KELT-3

Last updated
KELT-3
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Leo Minor [1]
Right ascension 09h 54m 34.3869s [2]
Declination +40° 23′ 16.974″ [2]
Apparent magnitude  (V)9.82 ± 0.03 [3]
Characteristics
Evolutionary stage main sequence [2]
Spectral type F5IV-V [4]
Variable type planetary transit
Astrometry
Proper motion (μ)RA: −28.217(20) mas/yr [2]
Dec.: −24.068(22) mas/yr [2]
Parallax (π)4.7860±0.0272  mas [2]
Distance 681 ± 4  ly
(209 ± 1  pc)
Details [5]
Mass 1.301±0.046  M☉
Radius 1.583±0.036  R☉
Luminosity 3.04 [6]   L☉
Surface gravity (log g)4.153±0.024  cgs
Temperature 6306+36
−35  K
Metallicity [Fe/H]0.030+0.072
−0.066  dex
Age 3.0 ± 0.2 [6]   Gyr
Other designations
BD+41 2024, TYC 2996-683-1, 2MASS J09543439+4023170, GSC 02996-00683, SAO 43097
Database references
SIMBAD data
Exoplanet Archive data

KELT-3 is a star in the zodiac constellation Leo Minor. With an apparent magnitude of 9.82, it is too faint to be seen with the naked eye, but can be detected using a telescope. It is currently located around 681 light years away, based on parallax measurements.

Contents

Properties

KELT-3 is a late F-type main-sequence star with 27.7% more mass than the Sun, and is slightly larger than the latter. It is radiating 3 times the Sun's luminosity, and has a metallicity similar to the latter. It has an effective temperature of 6,304 K, which gives KELT-3 a yellow-white hue. It's also slightly younger than the Sun, with an age of 3 billion years. There is uncertainty about the star's age, it being an evolved star or not. [6]

Since 2015, the star is suspected to have a stellar companion, at angular separation of 3.762±0.009 arcseconds. [7]

Planetary system

In 2013, KELT discovered an eccentric hot Jupiter transiting the star. In the research paper, it is stated as one of the brightest transiting hosts. The light curves of the star have been observed during transits. [6]

The KELT-3 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 1.94±0.33 [8]   MJ 0.04120 ± 0.000672.70339020.20284.25° 1.458+0.042
−0.041 [5]   RJ

See also

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 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. ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000-03-01). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 –L30. Bibcode:2000A&A...355L..27H. ISSN   0004-6361.
  4. ↑ "Planet Kelt-3Ab" . Retrieved 2025-05-26.
  5. 1 2 Wang, Xian-Yu; Wang, Yong-Hao; Wang, Songhu; Wu, Zhen-Yu; Rice, Malena; Zhou, Xu; Hinse, Tobias C.; Liu, Hui-Gen; Ma, Bo; Peng, Xiyan; Zhang, Hui; Yu, Cong; Zhou, Ji-Lin; Laughlin, Gregory (2021), "Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves", The Astrophysical Journal Supplement Series, 255 (1): 15, arXiv: 2105.14851 , Bibcode:2021ApJS..255...15W, doi: 10.3847/1538-4365/ac0835 , S2CID   235253975
  6. 1 2 3 4 Pepper, Joshua; Siverd, Robert J.; Beatty, Thomas G.; Gaudi, B. Scott; Stassun, Keivan G.; Eastman, Jason; Collins, Karen; Latham, David W.; Bieryla, Allyson; Buchhave, Lars A.; Jensen, Eric L. N. (2013-08-01). "KELT-3b: A Hot Jupiter Transiting a V = 9.8 Late-F Star". The Astrophysical Journal. 773 (1): 64. arXiv: 1211.1031 . Bibcode:2013ApJ...773...64P. doi:10.1088/0004-637X/773/1/64. ISSN   0004-637X. S2CID   14691090.
  7. ↑ Wöllert, Maria; Brandner, Wolfgang (2015), "A Lucky Imaging search for stellar sources near 74 transit hosts", Astronomy & Astrophysics, 579: A129, arXiv: 1506.05456 , Bibcode:2015A&A...579A.129W, doi:10.1051/0004-6361/201526525, S2CID   118903879
  8. ↑ Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott (2016), "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes", The Astronomical Journal, 153 (3): 136, arXiv: 1609.04389 , Bibcode:2017AJ....153..136S, doi: 10.3847/1538-3881/aa5df3 , S2CID   119219062
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