HD 192699

HD 192699 is a yellow subgiant star located approximately 214 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.^[6]

HD 192699 / Chechia

Observation data Epoch J2000      Equinox J2000
Constellation	Aquila
Right ascension	20h 16m 06.00415s[1]
Declination	+04° 34′ 50.8613″[1]
Apparent magnitude (V)	6.44[2]
Characteristics
Spectral type	G8 IV[3]
B−V color index	0.867±0.006[2]
Astrometry
Proper motion (μ)	RA: −41.239[1] mas/yr Dec.: −52.035[1] mas/yr
Parallax (π)	13.8868 ± 0.0513 mas[1]
Distance	234.9 ± 0.9 ly (72.0 ± 0.3 pc)
Absolute magnitude (MV)	2.36[2]
Details[4]
Mass	1.26±0.19 M☉
Radius	4.41±0.21 R☉
Luminosity	12.26[2] 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[5]
Database references
SIMBAD	data

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.^[7][8]

The HD 192699 planetary system^[9]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b / Khomsa	≥2.096±0.093 MJ	1.063±0.049	340.94±0.92	0.082±0.041	—	—

See also

• HD 175541
• HD 210702
• List of extrasolar planets

References

1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
2. 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. 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
4. 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.
5. "HD 192263". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 8, 2018.
6. 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.
7. "Approved names". NameExoworlds. Retrieved 2020-01-02.
8. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
9. 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.

External links

• "HIC 99894". webviz.u-strasbg.fr/.
• "New Words Atlas". planetquest1.jpl.nasa.gov. Archived from the original on 2009-04-13.