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Kepler-65 - Wikipedia

From Wikipedia, the free encyclopedia

Kepler-65
Observation data Epoch J2000 Equinox J2000
Constellation	Lyra
Right ascension	19^h 14^m 45.2916^s^[1]
Declination	+41° 09′ 04.210″^[1]
Apparent magnitude (V)	11.018
Characteristics
Evolutionary stage	Subgiant
Spectral type	F6IV
Astrometry

Proper motion (μ)	RA: 1.256(14) mas/yr^[1] Dec.: −14.388(12) mas/yr^[1]
Parallax (π)	3.3184 ± 0.0108 mas^[1]
Distance	983 ± 3 ly (301.4 ± 1.0 pc)

Details

Mass	1.25 `M`_☉
Radius	1.41 `R`_☉
Temperature	6211 K
Metallicity [Fe/H]	+0.17 dex
Rotation	7.911±0.155 days^[2]

Other designations
KOI-85, KIC 5866724, TYC 3125-976-1, GSC 03125-00976, 2MASS J19144528+4109042^[3]
Database references
SIMBAD	data
KIC	data

Kepler-65 is a subgiant star slightly more massive than the Sun and has at least four planets.

Planetary system

Three transiting planets were announced in 2013. A fourth non-transiting planet was discovered using radial velocity measurements in 2019.^[4] The first three planets orbit very close to their star. Initial follow-up radial velocity measurements provided data too noisy to constrain the mass of planets.^[5] Follow-up transit-timing variation analysis helped to measure the mass of Kepler-65d which revealed that it has significantly lower density than Earth.^[6]

Size comparison of the three planets of Kepler 65 with a known radius (*artistic concept*) with Earth

The Kepler-65 planetary system^[4]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	2.4+2.4 −1.6 $M$ _🜨	0.035	2.1549209+0.0000086 −0.0000074	0.028+0.031 −0.02	92.2+1.3 −1.4°	1.444+0.037 −0.031 $R$ _🜨
c	5.4±1.7 $M$ _🜨	0.068	5.859697+0.000093 −0.000099	0.02+0.022 −0.013	92.33+0.29 −0.26°	2.623+0.066 −0.056 $R$ _🜨
d	4.14+0.79 −0.80 $M$ _🜨	0.084	8.13167+0.00024 −0.00021	0.014+0.016 −0.010	92.35+0.18 −0.16°	1.587+0.040 −0.035 $R$ _🜨
e	200+200 −50 $M$ _🜨	—	258.8+1.5 −1.3	0.283+0.064 −0.071	127.0+27.0 −25.0°	—

External links

References

^ ^a ^b ^c ^d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ McQuillan, A.; Mazeh, T.; Aigrain, S. (2013). "Stellar Rotation Periods of The Kepler objects of Interest: A Dearth of Close-In Planets Around Fast Rotators". The Astrophysical Journal Letters. 775 (1). L11. arXiv:1308.1845. Bibcode:2013ApJ...775L..11M. doi:10.1088/2041-8205/775/1/L11.
^ "Kepler-65". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 January 2017.
^ ^a ^b Mills, Sean M.; et al. (2019). "Long-period Giant Companions to Three Compact, Multiplanet Systems". The Astronomical Journal. 157 (4). 145. arXiv:1903.07186. Bibcode:2019AJ....157..145M. doi:10.3847/1538-3881/ab0899. S2CID 119197547.
^ Chaplin, W. J.; et al. (2013). "Asteroseismic Determination of Obliquities of the Exoplanet Systems Kepler-50 and Kepler-65". The Astrophysical Journal. 766 (2). 101. arXiv:1302.3728. Bibcode:2013ApJ...766..101C. doi:10.1088/0004-637X/766/2/101.
^ Hadden, Sam; Lithwick, Yoram (2014). "Densities and Eccentricities of 139 Kepler Planets from Transit Time Variations". The Astrophysical Journal. 787 (1). 80. arXiv:1310.7942. Bibcode:2014ApJ...787...80H. doi:10.1088/0004-637X/787/1/80.

Constellation of Lyra

Stars

Bayer	α (Vega) β (Sheliak) γ (Sulafat) δ¹ δ² ε¹ ε² ζ¹ ζ² η (Aladfar) θ ι κ λ μ (Alathfar) ν¹ ν²
Flamsteed	16 17 19
Variable	R (13) S T V W RR RV RZ TT TZ UZ XY AY CC CN CY DM EP EZ FL HK HP HR KX MV V344 V361 V404 V473 V477 V478 V533 V542 V543 V545 V550 V558
HR	6845 6847 6853 6901 6968 6984 6997 7016 7017 7019 7030 7033 7041 7043 (Xihe) 7044 7064 7073 7081 7112 7115 7118 7132 7140 7146 7162 7181 7202 7204 7212 7237 7238 7244 7253 7272 7280 7284 7302 7338 7345 7346 7359 7376 7382
HD	177830 179070 180314 181068
Kepler	7 8 9 13 14 19 20 24 25 26 30 37 38 46 59 60 62 65 75 88 91 92 93 94 95 98 100 102 103 104 105 109 128 130 131 138 160 174 177 238 277 279 282 350 410 421 429 444 635 705 1513
Other	Gliese 758 GJ 4063 GSC 02652-01324 HAT-P-5 (Chasoň) KSw 71 LHS 6343 LSR J1835+3259 WASP-3 WASP-58 WISE 1828+2650 WISEP J190648.47+401106.8

Exoplanets

Kepler	7b 8b 9b c d 14b 20b c d e f g 24b c d e 25b c 26e 37b c d 59b 60d 62b c d e f 91b 93b 277b c 438b 440b 442b 453b 705b
Other	HAT-P-5b (Kráľomoc) HD 173416 b (Wangshu) HD 178911 Bb TrES-1b

Star clusters

Nebulae

Ring Nebula

Galaxies

NGC	6606 6612 6640 6646 6657 6662 6663 6665 6671 6672 6675 6685 6686 6688 6692 6695 6700 6702 6703 6710 6713 6740 6745 6765 6792
Other	IC 1296

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Space probe launches

Space probes	LADEE (lunar orbiter; Sep 2013) Mars Orbiter Mission (Mars orbiter; Nov 2013) MAVEN (Mars orbiter; Nov 2013) Chang'e 3 / Yutu (mission to the Moon; Dec 2013)
Space observatories	IRIS (solar observation; Jun 2013) Hisaki (ultraviolet observation; Sep 2013) Gaia (astrometric observation; Dec 2013)