M 102 - Lenticular Galaxy in Draco

M 102 (also known as NGC 5866) lies approximately 44 million light years away in the constallation of Draco, the dragon. It is the largest member of a small cluster of galaxies - the M 102 group. It spans 35,000 light years, one-third that of the Milky Way.

M 102 was discovered by Peirre Mechain in 1781. Charles Messier included it in his catalog without confirming its coordinates. This raised the question of whether this object was a duplicate of M 101.

M 102 is categorized as a lenticular galaxy. These are an intermediate between an elliptical and spiral gaxay. They have a disc with a central bulge but no spiral arms.

 

Telescopes: Luminance: C11 Edge
Color: TS-Optics 10in. f/5 Newtonian
Cameras: Luminance: ST-8300
Color: Modified Canon 650D; ISO 1600
Mount: iOptron CEM60
Guiding: QHY-5L-II M on 60mm guide scope
Exposures:

Luminance: 30 @ 5 min.
Color: 18 @ 5 min.

Processing:

The luminance and color images were aligned in RegiStar. They were combined and adjusted in Photoshop. Topaz Detail and DeNoise were applied.

Notes:

Color images were shot from my backyard observatory in southeastern Minnesota on 4/19/2020. The luminance image was obtained in 2014.

   
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