Kepler-182
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus[1] |
| Right ascension | 19h 19m 19.239s[2] |
| Declination | +50° 35′ 10.44″[2] |
| Apparent magnitude (V) | 14.9[3] |
| Characteristics | |
| Evolutionary stage | subgiant[2] |
| Spectral type | F3[4] |
| Astrometry | |
| Proper motion (μ) | RA: −7.566 mas/yr[2] Dec.: −7.217 mas/yr[2] |
| Parallax (π) | 0.6117±0.0167 mas[2] |
| Distance | 5,300 ± 100 ly (1,630 ± 40 pc) |
| Details[5] | |
| Mass | 1.07[3] M☉ |
| Radius | 1.43[3] R☉ |
| Luminosity | 2.21[3] L☉ |
| Surface gravity (log g) | 4.16[3] cgs |
| Temperature | 5,883[3] K |
| Metallicity [Fe/H] | 0.07[4] dex |
| Rotation | 44 days[6] |
| Rotational velocity (v sin i) | 3.6[6] km/s |
| Age | 5.0[6] Gyr |
| Other designations | |
| KOI-546, KIC 12058931, 2MASS J19191922+5035104 | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Kepler-182 is a star in the constellation of Cygnus. The star is notable for having two planets in the circumstellar habitable zone.[citation needed]
With a mass the same as the Sun's and an age of five billion years, Kepler-182 has exhausted its core hydrogen and expanded away from the main sequence. It is now a subgiant contracting towards the red giant branch. It has a radius of 1.4 R☉ and an effective temperature of 5,883 K, giving a bolometric luminosity of 2.2 L☉.[3]
Two exoplanets orbit it. The first, Kepler-182b, has a radius of 0.23 RJ and orbits the parent star every 9.8 days. The second, Kepler-182c, has a radius of 0.306 RJ and orbits the parent star every 20.7 days.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | — | 0.096 | 9.825792 ± 0.000062 | — | — | 0.23 ± 0.105 RJ |
| c | — | 0.157 | 20.684342 ± 0.000097 | — | — | 0.306 ± 0.136 RJ |
References
[edit]- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b c d e 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 c d e f g Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467.
- ^ a b Su, Tianhao; Zhang, Li-yun; Long, Liu; Misra, Prabhakar; Han, Xianming L.; Meng, Gang; Yang, Zilu; Pi, Qingfeng (2024). "Magnetic Activity of Millions of G-type Stars Based on the LAMOST DR10 Low-resolution Spectral and TESS Light-curve Surveys and the Future CSST Survey". The Astrophysical Journal Supplement Series. 271 (2): 60. Bibcode:2024ApJS..271...60S. doi:10.3847/1538-4365/ad2de3.
- ^ a b c Rowe, Jason F.; et al. (20 March 2014). "Validation of Kepler's Multiple Planet Candidates. III. Light Curve Analysis and Announcement of Hundreds of New Multi-planet Systems". The Astrophysical Journal. 784 (1): 45. arXiv:1402.6534. Bibcode:2014ApJ...784...45R. doi:10.1088/0004-637X/784/1/45. S2CID 119118620. 45.
- ^ a b c Tejada Arevalo, Roberto A.; Winn, Joshua N.; Anderson, Kassandra R. (2021). "Further Evidence for Tidal Spin-up of Hot Jupiter Host Stars". The Astrophysical Journal. 919 (2): 138. arXiv:2107.05759. Bibcode:2021ApJ...919..138T. doi:10.3847/1538-4357/ac1429.