HD 169830

HD 169830
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Sagittarius
Right ascension 18h 27m 49.48500s[1]
Declination –29° 49′ 00.7008″[1]
Apparent magnitude (V) +5.90[2]
Characteristics
Spectral type F7V[3]
B−V color index 0.517±0.004[2]
Variable type “None”
Astrometry
Radial velocity (Rv)−17.271±0.0004[4] km/s
Proper motion (μ) RA: −0.341[1] mas/yr
Dec.: 16.103[1] mas/yr
Parallax (π)27.1461 ± 0.1469 mas[1]
Distance120.1 ± 0.7 ly
(36.8 ± 0.2 pc)
Absolute magnitude (MV)+3.08[2]
Details[5]
Mass1.4 M☉
Radius1.84 R☉
Luminosity4.63[6] L☉
Surface gravity (log g)4.06 cgs
Temperature6,300±50[6] K
Metallicity [Fe/H]0.15 dex
Rotation8.3 d[7]
Rotational velocity (v sin i)3.83 km/s
Age4.95[8] Gyr
Other designations
CD−29°14965, Gaia DR2 4048037707717866880, GC 25175, HD 169830, HIP 90485, HR 6907, SAO 186838, GSC 06869-01277, 2MASS J18274949-2949007[9]
Database references
SIMBADdata
ARICNSdata

HD 169830 is a star in the southern constellation of Sagittarius. It has a yellow-white hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.90.[2] The star is located at a distance of 120 light years from the Sun based on parallax. It is drifting closer with a radial velocity of −17.3 km/s,[4] and is predicted to come as close as 20.7 ly (6.4 pc) in 2.08 million years.[10] HD 169830 is known to be orbited by two large Jupiter-like exoplanets.

This is an F-type main-sequence star[6] with a stellar classification of F7V.[3] It is 3.83[8] billion years old and chromospherically inactive[8] with a slow rotation rate,[8] having a projected rotational velocity of 3.83 km/s.[5] This star is 40% more massive and 84% larger than the Sun. Combining the mass and radius makes the surface gravity only 41% that of the Sun. It is radiating 4.6[6] times the luminosity of the Sun from its photosphere at an effective temperature of 6,300 K.[6]

A candidate stellar companion, designated component B, lies at an angular separation of 11″ along a position angle of 265°.[11]

  1. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray_et_al_2006 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Fischer_Valenti_2005 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Naef2001 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Mayor2004 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Saffe_et_al_2005 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Bailer-Jones_et_al_2018 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Henry_et_al_2006 was invoked but never defined (see the help page).