Seginus
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Star Seginus (γ Bootis) |
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| AladinLite | |||||||||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Bear keeper | ||||||||||||||||
| Right ascension | 14 h 32 m 4.67 s | ||||||||||||||||
| declination | + 38 ° 18 ′ 29.7 ″ | ||||||||||||||||
| Apparent brightness | 3.04 mag | ||||||||||||||||
| Typing | |||||||||||||||||
| B − V color index | +0.19 | ||||||||||||||||
| U − B color index | +0.12 | ||||||||||||||||
| R − I index | +0.08 | ||||||||||||||||
| Spectral class | A7 IIIvar | ||||||||||||||||
| Variable star type | DSCTC | ||||||||||||||||
| Astrometry | |||||||||||||||||
| Radial velocity | (−32.4 ± 1.0) km / s | ||||||||||||||||
| parallax | (37.58 ± 0.14) mas | ||||||||||||||||
| distance | (86.79 ± 0.32) Lj (26,610 ± 0,099) pc |
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| Visual absolute brightness M vis | +0.91 mag | ||||||||||||||||
| Proper movement | |||||||||||||||||
| Rec. Share: | (−115.71 ± 0.10) mas / a | ||||||||||||||||
| Dec. portion: | (151.16 ± 0.11) mas / a | ||||||||||||||||
| Physical Properties | |||||||||||||||||
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Other names and catalog entries |
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Seginus or γ Bootis ( gamma in Bootes , short form γ Boo ) is an approximately 85 light years from the Earth remote rating of spectral A7 III and represents the right shoulder of the mythological shape of the boat. Seginus is a weakly variable star type delta- Scuti star , the brightness of which fluctuates between 2.95 mag and 3.05 mag with a period of 0.29 days .
His proper name Seginus (also Ceginus ) arose through Latinization from an Arabic form of the Greek name of the constellation Bootes ( Theguius ). Another name Haris goes back to the Arabic name of the constellation, Al Haris al Sama , which means something like "guardian, protector" (of the great bear).
In the sky, Seginus forms an equilateral triangle with the stars Arktur (α Boo) and Gemma (α CrB), roughly in the extension of the drawbar of the Big Dipper (top right in the picture).