Kepler-41
Kepler-41 or KOI-196 is a star in the constellation Cygnus. It is a G-type main-sequence star, like the Sun, and it is located about 3,68 light-years (1130 parsecs) away.[1] It is fairly similar to the Sun, with 115% of its mass, a radius of 129% times that of the Sun, and a surface temperature of 5,750 K.[3] Search for stellar companions to Kepler-41 in 2013-2014 has yielded inconclusive results, compatible with Kepler-41 being the single star.[5]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 38m 03.1746s[1] |
| Declination | +45° 58′ 53.877″[1] |
| Apparent magnitude (V) | 14.5[2] |
| Characteristics | |
| Spectral type | G2V[3] |
| Astrometry | |
| Radial velocity (Rv) | −27.066±0.008[3] km/s |
| Proper motion (μ) | RA: 3.037±0.041[1] mas/yr Dec.: 2.999±0.046[1] mas/yr |
| Parallax (π) | 0.8864 ± 0.0224 mas[1] |
| Distance | 3,680 ± 90 ly (1,130 ± 30 pc) |
| Details[3] | |
| Mass | 1.15±0.04 M☉ |
| Radius | 1.29±0.02 R☉ |
| Surface gravity (log g) | 4.278±0.005 cgs |
| Temperature | 5750±100 K |
| Metallicity [Fe/H] | 0.38±0.11 dex |
| Rotational velocity (v sin i) | 6±2 km/s |
| Age | 4.4+1.3 −1.1 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Planetary system
In 2011, the planet Kepler-41b was discovered in orbit around the star. The planet orbits extremely close to Kepler-41, completing an orbit once every 1.86 days. Despite it receiving a high amount of radiation from Kepler-41, the radius of the Kepler-41b was initially believed to be less than that of Jupiter making it unusual for a hot Jupiter however later observations showed an inflated radius similar to other hot jupiters.[3] Kepler-41b is also quite reflective, with a geometric albedo of 0.30.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.56±0.08 MJ | 0.03101±0.0004 | 1.85555820±0.00000052 | 0 (fixed) | 82.51±0.09° | 1.29±0.02 RJ |
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- "Notes on Kepler-41 b". Archived from the original on 9 October 2020. Retrieved 21 January 2017.
- Bonomo, A. S.; et al. (2015). "Improved parameters of seven Kepler giant companions characterized with SOPHIE and HARPS-N". Astronomy and Astrophysics. 575. A85. arXiv:1501.02653. Bibcode:2015A&A...575A..85B. doi:10.1051/0004-6361/201323042. S2CID 119230291.
- "KOI-952". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 January 2017.
- Esteves, Lisa J.; Mooij, Ernst J. W. De; Jayawardhana, Ray (2014), "Changing Phases of Alien Worlds: Probing Atmospheres Of Kepler Planets with High-Precision Photometry", The Astrophysical Journal, 804 (2): 150, arXiv:1407.2245, Bibcode:2015ApJ...804..150E, doi:10.1088/0004-637X/804/2/150, S2CID 117798959
- Santerne, A.; et al. (2011). "SOPHIE velocimetry of Kepler transit candidates IV. KOI-196b: a non-inflated hot Jupiter with a high albedo". Astronomy and Astrophysics. 536. A70. arXiv:1108.0550. Bibcode:2011A&A...536A..70S. doi:10.1051/0004-6361/201117807. S2CID 119025355.