Happy Halloween

XEphem Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | XEphem Ephemeris Software Discussion | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: Re: Re: Re: Xephem Catalogs

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Steve VanDevender on December 21, 2000 19:16:34 UTC

Actually, the catalog lines in this version of hipparcos.edb do appear to contain an epoch time which is consistent with that documented in the full Hipparcos catalog data. An example line from hipparcos.edb:

HIP 1,f|S|F5,00:00:00.22,+01:05:20.4,9.10,1991.25

The last "1991.25" is exactly the epoch time for the Hipparcos catalog data.

Byte-by-byte Description of file: hip_main.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
. . .
18- 28 A11 --- RAhms Right ascension in h m s, ICRS (J1991.25) (H3)
30- 40 A11 --- DEdms Declination in deg ' ", ICRS (J1991.25) (H4)

Follow Ups:

Login to Post
Additional Information
Google
 
Web www.astronomy.net
DayNightLine
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2017 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