HD 222582

Coordinates: Sky map 23h 41m 51.5299s, −05° 59′ 08.726″
Source: Wikipedia, the free encyclopedia.
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]
Distance
137.1 ± 0.1 ly
(42.02 ± 0.04 pc)
Absolute magnitude (MV)4.44±0.12[2]
Position (relative to HD 222582A)[5]
ComponentHD 222582B
Projected separation
4637±59 AU AU
Details
A
Gyr
Ba+Bb
Mass0.2[10] M☉
NLTT 57682, 2MASS J23415154-0559086[11]
Database references
SIMBADdata
Planet
HD 222582 b Data Simbad
Data ExoPlanet

HD 222582 is a multiple

lunar occultations.[13]

The primary member of this system, designated component A, is an ordinary

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]

Planetary system

In November 1999, a dense

radial velocity method, using 24 observations over a period of 1.5 years. The exoplanet is orbiting with a period of 1.57 years and a very large eccentricity of 0.76, ranging in distance from 0.39 AU out to 2.31 AU away from the primary.[17][18]

The HD 222582 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 8.37[19] MJ 1.35 572 0.76 — —

See also

References

  1. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  2. ^
    doi:10.1111/j.1365-2966.2007.12671.x
    .
  3. ^
    Bibcode:1999MSS...C05....0H
    .
  4. ^
    S2CID 118995412
    . A73.
  5. ^
    S2CID 119260219
    .
  6. ^
    S2CID 52952408
    .
  7. ^
    S2CID 119107228
    . A76.
  8. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  9. ^
    S2CID 53533614
    . A156.
  10. ^ a b "HD 222582". Open Exoplanet Catalogue. Retrieved 2020-12-31.
  11. ^ "HD 222582". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-31.
  12. ^ "The astronomical magnitude scale". International Comet Quarterly. Retrieved 2020-12-31.
  13. doi:10.1051/0004-6361:20021585
    .
  14. ^
    S2CID 119232784
    . 151.
  15. S2CID 5642378
    .
  16. S2CID 5669768
    .
  17. ^ "Astronomers discover six new planets orbiting nearby stars" (Press release). Kamuela, Hawaii: W. M. Keck Observatory. November 1, 1999. Retrieved December 19, 2017.
  18. S2CID 119375519
    .
  19. ^ "HD 222582 b". Exoplanet Catalogue. NASA Astrophysics Division. 22 April 2019. Retrieved 2020-12-31.


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