Eskimo Nebula
Planetary nebula in the constellation Gemini / From Wikipedia, the free encyclopedia
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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.
Emission nebula | |
---|---|
Planetary nebula | |
Observation data: 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 |
See also: Lists of nebulae |
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 O-type star with a spectral type of O(H)6f.[7]