Astronomy:Abell 31

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Short description: Astronomical object

Abell 31
Emission nebula
Planetary nebula
Observation data: J2000 epoch
Right ascension 08h 54m 11.4s
Declination+08° 54′ 30″
Notable featuresA very large and colorful PN
DesignationsSh2-290, PK 219.1+31.2, A 31, ARO 135
See also: Lists of nebulae

Abell 31 is an ancient planetary nebula in the constellation of Cancer. It is estimated to be about 2,000 light years away. Although it is one of the largest planetary nebulae in the sky, it is not very bright.

The central star of the planetary nebula is a white dwarf with a spectral type of DAO.[1]


  1. González-Santamaría, I.; Manteiga, M.; Manchado, A.; Ulla, A.; Dafonte, C.; López Varela, P. (2021). "Planetary nebulae in Gaia EDR3: Central star identification, properties, and binarity". Astronomy & Astrophysics 656: A51. doi:10.1051/0004-6361/202141916. Bibcode2021A&A...656A..51G. 

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