from dateutil.parser import parse
from datetime import timedelta

t0 = parse('2013-01-13T21:14:34')
t = t0 + timedelta(seconds=(38*12427+8300-1)*0.03008434)

Out[5]: datetime.datetime(2013, 1, 14, 1, 15, 30, 277479)


python imgAvgfits.py ~/data/neo2013-01-13_X38_frames8300-9500.tif

python fits2azel.py ~/data/neo2013-01-13_X38_frames8300-9500_mean.fits -c 66.986350 -50.943861 -t 2013-01-14T01:45:30


