HD 140913

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Star
HD 140913
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Northern crown
Right ascension 15 h 45 m 7.45 s
declination + 28 ° 28 ′ 11.8 ″
Apparent brightness 8.06 likes
Typing
Spectral class G0 V
Astrometry
Radial velocity (−20.1 ± 0.1) km / s
parallax (22.27 ± 0.82)  mas
distance (146.5 ± 5.4)  ly
(44.9 ± 1.7)  pc  
Visual absolute brightness M vis +4.80 mag
Proper movement 
Rec. Share: (−88.03 ± 0.42)  mas / a
Dec. portion: (39.04 ± 0.62)  mas / a
Physical Properties
Dimensions 1.11  M ☉
radius 1.09  R ☉
Effective temperature 5920  K
Other names
and catalog entries
Bonn survey BD + 28 ° 2469
Henry Draper Catalog HD 140913 [1]
Hipparcos catalog HIP 77152 [2]
SAO catalog SAO 83985 [3]
Tycho catalog TYC 2039-1016-1 [4]Template: Infobox star / maintenance / specification of the TYC catalog
annotation
  1. ↑ Calculated from apparent brightness and distance.

HD 140913 is a main sequence star of spectral class G0 in the constellation Northern Crown, about 156  light years from Earth . With an apparent magnitude of 8.08 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, which could be a cool star or a brown dwarf .

Spectroscopic companion

A spectroscopic companion is in an orbit with an eccentricity of 0.61 ± 0.03 around the central star. The period of rotation is (147.96 ± 0.06) days. The mass of the companion is estimated to be (0.17 ± 0.07)  M ☉ .

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
  5. ↑ Ribas, Ignasi; Jordi, Miralda-Escudé: The eccentricity-mass distribution of exoplanets: signatures of different formation mechanisms? ; in: Astronomy and Astrophysics, Vol. 464, Issue 2, pp. 779ff. (2007), bibcode : 2007A & A ... 464..779R