NGC 5477

Coordinates: Sky map 14h 05m 33.1s, +54° 27′ 40″

NGC 5477
An archetypal dwarf galaxy
Dwarf galaxy NGC 5477 taken by the Hubble Space Telescope.
Observation data (J2000 epoch)
ConstellationUrsa Major[1]
Right ascension 14h 05m 33.1s[2]
Declination+54° 27′ 40″[2]
Helio radial velocity317 km/s[2]
Distance20 million light years[1]
Apparent magnitude (V)14.01[2]
Other designations
MCG+09-23-034, VV 561, [MI94] Sm 95,

DDO 186, SPB 245, Z 272-25 [VDD93] 194, IRAS F14038+5441, TC 305, Z 1403.8+5442, KUG 1403+546, UGC 9018, [HBS84] 74,

LEDA 50262, UZC J140532.8+542739, [M98c] 140347.9+544200

NGC 5477 is a dwarf galaxy located in the constellation of Ursa Major, 20 million light years away from Earth.


  1. ^ a b "An archetypal dwarf galaxy". Picture of the Week. ESA/Hubble. Retrieved 11 January 2013.
  2. ^ a b c d e "Search Results for 5477". Astronomical Database. SIMBAD. Retrieved 11 January 2013.
M101 Group

The M101 Group is a loose group of galaxies located in Ursa Major. The group is named after the brightest galaxy in the group, the Pinwheel Galaxy (M101). Most of the other members of the group are companions of the Pinwheel Galaxy. The group itself is one of many located within the Virgo Supercluster (i.e. the Local Supercluster).

Pinwheel Galaxy

The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on spiral galaxy distanced 21 million light-years (six megaparsecs) away from Earth in the constellation Ursa Major. Discovered by Pierre Méchain on March 27, 1781, it was communicated to Charles Messier who verified its position for inclusion in the Messier Catalogue as one of its final entries.

On February 28, 2006, NASA and the European Space Agency released a very detailed image of the Pinwheel Galaxy, which was the largest and most detailed image of a galaxy by Hubble Space Telescope at the time. The image was composed of 51 individual exposures, plus some extra ground-based photos.

On August 24, 2011, a Type Ia supernova, SN 2011fe, was discovered in M101.


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