Kappa Velorum
Double star κ Velorum |
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AladinLite | |||||||||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | Sails of the ship | ||||||||||||||||||
Right ascension | 09 h 22 m 6.82 s | ||||||||||||||||||
declination | −55 ° 00 ′ 38.4 ″ | ||||||||||||||||||
Apparent brightness | 2.47 mag | ||||||||||||||||||
Typing | |||||||||||||||||||
B − V color index | −0.18 | ||||||||||||||||||
U − B color index | −0.75 | ||||||||||||||||||
R − I index | −0.19 | ||||||||||||||||||
Spectral class | B2 IV | ||||||||||||||||||
Astrometry | |||||||||||||||||||
Radial velocity | (21.9 ± 3.9) km / s | ||||||||||||||||||
parallax | (5.70 ± 0.30) mas | ||||||||||||||||||
distance | (570 ± 30) ly (175 ± 9) pc |
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Visual absolute brightness M vis | −4 likes | ||||||||||||||||||
Proper movement | |||||||||||||||||||
Rec. Share: | (−11.40 ± 0.32) mas / a | ||||||||||||||||||
Dec. portion: | (+11.52 ± 0.27) mas / a | ||||||||||||||||||
Physical Properties | |||||||||||||||||||
Other names and catalog entries |
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κ Velorum ( Kappa Velorum , κ Vel for short ) is a spectroscopic binary star with an apparent visual brightness of 2.5 mag and an orbital period of about 117 days. The star system lies in the constellation Vela and is about 570 light years away. κ Velorum has the historical proper name Markab (sometimes also written Markeb to distinguish it from other stars of the same name ).
The star is only a few degrees from the southern celestial pole of Mars, so it could be considered the southern polar star of Mars.
See also
Web links
literature
- Curtis, HD: Orbit of the spectroscopic binary κ Velorum ; in: Lick Obs. Bull., No. 4, pp. 155f. (1907), bibcode : 1907LicOB ... 4..155C