Hb 4
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Planetary nebula Hb 4 |
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
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Position equinox : J2000.0 |
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| Right ascension | 17h 41m 52.8s |
| declination | -24 ° 42 ′ 08.1 ″ |
| Appearance | |
| Central star | |
| Physical data | |
| history | |
| Catalog names | |
| PK 003 + 02.1 • PN G003.1 + 02.9 • ESO 520-17 • Hen 2-266 | |
Hb 4 ( PN G003.1 + 02.9 , PK 3 + 2 1 ) is a planetary nebula that was discovered by Edwin Hubble in 1921. Its distance is assumed to be 2.6 kpc. In the center is a Wolf-Rayet star of the type WC 3-4. The elliptical nebula expands at a little more than 20 km / s, while the weakly ionized and glowing, corkscrew-like jets have speeds of 150 km / s.
swell
- ↑ a b G003.1 + 02.9 in the VizieR database access on the CDS .
- ↑ JA López, W. Steffen, J. Meaburn: BIPOLAR, COLLIMATED OUTBURSTS IN THE PLANETARY NEBULA Hb 4 (PDF; 3.1 MB), THE ASTROPHYSICAL JOURNAL, 485: 697-702, 1997 August 20