NGC/IC Project Restoration Effort
(This is a very very beta version)
Location and Magnitude
Right Ascension: 9:32:11.8
Visual Magnitude: 15.0
Discoverer: Herschel W.
Year of discovery: 1784
Discovery aperture: 18.7
Summary description: vF, cL, R, psbM, r, nf of 2
NGC 2905 is the northeastern arm of NGC 2903. JH has several observations of
it in that position, as well as a sketch. The only slight mystery here is why
WH made NGC 2905 one of his first class nebulae, ranking it in brightness with
the central portion of NGC 2903 itself. I certainly never saw it that way in
telescopes ranging in size from 6 inches to 30 inches.
Fixing a position is a bit uncertain, too. There is a bright star cloud in
the arm that is well-represented in the sky surveys by its brightest knot.
However, that knot is somewhat to the east of the center of that part of the
galaxy sketched by JH and LdR. So, I have adopted the mean value of seven
knots from the 2MASS Point Source Catalog -- this position seems to be pretty
representative of the part of the galaxy seen by the earlier observers.
48" (4/18/15): NGC 2905 is the brightest of several luminous patches along the central bar. This irregular knot is located very near the north-northeast end of the central bar at the point where two spiral arms (extending west) emerge from the arm.
24" (2/22/14): just beyond the northeast end of the central bar is a fairly bright, irregular "knot" (NGC 2905) where the northern spiral arm attaches to the bar. This arm bends sharply to the west (clockwise), but only curves for ~1' and quickly fades.
17.5" (5/10/86): very large knot or arc at the NNE edge of a spiral arm in NGC 2903. Easily visible with averted vision.
13.1" (12/22/84): very faint knot or arc at NE edge of arm of NGC 2903.