HD 154857
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Stern HD 154857 |
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| AladinLite | |||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | altar | ||||||||
| Right ascension | 17 h 11 m 15.72 s | ||||||||
| declination | -56 ° 40 ′ 50.9 ″ | ||||||||
| Apparent brightness | 7.24 likes | ||||||||
| Typing | |||||||||
| Known exoplanets | 1 | ||||||||
| Spectral class | G5 V | ||||||||
| Astrometry | |||||||||
| Radial velocity | (28.3 ± 0.3) km / s | ||||||||
| parallax | (15.57 ± 0.71) mas | ||||||||
| distance | (210 ± 10) ly (64 ± 3) pc |
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| Visual absolute brightness M vis | +3.20 mag | ||||||||
| Proper movement | |||||||||
| Rec. Share: | (87.14 ± 0.56) mas / a | ||||||||
| Dec. portion: | (−55.92 ± 0.46) mas / a | ||||||||
| Physical Properties | |||||||||
| Dimensions | 1.17 M ☉ | ||||||||
| radius | 2.42 R ☉ | ||||||||
| Effective temperature | 5445 K | ||||||||
| Metallicity [Fe / H] | −0.23 | ||||||||
| Age | 8.98 · 10 9 a | ||||||||
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Other names and catalog entries |
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HD 154857 is a yellow dwarf 223.45 light years from Earth with a right ascension of 17h 02m 36s and a declination of + 47 ° 04 '55 ". It has an apparent magnitude of 6.74 mag. In 2004, Chris McCarthy discovered an extrasolar planet orbiting this star, named HD 154857 b .
Web links
- SIMBAD (English)
- Encyclopedia of exoplanets (English)