HD 220689

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HD 220689
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Aquarius
Right ascension 23h 25m 52.99170s[1]
Declination –20° 36′ 57.6998″[1]
Apparent magnitude (V) +7.74[2]
Characteristics
Spectral type G3V[3]
B−V color index +0.603±0.002[2]
Distance
153.1 ± 0.2 ly
(46.93 ± 0.05 pc)
Absolute magnitude (MV)4.50[2]
Details
Gyr
G 273-43[7]
Database references
Exoplanet Archive
data

HD 220689 is a single

light years from the Sun based on parallax, and is drifting further away with a radial velocity of +12 km/s.[1] A survey in 2015 has ruled out the existence of any additional stellar companions at projected distances from 26 to 305 astronomical units.[8]

The

luminosity of the Sun from its photosphere at an effective temperature of 5,921 K.[4]

Planetary system

From 1998 to 2012, the star was under observation from the CORALIE echelle spectrograph at

true mass of HD 220689 b were determined via astrometry.[11]

The HD 220689 planetary system[11]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(years) 		Eccentricity Inclination Radius
b 1.2+0.22
−0.11 MJ 		3.433+0.065
−0.064 		6.23+0.15
−0.14 		0.053+0.06
−0.037 		71+13
−18 or 109+18
−13° 		—

References

  1. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  2. ^
    S2CID 119257644
    .
  3. ^
    Bibcode:1988mcts.book.....H
    .
  4. ^
    S2CID 119099721
    . A175.
  5. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  6. ^
    S2CID 125765376
    . 111.
  7. ^ "HD 220689". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-01-02.
  8. ^
    hdl:1887/49340
    . Retrieved 19 June 2020.
  9. ^ "The astronomical magnitude scale". International Comet Quarterly. Retrieved 2020-12-31.
  10. S2CID 59467665
    .
  11. ^
    arXiv:2303.12409
    .

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=HD_220689&oldid=1193791528"