NGC 4565 - The Needle Galaxy
Constellation - Coma Berenices
Distance - 31 million light years [more or less],
NGC 4565 is a member of the Coma I Galaxy Cloud and is considered to be the finest example of an edge-on galaxy. This galaxy is a spiral that is oriented nearly edge-on to our line of view. The dark line that lies through the center or core of the galaxy is dust and gas, contained within the galaxy, that blocks off the light from the core. Dust can also be seen in the spiral arms to either side of the core.
Radial velocity measurements show that NGC 4565 is receding away from us at an approximate speed of 1,282 kilometers per second. This galaxy's edge-on absolute magnitude is -20.3 with a luminosity of 11 billion suns [these figures would be much higher if this galaxy were seen face on].
Estimates of the size of NGC 4565 range from 90,000 light years [Burnhams] to 125,000 light years [The Night Sky Observers Guide].
February 24, 2006
Luminance: February 24, 2006 A sum of 18 six minute exposures.
RGB: March 18, 2003 Red - 28 min., Green - 16 min., Blue - 20 min.
Mt. Laguna, Cleveland National Forest, San Diego County, California
Optics - RC Optical Systems 10" Ritchey-Chretien at f/9
Mount - Astro-Physics 1200 GTO
Camera - SBIG ST-10XME