10 Sep
2013
10 Sep
'13
12:23 a.m.
On 09 Sep 2013, at 21:15, Siegfried Jachmann wrote:
what's the visual magnitude and what's the position tomorrow morning?
For Siegfried and anyone else who is interested go to: http://www.minorplanetcenter.org/iau/MPEph/MPEph.html Enter C/2012 S1 in the box at the top. Down where it asks for an observatory code, those in northern Utah can enter my code, 718. Those elsewhere should enter their longitude, latitude and altitude above sea level in meters. I just ran the numbers for this morning (Tuesday) and saw that at the start of nautical twilight the comet will be about 23 degrees above a flat, zero degree horizon. patrick