Kepler-84

Last updated
Kepler-84
Observation data
Epoch J2000       Equinox J2000
Constellation Cygnus [1]
Right ascension 19h 53m 00.48519s [2]
Declination +40° 29′ 45.9477″ [2]
Apparent magnitude  (V)15.03 [3]
Characteristics
Astrometry
Proper motion (μ)RA: −0.150 mas/yr [2]
Dec.: −2.872 mas/yr [2]
Parallax (π)0.6929±0.7043  mas [2]
Distance 1,066 [4]   pc
Details
Other designations
Kepler-84, KOI-1589, KIC 5301750, 2MASS J19530049+4029458 [5]
Database references
SIMBAD data
Exoplanet Archive data

Kepler-84 is a Sun-like star 3,339 light-years from the Sun. [6] It is a G-type star. The stellar radius measurement has a large uncertainty of 48% as in 2017, complicating the modelling of the star. [7] The Kepler-84 star has two suspected stellar companions. Four stars, all more than four magnitudes fainter than Kepler-84, are seen within a few arcseconds and at least one is probably gravitationally bound to Kepler-84. [8] Another, which has only a 0.005% chance of being a background star, is a yellow star with mass 0.855 M☉ at a projected separation of 0.18±0.05″ or 0.26″ (213.6 AU). [9]

Planetary system

Kepler-84 is orbited by five known planets, four small gas giants and a Super-Earth. Planets Kepler-84b and Kepler-84c were confirmed in 2012 [10] while the rest was confirmed in 2014. [11] To keep the known planetary system stable, no additional giant planets can be located within 7.4 AU from the parent stars. [12]

The Kepler-84 planetary system [13] [14] [15] [16]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b0.126±0.038  MJ 0.0838.725854±0.00006088.24° 0.174±0.045  RJ
c0.064±0.037  MJ 0.10812.882525±0.000093088.24° 0.184±0.047  RJ
d—0.0524.224537±0.000042——0.123±0.024  RJ
e—0.18127.434389±0.000224——0.232±0.044  RJ
f—0.2544.552169±0.000812——0.196±0.038  RJ

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 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  3. ↑ Sousa, S. G.; Adibekyan, V.; Delgado-Mena, E.; Santos, N. C.; Rojas-Ayala, B.; Barros, S. C. C.; Demangeon, O. D. S.; Hoyer, S.; Israelian, G.; Mortier, A.; Soares, B. M. T. B.; Tsantaki, M. (2024). "SWEET-Cat: A view on the planetary mass-radius relation". Astronomy and Astrophysics. 691: A53. arXiv: 2409.11965 . Bibcode:2024A&A...691A..53S. doi:10.1051/0004-6361/202451704.
  4. ↑ Morton, Timothy D.; Bryson, Stephen T.; Coughlin, Jeffrey L.; Rowe, Jason F.; Ravichandran, Ganesh; Petigura, Erik A.; Haas, Michael R.; Batalha, Natalie M. (2016). "False Positive Probabilities for all Kepler Objects of Interest: 1284 Newly Validated Planets and 428 Likely False Positives". The Astrophysical Journal. 822 (2): 86. arXiv: 1605.02825 . Bibcode:2016ApJ...822...86M. doi: 10.3847/0004-637X/822/2/86 .
  5. ↑ "Kepler-84". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved July 13, 2016.
  6. ↑ "Kepler-84 b - NASA Science". science.nasa.gov. 16 March 2016. Retrieved 2024-09-13.
  7. ↑ Ramos, X. S.; Charalambous, C.; Benítez-Llambay, P.; Beaugé, C. (2017), "Planetary migration and the origin of the 2:1 and 3:2 (near)-resonant population of close-in exoplanets", Astronomy & Astrophysics, 602: A101, arXiv: 1704.06459 , Bibcode:2017A&A...602A.101R, doi:10.1051/0004-6361/201629642, S2CID   119369796
  8. ↑ Hirsch, Lea A.; Ciardi, David R.; Howard, Andrew W.; Everett, Mark E.; Furlan, Elise; Saylors, Mindy; Horch, Elliott P.; Howell, Steve B.; Teske, Johanna; Marcy, Geoffrey W. (2017), "Assessing the Effect of Stellar Companions from High-resolution Imaging of Kepler Objects of Interest", The Astronomical Journal, 153 (3): 117, arXiv: 1701.06577 , Bibcode:2017AJ....153..117H, doi: 10.3847/1538-3881/153/3/117 , S2CID   39321033
  9. ↑ Kraus, Adam L.; Ireland, Michael J.; Huber, Daniel; Mann, Andrew W.; Dupuy, Trent J. (2016), "The Impact of Stellar Multiplicity on Planetary Systems. I. The Ruinous Influence of Close Binary Companions", The Astronomical Journal, 152 (1): 8, arXiv: 1604.05744 , Bibcode:2016AJ....152....8K, doi: 10.3847/0004-6256/152/1/8 , S2CID   119110229
  10. ↑ Xie, Ji-Wei (2012), "Transit Timing Variation of Near-Resonance Planetary Pairs: Confirmation of 12 Multiple-Planet Systems", The Astrophysical Journal Supplement Series, 208 (2): 22, arXiv: 1208.3312 , Bibcode:2013ApJS..208...22X, doi:10.1088/0067-0049/208/2/22, S2CID   17160267
  11. ↑ openexoplanetcatalogue.com Kepler-84
  12. ↑ Becker, Juliette C.; Adams, Fred C. (2017), "Effects of Unseen Additional Planetary Perturbers on Compact Extrasolar Planetary Systems", Monthly Notices of the Royal Astronomical Society, 468 (1): 549–563, arXiv: 1702.07714 , Bibcode:2017MNRAS.468..549B, doi: 10.1093/mnras/stx461 , S2CID   119325005
  13. ↑ Furlan, E.; Howell, S. B. (2017), "The densities of planets in multiple stellar systems", The Astronomical Journal, 154 (2): 66, arXiv: 1707.01942 , Bibcode:2017AJ....154...66F, doi: 10.3847/1538-3881/aa7b70 , S2CID   28833730
  14. ↑ Planet Kepler-84 d at exoplanets.eu
  15. ↑ Planet Kepler-84 e at exoplanets.eu
  16. ↑ Planet Kepler-84 f at exoplanets.eu
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