HD 101930

HD 101930
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 11h 43m 30.11338s[1]
Declination –58° 00′ 24.7787″[1]
Apparent magnitude (V) 8.21[2]
Characteristics
Spectral type K2 V+[3]
B−V color index +0.91[4]
Astrometry
Radial velocity (Rv)+18.36[5] km/s
Proper motion (μ) RA: +16.680 mas/yr[1]
Dec.: +349.125 mas/yr[1]
Parallax (π)33.3814 ± 0.0180 mas[1]
Distance97.71 ± 0.05 ly
(29.96 ± 0.02 pc)
Absolute magnitude (MV)+5.88[2]
Details
Mass0.82[6] M☉
Radius0.87+0.05
−0.04[7] R☉
Luminosity0.43±0.01[8] L☉
Surface gravity (log g)4.40±0.11[9] cgs
Temperature5,079±62[5] K
Metallicity [Fe/H]+0.1±0.03[10] dex
Rotational velocity (v sin i)2[11] km/s
Age5.4±4.4[8] Gyr
Other designations
CD-57°4096, GJ 3683, HIP 57172, LTT 4350, NLTT 28356, SAO 239322[12]
Database references
SIMBADdata
ARICNSdata

HD 101930, also known as Gliese 3683, is an orange hued star with an orbiting exoplanet located in the southern constellation Centaurus. It has an apparent magnitude of 8.21,[2] making it faintly visible in binoculars but not to the naked eye. The system is located relatively close at a distance of 98 light years[1] but is receding with a heliocentric radial velocity of 18.4 km/s.[5] It has a relatively large proper motion, traversing the celestial sphere with an angular velocity of 0.320″·yr−1.[13]

HD 101930 has a stellar classification of K2 V+,[3] indicating that it is an ordinary K-type main-sequence star. It has a current mass of 0.82 M☉[6] and is said to be 5.4 billion years old,[8] which is slightly older than the Sun. The object has 87% the radius of the Sun[7] and an effective temperature of 5,079 K.[5] When combined, these parameters yield a luminosity 43% that of the Sun from its photosphere.[8] As expected with planetary hosts, HD 101930 is metal enriched, having a metallicity 26% above solar levels.[10] The star's projected rotational velocity is similar to the Sun's, having a value of 2 km/s.[11]

A 2007 multicity survey found a co-moving companion located 73″ away,[14] making it a binary star. It has a class of M0-1[15] and a mass of 0.7 M☉.[14]

  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 Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Cousins1963 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Lovis2005 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Turnbull2015 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Bonfanti2015 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Sousa2008 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Tsantaki2014 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference LDA2021 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Luyten_1979 was invoked but never defined (see the help page).
  14. ^ a b Cite error: The named reference Mugrauer2007 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Lindgren2016 was invoked but never defined (see the help page).