Kepler-84 is a
Sun-like
star 4,700
light-years from the Sun. 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.[5] 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.[6] 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).[7]
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[8] while the rest was confirmed in 2014.[9] To keep the known planetary system stable, no additional giant planets can be located within 7.4
AU from the parent stars.[10]
^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.
S2CID119417105.
^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,
S2CID39321033
^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,
S2CID119110229