HD 38529

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Double star
HD 38529
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
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  
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 ☉

Effective temperature approx. 5700  K
Metallicity [Fe / H] +0.31
Age approx. 5 bill.  a
Other names
and catalog entries
Bonn survey BD + 1 ° 1126
Bright Star Catalog HR 1988 [1]
Henry Draper Catalog HD 38529 [2]
Hipparcos catalog HIP 27253 [3]
SAO catalog SAO 113119 [4]
Tycho catalog TYC 116-1316-1 [5]Template: Infobox star / maintenance / specification of the TYC catalog
annotation
  1. ↑ estimated from apparent brightness and distance

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

  1. ↑ a b c Hipparcos catalog (ESA 1997)
  2. ↑ a b Bright Star Catalog
  3. ↑ Pulkovo radial velocities for 35493 HIP stars
  4. ↑ a b c Hipparcos, the New Reduction (van Leeuwen, 2007)