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Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away in the constellation Ursa Major. It has a D 25 isophotal diameter of 29.44 kiloparsecs (96,000 light-years ).
The M81 Group is a galaxy group in the constellations Ursa Major and Camelopardalis that includes the galaxies Messier 81 and Messier 82, as well as several other galaxies with high apparent brightnesses. [1] The approximate center of the group is located at a distance of 3.6 Mpc, making it one of the nearest groups to the Local Group. [1]
Winnecke 4 (also known as Messier 40 or WNC 4) is an optical double star consisting of two unrelated stars in a northerly zone of the sky, Ursa Major. The pair were discovered by Charles Messier in 1764 while he was searching for a nebula that had been reported in the area by Johannes Hevelius .
NGC 4605 is a dwarf barred spiral galaxy [6] in the constellation Ursa Major, located at a distance of 18.1 ± 0.3 megalight-years from the Milky Way. [5] Physically it is similar in size and in B-band absolute magnitude to the Large Magellanic Cloud. [6] It is a member of the M81 Galaxy Group, along with Messier 81 and Messier 101. [9]
Galaxy Type Distance from Earth Magnitude Group Membership Notes Diameter (ly) Millions of light-years Mpc M m - Milky Way: SBbc 0.0265 (to the galactic center) [2] 0.008 [2] −20.8 [1] n/a Local Group: Home galaxy of Earth. Barred spiral galaxy. 87,400 ly 1 Ursa Major III: 0.033 0.010 [3] +2.2 [3] 18.87 [3] [NB 1] Local Group: Satellite of ...
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M82 X-2 is an X-ray pulsar located in the galaxy Messier 82, approximately 12 million light-years from Earth. [2] It is exceptionally luminous, radiating energy equivalent to approximately ten million Suns. This object is part of a binary system: If the pulsar is of an average size, 1.4 M ☉, then its companion is at least 5.2 M ☉. [3]
Download as PDF; Printable version; In other projects ... Messier 81; Messier 82; N. NGC 2366; ... This page was last edited on 1 January 2014, ...