Abell 31
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.
| Emission nebula | |
|---|---|
| Planetary nebula | |
 As seen from Mount Lemmon Observatory | |
| Observation data: J2000 epoch | |
| Right ascension | 08h 54m 11.4s |
| Declination | +08° 54′ 30″ |
| Constellation | Cancer |
| Notable features | A very large and colorful PN |
| Designations | Sh2-290, PK 219.1+31.2, A 31, ARO 135 |
The central star of the planetary nebula is a white dwarf with a spectral type of DAO.[1]
References
- 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. arXiv:2109.12114. Bibcode:2021A&A...656A..51G. doi:10.1051/0004-6361/202141916. S2CID 237940344.
- http://www.astronomy-mall.com/Adventures.In.Deep.Space/abellcat.htm
- http://observing.skyhound.com/archives/feb/PNG_219.1+31.2.html
- https://web.archive.org/web/20140222225156/http://www.astrosurf.com/zoll/images/abell31
- http://www.annesastronomynews.com/photo-gallery-ii/nebulae-clouds/abell-31-by-adam-block/
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