WR 31a

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Star
WR 31a
Photo from the Hubble Space Telescope
Photo from the Hubble Space Telescope
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
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
Tycho catalog TYC 8958-1166-1 [1]
2MASS catalog 2MASS J10535958-6026444 [2]
Other names WR 31a

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

  1. ↑ a b c d e WRAY 15-682. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 14, 2018 .
  2. ↑ astronews.com
  3. ↑ David J. Frew, Ivan S. Bojicic, QA Parker: A catalog of integrated Halpha fluxes for 1258 Galactic planetary nebulae , bibcode : 2013MNRAS.431 .... 2F