HD 27894
Stern HD 27894 |
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AladinLite | |||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | network | ||||||||||
Right ascension | 04 h 20 m 47.05 s | ||||||||||
declination | -59 ° 24 ′ 39 ″ | ||||||||||
Apparent brightness | 9.36 likes | ||||||||||
Typing | |||||||||||
Known exoplanets | 1 | ||||||||||
Spectral class | K2 V | ||||||||||
Astrometry | |||||||||||
parallax | (22.79 ± 0.85) mas | ||||||||||
distance | (143 ± 5) ly (43.9 ± 1.6) pc |
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Visual absolute brightness M vis | approx. +6.2 mag | ||||||||||
Proper movement | |||||||||||
Rec. Share: | (+182.16 ± 0.89) mas / a | ||||||||||
Dec. portion: | (+271.77 ± 1.07) mas / a | ||||||||||
Physical Properties | |||||||||||
Dimensions | approx. 0.75 M ☉ | ||||||||||
Metallicity [Fe / H] | +0.30 ± 0.07 | ||||||||||
Age | approx. 4 billion a | ||||||||||
Other names and catalog entries |
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HD 27894 is a main sequence star of spectral class K2 in the constellation Reticulum (network), about 143 light years away . It has an apparent magnitude of 9.4 mag. The star is orbited by an exoplanet with an orbital period of around 18 days.
Planetary companion
The exoplanet HD 27894 b was discovered by Mayor et al. discovered using the radial velocity method and published in 2005. The orbit has a major semi-axis of approx. 0.12 astronomical units with a slight eccentricity . The minimum mass M · sin (i) of the object is 0.6 masses of Jupiter (approx. 200 earth masses ).
Web links
- Encyclopedia of the Extrasolar Planets
- The planet at Planet.ch ( Memento from October 15, 2012 in the Internet Archive )
Individual evidence
- ↑ a b c Hipparcos catalog (ESA 1997)
- ↑ a b c Hipparcos, the New Reduction (van Leeuwen, 2007)
- ↑ estimated from apparent brightness and distance