HD 213240

HD 213240
Observation data
Epoch J2000      Equinox J2000
Constellation Grus
Right ascension 22h 31m 00.36634s[1]
Declination −49° 25′ 59.7690″[1]
Apparent magnitude (V) 6.81[2]
Characteristics
Spectral type G0/G1V[3] + M5-5.5[4]
B−V color index 0.603±0.005[2]
Astrometry
Radial velocity (Rv)−0.37±0.12[1] km/s
Proper motion (μ) RA: −135.912 mas/yr[1]
Dec.: −193.844 mas/yr[1]
Parallax (π)24.4247 ± 0.0208 mas[1]
Distance133.5 ± 0.1 ly
(40.94 ± 0.03 pc)
Absolute magnitude (MV)3.77[2]
Details
Mass1.57±0.02[5] M☉
Radius1.56+0.03
−0.04[6] R☉
Luminosity2.687+0.007
−0.006[6] L☉
Surface gravity (log g)4.17±0.02[7] cgs
Temperature5,921+70
−58[6] K
Metallicity [Fe/H]0.14±0.01[2] dex
Rotational velocity (v sin i)3.5[8] km/s
Age4.6±0.6[7] Gyr
Other designations
CD−50° 13701, HD 213240, HIP 111143, SAO 231175, LTT 9047[9]
Database references
SIMBADdata

HD 213240 is a possible binary star[10] system in the constellation Grus. It has an apparent visual magnitude of 6.81,[2] which lies below the limit of visibility for normal human sight. The system is located at a distance of 133.5 light years from the Sun based on parallax. The primary has an absolute magnitude of 3.77.[2]

This is an ordinary G-type main-sequence star with a stellar classification of G0/G1V.[3] It is a metal-rich star with an age that has been calculated as being anywhere from 2.7 to 4.6 billion years.[10] The star has 1.6[5] times the mass of the Sun and 1.56[6] times the Sun's radius. It is spinning with a projected rotational velocity of 3.5 km/s.[8] The star is radiating 2.69[6] times the luminosity of the Sun from its photosphere at an effective temperature of 5,921 K.[6]

A red dwarf companion star was detected in 2005 with a projected separation of 3,898 AU.[10]

  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 e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Lodieu2014 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Stassun2017 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Bonfanti2016 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Delgado_Mena2015 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. ^ a b c Cite error: The named reference mugrauer was invoked but never defined (see the help page).