HD 192699
| 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]
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]
| 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
[edit]References
[edit]- ^ a b c d e 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.
- ^ a b c d e f 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.
- ^ a b 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.
- ^ 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
- ^ 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.
- ^ "HD 192263". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 8, 2018.
- ^ 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.
- ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
- ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
- ^ 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
[edit]- "HIC 99894". webviz.u-strasbg.fr/.
- "New Words Atlas". planetquest1.jpl.nasa.gov. Archived from the original on 2009-04-13.
