HD 222582

HD 222582
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 23h 41m 51.5301s[1]
Declination –05° 59′ 08.729″[1]
Apparent magnitude (V) 7.685±0.005[2]
Characteristics
HD 222582A
Evolutionary stage Main sequence
Spectral type G5V[3]
B−V color index 0.648±0.002[4]
HD 222582B
Spectral type M4.5V[5]
Astrometry
Radial velocity (Rv)+12.020±0.0004[6] km/s
Proper motion (μ) RA: −145.492(29) mas/yr[1]
Dec.: −111.458(21) mas/yr[1]
Parallax (π)23.7955 ± 0.0238 mas[1]
Distance137.1 ± 0.1 ly
(42.02 ± 0.04 pc)
Absolute magnitude (MV)4.44±0.12[2]
Position (relative to HD 222582A)[5]
ComponentHD 222582B
Epoch of observation2018
Angular distance109.56±0.18″
Position angle299.52±0.03°
Projected separation4637±59 AU AU
Details
A
Mass0.993±0.035[7] M☉
Radius1.137±0.017[7] R☉
Luminosity1.302+0.005
−0.004[8] L☉
Surface gravity (log g)4.370±0.009[4] cgs
Temperature5,790±3[4] K
Metallicity [Fe/H]−0.005±0.003[4] dex
Rotational velocity (v sin i)1.74±0.12[9] km/s
Age6.7±0.3[4] Gyr
Ba+Bb
Mass0.2[10] M☉
Other designations
BD−06°6262, GC 32912, HD 222582, HIP 116906, SAO 146849, WDS J23419-0559A, NLTT 57682, 2MASS J23415154-0559086[11]
Database references
SIMBADdata
Planet
HD 222582 b Data Simbad
Data ExoPlanet

HD 222582 is a multiple star system in the equatorial constellation of Aquarius. It is invisible to the naked eye with an apparent visual magnitude of 7.7,[2] but can be viewed with binoculars or a small telescope.[12] The system is located at a distance of 137 light years from the Sun based on parallax,[1] and it is drifting further away with a radial velocity of +12 km/s.[6] It is located close enough to the ecliptic that it is subject to lunar occultations.[13]

The primary member of this system, designated component A, is an ordinary G-type main-sequence star with a stellar classification of G5V.[3] The physical properties of the star are similar enough to the Sun that it is considered a candidate solar twin.[14][4] It is about 6.5[9] billion years old with an inactive chromosphere[14] and is spinning with a low projected rotational velocity of 1.7 km/s.[9] The mass[7] and metallicity[4] of this star are essentially the same as the Sun. It has a 14% larger radius and is radiating 1.3 times the luminosity of the Sun from its photosphere at an effective temperature of 5,790 K.[4]

Component B of this system is a close binary[15][16] system with the components designated HD 222582 Ba and Bb. The pair have a combined class of M4.5 V+[5] and about 20% the mass of the Sun.[10]

  1. ^ a b c d e 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 mnras384_1_173 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk_Swift_1999 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h Cite error: The named reference Lorenzo-Oliveira_et_al_2018 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Montes2018 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Soto_Jenkins_2018 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference dosSantos2016 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference oepc was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference ICQ was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Richichi2003 was invoked but never defined (see the help page).
  14. ^ a b Cite error: The named reference Reddy_Lambert_2017 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Riddle2015 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Raghavan2006 was invoked but never defined (see the help page).