Beta Phoenicis
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Double star β Phoenicis |
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| AladinLite | |||||||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Phoenix | ||||||||||||||
| Right ascension | 01 h 06 m 5.04 s | ||||||||||||||
| declination | -46 ° 43 ′ 6.3 ″ | ||||||||||||||
| Apparent brightness | 3.30 (3.22 to 3.32) mag | ||||||||||||||
| Typing | |||||||||||||||
| B − V color index | (+0.89) | ||||||||||||||
| U − B color index | (+0.56) | ||||||||||||||
| R − I index | (+0.51) | ||||||||||||||
| Spectral class | G8 III / G8 III | ||||||||||||||
| Astrometry | |||||||||||||||
| Radial velocity | (−1.10 ± 0.74) km / s | ||||||||||||||
| parallax | (0.12 ± 14.62) mas | ||||||||||||||
| distance | (200) ly | ||||||||||||||
| Proper movement | |||||||||||||||
| Rec. Share: | (−80.81 ± 13.24) mas / a | ||||||||||||||
| Dec. portion: | (34.97 ± 9.51) mas / a | ||||||||||||||
| Physical Properties | |||||||||||||||
| Dimensions | (2.5 / 2.5) M ☉ | ||||||||||||||
| Effective temperature | (4950/4950) K. | ||||||||||||||
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Other names and catalog entries |
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β Phoenicis is a double star in the constellation Phoenix . Both stars in the system are yellow giants of the spectral class G8 III and have almost the same level of development and the same properties. The two stars orbit each other on a very elliptical orbit with a period of 168 years. What is special about the system is that, despite the great brightness, it has not yet been possible to determine the distance using the parallax method . The data from the Hipparcos satellite result in an extremely large error range for parallax. Due to the spectral class of the two stars, a very rough determination of the distance to about 200 light years is possible.