HD 183263

HD 183263
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 28m 24.571367s[1]
Declination +08° 21′ 29.004523″[1]
Apparent magnitude (V) 7.86[2]
Characteristics
Spectral type G2 IV[3]
B−V color index 0.678±0.012[2]
Astrometry
Radial velocity (Rv)−50.377±0.0005[4] km/s
Proper motion (μ) RA: −18.947±0.021 mas/yr[1]
Dec.: −32.190±0.017 mas/yr[1]
Parallax (π)18.3425 ± 0.0206 mas[1]
Distance177.8 ± 0.2 ly
(54.52 ± 0.06 pc)
Absolute magnitude (MV)4.16[2]
Details[5]
Mass1.121±0.052 M☉
Radius1.117±0.038 R☉
Luminosity2.04[2] L☉
Surface gravity (log g)4.403±0.060 cgs
Temperature5,936±44 K
Metallicity [Fe/H]0.302±0.030 dex
Rotation32 days[6]
Rotational velocity (v sin i)1.56±0.50 km/s
Age8.1[6] Gyr
Other designations
BD+08° 4109, HD 179791, HIP 95740, SAO 124664, PPM 167917, TYC 1055-3415-1, GSC 01055-03415[7]
Database references
SIMBADdata
Exoplanet Archivedata

HD 183263 is a star with a pair of orbiting exoplanets located in the equatorial constellation of Aquila. It has an apparent visual magnitude of 7.86,[2] which is too faint to be visible to the naked eye. The distance to this system is 178 light years based on parallax measurements, but it is drifting closer with a heliocentric radial velocity of −50 km/s.[4] Judging from its motion through space, this star is predicted to approach to within 32 light-years of the Sun in around 952,000 years.[8] At that distance, it will be faintly visible to the naked eye.[2]

This is an older star with a spectrum matching a stellar classification of G2 IV,[3] indicating it is about to leave the main sequence[6] after exhausting the supply of hydrogen at its core. It will then evolve into a red giant before dying as a white dwarf. This star has an absolute magnitude (apparent magnitude at 10 pc) of 4.16 compared to the Sun’s 4.83, which indicates the star is more luminous than the Sun, and therefore hotter by about 100 K. At the age of 8.1 billion years, the magnetic activity in its chromosphere is quiet and it is spinning slowly with a rotation period of 32 days.[6]

Planetary system

The star has two known super-jovian exoplanets in orbit around it. Exoplanet b was discovered in 2005[6] while exoplanet c was discovered in 2008.[9] A 2022 study estimated the true mass of HD 183263 c at about 9.31 MJ via astrometry, although this estimate is poorly constrained.[10]

The HD 183263 planetary system[5]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b ≥ 3.635±0.034 MJ 1.486±0.023 625.10±0.34 0.3728±0.0065 — —
c ≥ 6.90±0.12 MJ 5.69±0.11 4684±71 0.051±0.010 — —

See also

References

  1. ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b c d e f Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
  3. ^ a b McCuskey, S. W. (May 1949), "Stellar spectra in Milky Way regions. A region in Aquila", Astrophysical Journal, 109: 426, Bibcode:1949ApJ...109..426M, doi:10.1086/145146
  4. ^ a b Soubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv:1804.09370. Bibcode:2018A&A...616A...7S. doi:10.1051/0004-6361/201832795. S2CID 52952408.
  5. ^ a b Feng, Y. Katherina; et al. (2015). "The California Planet Survey IV: A Planet Orbiting the Giant Star HD 145934 and Updates to Seven Systems with Long-period Planets". The Astrophysical Journal. 800 (1). 22. arXiv:1501.00633. Bibcode:2015ApJ...800...22F. doi:10.1088/0004-637X/800/1/22. S2CID 56390823.
  6. ^ a b c d e Marcy, Geoffrey W.; et al. (2005). "Five New Extrasolar Planets". The Astrophysical Journal. 619 (1): 570–584. Bibcode:2005ApJ...619..570M. CiteSeerX 10.1.1.516.6667. doi:10.1086/426384. S2CID 5803173.
  7. ^ "HD 183263". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 7, 2018.
  8. ^ Bailer-Jones, C. A. L. (March 2015). "Close encounters of the stellar kind". Astronomy & Astrophysics. 575: 13. arXiv:1412.3648. Bibcode:2015A&A...575A..35B. doi:10.1051/0004-6361/201425221. S2CID 59039482. A35.
  9. ^ Wright, J. T.; et al. (2009). "Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems". The Astrophysical Journal. 693 (2): 1084–1099. arXiv:0812.1582. Bibcode:2009ApJ...693.1084W. doi:10.1088/0004-637X/693/2/1084. S2CID 18169921.
  10. ^ Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57. S2CID 251864022.


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