While using Sky Safari to track down SAO Numbers to add to my Double Star list, so I can use Gemini HC SAO catalog, I found that Sky Safari uses RA(2025.3)/Dec(2025.3). Searching for Beta Mon, I learned that it is SAO 133317, but it is also STF 919, which is in the Gemini HC Struve catalog. The RA/DEC coordinates in Sky Safari and Gem Struve don't match. What coordinate system is Gemini using?
Gem Struve Catalog? RA ?06:28:48, Dec? -07:02:00
Sky Safari? 2025.3? ? ? RA 06:30:03,? Dec? -07:03:00
?
Kevin
