NGC 2440
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| NGC 2440 | |
 |
|
| Observation data (Epoch J2000) |
|
|---|---|
| Right ascension | 07h 41m 54.91s[1] |
| Declination | -18° 12′ 29.7″[1] |
| Apparent magnitude (V) | 18.9B[1] |
| Apparent dimensions (V) | 1′.3 |
| Constellation | Puppis |
| Physical characteristics | |
| See also: Planetary nebula, Lists of nebulae | |
NGC 2440 is a planetary nebula, one of some 1,500 in our galaxy. Its central star, a white dwarf (HD 62166[1]), has an exceptionally high surface temperature of 200,000 kelvins.[2] The nebula is situated in the Puppis constellation.
[edit] External links
- Hubble Space Telescope reveals NGC 2440 on YouTube
- http://antwrp.gsfc.nasa.gov/apod/ap070215.html
- http://antwrp.gsfc.nasa.gov/apod/ap060507.html
- http://antwrp.gsfc.nasa.gov/apod/ap050123.html
- http://antwrp.gsfc.nasa.gov/apod/ap040111.html
- http://antwrp.gsfc.nasa.gov/apod/ap010805.html
- http://antwrp.gsfc.nasa.gov/apod/ap000730.html
- http://antwrp.gsfc.nasa.gov/apod/ap990703.html
- http://antwrp.gsfc.nasa.gov/apod/ap980426.html
- http://antwrp.gsfc.nasa.gov/apod/ap951130.html
[edit] Notes
- ^ a b c d (SIMBAD 2007)
- ^ (Nemiroff & Bonnell 2007)
[edit] References
- SIMBAD (January 9, 2007), Results for NGC 2440, SIMBAD, Centre de Données Astronomiques de Strasbourg, <http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=NGC+2440>
- Nemiroff, Robert & Bonnell, Jerry (February 15, 2007), Astronomy Picture of the Day, ASD at NASA / GSFC & Michigan Tech. U., <http://antwrp.gsfc.nasa.gov/apod/ap070215.html>
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