NGC 2438
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Planetary nebula data from NGC 2438 |
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| Image taken with the 81 cm reflecting telescope of the Mount Lemmon Observatory | |
| AladinLite | |
| Constellation | Aft deck of the ship |
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Position equinox : J2000.0 |
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| Right ascension | 07h 41m 50.4s |
| declination | -14 ° 44 ′ 09 ″ |
| Appearance | |
| Apparent brightness (visual) | 10.8 mag |
| Apparent brightness (B-band) | 10.1 mag |
| Angular expansion | 1.27 ′ × 1.27 ′ |
| Central star | |
| designation | HD 62099 |
| Apparent brightness | 17.7 mag |
| Physical data | |
| Redshift | +0.000252 |
| Radial velocity | +75.4 km / s |
| distance | 2900 ly |
| history | |
| discovery | William Herschel |
| Date of discovery | March 19, 1786 |
| Catalog names | |
| NGC 2438 • PK 231 + 4.2 • GC 1565 • CS = 17.7, h 464, h 3093, H IV 39 | |
NGC 2438 is a planetary nebula in the constellation Puppis and the remnant of a star around 4 solar masses . It was discovered on March 19, 1786 by the German-British astronomer William Herschel .
False color image of the Hubble Space Telescope with line filters : 502 nm (OIII) is blue, 656 nm (Hα) is green and 672 nm (SII) is coded red.
When observed, the nebula appears to form a unit with the open star cluster Messier 46 . This is in the same direction, but at a distance of 5400 light years it is about 2500 light years further away. However, its radial velocity , which is almost the same, speaks in favor of belonging to the star cluster M 46 .
The white dwarf in the center of NGC 2438 has an apparent magnitude of 17.7 mag.
Web links
- Planetary Nebula NGC 2438 - Astronomy Picture of the Day of April 7, 2011 (English).
- Astronomie.de
- GoBlack