HD 13189

HD 13189

HD 13189 as portrayed in Celestia.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Triangulum
Right ascension 02h 09m 40.1723s[1]
Declination +32° 18′ 59.161″[1]
Apparent magnitude (V) +7.57[2]
Characteristics
Spectral type K1II-III[3]
B−V color index 1.465±0.016[4]
Astrometry
Radial velocity (Rv)25.39[5] km/s
Proper motion (μ) RA: 2.306±0.024 mas/yr[1]
Dec.: 4.935±0.022 mas/yr[1]
Parallax (π)2.0450 ± 0.0240 mas[1]
Distance1,590 ± 20 ly
(489 ± 6 pc)
Absolute magnitude (MV)−0.3[6]
Details
Mass1.2[7] M☉
Radius38[8] R☉
Luminosity503[1] L☉
Surface gravity (log g)1.21[7] cgs
Temperature4,035[7] K
Metallicity [Fe/H]−0.18[7] dex
Age4.4[9] Gyr
Other designations
BD+31°370, HIP 10085, SAO 55309[10]
Database references
SIMBADdata

HD 13189 is a star with an orbiting companion in the northern constellation of Triangulum constellation. With an apparent visual magnitude of +7.57,[2] it is too faint to be visible to the normal human eye. The distance to this system is approximately 1,590 light years based on parallax measurements, and it is drifting further away with a radial velocity of 25.39 km/s.[5] In 2005, a planetary companion or brown dwarf was announced in orbit around this star.[2]

It has a spectral classification of K1II-III, making it a giant star that has evolved away from the main sequence after exhausting the hydrogen at its core. The mass is 1.2 times the Sun's, while measurements of the star's radius give estimates of 38 R☉. The atmosphere of the star displays short period radial velocity variations with a primary period of 4.89 days. This behavior is typical for giant K-type stars such as this and it is not the result of a close-orbit planetary companion.[11]

  1. ^ a b c d e Cite error: The named reference dr3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference aaa437_2_743 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference aaa529 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference aaa430_165 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference gontcharov2011 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference starhorse2 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference stassun2017 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference maldonado2016 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference jpcs118_1_012016 was invoked but never defined (see the help page).