Delta Velorum
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Multiple star Delta Velorum |
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| The components of Delta Velorum | |||||||||||||||||||||
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| AladinLite | |||||||||||||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Sails of the ship | ||||||||||||||||||||
| Right ascension | 08 h 44 m 42.23 s | ||||||||||||||||||||
| declination | -54 ° 42 ′ 31.8 ″ | ||||||||||||||||||||
| Apparent brightness | 1.93 likes | ||||||||||||||||||||
| Typing | |||||||||||||||||||||
| B − V color index | +0.04 | ||||||||||||||||||||
| U − B color index | +0.07 | ||||||||||||||||||||
| R − I index | +0.02 | ||||||||||||||||||||
| Spectral class | A0 V / A1 V | ||||||||||||||||||||
| Variable star type | EA | ||||||||||||||||||||
| Astrometry | |||||||||||||||||||||
| Radial velocity | +2.2 km / s | ||||||||||||||||||||
| parallax | (40.49 ± 0.39) mas | ||||||||||||||||||||
| distance | (80.6 ± 0.8) ly (24.7 ± 0.2) pc |
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| Visual absolute brightness M vis | −0.03 mag | ||||||||||||||||||||
| Proper movement | |||||||||||||||||||||
| Rec. Share: | (+28.99 ± 0.50) mas / a | ||||||||||||||||||||
| Dec. portion: | (−103.35 ± 0.54) mas / a | ||||||||||||||||||||
| Physical Properties | |||||||||||||||||||||
| Luminosity |
vis. approx. 90 L ☉ |
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Other names and catalog entries |
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Delta Velorum (Bayer name, δ Vel for short) is a star system in the constellation Sails of the Ship . It is about 80 light years from Earth. The system consists of two double stars . The brightest of the four stars, Delta Velorum A , is a white main sequence star with a magnitude of +2 mag . Its companion Delta Velorum B , has a brightness of approx. 5 mag and is 2.6 arc seconds away from component A. The second double system is 69 arc seconds away. It consists of the star 11th magnitude Delta Velorum C and the star 13th magnitude Delta Velorum D, which are separated by 6 arc seconds.
On September 5, 2017, the IAU gave the name Alsephina, which is visible to the naked eye .
| Components | Right ascension | declination | vis. Brightness (mag) | Reference point |
Distance from Ref. Point ( arcsec ) |
Direction from Ref. Point |
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| A. | 08 h 44 m 42.2 s | −54 ° 42 ′ 30 ″ | 2.1 | |||
| B. | 08 h 44 m 42.2 s | −54 ° 42 ′ 28 ″ | 5.1 | A. | 2.6 | 153 ° |
| C. | 08 h 44 m 48.9 s | −54 ° 41 ′ 46 ″ | 11.0 | A. | 69.2 | 61 ° |
| D. | 08 h 44 m 49.6 s | −54 ° 41 ′ 48 ″ | 13.5 | C. | 6.2 | 102 ° |