Kepler-43

Kepler-43, formerly known as KOI-135, is a star in the northern constellation of Cygnus. It is located at the celestial coordinates: Right Ascension 19^h 00^m 57.8034^s, Declination +46° 40′ 05.665″.^[7] With an apparent visual magnitude of 13.996,^[3] this star is too faint to be seen with the naked eye. The Kepler-43 has a very strong starspot activity.^[5]

Kepler-43

Observation data Epoch J2000      Equinox J2000
Constellation	Cygnus[1]
Right ascension	19h 00m 57.8034s[2]
Declination	+46° 40′ 05.666″[2]
Apparent magnitude (V)	13.96[3]
Characteristics
Spectral type	G0V~G0IV[4]
Astrometry
Proper motion (μ)	RA: −2.982(14) mas/yr[2] Dec.: 0.126(14) mas/yr[2]
Parallax (π)	0.9846 ± 0.0116 mas[2]
Distance	3,310 ± 40 ly (1,020 ± 10 pc)
Details
Mass	1.32±0.09[3] M☉
Radius	1.42±0.07[3] R☉
Luminosity	[3] L☉
Surface gravity (log g)	4.26±0.05[5] cgs
Temperature	6041±123[3] K
Metallicity [Fe/H]	0.33±0.11[3] dex
Rotation	12.851±0.053 days[6]
Rotational velocity (v sin i)	5.5±1.5[3] km/s
Other designations
Kepler-43, KOI-135, KIC 9818381
Database references
SIMBAD	data
KIC	data

Planetary system

The Kepler spacecraft detected a transiting planet candidate around this star that was confirmed by radial velocity measurements taken by the SOPHIE spectrograph mounted on the 1.93 m telescope at the Haute-Provence Observatory.^[8]

The planet nightside temperature was measured to be 2043⁺⁷⁹
₋₃₅₂ K.^[5]

The Kepler-43 planetary system^[4][5]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	3.23±0.19 MJ	0.0449	3.0240949±0.0000006	—	—	—

References

1. "Cygnus – constellation boundary", The Constellations, International Astronomical Union, retrieved 2011-12-15
2. 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. Kepler-43b, NASA Ames Research Center, archived from the original on 2015-09-14, retrieved 2011-12-06
4. Schneider, Jean, "Star: Kepler-43", Extrasolar Planets Encyclopaedia, archived from the original on 2014-03-04, retrieved 2011-12-06
5. Esteves, Lisa J.; Mooij, Ernst J. W. De; Jayawardhana, Ray (2014), "Changing Phases of Alien Worlds: Probing Atmospheres Ofkeplerplanets 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
6. McQuillan, A.; Mazeh, T.; Aigrain, S. (2013). "Stellar Rotation Periods of The Kepler objects of Interest: A Dearth of Close-In Planets Around Fast Rotators". The Astrophysical Journal Letters. 775 (1). L11. arXiv:1308.1845. Bibcode:2013ApJ...775L..11M. doi:10.1088/2041-8205/775/1/L11. S2CID 118557681.
7. "Kepler Discoveries". 2011-12-05. Archived from the original on 2010-05-27.
8. Bonomo, A. S.; et al. (2012). "SOPHIE velocimetry of Kepler transit candidates. V. The three hot Jupiters KOI-135b, KOI-204b, and KOI-203b (alias Kepler-17b)". Astronomy and Astrophysics. 538. A96. arXiv:1110.5462. Bibcode:2012A&A...538A..96B. doi:10.1051/0004-6361/201118323. S2CID 118528032.