WR 124
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Double star WR 124 |
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| Wolf-Rayet star WR-124 with surrounding planetary nebula M1-67 (photo taken by the Hubble telescope ) | |||||||||
| AladinLite | |||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | arrow | ||||||||
| Right ascension | 19 h 11 m 30.88 s | ||||||||
| declination | + 16 ° 51 ′ 38.2 ″ | ||||||||
| Apparent brightness | 11.17 to 11.25 mag | ||||||||
| Typing | |||||||||
| Spectral class | WN8 | ||||||||
| Variable star type | ELL / WR | ||||||||
| Astrometry | |||||||||
| Radial velocity | (190.0 ± 7.4) km / s | ||||||||
| parallax | (0.12 ± 0.04) mas | ||||||||
| distance | (11000 ± 2000) ly (3350 ± 670) pc |
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| Visual absolute brightness M vis | (−5.3 +0.4−0.5) like | ||||||||
| Proper movement | |||||||||
| Rec. Share: | (−2.65 ± 0.05) mas / a | ||||||||
| Dec. portion: | (−5.53 ± 0.05) mas / a | ||||||||
| Physical Properties | |||||||||
| Dimensions | (9.0 ± 2.5) M ☉ | ||||||||
| radius | (10.1 +2.8−2.6) R ☉ | ||||||||
| Luminosity |
(150000 +80000−60000) L ☉ |
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| Effective temperature | (35800 ± 2000) K. | ||||||||
| Age | 8.6 million a | ||||||||
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Other names and catalog entries |
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WR 124 (also QR Sge or Hen 2-427 called) is a giant star in the constellation arrow and one of the rare Wolf-Rayet star with a surface temperature of 35,000 K . The star, more than 10,000 light years away, has an apparent magnitude of 11.2 mag. The extreme stellar wind that emanates from it has been driving its shell away from it at high speed for about 10,000 years, creating an impressive circumstellar nebula called M1-67 around it.
Web links
Commons : WR124 - collection of pictures, videos and audio files
- http://www.site.uottawa.ca:4321/astronomy/index.html#WR124
- astronews: Picture of the day August 18, 2015
- https://www.spacetelescope.org/images/potw1533a/
Individual evidence
- ↑ a b c Hen 2-427. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 11, 2018 .
- ↑ a b c QR Sge. In: VSX. AAVSO, accessed September 11, 2018 .
- ↑ a b c d e f g S. V. Marchenko, AFJ Moffat, PA Crowther: Population I Wolf-Rayet Runaway Stars: The Case of Wr124 and Its Expanding Nebula M1-67 . In: The Astrophysical Journal . 724, 2010, p. L90. arxiv : 1011.0785 . bibcode : 2010ApJ ... 724L..90M . doi : 10.1088 / 2041-8205 / 724/1 / L90 .
- ↑ Archived copy ( Memento of the original dated June 14, 2007 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
