<templatestyles src="Template:Sky/styles.css" />Coordinates: Sky map 23h 41m 51.5299s, −05° 59′ 08.726″

HD 222582

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Template:Short description

HD 222582
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) Script error: No such module "val".[3]
Characteristics
HD 222582A
Evolutionary stage Main sequence
Spectral type G5V[4]
B−V Template:Engvar Script error: No such module "val".[5]
HD 222582B
Spectral type M4.5V[6]
Astrometry
A
Radial velocity (Rv)Script error: No such module "val".[7] km/s
Proper motion (μ) RA: Script error: No such module "val". mas/yr[2]
Dec.: Script error: No such module "val". mas/yr[2]
Parallax (π)23.7955±0.0238 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)Script error: No such module "val".[3]
Position (relative to HD 222582A)[6]
ComponentHD 222582B
Epoch of observation2018
Angular distance109.56±0.18″
Position angle299.52±0.03°
Projected separationScript error: No such module "val". AU
Details
A
MassScript error: No such module "val".[8] Template:Solar mass
RadiusScript error: No such module "val".[8] Template:Solar radius
LuminosityScript error: No such module "val".[9] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[5] cgs
TemperatureScript error: No such module "val".[5] K
Metallicity [Fe/H]Script error: No such module "val".[5] dex
Rotational velocity (v sin i)Script error: No such module "val".[10] km/s
AgeScript error: No such module "val".[5] Gyr
Ba+Bb
Mass0.2[11] Template:Solar mass
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[12]
Database references
SIMBADdata
Planet
HD 222582 b Data Simbad
Data ExoPlanet

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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,[3] but can be viewed with binoculars or a small telescope.[13] The system is located at a distance of 137 light years from the Sun based on parallax,[2] and it is drifting further away with a radial velocity of +12 km/s.[7] It is located close enough to the ecliptic that it is subject to lunar occultations.[14]

Star system

The primary member of this system, designated component A, is an ordinary G-type main-sequence star with a stellar classification of G5V.[4] The physical properties of the star are similar enough to the Sun that it is considered a candidate solar twin.[15][5] It is about 6.5[10] billion years old with an inactive chromosphere[15] and is spinning with a low projected rotational velocity of 1.7 km/s.[10] The mass[8] and metallicity[5] 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.[5]

Component B of this system is a close binary[16][17] system with the components designated HD 222582 Ba and Bb. The pair have a combined class of M4.5 V+[6] and about 20% the mass of the Sun.[11]

Planetary system

In November 1999, a dense superjovian planet was announced orbiting the primary by the California and Carnegie Planet Search. Designated component 'b', it was discovered using the radial velocity method, using 24 observations over a period of 1.5 years. The exoplanet is orbiting with a period of Script error: No such module "convert". and a very large eccentricity of 0.76, ranging in distance from Script error: No such module "val". out to Script error: No such module "val". away from the primary.[18][19]

Template:OrbitboxPlanet begin Template:OrbitboxPlanet

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See also

References

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  1. ↑ Template:Cite constellation
  2. ↑ a b c d e Template:Cite Gaia DR3
  3. ↑ a b c Script error: No such module "Citation/CS1".
  4. ↑ a b Script error: No such module "Citation/CS1".
  5. ↑ a b c d e f g h Script error: No such module "Citation/CS1".
  6. ↑ a b c Script error: No such module "Citation/CS1".
  7. ↑ a b Script error: No such module "Citation/CS1".
  8. ↑ a b c Script error: No such module "Citation/CS1".
  9. ↑ Template:Cite Gaia DR2
  10. ↑ a b c Script error: No such module "Citation/CS1".
  11. ↑ a b Script error: No such module "citation/CS1".
  12. ↑ Template:Cite simbad
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Script error: No such module "Citation/CS1".
  15. ↑ a b Script error: No such module "Citation/CS1".
  16. ↑ Script error: No such module "Citation/CS1".
  17. ↑ Script error: No such module "Citation/CS1".
  18. ↑ Script error: No such module "citation/CS1".
  19. ↑ Script error: No such module "Citation/CS1".
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External links

  • Script error: No such module "citation/CS1".


Template:Stars of Aquarius

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