Kepler-36
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 19h 25m 00.0428s[1] |
Declination | +49° 13′ 54.631″[1] |
Apparent magnitude (V) | 11.9 |
Characteristics | |
Spectral type | G1IV |
Astrometry | |
Proper motion ( | RA: 1.151(11) mas/yr[1] Dec.: −8.064(11) mas/yr[1] |
Parallax ( | 1.8528 ± 0.0087 mas[1] |
Distance | 1,760 ± 8 ly (540 ± 3 pc) |
Details | |
Mass | 1.071±0.043[2] M☉ |
Radius | 1.626±0.019[2] R☉ |
Surface gravity (log g) | 4.1±0.1[3] cgs |
Temperature | 5911±66[2] K |
Metallicity [Fe/H] | −0.2±0.06[2] dex |
Rotation | 17.20±0.2[2] |
Rotational velocity (v sin i) | 4.9±1.0[2] km/s |
Other designations | |
Database references | |
SIMBAD | data |
KIC | data |
Kepler-36 is a star in the constellation of Cygnus with two known planets. It has an anomalously large radius, meaning that it is a subgiant.
Planetary system
On June 21, 2012, the discovery of two planets orbiting the star was announced. The planets, a super-Earth and a "mini-Neptune", are unusual in that they have very close orbits; their semi-major axes differ by only 0.013
Companion (in order from star) |
Mass | Semimajor axis ( |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 3.83+0.11 −0.10 M🜨 |
0.1153 | 13.86821±0.00049 | <0.04 | 90.0° | 1.498+0.061 −0.049 R🜨 |
c | 7.13±0.18 M🜨 | 0.1283 | 16.21865±0.00010 | <0.04 | 90.0° | 3.679+0.096 −0.091 R🜨 |
References
- ^ a b c d 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 h i Carter, J. A.; et al. (2012). "Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities". Science. 337 (6094): 556–559. arXiv:1206.4718. Bibcode:2012Sci...337..556C. doi:10.1126/science.1223269. PMID 22722249. S2CID 40245894.
- ^ a b Vissapragada, Shreyas; et al. (2020). "Diffuser-assisted Infrared Transit Photometry for Four Dynamically Interacting Kepler Systems". The Astronomical Journal. 159 (3). 108. arXiv:1907.04445. Bibcode:2020AJ....159..108V. doi:10.3847/1538-3881/ab65c8. S2CID 195874295.
- ^ "Kepler-36". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-08-07.
- ^ Bodenheimer, P.; Stevenson, D.; Lissauer, J.; D'Angelo, G. (2018). "New Formation Models for the Kepler-36 System". The Astrophysical Journal. 868 (2): id. 138 (17 pp.). arXiv:1810.07160. Bibcode:2018ApJ...868..138B. doi:10.3847/1538-4357/aae928. S2CID 59055335.