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.
Magnitude:  6.2
RA: 01h 33m 50.9s  Dec: +30°39'37"  (Epoch 2000)
Rise: 10:57  Transit: 18:57  Set: 03:01
Size:70.3' x41.8'

SEDS description;
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

Filter
Exposure time
Number of exposures
Binning
Luminance
10 min
1
1x1
Red
10 min
1
1x1
Green
10 min
1
1x1
Blue
16 min
1
1x1
Other









Processing:   CCDops; DDP;  MaxIm; align, color combine, crop, mosaic; PhotoImpact; final touchup.