
edwin.goffin@...
Feb 7, 2003 11:09 am
Dear all, The discussion about the origin of the phrase "Vermin of the Skies" reminds me of another one (see subject) whose origin is equally mysterious to me....
9492
James McGaha
mcgaha@...
Feb 7, 2003 7:13 am
... What I love the most is the phrase : "Curiously, all these projects make use of the same data : short exposures in multiple filters." Why the heck do you...
9491
Bill J Gray
bill_j_gray
Feb 7, 2003 4:32 am
Steve, Ted, many thanks for the comments on this. I've grabbed and read Ted et. al.'s _Asteroids III_ article; between that and the on-list comments, I...
9490
Alain Maury
geocroiseur
Feb 7, 2003 4:18 am
... What I love the most is the phrase : "Curiously, all these projects make use of the same data : short exposures in multiple filters." Why the heck do you...
9489
Brian Skiff
brian.skiff@...
Feb 7, 2003 2:54 am
A conference paper appearing on the astro-ph server tonight might stir some speculation about faint asteroid discovery and follow-up: ...
9488
Steve Chesley
steve.chesley@...
Feb 7, 2003 1:53 am
Bill, There are roughly five means of mapping an orbital solution with uncertainty to a given time, each with a fairly well defined realm of utility. 1) Linear...
9487
E. L. G. Bowell
elgb@...
Feb 6, 2003 11:17 pm
According to Cunningham (Introduction to Asteroids, p. 10): "They came to be called vermin of the skies, probably from a German astronomer who called it [sic]...
9486
brianw_mpo <Brian@...
brianw_mpo
Feb 6, 2003 10:55 pm
Alain, ... I just meant you could upload Ted's article while waiting for amazon to send you a copy of the book. <<<< Understood. Actually, I'm thinking of...
9485
Alain Maury
geocroiseur
Feb 6, 2003 10:47 pm
... I will buy the book when it will become available. I have in the past gotten things from Napster and a few others, and have generally bought the CDs of the...
9484
Brian Warner
brianw_mpo
Feb 6, 2003 10:29 pm
David, ... FEB 03 <<< It now being three days past that deadline - WHERE'S MY BOOK?? <g> Clear Skies, Brian Warner Palmer Divide Observatory (IAU 716) 17995...
9483
brianw_mpo <Brian@...
brianw_mpo
Feb 6, 2003 10:26 pm
Alain, ... Why don't you download it (less than 100 Mo ) or just the section you want while it is available... <<<< As I understood, that site was really meant...
9482
David S. Dixon
dixon_lascruce
Feb 6, 2003 10:19 pm
FEB 03...
9481
Alain Maury
geocroiseur
Feb 6, 2003 10:17 pm
Why don't you download it (less than 100 Mo ) or just the section you want while it is available... http://www.lpi.usra.edu/books/AsteroidsIII/download.html ...
9480
brianw_mpo <Brian@...
brianw_mpo
Feb 6, 2003 10:09 pm
Ted, ... There will also be a description of statistical ranging and other recent orbit methods in Bowell et al. (in Asteroids III, U. Arizona Press, 2003). ...
9479
E. L. G. Bowell
elgb@...
Feb 6, 2003 7:43 pm
Bill: You are essentially describing a technique that has already been published under the name of statistical ranging. The primary reference is Virtanen et...
9478
James Roe
oaxaca732
Feb 6, 2003 3:53 pm
The web site for MPAPW 2003 is at http://real-web-services.com/mpapw.php (note the .php!). It contains the current status of the planning for the meeting but,...
9477
David S. Dixon
dixon_lascruce
Feb 6, 2003 3:01 pm
... Brian that was the point, things are well in hand now not because the surveys by themselves are able to do adequate follow up but because other system...
9476
Gary Hug
frogstar@...
Feb 6, 2003 7:08 am
"and omitting all but ... Maybe that is the point, we are hampered by day jobs, weather, lack of sizeable equipment, and usually not the best of sites but we...
9475
Brian Skiff
brian.skiff@...
Feb 6, 2003 5:38 am
... Unless I'm missing the point, I don't see what Dave seems to see. Sorting the list by number of object last-observed, and omitting all but the top...
9474
David S. Dixon
dixon_lascruce
Feb 6, 2003 4:53 am
... There are 479 NEO designations from 2002 that are not numbered 46 different sites made the last observation on these 479 NEOs as of 4 Feb. 2003. The...
9473
dleemoon2002 <moon...
dleemoon2002
Feb 5, 2003 4:25 pm
Does anybody have an email address that works for Robert Burns? I have sent several emails to him concerning the USNO A2 catalog, and they continually come...
