Bill, I have a question on Sky Safari 4 for the IPAD. Tried to find a place on the support page to ask this, but didn't have any luck.
I did a search for a double star, STF 2229, looking to see if a distance for it was shown. Stelladoppie, which I use for distances when they're listed doesn't show anything, and neither does Simbad (no parallax), which I use also. Sky Safari returned two entries for STF 2229, one showing a distance of 120pc (400 LY), and the other showing 15.4 pc (50.3 LY). There's also a discrepancy between the two entries on magnitudes for the primary and secondary. The first entry mentioned shows magnitudes of 8.14 and 10.30, while the second shows magnitudes of 9.65 and 10.30.
My main question is where does Sky Safari 4 pull that information from, and second,why are there two entries listed?