XEphem Forum Message | |
| Forums: |
Atm ·
Astrophotography ·
Blackholes ·
Blackholes2 ·
CCD ·
Celestron ·
Domes ·
Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem |
|
|
|
|
||||
|
|
||||||
Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place... The Space and Astronomy Agora |
| Re: Re: Re: Xephem Catalogs
Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To Posted by Steve VanDevender on December 20, 2000 20:40:01 UTC |
I'm wondering if the discrepancy with the Hipparcos catalog positions is related to precession correction not being applied to the Hipparcos objects? It looks like all the Hipparcos objects have an epoch of 1991.25, and a few arc-minutes of discrepancy would be reasonable for the precession between 1991 and today.
|
|
|
| Additional Information |
|---|
 |
| About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy |
|
Unless otherwise specified, web site content Copyright 1994-2023 John Huggins All Rights Reserved Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" are trademarks of John Huggins |