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Planetary nebula in the constellation Vela From Wikipedia, the free encyclopedia
NGC 2792 is a planetary nebula located in the constellation Vela.[1] NGC 2792 was discovered by British astronomer John Herschel in 1835.[2]
| Nebula | |
|---|---|
| |
| Observation data: J2000 epoch | |
| Right ascension | 09h 12m 26s |
| Declination | -42° 25′ 39″ |
| Constellation | Vela |
| Designations | PK 265+4.1,
ESO 314-PN6, AM 0910-421, CS=13.8, HD 79384, IRAS 09105-4213, WEB 8618, PMN J0912-4225, 2MASS J09122664-4225397 |
With an apparent visual magnitude of 11.6,[3] you must use a telescope with an aperture of at least 200 mm to observe it.[4]
Two very similar distances are indicated on the SIMBAD database: 3.086 ± 0.617 kpc (~10,100 ly) and approximately 3050 pc (~9,950 ly).[5]
The apparent size of the nebula is 0.350′ × 0.315, which, given the distance of 3,086 ± 617 pc and through simple calculation, equates to an actual size of 1.02 ± 0.20 al × 0 .92 ± 0.18 ly.[5]
Two identical speed values are also indicated on SIMBAD, i.e. 14.0 ± 5.0 km/s. According to a more recent publication (2023) the speed of the nebula is 12.7 ± 8 km/s.[5]
The kinematic age of a planetary nebula can be estimated from its expansion speed. According to González-Santamaría and his colleagues, the expansion speed of NGC 2792 is 20 km/s, which gives it a kinematic age of 3.5 thousand years. According to a more recent publication, its expansion speed is 20.2 km/s.[6]
According to González-Santamaría, it has been approximately 50,860 years since the star left the asymptotic giant branch and the nebula enveloping it reached 1% of the mass of the progenitor.[6]
The visual magnitude of this star is equal to 16.74 and its mass is estimated at 1.163 solar masses. The radius of the nebula is estimated at 0.108 pc.[7]
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