Lambda Velorum
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Vela |
| Right ascension | 09h 07m 59.8s |
| Declination | -43° 25′ 57″ |
| Apparent magnitude (V) | 2.23 |
| Characteristics | |
| Spectral type | K4.5 Ib-II |
| U-B color index | 1.81 |
| B-V color index | 1.67 |
| Variable type | Irregular variable |
| Astrometry | |
| Radial velocity (Rv) | 18 km/s |
| Proper motion (μ) | RA: -23.21 mas/yr Dec.: 14.28 mas/yr |
| Parallax (π) | 5.69 ± 0.53 mas |
| Distance | 570 ± 50 ly (180 ± 20 pc) |
| Absolute magnitude (MV) | -3.99 |
| Details | |
| Mass | 9 M☉ |
| Radius | 200 R☉ |
| Luminosity | 10,000 L☉ |
| Temperature | 4,000 K |
| Metallicity | ? |
| Rotation | ? |
| Age | 2.7 × 107 years |
| Other designations | |
Lambda Velorum (λ Vel or λ Velorum) is a star in the constellation Vela. It also has the traditional name Suhail (which, confusingly, is sometimes used for Gamma Velorum).
Lambda Velorum is a supergiant or bright giant star of spectral class K5. Supergiant stars use up their hydrogen "fuel" much faster than do smaller stars and λ Velorum is estimated to be only some 27 million years old. It is classified as an irregular variable star and its brightness varies from magnitude +2.14 to +2.30.
[edit] Etymology
The medieval name Suhail (Al Suhail, Alsuhail, Suhail Alwazn) is short for the Arabic suhayl al-wazn "The glorious (star) of the cycle".
[edit] External links
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