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Kepler-385

Kepler-385
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus[1]
Right ascension 19h 37m 21.23819s[2]
Declination +50° 20′ 11.5477″[2]
Apparent magnitude (V) 15.76[3]
Astrometry
Proper motion (μ) RA: 2.738 mas/yr[2]
Dec.: -5.398 mas/yr[2]
Parallax (π)0.6597 ± 0.0183 mas[2]
Distance4,900 ± 100 ly
(1,520 ± 40 pc)
Details[4]
Mass0.99±0.03 M☉
Radius1.09±0.05 R☉
Surface gravity (log g)4.19±0.10 cgs
Temperature5835±64 K
Metallicity [Fe/H]0.010±0.037 dex
Other designations
Kepler-385, KOI-2433, KIC 11968463, TIC 27082352, 2MASS J19372123+5020115[5]
Database references
SIMBADdata

Kepler-385 (also designated KOI-2433) is an F-type main-sequence star located about 4,900 light-years (1,500 parsecs) away from Earth in the constellation of Cygnus. The star is 10% larger and 5% hotter than the Sun. The star has at least three, and potentially up to seven, exoplanets discovered orbiting it.[6][7]

The star has a mass of 1.05 solar masses, a radius of 1.157 solar radii, a temperature of 5829 Kelvin and a luminosity of 1.39 times the solar luminosity.[3]

Planetary system

Kepler-385 was observed by the Kepler space telescope, which initially detected a total of seven planet candidates. Two of these, KOI-2433.01 & .02, were confirmed in 2014 as Kepler-385 b & c,[8] and a third, KOI-2433.03, was confirmed in 2020 as Kepler-385 d.[9] These confirmations were part of studies using statistical validation to confirm large numbers of Kepler candidates. The candidate KOI-2433.05 was shown to be a false positive.[4]

In 2023, a new updated catalog of Kepler candidates was presented, including an eighth candidate around Kepler-385, KOI-2433.08, making it a candidate seven-planet system.[4][6] Kepler-385 is tied with Kepler-90 - a confirmed eight-planet system - as the Kepler system with the most planet candidates.

The Kepler-385 planetary system[3][4]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
.08 (unconfirmed) — — 3.37376±0.00003 — — 1.206+0.110
−0.101 R🜨
.06 (unconfirmed) — 0.067 6.06325±0.00006 — — 1.441+0.129
−0.106 R🜨
b — 0.097 10.04381±0.00008 — — 2.313+0.210
−0.162 R🜨
c — 0.127 15.16213±0.00014 — — 2.406+0.549
−0.146 R🜨
.04 (unconfirmed) — 0.189 27.90426±0.00040 — — 1.903+0.184
−0.142 R🜨
d — 0.302 56.41581±0.00135 — — 2.423+0.210
−0.161 R🜨
.07 (unconfirmed) — 0.402 86.43086±0.00205 — — 2.252±0.199 R🜨

References

  1. ^ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
  2. ^ a b c d 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. ^ a b c "Kepler-385 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2023-11-07.
  4. ^ a b c d Lissauer, Jack J.; Rowe, Jason F.; et al. (2024). "Updated Catalog of Kepler Planet Candidates: Focus on Accuracy and Orbital Periods". The Planetary Science Journal. 5 (6): 152. arXiv:2311.00238. doi:10.3847/PSJ/ad0e6e. Data is available here.
  5. ^ "Kepler-385". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 November 2023.
  6. ^ a b "Scorching, Seven-Planet System Revealed by New Kepler Exoplanet List - NASA". 2023-11-02. Retrieved 2023-11-07.
  7. ^ Anderson, Natali (2023-11-06). "Kepler-385 Hosts Seven Large Exoplanets, Astronomers Say | Sci.News". Sci.News: Breaking Science News. Retrieved 2023-11-07.
  8. ^ Rowe, Jason F.; Bryson, Stephen T.; et al. (March 2014). "Validation of Kepler's Multiple Planet Candidates. III. Light Curve Analysis and Announcement of Hundreds of New Multi-planet Systems". The Astrophysical Journal. 784 (1): 45. arXiv:1402.6534. Bibcode:2014ApJ...784...45R. doi:10.1088/0004-637X/784/1/45.
  9. ^ Armstrong, David J.; Gamper, Jevgenij; Damoulas, Theodoros (July 2021). "Exoplanet validation with machine learning: 50 new validated Kepler planets". Monthly Notices of the Royal Astronomical Society. 504 (4): 5327–5344. arXiv:2008.10516. Bibcode:2021MNRAS.504.5327A. doi:10.1093/mnras/staa2498.
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