HD 29587

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Stern
HD 29587
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Perseus
Right ascension 04 h 41 m 36.32 s
declination + 42 ° 07 ′ 6.5 ″
Apparent brightness 7.29 likes
Typing
Spectral class G2 V
Astrometry
Radial velocity (112.4 ± 0.1) km / s
parallax (36.27 ± 0.87)  mas
distance (90 ± 2)  ly
(27.6 ± 0.7)  pc  
Visual absolute brightness M vis +5.09 mag
Proper movement 
Rec. Share: (533.56 ± 0.99)  mas / a
Dec. portion: (−415.53 ± 0.91)  mas / a
Physical Properties
radius 0.9  R ☉
Effective temperature 5860  K
Other names
and catalog entries
Bonn survey BD + 41 ° 931
Henry Draper Catalog HD 29587 [1]
Hipparcos catalog HIP 21832 [2]
SAO catalog SAO 39690 [3]
Tycho catalog TYC 2901-64-1 [4]Template: Infobox star / maintenance / specification of the TYC catalog
Other names FK5 4419 • LHS 1696 • G 81-30
annotation
  1. ↑ Calculated from apparent brightness and distance.

HD 29587 is a main sequence star of the spectral class G2 in the constellation Perseus, about 90  light years away from Earth . With an apparent magnitude of 7.29 mag, it can no longer be seen with the naked eye, even under optimal observation conditions. The central star is orbited by a spectroscopic companion with the systematic designation HD 29587 B , which could be a cool star or a brown dwarf.

Spectroscopic companion

The companion HD 29587 B , discovered through fluctuations in the radial speed of the central star, has an orbital period of about 1500 days; the eccentricity of the orbit is estimated to be 0.36 ± 0.10. The mass of the object was determined to be about 0.039  solar masses .

Sources and individual references

  1. ↑ a b c Hipparcos catalog (ESA 1997)
  2. ↑ Pulkovo radial velocities for 35493 HIP stars
  3. ↑ a b c Hipparcos, the New Reduction (van Leeuwen, 2007)
  4. ↑ Halbwachs et al .: Exploring the brown dwarf desert with Hipparcos ; in: Astronomy and Astrophysics, Vol. 355, pp. 581ff. (2000), bibcode : 2000A & A ... 355..581H