NGC 2440

NGC 2440 Geckzilla
Image captured by the Hubble Space Telescope

Observation Data
Epoch: J2000
Right Ascension: 07h 41m 54.91s[1]
Declination: -18° 12′ 29.7″[1]
Constellation: Puppis
Apparent Dimensions (V): 74" × 42"[2]
Apparent Magnitude (V): 9.4[2]
Absolute Magnitude (V):
Type: bipolar,
Radius: 0.547 arcmin
Helio Radial Velocity: 62.7
Redshift: 0.000209
Distance: 4.00 kly (1.23 kpc)[3]
Other Designations
ESO 560-PN9

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 Puppis constellation.

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."[2] The nebula is located about 1.23 kiloparsecs (3.79×1019 m) or about 4,000 light years from the Sun.[3]

HD 62166

HD 62166 has an exceptionally high surface temperature of about 200,000 kelvins[3] 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

External links


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