HD 8673

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Star
HD 8673
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Andromeda
Right ascension 01 h 26 m 8.79 s
declination + 34 ° 34 ′ 46.9 ″
Apparent brightness 6.34 mag
Typing
B − V color index +0.47 
U − B color index +0.01 
Spectral class F7 V
Astrometry
Radial velocity (+17.1 ± 0.5) km / s
parallax (27.73 ± 0.40)  mas
distance (118 ± 2)  ly
(36.1 ± 0.5)  pc  
Visual absolute brightness M vis approx. +3.6 mag
Proper movement 
Rec. Share: (+237.19 ± 0.33)  mas / a
Dec. portion: (−84.64 ± 0.25)  mas / a
Physical Properties
radius approx. 1.6  R ☉
Effective temperature 6280  K
Rotation time 14.4 hours
Other names
and catalog entries
Bonn survey BD + 33 ° 228
Bright Star Catalog HR 410 [1]
Henry Draper Catalog HD 8673 [2]
Hipparcos catalog HIP 6702 [3]
SAO catalog SAO 54695 [4]
Tycho catalog TYC 2300-1642-1 [5]Template: Infobox star / maintenance / specification of the TYC catalog
Other names IRAS 01232 + 3418
annotation
  1. ↑ estimated with apparent magnitude and distance

HD 8673 is a sun-like star in the constellation Andromeda, about 120  light-years away from Earth . Its apparent magnitude is 6.3 mag. HD 8673 has at least one companion.

Possible companion

In 2001, Brian Mason resolved a close companion at HD 8673 with the help of speckle interferometry at an angular distance of 0 ″, 1 (approx. 3.8  AU ). This object could be a close companion star; however, this observation has not yet been confirmed (as of March 2010).

As part of a planetary search program at the Tautenburg State Observatory, a companion was found by observing the radial velocity of HD 8673, which orbits the star with a period of 639 days and for which a minimum mass of about 14  Jupiter masses and a major semi-axis of 1, 6 AU results. This object could therefore be a brown dwarf or a massive exoplanet.

It would be possible that the two aforementioned observations refer to the same object. In this case, the observations would point to a low-mass companion star with a low orbit inclination (i ≤ 10 °).

Web links

swell

  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)
  • Raghavan et al .: Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems ; in: The Astrophysical Journal, Vol. 646, No. 1, pp. 523ff. (2006), bibcode : 2006ApJ ... 646..523R