M 33 Pinwheel Galaxy Click on photo to return to 'Galaxies' Home
M33 Pinwheel Galaxy Triangulum Galaxy NGC 598
Dreyer description: Remarkable! Extremely bright, extremely large, round, very gradually brighter middle nucleus; = M33.
RA: 01h 33m 50.9s Dec: +30°39'37" (Epoch 2000)
Rise: 10:57 Transit: 18:57 Set: 03:01
M33 is a large, almost face-on spiral galaxy about 2.5 million light years distant in the northern constellation of Triangulum. It is a member of the 'Local Group' of galaxies, which is dominated by the Milky Way and M31. Like M31, M33 is approaching the Milky Way at a velocity of about 180km/s. Though the total light M33 galaxy is that of a star of magnitude 5.3, its large diameter makes it hard to see. However, despite its low surface brightness, this galaxy was among the first to be identified as a 'spiral nebula' by Lord Rosse in the 1840s. On shorter exposures, the nucleus appears very bright and almost stellar, like that in its southern cousin, NGC 300.
Photo Specifications: 2 Frame Mosaic
16" F/4.87 Newtonian , ST-8XE, CFW8 10/06/03 Temp. = -15 C
Processing: CCDops; DDP; MaxIm; align, color combine, crop, mosaic; PhotoImpact; final touchup.