Kaus Borealis
Stern Kaus Borealis |
|||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
AladinLite | |||||||||||||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
|||||||||||||||||||||||
Constellation | Sagittarius | ||||||||||||||||||||||
Right ascension | 18 h 27 m 58.2 s | ||||||||||||||||||||||
declination | -25 ° 25 ′ 18 ″ | ||||||||||||||||||||||
Apparent brightness | 2.8 mag | ||||||||||||||||||||||
Typing | |||||||||||||||||||||||
Spectral class | K0 IV | ||||||||||||||||||||||
Astrometry | |||||||||||||||||||||||
Radial velocity | −43.2 ± 0.9 km / s | ||||||||||||||||||||||
parallax | 41.72 ± 0.16 mas | ||||||||||||||||||||||
distance | 78.2 ± 0.3 ly 24.0 ± 0.1 pc |
||||||||||||||||||||||
Proper movement | |||||||||||||||||||||||
Rec. Share: | approx. −45 mas / a | ||||||||||||||||||||||
Dec. portion: | approx. −186 mas / a | ||||||||||||||||||||||
Physical Properties | |||||||||||||||||||||||
Other names and catalog entries |
|||||||||||||||||||||||
|
Kaus Borealis ( Arabic قوس, DMG Qaūs 'bow' and Latin borealis, "north"), Bayer name Lambda Sagittarii , is a star in the constellation Sagittarius . Lambda Sagittarii has an apparent magnitude of 2.8 mag and belongs to the spectral class K0; its distance is just under 80 light years . As ekliptiknaher star he can from the moon and (rarely) by planets covered are. The last occultation by a planet took place on November 19, 1984 by Venus, the penultimate on December 5, 1865 by Mercury.