HD 192699

Last updated
HD 192699 / Chechia
Observation data
Epoch J2000       Equinox J2000
Constellation Aquila [1]
Right ascension 20h 16m 06.00378s [2]
Declination +04° 34′ 50.8600″ [2]
Apparent magnitude  (V)6.44 [1]
Characteristics
Evolutionary stage red giant branch [3] [2]
Spectral type G8 IV [4]
B−V color index 0.867±0.006 [1]
Astrometry
Proper motion (μ)RA: −40.884 mas/yr [2]
Dec.: −51.962 mas/yr [2]
Parallax (π)13.7264±0.0290  mas [2]
Distance 237.6 ± 0.5  ly
(72.9 ± 0.2  pc)
Absolute magnitude  (MV)2.36 [1]
Details [5]
Mass 1.26±0.19  M☉
Radius 4.41±0.21  R☉
Luminosity 12.26 [1]   L☉
Surface gravity (log g)3.25  cgs
Temperature 5,041  K
Metallicity [Fe/H]−0.12  dex
Age 3.2+1.2
−0.7  Gyr
Other designations
Chechia, BD+04°4395, FK5 3623, HD 192699, HIP 99894, HR 7288, SAO 125628, TYC 504-2358-1, GSC 00504-02358, 2MASS J20160600+0434509 [6]
Database references
SIMBAD data
Exoplanet Archive data

HD 192699 is a star located approximately 238 light-years away in the constellation of Aquila. It has the apparent magnitude of 6.45. Based on its mass of 1.68 solar, it was an A-type star when it was a main-sequence. In April 2007, a planet was announced orbiting the star, together with HD 175541 b and HD 210702 b. [7]

Contents

Although the published spectral class of G8 IV suggests that HD 192699 is a subgiant, models of the star suggest it has reached the base of the red giant branch, having developed a degenerate helium core. [2] [3]

The star HD 192699 is named Chechia. The name was selected in the NameExoWorlds campaign by Tunisia, during the 100th anniversary of the IAU. Chechia is a flat-surfaced, traditional red wool hat. [8] [9]

The HD 192699 planetary system [10]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b / Khomsa ≥2.096±0.093  MJ 1.063±0.049340.94±0.920.082±0.041——

See also

References

  1. 1 2 3 4 5 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.
  2. 1 2 3 4 5 6 7 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.
  3. 1 2 Ghezzi, L.; Cunha, K.; Schuler, S. C.; Smith, V. V. (2010), "Metallicities of Planet-hosting Stars: A Sample of Giants and Subgiants", The Astrophysical Journal, 725 (1): 721, arXiv: 1008.3539 , Bibcode:2010ApJ...725..721G, doi:10.1088/0004-637X/725/1/721.
  4. ↑ Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Ann Arbor, Michigan: Department of Astronomy, University of Michigan, Bibcode:1999MSS...C05....0H
  5. ↑ Brewer, John M.; et al. (2016), "Spectral Properties of Cool Stars: Extended Abundance Analysis of 1,617 Planet-Search Stars", The Astrophysical Journal Supplement Series, 225 (2): 32, arXiv: 1606.07929 , Bibcode:2016ApJS..225...32B, doi: 10.3847/0067-0049/225/2/32 , S2CID   118507965.
  6. ↑ "HD 192263". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved November 8, 2018.
  7. ↑ Johnson, John Asher; et al. (2007). "Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants". The Astrophysical Journal. 665 (1): 785–793. arXiv: 0704.2455 . Bibcode: 2007ApJ...665..785J . doi: 10.1086/519677 .
  8. ↑ "Approved names". NameExoworlds. Retrieved 2020-01-02.
  9. ↑ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
  10. ↑ Luhn, Jacob K.; et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal. 157 (4). 149. arXiv: 1811.03043 . Bibcode:2019AJ....157..149L. doi: 10.3847/1538-3881/aaf5d0 . S2CID   102486961.
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