Gamma Velorum
| γ Velorum | |
|---|---|
  |
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| position | |
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Vela |
| Right ascension | 08 h 09.5 m |
| declination | −47 ° 20 ′ 0 ″ |
| brightness | total: approx. 1.8 mag B: 4.2 mag |
| Spectral class | A: WC8 + O P: K4 V B: B1 IV |
| Physical data | |
| distance | about 1000 light years |
| Catalog names | |
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γ Velorum: Δ65 • WDS 08095-4720 γ 1 Vel / γ Vel B: CD −46 ° 3846 • HR 3206 • HD 68243 • HIP 39953 • TYC 8140-6534-1 • SAO 219501 γ 2 Vel / γ Vel A: CD −46 ° 3847 • CD −46 ° 3840 • HR 3207 • HD 68273 • TYC 8140-6533-1 • SAO 219504 |
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γ Velorum ( Gamma Velorum , short γ Vel ) is a star system in the constellation Vela . It is about 1000 light years away. This young system is associated with the Vela OB2 association and the Gum Nebula . A historical proper name is Suhail or actually Suhail al-Muhlif (from Arabic سهيل المحلف, DMG Suhail al-muḥlif ).
Even in binoculars, the star can be separated into the components γ 1 Velorum (also γ Velorum B ) and γ 2 Velorum (also γ Velorum A ). They have an angular distance of 41 ″, 2 and are at a position angle of 220 °.
Component A, γ 2 Velorum , is a massive spectroscopic double star system (double-lined) with an orbital period of 78.5 days and consists of a blue supergiant and a Wolf-Rayet star . Another component with the designation P was discovered through observations in the infrared using adaptive optics at a distance of 4 ", 7 at a position angle of 13 °. She is likely a physical companion and her dates match a K4 star slightly above the main sequence .
Component B, γ 1 Velorum , was classified B1 IV and has a brightness of 4.2 mag. It was resolved by means of speckle interferometry at Kitt Peak and Cerro Tololo as a double star with the components Ba and Bb.
Trivia
The occasional name Regor for this star is of modern origin and goes back to a joke by the Apollo astronaut Virgil "Gus" Grissom , who used the names of the Apollo 1 team as " Navi " (for Virgil Ivan Grissom), " Dnoces " (for Edward H. White the second ) and "Regor" (for Roger Chaffee) on a list of navigational stars.
See also
Individual evidence
- ↑ AA Tokovinin et al., A near IR adaptive optics search for faint companions to early-type multiple stars , in: Astronomy & Astrophysics 346, 481 (1999), bibcode : 1999A & A ... 346..481T
- ↑ BD Mason et al .: The High Angular Resolution Multiplicity of Massive Stars , in: Astronomical Journal 137, 3358 (2009), bibcode : 2009AJ .... 137.3358M
- ↑ Apollo 15 Lunar Surface Journal: Post-Landing Activities, Commentary on 105: 11: 33