Due to the New England winter storm currently affecting the area, phone coverage at the AAVSO may be much reduced until Thursday. The staff is still available via email, and we suggest using that method to contact us if you need assistance.
Posted: September 29, 2013 - 11:34pm
How does VPhot determine object positions when doing astrometry - for example, when measuring separation and PA of 2 objects? Does it use UCAC-4?