Mayall's Object

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Mayall's Object
Hubble Interacting Galaxy Arp 148 (2008-04-24).jpg
A Hubble space telescope image of Mayall's Object
Observation data
Constellation Ursa Major
Right ascension 11h 03m 53.95s
Declination +40° 50′ 59.90″
Distance 450 million light years
Other designations
Arp 148, VV 032, MCG+07-23-019, APG 148
See also: Galaxy, List of galaxies

Mayall's Object (also classified under the Atlas of Peculiar Galaxies as Arp 148) is the result of two colliding galaxies located 500 million light years away within the constellation of Ursa Major. It was discovered by American astronomer Nicholas U. Mayall of the Lick Observatory on 13 March 1940, using the Crossley reflector.[1] When first discovered, Mayall's Object was described as a peculiar nebula, shaped like a question mark. Originally theorized to represent a galaxy reacting with the intergalactic medium,[2] it is now thought to represent the collision of two galaxies, resulting in a new object consisting of a ring-shaped galaxy with a tail emerging from it. It is thought that the collision between the two galaxies created a shockwave that initially drew matter into the center which then formed the ring.[3]

See also[edit]


  1. ^ Smith, R. T. ; The Radial Velocity of a Peculiar Nebula ; Publications of the Astronomical Society of the Pacific, Vol. 53, No. 313, p.187 Bibcode1941PASP...53..187S
  2. ^ Burbidge, E. Margaret The Strange Extragalactic Systems Mayall's Object and IC 883, Astrophysical Journal, vol. 140, p1619
  3. ^ HubbleSite: Cosmic Collisions Galore!, April 24, 2008, accessed August 10, 2008

Coordinates: Sky map 11h 03m 53.95s, +40° 50′ 59.90″