Kepler-84 - Misplaced Pages

Star in the constellation Cygnus

Kepler-84
Observation data Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	01 37 40.87964
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	+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. 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. 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. 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).

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

The Kepler-84 planetary system
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

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

Constellation of Cygnus

List of stars in Cygnus

Stars

Bayer	α (Deneb) β (Albireo) γ (Sadr) δ (Fawaris) ε (Aljanah) ζ η θ ι ι κ λ μ ν ξ o o ο π (Azelfafage) π ρ σ τ υ φ χ ψ ω ω P Q
Flamsteed	2 4 8 9 15 16 (c) 17 20 (d) 22 23 26 (e) 27 (b) 28 (b) 29 (b) 33 35 39 41 47 52 55 56 57 59 (f) 61 63 (f) 68 (A) 71 (g) 72 74 75
Variable	R T W X Y RW SS SU TT AZ BC BI CH KY V380 V389 V404 V476 V1027 V1057 V1143 V1191 V1334 V1489 V1500 V1668 V1794 V1974 V2214 V2513
HR	7633 7767 7912 8193
HD	185269 185435 187123 188753 190655 191806 197037
Gliese	777 806 1245
Kepler	2 3 5 6 11 15 16 17 18 22 23 27 28 29 31 32 33 34 35 36 39 40 41 42 43 44 45 47 51 56 61 63 64 (PH1) 66 67 68 69 70 78 80 84 86 (PH2) 87 89 107 167 182 186 223 289 371 385 411 419 432 445 451 452 560 737 1229 1520 1625 1649 1708
WR	133 134 135 136 137 138a 140 142 147 148 150
Other	AFGL 2591 BD+40° 4210 BD+43 3654 Cygnus OB2 #8A Cygnus OB2 #12 Cygnus X-1 Cygnus X-3 G79.29+0.46 G 208-44 G 208-45 GSC 03949-00967 HAT-P-17 KELT-9 KELT-20 KIC 8462852 KIC 9832227 KIC 9970396 KIC 11026764 KIC 11145123 KOI-5 KOI-74 KOI-81 KOI-256 MWC 349 N6946-BH1 PSR J2032+4127 SPECULOOS-3 W75N(B)-VLA2 WASP-48 WISE J2000+3629 Wolf 1069

Star
clusters

Association	Cygnus OB2 Cygnus OB7 Cygnus OB9
Open	Berkeley 86 DR 6 IC 5146 Messier 29 Messier 39 NGC 6811 NGC 6819 NGC 6834 NGC 6866 NGC 6871 NGC 6910

Molecular
clouds

Cygnus X (including DR 21)

Nebulae

Dark	Barnard 146 Barnard 147 IC 5146 L1014
H II	NGC 6914 North America Nebula Pelican Nebula Sadr Region Sh2-101 Sh2-106
Planetary	Abell 78 Egg Nebula IRAS 19475+3119 IRAS 20324+4057 Kronberger 61 M1-92 NGC 6826 NGC 6881 NGC 6884 NGC 7008 NGC 7026 NGC 7027 NGC 7048 Soap Bubble Nebula
WR	Crescent Nebula
SNR	Cygnus Loop (including Veil Nebula)

Galaxies

NGC	6801 6946 7013
Other	3C 438 4C +48.48 Cygnus A ZTF J203349.8+322901.1

Exoplanets

Kepler	2b 3b 3c 5b 6b 11b 15b 16b 17b 22b 23b 28b 32b 33b 34b 36b 39b 40b 41b 47b 56b 61b 64b (PH1b) 68b 69b 70b 78b 87c 186b e f 371b c 409b 419b 432b 451b 452b 560b 737b 1229b 1520b 1625b 1652b 1658b 1649b c 1708b
Other	b Cygni b HD 185269 b HD 187123 b c HD 191806 b KELT-9b KELT-20b TrES-5b

Exomoons

Kepler	1625b I 1708b I

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