HD 192699

HD 192699 / Chechia
Observation data; Equinox J2000.0]] (ICRS)
Constellation	Aquila
Right ascension	20h 16m 06.00378s
Declination	+04° 34′ 50.8600″
Apparent magnitude (V)	6.44
Characteristics
Evolutionary stage	red giant branch
Spectral type	G8 IV
B−V color index	0.867±0.006
Astrometry
Proper motion (μ)	RA: −40.884 mas/yr ; Dec.: −51.962 mas/yr
Parallax (π)	13.7264 ± 0.0290 mas
Distance	237.6 ± 0.5 ly ; (72.9 ± 0.2 pc)
Absolute magnitude (MV)	2.36
Details
Mass	1.26±0.19 M☉
Radius	4.41±0.21 R☉
Luminosity	12.26 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
Database references
SIMBAD	data
Exoplanet Archive	data

Short description: Star in the constellation Aquila

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]

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 M_J	1.063±0.049	340.94±0.92	0.082±0.041	—	—

References

↑ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
↑ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
↑ ^3.0 ^3.1 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, doi:10.1088/0004-637X/725/1/721, Bibcode: 2010ApJ...725..721G.
↑ Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey (Ann Arbor, Michigan: Department of Astronomy, University of Michigan) 5, Bibcode: 1999MSS...C05....0H
↑ 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, doi:10.3847/0067-0049/225/2/32, Bibcode: 2016ApJS..225...32B.
↑ "HD 192263". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+192263.
↑ 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. doi:10.1086/519677. Bibcode: 2007ApJ...665..785J.
↑ "Approved names" (in en). http://www.nameexoworlds.iau.org/final-results.
↑ "International Astronomical Union | IAU". https://www.iau.org/news/pressreleases/detail/iau1912/.
↑ 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. doi:10.3847/1538-3881/aaf5d0. Bibcode: 2019AJ....157..149L.

External links

"HIC 99894". webviz.u-strasbg.fr/. http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HIC%2099894.
"New Words Atlas". planetquest1.jpl.nasa.gov. http://planetquest1.jpl.nasa.gov/atlas/atlas_search.cfm?&Sort=EarthDist&SortDir=DESC.

Coordinates: 20^h 16^m 06.0043^s, +04° 34′ 50.863″

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Original source: https://en.wikipedia.org/wiki/HD 192699. Read more

[Anderson2012-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.

[dr3-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.

[ghezzi2010-3] 3.0 ^3.1 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, doi:10.1088/0004-637X/725/1/721, Bibcode: 2010ApJ...725..721G.

[Houk1999-4] Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey (Ann Arbor, Michigan: Department of Astronomy, University of Michigan) 5, Bibcode: 1999MSS...C05....0H

[Brewer2016-5] 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, doi:10.3847/0067-0049/225/2/32, Bibcode: 2016ApJS..225...32B.

[SIMBAD-6] "HD 192263". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+192263.

[Johnson2007-7] 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. doi:10.1086/519677. Bibcode: 2007ApJ...665..785J.

[8] "Approved names" (in en). http://www.nameexoworlds.iau.org/final-results.

[9] "International Astronomical Union | IAU". https://www.iau.org/news/pressreleases/detail/iau1912/.

[Luhn2019-10] 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. doi:10.3847/1538-3881/aaf5d0. Bibcode: 2019AJ....157..149L.

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Observation data Equinox J2000.0]] (ICRS)
Constellation	Aquila^[1]
Right ascension	20^h 16^m 06.00378^s^[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^[2] mas/yr Dec.: −51.962^[2] mas/yr
Parallax (π)	13.7264 ± 0.0290^[2] mas
Distance	237.6 ± 0.5 ly (72.9 ± 0.2 pc)
Absolute magnitude (M_V)	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

Topic: Astronomy

See also

References

External links