Beta Reticuli
|
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Reticulum |
| Right ascension | 03h 44m 11.55s |
| Declination | −64° 48′ 25.5″ |
| Apparent magnitude (V) | +3.84 |
| Distance | 100 ly (31 pc) |
| Spectral type | K0IV SB |
| Other designations | |
Beta Reticuli (Beta Ret, β Reticuli, β Ret) is triple star system and spectroscopic binary in constellation of Reticulum, with an apparent magnitude of +3.84. The primary component is an orange K-type giant. It is approximately 100 light years from Earth.
Beta Reticuli is moving through the Galaxy at a speed of 69.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 10,100 and 24,200 light years from the center of the Galaxy.[1]
Beta Reticuli came closest to the Sun 319,000 years ago when it had brightened to magnitude 2.98 from a distance of 67 light years.[1]
Naming
In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, 蛇首 (Shé Shǒu), meaning Snake's Head, refers to an asterism consisting of β Reticuli and α Hydri. Consequently, β Reticuli itself is known as 蛇首二 (Shé Shǒu èr, English: the Second Star of Snake's Head.)[2]
References
- 1 2 Beta Reticuli (HIP 17440) Archived January 2, 2013, at the Wayback Machine.
- ↑ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 27 日