Abell 13 (known as the Onion ring nebula)[2] is a flarge and highly evolved planetary nebula located 3900 light years from Earth in the constellation of Orion.[3] It has a reddish color and is very faint. Abell 13 has a circular outer ring of Ha (Hydrogen-alpha).[4]
| Emission nebula | |
|---|---|
| Planetary nebula | |
 H-alpha image of Abell 13 taken with the Very Large Telescope | |
| Observation data: J2000 epoch | |
| Right ascension | 06h 04m 47.9s[1] |
| Declination | +03° 56′ 36″[1] |
| Distance | 3900 ly |
| Apparent magnitude (V) | 19.87[1] |
| Apparent dimensions (V) | 2' 32".58[1] |
| Constellation | Orion |
| Notable features | An attractive PN |
| Designations | A66 13, PK 204-08.1, PN G 204.0-08.5, GSC2 N220002316027, UBC 6150, PN YM 28, UBV M 44654, CSI +03-06022 |
The nebula was discovered in 1955 by an American astronomer named George Ogden Abell on the photo plates of the Palomar Observatory Sky Survey (POSS).[5]
References
edit- ^ a b c d "Object query : PN A66 13". Simbad. Centre de Données astronomiques de Strasbourg. Retrieved 7 January 2015.
- ^ "Abell 13". IMAGINGDEEPSPACE.COM. Retrieved 2024-05-10.
- ^ "Abell 13". stellarscenes.net. Retrieved 2024-05-10.
- ^ Iovene, Salvatore. "Abell 13 Planetary Nebula". AstroBin. Retrieved 2023-11-26.
- ^ "Planetary Nebula Abell 13 | Deep⋆Sky Corner". www.deepskycorner.ch. Retrieved 2023-11-26.
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