Kepler-84

Kepler-84
Observation data; Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	01h 37m 40.87964s
Declination	+12° 04′ 42.1742″
Characteristics
Spectral type	G3
Astrometry
Proper motion (μ)	RA: −0.150 mas/yr ; Dec.: −2.872 mas/yr
Parallax (π)	0.6929 ± 0.7043 mas
Details
Mass	1 M☉
Radius	1.2 R☉
Temperature	5,755 K
Metallicity [Fe/H]	+0.09 ± 0.04 dex
Age	4.9 Gyr
Other designations
	Kepler-84, KOI-1589, Gaia DR2 2073776859551124992, KIC 5301750, 2MASS J19530049+4029458
Database references
SIMBAD	data
ARICNS	data

Kepler-84 is a Sun-like star 3,339 light-years from the Sun.^[5] 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.^[6] The Kepler-84 star has two suspected stellar companions. Four red dwarfs are few arcseconds away and at least one is probably gravitationally bound to Kepler-84.^[7] Another (which is a background star with a probability 0.5%) is a yellow star of mass 0.855M_☉ on projected separations of 0.18±0.05″ or 0.26″ (213.6 AU).^[8]

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^[9] while the rest was confirmed in 2014.^[10] To keep the known planetary system stable, no additional giant planets can be located within 7.4 AU from the parent stars.^[11]

The Kepler-84 planetary system^[12]^[13]^[14]^[15]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	0.126±0.038 $M$ _J	0.083	8.725854±0.00006	0	88.24°	0.174±0.045 $R$ _J
c	0.064±0.037 $M$ _J	0.108	12.882525±0.000093	0	88.24°	0.184±0.047 $R$ _J
d	—	0.052	4.224537±0.000042	—	—	0.123±0.024 $R$ _J
e	—	0.181	27.434389±0.000224	—	—	0.232±0.044 $R$ _J
f	—	0.25	44.552169±0.000812	—	—	0.196±0.038 $R$ _J

References

^ ^a ^b ^c "Kepler-84". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved July 13, 2016.
^ ^a ^b ^c Vidotto, A. A; Gregory, S. G; Jardine, M; Donati, J. F; Petit, P; Morin, J; Folsom, C. P; Bouvier, J; Cameron, A. C; Hussain, G; Marsden, S; Waite, I. A; Fares, R; Jeffers, S; Do Nascimento, J. D (2014). "Stellar magnetism: Empirical trends with age and rotation" (PDF). Monthly Notices of the Royal Astronomical Society. 441 (3): 2361. arXiv:1404.2733. Bibcode:2014MNRAS.441.2361V. doi:10.1093/mnras/stu728. S2CID 43200119.
^ Gray, R. O; Corbally, C. J; Garrison, R. F; McFadden, M. T; Robinson, P. E (2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I". The Astronomical Journal. 126 (4): 2048. arXiv:astro-ph/0308182. Bibcode:2003AJ....126.2048G. doi:10.1086/378365. S2CID 119417105.
^ Melendez, Jorge; Dodds-Eden, Katie; Robles, Jose A (2006). "HD 98618: A Star Closely Resembling our Sun". The Astrophysical Journal. 641 (2): L133 – L136. arXiv:astro-ph/0603219. Bibcode:2006ApJ...641L.133M. doi:10.1086/503898. S2CID 17479387.
^ "Kepler-84 b - NASA Science". science.nasa.gov. Retrieved 2024-09-13.
^ 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
^ 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
^ 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
^ 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
^ openexoplanetcatalogue.com Kepler-84
^ 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
^ 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
^ Planet Kepler-84 d at exoplanets.eu
^ Planet Kepler-84 e at exoplanets.eu
^ Planet Kepler-84 f at exoplanets.eu

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[SIMBAD-1] "Kepler-84". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved July 13, 2016.

[usq-edu-2] Vidotto, A. A; Gregory, S. G; Jardine, M; Donati, J. F; Petit, P; Morin, J; Folsom, C. P; Bouvier, J; Cameron, A. C; Hussain, G; Marsden, S; Waite, I. A; Fares, R; Jeffers, S; Do Nascimento, J. D (2014). "Stellar magnetism: Empirical trends with age and rotation" (PDF). Monthly Notices of the Royal Astronomical Society. 441 (3): 2361. arXiv:1404.2733. Bibcode:2014MNRAS.441.2361V. doi:10.1093/mnras/stu728. S2CID 43200119.

[cern-3] Gray, R. O; Corbally, C. J; Garrison, R. F; McFadden, M. T; Robinson, P. E (2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I". The Astronomical Journal. 126 (4): 2048. arXiv:astro-ph/0308182. Bibcode:2003AJ....126.2048G. doi:10.1086/378365. S2CID 119417105.

[arxiv-4] Melendez, Jorge; Dodds-Eden, Katie; Robles, Jose A (2006). "HD 98618: A Star Closely Resembling our Sun". The Astrophysical Journal. 641 (2): L133 – L136. arXiv:astro-ph/0603219. Bibcode:2006ApJ...641L.133M. doi:10.1086/503898. S2CID 17479387.

[5] "Kepler-84 b - NASA Science". science.nasa.gov. Retrieved 2024-09-13.

[6] 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

[7] 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

[8] 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

[Xie2012-9] 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

[10] xoplanetcatalogue.com Kepler-84

[11] 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

[12] 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

[13] Planet Kepler-84 d at exoplanets.eu

[14] Planet Kepler-84 e at exoplanets.eu

[15] Planet Kepler-84 f at exoplanets.eu

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Kepler-84

Planetary system

References

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