HD 38529
Double star HD 38529 |
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AladinLite | |||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | Orion | ||||||||||||
Right ascension | 05 h 46 m 34.91 s | ||||||||||||
declination | + 01 ° 10 ′ 5.5 ″ | ||||||||||||
Apparent brightness | 5.95 likes | ||||||||||||
Typing | |||||||||||||
Known exoplanets | 1 | ||||||||||||
B − V color index | +0.78 | ||||||||||||
U − B color index | +0.42 | ||||||||||||
Spectral class | G4 | ||||||||||||
Astrometry | |||||||||||||
Radial velocity | (+30.1 ± 0.2) km / s | ||||||||||||
parallax | (25.46 ± 0.40) mas | ||||||||||||
distance | (128 ± 2) ly (39.3 ± 0.6) pc |
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Visual absolute brightness M vis | approx. +3.0 mag | ||||||||||||
Proper movement | |||||||||||||
Rec. Share: | (−79.12 ± 0.48) mas / a | ||||||||||||
Dec. portion: | (−141.84 ± 0.35) mas / a | ||||||||||||
Physical Properties | |||||||||||||
Dimensions | approx. 1.4 M ☉ | ||||||||||||
radius | approx. 2.4 R ☉ | ||||||||||||
Luminosity |
approx. 6 L ☉ |
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Effective temperature | approx. 5700 K | ||||||||||||
Metallicity [Fe / H] | +0.31 | ||||||||||||
Age | approx. 5 bill. a | ||||||||||||
Other names and catalog entries |
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HD 38529 , also known as HR 1988 , is a star system in the Orion constellation . The main star, HD 38529 A , belongs to the spectral class G4 and has a mass of around 1.4 solar masses . It is orbited by at least two substellar objects, HD 38529 b and HD 38529 c , the former likely being an exoplanet and the latter a brown dwarf. At a distance of 284 "from the main component at a position angle of 305 ° is the HD 38529 B , a companion with common proper motion, which is a red dwarf of the spectral class M3.
HD 38529 b
HD 38529 b , also HD 38529 Ab , is an exoplanet orbiting the main star with an orbital period of 14.31 days . It was published in 2000 by Geoffrey Marcy et al. discovered using the radial velocity method; its minimum mass is 0.85 masses of Jupiter. Its orbit has a semi-major axis of approx. 0.13 astronomical units and an eccentricity of 0.25.
Web links
Individual evidence
- ↑ a b c Hipparcos catalog (ESA 1997)
- ↑ a b Bright Star Catalog
- ↑ Pulkovo radial velocities for 35493 HIP stars
- ↑ a b c Hipparcos, the New Reduction (van Leeuwen, 2007)