Kepler 155
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 13m 58.9967 s[1] |
| Declination | +51° 04′ 55.0522″[1] |
| Characteristics | |
| Kepler-411 | |
| Evolutionary stage | main-sequence star |
| Spectral type | K3V |
| Apparent magnitude (G) | 14.24 |
| Kepler-411B | |
| Astrometry | |
| Radial velocity (Rv) | -11.6[2] km/s |
| Proper motion (μ) | RA: -5.294[3] mas/yr Dec.: -7.108[3] mas/yr |
| Parallax (π) | 3.4208 ± 0.0145[3] mas |
| Distance | 953 ± 4 ly (292 ± 1 pc) |
| Details[2] | |
| Mass | 0.542+0.053 −0.125 M☉ |
| Radius | 0.529+0.045 −0.135 R☉ |
| Luminosity | 0.062 L☉ |
| Surface gravity (log g) | 4.721+0.147 −0.027 cgs |
| Temperature | 4057+251 −64 K |
| Metallicity [Fe/H] | -0.33±0.11 dex |
| Rotation | 26.43 d |
| Age | 2.9+0.4 −0.3]] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Kepler 155 is a K-type star 957 light-years away.[4] In 2017, it was suspected to have a stellar companion 3.29 arcseconds away,[2] but it (Gaia EDR3 2133351698066483968) has the measured parallax of just 1.92±0.08 arcseconds according to Gaia data.[5]
Properties[edit]
Kepler 155 is a K-type star with 0.635 times the mass and 0.62 times the radius of the sun. It has a temperature of 4508 K.[6] Kepler 155 is not visible to the naked eye.[4] It metallicity is less than half to that of the sun, at Fe/H of -0.33.[2]
Planetary system[edit]
Kepler 155 has 2 planets confirmed in 2014,[7] one of which is in the habitable zone.[6] Kepler 155c orbits every 52.7 days,[4] at the inner edge of the habitable zone.[6] Kepler 155b, on the other hand, is too close to the star to be habitable.[6] Kepler 155c orbits a possibly slightly eccentric orbit at a distance where it receives an average 3% more radiation than Earth, resulting in planetary equilibrium temperature of 286 K.[2] The actual flux is uncertain though - another source in 2017 lists relative insolation of Kepler-155c as 1.28+0.26
−0.25.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| Kepler-155b | — | 0.0526+0.0022 −0.0031 |
5.9311924±0.0000042 | 0 | 89.88° | 1.73+0.28 −0.27 R⊕ |
| Kepler-155c | — | 0.2254+0.0092 −0.0139 |
52.66156±0.000111 | ≠0 | 89.495° | 1.97+0.19 −0.48 R⊕ |
References[edit]
- ↑ 1.0 1.1 1.2 "Kepler-155". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-05-12.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 VALIDATION OF SMALL KEPLER TRANSITING PLANET CANDIDATES IN OR NEAR THE HABITABLE ZONE, 2017, arXiv:1711.01267
- ↑ 3.0 3.1 3.2 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. Unknown parameter
|s2cid=ignored (help) Gaia EDR3 record for this source at VizieR. - ↑ 4.0 4.1 4.2 "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System.
- ↑ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. Unknown parameter
|s2cid=ignored (help) Gaia EDR3 record for this source at VizieR. - ↑ 6.0 6.1 6.2 6.3 "Open Exoplanet Catalogue - Kepler-155 c". www.openexoplanetcatalogue.com. Retrieved 2021-05-06.
- ↑ Rowe, Jason F.; Bryson, Stephen T.; Marcy, Geoffrey W.; Lissauer, Jack J.; Jontof-Hutter, Daniel; Mullally, Fergal; Gilliland, Ronald L.; Issacson, Howard; Ford, Eric; Howell, Steve B.; Borucki, William J.; Haas, Michael; Huber, Daniel; Steffen, Jason H.; Thompson, Susan E.; Quintana, Elisa; Barclay, Thomas; Still, Martin; Fortney, Jonathan; Gautier, T. N.; Hunter, Roger; Caldwell, Douglas A.; Ciardi, David R.; Devore, Edna; Cochran, William; Jenkins, Jon; Agol, Eric; Carter, Joshua A.; Geary, John (2014), "Validation Ofkepler's Multiple Planet Candidates. III. Light Curve Analysis and Announcement of Hundreds of New Multi-Planet Systems", The Astrophysical Journal, 784: 45, arXiv:1402.6534, doi:10.1088/0004-637X/784/1/45 Unknown parameter
|s2cid=ignored (help) - ↑ PLANETARY CANDIDATES OBSERVED BY Kepler. VIII. A FULLY AUTOMATED CATALOG WITH MEASURED COMPLETENESS AND RELIABILITY BASED ON DATA RELEASE 25, 2017, arXiv:1710.06758
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