HD 210277

HD 210277
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 09m 29.8658s[1]
Declination −07° 32′ 55.162″[1]
Apparent magnitude (V) 6.54[2]
Characteristics
Spectral type G8V[3] or G8/K0V[4]
U−B color index 0.43
B−V color index 0.773
Astrometry
Radial velocity (Rv)−20.855±0.0003[5] km/s
Proper motion (μ) RA: 85.407(29) mas/yr[1]
Dec.: −450.617(23) mas/yr[1]
Parallax (π)46.8515 ± 0.0283 mas[1]
Distance69.61 ± 0.04 ly
(21.34 ± 0.01 pc)
Absolute magnitude (MV)4.90±0.05[6]
Details[7]
Mass1.007+0.040
−0.039 M☉
Radius1.087+0.015
−0.016 R☉
Luminosity1.002[8] L☉
Surface gravity (log g)4.369±0.020 cgs
Temperature5,705±35 K
Metallicity [Fe/H]0.170±0.097 dex
Rotation40.8 d[9]
Rotational velocity (v sin i)1.888±0.158 km/s
Age6.471+1.744
−1.643[7]
8.929±2.671[2] Gyr
Other designations
BD−08°5818, GJ 9769, HD 210277, HIP 109378, SAO 145906, PPM 206033, LTT 8887, NLTT 53073, GCRV 13920, 2MASS J22092985-0732548[10]
Database references
SIMBADdata
ARICNSdata

HD 210277 is a single[9] star in the equatorial constellation of Aquarius. It has an apparent visual magnitude of 6.54,[2] which makes it a challenge to view with the naked eye, but it is easily visible in binoculars. The star is located at a distance of 69.6 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −20.9 km/s.[5]

An early classification of this star was a G0 dwarf,[11] and some sources still use this value.[12] More modern classification surveys list it as G8V,[3] matching a late G-type main-sequence star.[9] It is older than the Sun with a very low level of chromospheric activity[3] and is spinning with a projected rotational velocity of 1.9 km/s. The star has a slightly higher mass and larger radius than the Sun.[7]

  1. ^ a b c d Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Delgado_Mena_et_al_2019 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Gray_et_al_2003 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Houk_Swift_1999 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Gonzalez1999 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Soto_Jenkins2018 was invoked but never defined (see the help page).
  8. ^ Krivov, A. V.; Eiroa, C.; Löhne, T.; Marshall, J. P.; Montesinos, B.; Del Burgo, C.; Absil, O.; Ardila, D.; Augereau, J.-C.; Bayo, A.; Bryden, G.; Danchi, W.; Ertel, S.; Lebreton, J.; Liseau, R.; Mora, A.; Mustill, A. J.; Mutschke, H.; Neuhäuser, R.; Pilbratt, G. L.; Roberge, A.; Schmidt, T. O. B.; Stapelfeldt, K. R.; Thébault, Ph.; Vitense, Ch.; White, G. J.; Wolf, S. (2013), "HERSCHEL's "COLD DEBRIS DISKS": BACKGROUND GALAXIES OR QUIESCENT RIMS OF PLANETARY SYSTEMS?", The Astrophysical Journal, 772 (1): 32, arXiv:1306.2855, Bibcode:2013ApJ...772...32K, doi:10.1088/0004-637X/772/1/32, S2CID 11877636
  9. ^ a b c Cite error: The named reference Marcy1999 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 Cannon_Pickering1993 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Funk_et_al_2012 was invoked but never defined (see the help page).