With a diameter of about 50,000 light years, the Triangulum galaxy is the third largest member of the Local Group of galaxies. It may be a gravitationally bound companion of the Andromeda Galaxy. Triangulum may be home to 40 billion stars, compared to 400 billion for the Milky Way, and 1 trillion (1000 billion) stars for Andromeda.
The disk of Triangulum has an estimated mass of (3-6) × 109 solar masses, while the gas component is about 3.2 × 109 solar masses. Thus the combined mass of all baryonic matter in the galaxy may be 1010 solar masses. The contribution of the dark matter component out to a radius of 55 kly (17 kpc) is equivalent to about 5 × 1010 solar masses.
Imaging telescopes or lenses: Takahashi FSQ 106ED
Mounts: Sky-Watcher NQ6
Guiding cameras: Meade DSI I
Software: Photoshop CS5.1, CCDSOFT v5.0, Pixixinsight 1.8
Filters: Baader RGBL, Baader Ha
Dates: Nov. 2, 2013
Integration: 10.0 hours
Author: Theodore Kavourinos
AstroPhotography of the day by SPONLI
29 March 2014