[vsnet-chat 5645] Re: [vsnet-id 707] V410 Cas position

[Brian Skiff <Brian.Skiff@lowell.edu>]

     USNO-B1.0 gives:  0 23 27.629  +61 46 29.24  (uncertainty 35,36 mas)
and zero motion.  The magnitudes reported from the various plates are:
mb=19.0 and mr=17.9 (POSS-I), mb=15.7 and mr=14.7 and mi=14.4 (POSS-II).

>>  Henden & Honeycutt (1995)  00:23:27.75  +61:46:27.7
>>  (VizieR extraction; 00:23:27.83  +61:46:27.4.  I don't know why differs.)

     This looks like a Besselian-to-Julian transformation has been applied
to the H&H positions.  If the originals were based on any flavor of the
GSC or USNO-x.x, then they are already very close to the J2000 system,
and thus the conversion has been inappropriately applied.

\Brian

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