Kepler-80

Kepler-80
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 44m 27.0201s[1]
Declination 39° 58′ 43.594″[1]
Apparent magnitude (V) 14.804
Characteristics
Spectral type M0V[2]
Variable type planetary transit
Astrometry
Proper motion (μ) RA: −1.373(20) mas/yr[1]
Dec.: −7.207(24) mas/yr[1]
Parallax (π)2.6675 ± 0.0183 mas[1]
Distance1,223 ± 8 ly
(375 ± 3 pc)
Details
Mass0.730 M☉
Radius0.678 R☉
Luminosity0.170 L☉
Temperature4540 K
Metallicity [Fe/H]−0.56 [3] dex
Rotation25.567±0.252 days[4]
Other designations
KOI-500, KIC 4852528, 2MASS J19442701+3958436[2]
Database references
SIMBADdata
KICdata

Kepler-80, also known as KOI-500, is a red dwarf star of the spectral type M0V.[2] This stellar classification places Kepler-80 among the very common, cool, class M stars that are still within their main evolutionary stage, known as the main sequence. Kepler-80, like other red dwarf stars, is smaller than the Sun, and it has both radius, mass, temperatures, and luminosity lower than that of our own star.[5] Kepler-80 is found approximately 1,223 light years from the Solar System, in the stellar constellation Cygnus, also known as the Swan.

The Kepler-80 system has 6 known exoplanets.[6][7] The discovery of the five inner planets was announced in October 2012, marking Kepler-80 as the first star identified with five orbiting planets.[8][5] In 2017, an additional planet, Kepler-80g, was discovered by use of artificial intelligence and deep learning to analyse data from the Kepler space telescope.[7] The method used to discover Kepler-80g had been developed by Google, and during the same study another planet was found, Kepler-90i, which brought the total number of known planets in Kepler-90 up to 8 planets.[9]

  1. ^ a b c d Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Simbad was invoked but never defined (see the help page).
  3. ^ "OASIS". Abstractsonline.com. Retrieved 2012-11-22.
  4. ^ Cite error: The named reference McQuillan2013 was invoked but never defined (see the help page).
  5. ^ a b MacDonald, Mariah G.; Ragozzine, Darin; Fabrycky, Daniel C.; Ford, Eric B.; Holman, Matthew J.; Isaacson, Howard T.; Lissauer, Jack J.; Lopez, Eric D.; Mazeh, Tsevi (October 2016). "A Dynamical Analysis of the Kepler-80 System of Five Transiting Planets". The Astronomical Journal. 152 (4): 105. arXiv:1607.07540. Bibcode:2016AJ....152..105M. doi:10.3847/0004-6256/152/4/105. ISSN 1538-3881. S2CID 119265122.
  6. ^ Xie, J.-W. (2013). "Transit timing variation of near-resonance planetary pairs: confirmation of 12 multiple-planet systems". Astrophysical Journal Supplement Series. 208 (2): 22. arXiv:1208.3312. Bibcode:2013ApJS..208...22X. doi:10.1088/0067-0049/208/2/22. S2CID 17160267.
  7. ^ a b Shallue, C. J.; Vanderburg, A. (2017). "Identifying Exoplanets With Deep Learning: A Five Planet Resonant Chain Around Kepler-80 And An Eighth Planet Around Kepler-90" (PDF). The Astrophysical Journal. 155 (2): 94. arXiv:1712.05044. Bibcode:2018AJ....155...94S. doi:10.3847/1538-3881/aa9e09. S2CID 4535051. Retrieved 2017-12-15.
  8. ^ Ragozzine, Darin; Kepler Team (2012-10-01). "The Very Compact Five Exoplanet System KOI-500: Mass Constraints from TTVs, Resonances, and Implications". AAS/Division for Planetary Sciences Meeting Abstracts #44. 44: 200.04. Bibcode:2012DPS....4420004R.
  9. ^ St. Fleur, Nicholas (14 December 2017). "An 8th Planet Is Found Orbiting a Distant Star, With A.I.'s Help". The New York Times. Retrieved 15 December 2017.