NGC157 Galaxy in Cetus

DATE 28 Sept 2013
TELESCOPE OPTICS 508 mm mirror f.4 . effective f4.6 with paracorr2. ccd Kodak KAF8300 3326 x 2504px 5.4 x 5.4µm
EXPOSURE binning 1: composite image, 12 min
IMAGE SIZE (ARCMIN) 25.5
LIGHT TRAVEL TIME (Derived Redshift. Millions Light Years) 59
MAGNITUDE 11
POSITION RA-DEC J2000 00:34:46.70 -08:23:47.0
POSITION ANGLE: 40
Rotation Velocity km/s 100 at outer rim
Size (Light Years) 80,000 (POSS1 103a-O)
DETAILS Weakly barred spiral Galaxy. Rotation velocity seems almost Keplerian as it drops off from 230 to about 100 km/s

Rollov157er Image