NGC 2440

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NGC 2440
NGC 2440 by HST.jpg
Observation data: J2000 epoch
Right ascension07h 41m 54.91s[1]
Declination−18° 12′ 29.7″[1]
Distance4.00 kly (1.23 kpc)[2] ly
Apparent magnitude (V)9.4[3]
Apparent dimensions (V)74" × 42"[3]
DesignationsESO 560-PN9
See also: Lists of nebulae

NGC 2440 is a planetary nebula, one of many in our galaxy. Its central star, HD62166,[1] is possibly the hottest known white dwarf. The nebula is situated in the constellation Puppis.

It was discovered by William Herschel on March 4, 1790. He described it as "a beautiful planetary nebula of a considerable degree of brightness, not very well defined."[3] The nebula is located about 1.23 kiloparsecs (3.79×1019 m) or about 4,000 light years from the Sun.[2]

HD 62166[edit]

HD 62166 has an exceptionally high surface temperature of about 200,000 kelvins[2] and a luminosity 1,100 times that of the Sun.[4] This dense star, with an estimated 0.6 solar mass and 0.028 solar radius,[4] has an apparent magnitude of 17.5.[5]

See also[edit]



  • SIMBAD (January 9, 2007), Results for NGC 2440, SIMBAD, Centre de Données Astronomiques de Strasbourg
  • Nemiroff, R.; Bonnell, J., eds. (February 15, 2007). "Planetary Nebula NGC 2440". Astronomy Picture of the Day. NASA.
  • James, Renée; Marion, Howie (April 2006), "X-treme Stars of the cosmos", Astronomy, Kalmbach Publishing Co., 34 (4): 34–39 External link in |journal= (help)
  • O'Meara, Stephen James (2007), "Albino Butterfly, Kiss Nebula, Little Lips Nebula: NGC 2440", Hidden Treasures, Cambridge University Press: 204–208

External links[edit]