Kepler-429

Kepler-429 (KIC 10001893) is a variable subdwarf B star in the constellation Lyra, about 5,900 light years away.

Kepler-429

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Lyra[1]
Right ascension	19h 09m 33.4137s[2]
Declination	+46° 59′ 04.108″[2]
Apparent magnitude (V)	14.69 (var.)[3]
Characteristics
Evolutionary stage	Subdwarf B star
Spectral type	sdB[4]
Apparent magnitude (J)	16.36±0.10[4]
Variable type	V361 Hya[3]
Astrometry
Proper motion (μ)	RA: 1.133[2] mas/yr Dec.: −5.907[2] mas/yr
Parallax (π)	0.5573 ± 0.0372 mas[2]
Distance	5,900 ± 400 ly (1,800 ± 100 pc)
Details
Mass	0.47[5] M☉
Radius	0.24[5] R☉
Luminosity	3.54[6] L☉
Surface gravity (log g)	5.35[6] cgs
Temperature	27,500[5] K
Metallicity [Fe/H]	0.0[5] dex
Other designations
Gaia DR2 2130473176626619136, Kepler-429, KIC 10001893, 2MASS J19093340+4659041[4]
Database references
SIMBAD	data
Exoplanet Archive	data

The brightness of Kepler-429 changes unpredictably by up to 0.13 magnitudes.^[3] It has been classified as a V361 Hydrae variable, but also as a V1093 Herculis variable, which typically has slower variations and a cooler temperature. Over 100 pulsation modes were identified with periods from 256 seconds to over three hours.^[7]

Planetary system

Kepler-429 has been reported to have three possible exoplanets,^[8] though their existence is questioned.^[9] They were detected by orbital brightness modulation.^[10]

The KIC 10001893 planetary system^[11]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b (unconfirmed)	—	0.005541	0.21970	0[12]	—	—
c (unconfirmed)	—	0.007197	0.32528	0[13]	—	—
d (unconfirmed)	—	0.01324	0.81161	0[14]	—	—

See also

• Kepler-70

References

1. Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. Retrieved 2 January 2021.
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. Jayasinghe, T; Kochanek, C S; Stanek, K Z; Shappee, B J; Holoien, T W-S; Thompson, Toda A; Prieto, J L; Dong, Subo; Pawlak, M; Shields, J V; Pojmanski, G; Otero, S; Britt, C A; Will, D (1 July 2018). "The ASAS-SN catalogue of variable stars I: The Serendipitous Survey". Monthly Notices of the Royal Astronomical Society. 477 (3): 3145–3163. arXiv:1803.01001. Bibcode:2018MNRAS.477.3145J. doi:10.1093/mnras/sty838. ISSN 0035-8711.
4. "Kepler-429 -- Hot subdwarf". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2 January 2021.
5. Mathur, Savita; Huber, Daniel; Batalha, Natalie M.; Ciardi, David R.; Bastien, Fabienne A.; Bieryla, Allyson; Buchhave, Lars A.; Cochran, William D.; Endl, Michael; Esquerdo, Gilbert A.; Furlan, Elise; Howard, Andrew; Howell, Steve B.; Isaacson, Howard; Latham, David W.; MacQueen, Phillip J.; Silva, David R. (2017). "Revised Stellar Properties of Kepler Targets for the Q1-17 (DR25) Transit Detection Run". The Astrophysical Journal Supplement Series. 229 (2): 30. arXiv:1609.04128. Bibcode:2017ApJS..229...30M. doi:10.3847/1538-4365/229/2/30. S2CID 39426786.
6. Loyd, R. O. Parke; Shkolnik, Evgenya L.; Schneider, Adam C.; Richey-Yowell, Tyler; Barman, Travis S.; Peacock, Sarah; Pagano, Isabella (2020). "Current Population Statistics do Not Favor Photoevaporation over Core-powered Mass Loss as the Dominant Cause of the Exoplanet Radius Gap". The Astrophysical Journal. 890 (1): 23. arXiv:1912.12305. Bibcode:2020ApJ...890...23L. doi:10.3847/1538-4357/ab6605. S2CID 209516410.
7. Uzundag, M.; Baran, A. S.; Østensen, R. H.; Reed, M. D.; Telting, J. H.; Quick, B. K. (2017). "KIC 10001893: A pulsating SDB star with multiple trapped modes". Monthly Notices of the Royal Astronomical Society. 472 (1): 700. arXiv:1812.05675. Bibcode:2017MNRAS.472..700U. doi:10.1093/mnras/stx2011.
8. Silvotti, R.; Charpinet, S.; Green, E.; Fontaine, G.; Telting, J. H.; Østensen, R. H.; Van Grootel, V.; Baran, A. S.; Schuh, S.; Fox Machado, L. (2014). "Keplerdetection of a new extreme planetary system orbiting the subdwarf-B pulsator KIC 10001893". Astronomy & Astrophysics. 570: A130. arXiv:1409.6975. Bibcode:2014A&A...570A.130S. doi:10.1051/0004-6361/201424509. S2CID 46974308.
9. Blokesz, A.; et al. (July 2019). "Analysis of putative exoplanetary signatures found in light curves of two sdBV stars observed by Kepler". Astronomy & Astrophysics. 627: A86. arXiv:1906.03321. Bibcode:2019A&A...627A..86B. doi:10.1051/0004-6361/201835003. S2CID 182952925.
10. "Eyes On Exoplanets – Exoplanet Exploration: Planets Beyond our Solar System". exoplanets.nasa.gov. Retrieved 2023-12-21.
11. "KIC 10001893". NASA Exoplanet Archive. Retrieved 2 January 2021.
12. "Eyes On Exoplanets – Exoplanet Exploration: Planets Beyond our Solar System". exoplanets.nasa.gov. Retrieved 2023-12-21.
13. "Eyes on Exoplanets-KIC 10001893 c".
14. "Eyes on Exoplanets-KIC 10001893 d".