19.05.2007 - Wechselgebiet

The Pinwheel Galaxy has several extremely luminous star-forming (H II) regions in the outer spiral arms, some sporting their own NGC numbers. It dominates a small group of galaxies, with some of its neighbors such as NGC 5474 showing wear and tear attributed to the tidal effects of M101. M101 itself is further noteworthy for its extensive and lopsided distribution of neutral hydrogen gas, and for showing evidence of gas falling into its disk at high speeds.

12,5" f/4 Astrograph CTA320, STL-11000M, LRGB - 90:40:30:40 min

Spiral Galaxy Type Sc
Size: 24' x 24'
Constellation: Ursa Major
Magnitude: 7.9
Distance: 24 mio. light years
RA: 14h 03m
Dec: +54° 20'