KV Velorum
Double star KV Velorum |
|||||||||
---|---|---|---|---|---|---|---|---|---|
AladinLite | |||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
|||||||||
Constellation | Sails of the ship | ||||||||
Right ascension | 10 h 54 m 40.56 s | ||||||||
declination | -48 ° 47 ′ 2.8 ″ | ||||||||
Apparent brightness | 12.12 (11.78 to 12.34) mag | ||||||||
Typing | |||||||||
rel. Brightness (G-band) |
(12.18 ± 0.01) mag | ||||||||
rel. Brightness (J-band) |
(12.61 ± 0.03) mag | ||||||||
B − V color index | (-0.13) | ||||||||
U − B color index | (-1.07) | ||||||||
Spectral class | sdO | ||||||||
Variable star type | R / PN | ||||||||
Astrometry | |||||||||
Radial velocity | (−25) km / s | ||||||||
parallax | (1.29 ± 0.04) mas | ||||||||
distance | (2,500) ly (800) pc |
||||||||
Proper movement | |||||||||
Rec. Share: | (−18.16 ± 0.07) mas / a | ||||||||
Dec. portion: | (7.73 ± 0.06) mas / a | ||||||||
Physical Properties | |||||||||
Other names and catalog entries |
|||||||||
|
KV Velorum is a double star in the constellation Vela at a distance of about 2500 light years . The system consists of a hot sub- dwarf of the spectral class sdO, which forms the bright component, and a main sequence star as a companion. The hot sub-dwarf creates strong reflections on the companion's star surface, making the system one of a relatively rare class of rotationally variable stars . The system will likely evolve into a cataclysmic system . Furthermore, the system is surrounded by a planetary nebula .
Individual evidence
- ↑ a b c d e f g h i CD-48 6027. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed October 20, 2019 .
- ↑ a b c KV Vel. In: VSX. AAVSO , accessed October 20, 2019 .
- ↑ Márcio Catelan and Horace A. Smith: Pulsating Stars . Wiley , 2015, ISBN 978-3-527-40715-6 , pp. 32–33 (English, google.ch [accessed October 20, 2019]).