[Aavso-photometry] IL Aqr: Campaign Update 041014 (1 week to go!)

[Walt Cooney]

Michael,

A difference this small could be due to a lot of things including the catalog
you are using for your reference stars and the goodness of fit to those
reference stars.  You might try Herbert Raab's Astrometrica for astrometry.  It
is one of several programs used by folks doing minor planet astrometry. It's
shareware and very impressive.  Among other things, it will go out over the net
and get USNO-B1.0 reference stars.  Typical residuals with that catalog are
about 0.1 - 0.2 arc seconds.  When you select the target you want to do
astrometry of, it shows you the PSF of your target graphically too.  Way cool.

-Walt

-----Original Message-----
From: aavso-photometry-bounces at mira.aavso.org
[mailto:aavso-photometry-bounces at mira.aavso.org]On Behalf Of Michael
Koppelman
Sent: Thursday, October 14, 2004 2:48 PM
To: aaronp at onceler.org
Cc: aavso-photometry at aavso.org
Subject: Re: [Aavso-photometry] IL Aqr: Campaign Update 041014 (1 week
to go!)


Cool, I was actually in the ballpark! It seems that CCDSoft with TheSKY
actually did better astrometry than wcstools, which I use for my
sequences. I still haven't looked into why this is.

Cheers,
Michael Koppelman

On Oct 14, 2004, at 1:29 PM, Aaron Price wrote:

>             22:53:17.03  -14:15:52.5 (2000)
>

On Oct 9, 2004, at 10:58 AM, Michael Koppelman wrote:

> 22:53:17.1 -14:15:52.72



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