Eskimo Nebula
07h 29m 10.7669s, +20° 54′ 42.488″J2000 epoch | |
|---|---|
| Right ascension | 07h 29m 10.7669s[1] |
| Declination | +20° 54′ 42.488″[1] |
| Distance | 6520±560[2] ly |
| Apparent magnitude (V) | 10.1[1] |
| Apparent dimensions (V) | 48″; × 48″;[3] |
| Constellation | Gemini |
| Physical characteristics | |
| Radius | ≥0.34 ly[a] ly |
| Absolute magnitude (V) | ≤0.4[b] |
| Notable features | – |
| Designations | NGC 2392,[1] Caldwell 39, PN G197.8+17.3 Central Star: HIP 36369, HD 59088, TYC 1372-1287-1 |
The Eskimo Nebula (NGC 2392), also known as the Clown-faced Nebula, Lion Nebula,[4] or Caldwell 39, is a bipolar[5] double-shell[6] planetary nebula (PN). It was discovered by astronomer William Herschel in 1787. The formation resembles a person's head surrounded by a parka hood. It is surrounded by gas that composed the outer layers of a Sun-like star. The visible inner filaments are ejected by a strong wind of particles from the central star. The outer disk contains unusual, light-year-long filaments.
NGC 2392 lies about 6500 light-years away, and is visible with a small telescope in the constellation of Gemini.
At the center of NGC 2392, there is an
Historic data
The nebula was discovered by William Herschel on January 17, 1787, in Slough, England. He described it as "A star 9th magnitude with a pretty bright middle, nebulosity equally dispersed all around. A very remarkable phenomenon."[8] NGC 2392 WH IV-45 is included in the Astronomical League's Herschel 400 observing program.
Location
- NGC 2392 is located just east of δ Geminorum, just south the ecliptic.
Naming controversy
On 11 August 2020, the
See also
Notes
References
- ^ a b c d e "NGC 2392". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2006-12-22.
- ^ Gaia Collaboration et al. (2018b): Summary of the contents and survey properties
- doi:10.1086/340726.
- ^ Deep-Sky Companions: The Caldwell Objects, 2nd Edition, Stephen James O'Meara, 2016, p.181
- Bibcode:2003RMxAC..15...29O. Archived from the originalon 2018-05-01. Retrieved 2007-01-04.
- S2CID 6518963.
- S2CID 237940344.
- J. L. E. Dreyer, Royal Society, London 1912
- ^ Talbert, Tricia (11 August 2020). "NASA to Reexamine Nicknames for Cosmic Objects". NASA. Retrieved 11 August 2020.
External links
- NGC 2392 on
- APOD (2003-12-07) – NGC 2392
- Eskimo Nebula Lowell Observatory
- The Structure & Evolution of the Eskimo Planetary Nebula University of Maryland Astronomy Department
- A Kinematic Determination of the Structure of the Double Ring Planetary Nebula NGC 2392, the Eskimo Astrophysical Journal v.362, p. 226 October 1990
- A Cat's Eye view of the Eskimo from Saturn Maria-Teresa Garc ́ıa-D ́ıaz, Jose-Alberto L ́opez, Wofgang Steffen, Michael G. Richer and Hortensia Riesgo, 2011
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