NGC6845 Galaxy in Telescopium

DATE 29 May 2014
TELESCOPE OPTICS 508 mm mirror f.4 . ccd Kodak KAF8300 3326 x 2504px 5.4 x 5.4µm
EXPOSURE binning 2: composite image, 12 min
IMAGE SIZE (ARCMIN) 27
LIGHT TRAVEL TIME (Derived Redshift. Millions Light Years) NGC6845A = 274
NGC6845B = 291
NGC6845C = 305
NGC6845D = 294
ATCA J2001.2-4659 = 287
MAGNITUDE NGC6845A = 14.28
NGC6845B = 14.86
NGC6845C = 16.3
NGC6845D = 15.5
ATCA J2001.2-4659 = na
POSITION RA-DEC J2000 NGC6845A = 20:00:58.40 -47:04:13.0
NGC6845B = 20:01:05.30 -47:03:33.0
NGC6845C = 20:00:56.80 -47:05:03.0
NGC6845D = 20:00:53.60 -47:05:43.0
ATCA J2001.2-4659 = 20:01:15.60 -46:59:30.0
POSITION ANGLE: 252
Rotation Velocity km/s NGC6845A -B-C-D = NA
Size (Light Years) NGC6845A = (RC3 D_0 (blue)) 204,140
NGC6845B = (ESO-LV "Quick Blue" IIa-O) 255,000 (this aeems anomalous and is more likely about 80000 diameter
NGC6845C = (ESO-LV "Quick Blue" IIa-O) 170,000
NGC6845D = (RC3 D_25; R_25 (blue) 75,600
DETAILS NGC6845A is a 2 armed barred spiral and the largest in the group. Supernova SN 2009DA was discovered in one of it's arms. NGC6845B is a barred spiral. NGC6845C is a spiral, almost edge-on as is NGC6845D

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6845