by Mauro Rorato » Wed Feb 01, 2017 4:47 am
http://themaurosky.wixsite.com/astrophotography/m37
Messier 37 (also known as M37 or NGC 2099) is the richest open cluster in the constellation Auriga , It is the brightest of three open clusters in Auriga.
M37 is located in the antipodal direction, opposite from the Galactic Center as seen from Earth.[4] Estimates of its age range from 347[1] million to 550[3] million years.
It has 1,500[2] times the mass of the Sun and contains over 500 identified stars,[3] with roughly 150 stars brighter than magnitude 12.5. M37 has at least a dozen red giants and its hottest surviving main sequence star is of stellar classification B9 V. The abundance of elements other than hydrogen and helium, what astronomers term metallicity, is similar to, if not slightly higher than, the abundance in the Sun.[1]
At its estimated distance of around 4,500 light-years (1,400 parsecs)[1] from Earth, the cluster's angular diameter of 24 arcminutes corresponds to a physical extent of about 20–25 ly (6.1–7.7 pc).
[img]https://static.wixstatic.com/media/d3e31f_574879b3810741b6b565e8f74be420dc~mv2.jpg/v1/fill/w_739,h_559,al_c,q_85/d3e31f_574879b3810741b6b565e8f74be420dc~mv2.jpg[/img]
[url]http://themaurosky.wixsite.com/astrophotography/m37[/url]
Messier 37 (also known as M37 or NGC 2099) is the richest open cluster in the constellation Auriga , It is the brightest of three open clusters in Auriga.
M37 is located in the antipodal direction, opposite from the Galactic Center as seen from Earth.[4] Estimates of its age range from 347[1] million to 550[3] million years.
It has 1,500[2] times the mass of the Sun and contains over 500 identified stars,[3] with roughly 150 stars brighter than magnitude 12.5. M37 has at least a dozen red giants and its hottest surviving main sequence star is of stellar classification B9 V. The abundance of elements other than hydrogen and helium, what astronomers term metallicity, is similar to, if not slightly higher than, the abundance in the Sun.[1]
At its estimated distance of around 4,500 light-years (1,400 parsecs)[1] from Earth, the cluster's angular diameter of 24 arcminutes corresponds to a physical extent of about 20–25 ly (6.1–7.7 pc).