[evlatests] Venus, Software time May 17

[Barry Clark]

> The positions in the labels corresponded to a minute or 2 before the
> start of the scan, in RA, and were offset by about 12" in DEC.
> details below.
> Scan      Source      Qual  Calcode Sub         Timerange          FrqID
>     1 VENUS1          : 0000           1  0/20:38:00 -   0/20:52:30     1
>     2 VENUS2          : 0000           1  0/20:52:50 -   0/21:01:20     1
> 
> Source summary
> Velocity type = '        '    Definition = '        '
> 
>    ID Source           Qual  Calcode RA(2000.0)     Dec(2000.0)  No. vis
>     1 VENUS1          : 0000         06:45:59.3443  25:43:52.384   11046
>     2 VENUS2          : 0000         06:46:02.3487  25:43:49.508    7898
> 
> ----------------------  JPL online ephemeris (UT)
>                     http://ssd.jpl.nasa.gov/horizons.cgi#top
> 
>   2007-May-17 20:36     06 45 59.3858 +25 43 40.985
>   2007-May-17 20:38     06 45 59.7835 +25 43 40.604
> 
>   2007-May-17 20:50     06 46 02.1692 +25 43 38.321
>   2007-May-17 20:52     06 46 02.5669 +25 43 37.940


The time difference doesn't bother me much.  Since this position is for
annotation only, I was rather sloppy.  I neglected the UTC-BDT difference,
which is 65 seconds, which accounts for most of it.  The 12" in declination
really bothers me, though.  I am unable to account for it.