WR 31a
Star WR 31a |
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Photo from the Hubble Space Telescope | |||||||
AladinLite | |||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | Keel of the ship | ||||||
Right ascension | 10 h 53 m 59.58 s | ||||||
declination | -60 ° 26 ′ 44.4 ″ | ||||||
Apparent brightness | 10.85 ± 0.08 mag | ||||||
Typing | |||||||
B − V color index | (0.79) | ||||||
Spectral class | WN11h | ||||||
Astrometry | |||||||
Proper movement | |||||||
Rec. Share: | (−5.83 ± 0.05) mas / a | ||||||
Dec. portion: | (2.66 ± 0.05) mas / a | ||||||
Physical Properties | |||||||
Other names and catalog entries |
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WR 31a is a Wolf-Rayet star in the constellation Kiel des Schiff in the southern sky . The bubble was formed about 20,000 years ago and is expanding at a rate of about 220,000 kilometers per hour.
It was initially suspected that it is also a planetary nebula , which, according to recent studies, is not the case.
Individual evidence
- ↑ a b c d e WRAY 15-682. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 14, 2018 .
- ↑ astronews.com
- ↑ David J. Frew, Ivan S. Bojicic, QA Parker: A catalog of integrated Halpha fluxes for 1258 Galactic planetary nebulae , bibcode : 2013MNRAS.431 .... 2F