NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC309
Basic Information
Location and Magnitude
Right Ascension: 0:56:42.6
Declination: -9:54:51
Constellation: CET
Visual Magnitude: 11.9
Historic Information
Discoverer: Tempel
Year of discovery: 1876
Discovery aperture: 11.0
Observational
Summary description: pB, pL, * 12ยท13 n
Sub-type: SBc
Steve's Notes
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NGC 309
24" (12/21/16): at 282x; fairly faint, moderately large, roundish, fairly low but uneven surface brightness, contains a brighter core that increases somewhat to the center. Hints of spiral arms in halo (slightly brighter arcs). A mag 12.5 star is 2' NNE. A mag 15 star is off the west side, 1.5' from center. IC 1602, the brightest member of AGC 117, lies 13' WSW. It appeared fairly faint, small, round, 20" diameter, slightly brighter nucleus.
17.5" (10/28/89): fairly faint, fairly large, slightly elongated ~E-W, weak concentration. A mag 12.5 star is off the NNE edge 2.1' from center. A mag 15 star is off the west edge.
8" (10/13/81): very faint, slightly elongated, even surface brightness.
At a redshift distance of ~260 million light years, NGC 309 is one of the largest and most luminous spiral galaxies known.