Kepler-182

Last updated
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]

The Kepler-182 planetary system [5]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b—0.0969.825792 ± 0.000062——0.23 ± 0.105  RJ
c—0.15720.684342 ± 0.000097——0.306 ± 0.136  RJ

References

  1. ↑ 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.
  2. 1 2 3 4 5 6 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 3 4 5 6 7 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 .
  4. 1 2 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 .
  5. 1 2 3 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.
  6. 1 2 3 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 .
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