FS Canis Majoris
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Double star FS Canis Majoris |
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Big dog | ||||||||||||
| Right ascension | 06 h 28 m 17.42 s | ||||||||||||
| declination | -13 ° 03 ′ 11.1 ″ | ||||||||||||
| Apparent brightness | 8.50 (7.35 to 8.58) mag | ||||||||||||
| Typing | |||||||||||||
| B − V color index | +0.02 | ||||||||||||
| U − B color index | −0.66 | ||||||||||||
| R − I index | +0.10 | ||||||||||||
| Spectral class | B2 IVep | ||||||||||||
| Variable star type | FSCMa | ||||||||||||
| Astrometry | |||||||||||||
| Radial velocity | +21.6 km / s | ||||||||||||
| parallax | 1.60 ± 0.06 mas | ||||||||||||
| distance | 2,000 ly 600 pc |
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| Proper movement | |||||||||||||
| Rec. Share: | +1.61 mas / a | ||||||||||||
| Dec. portion: | +1.37 mas / a | ||||||||||||
| Physical Properties | |||||||||||||
| Dimensions | 9.3 ± 0.5 M ☉ 4.8 ± 0.9 M ☉ |
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| radius | 6.6 ± 0.5 R ☉ 2.9 ± 0.6 R ☉ |
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| Effective temperature | 21600 ± 350 K 16380 ± 1670 K |
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Other names and catalog entries |
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FS Canis Majoris (short FS CMa ) is a star of the spectral class B at a distance of about 2000 light years . It is the prototype of the FS Canis Majoris stars , which belong to the Eruptive Variable Stars .
Investigations of the spectrum in 2006 showed that FS Canis Majoris is probably a binary star system . The system is between 1250 and 8000 times brighter than the sun.
See also
Individual evidence
- ↑ a b c d e f g HD 45677. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on October 31, 2018 .
- ↑ a b c FS CMa. In: VSX. AAVSO, accessed October 31, 2018 .
- ↑ a b c Cidale, L .: BCD spectrophotometry of stars with the B [e] phenomenon. I. Fundamental parameters . In: Astronomy and Astrophysics . 368, 2001, pp. 160-74. bibcode : 2001A & A ... 368..160C . doi : 10.1051 / 0004-6361: 20000409 .
- ^ Baines, Deborah: On the binarity of Herbig Ae / Be stars . In: Monthly Notices of the Royal Astronomical Society . 367, No. 2, 2006, pp. 737-53. arxiv : astro-ph / 0512534 . bibcode : 2006MNRAS.367..737B . doi : 10.1111 / j.1365-2966.2006.10006.x .
- ↑ Miroshnichenko, Anatoly S .: Toward Understanding the B [e] Phenomenon. I. Definition of the Galactic FS CMa Stars . In: The Astrophysical Journal . 667, No. 1, 2007, pp. 497-504. bibcode : 2007ApJ ... 667..497M . doi : 10.1086 / 520798 .