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Kepler-296

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Star in the constellation Draco

Kepler-296
Observation data Epoch J2000 Equinox J2000
Constellation	Draco^[1]
Right ascension	19^h 06^m 09.60253^s^[2]
Declination	+49° 26′ 14.3969″^[2]
Characteristics
Spectral type	K7 V + M1 V^[3]
Astrometry

Proper motion (μ)	RA: 2.635 mas/yr^[2] Dec.: −16.375 mas/yr^[2]
Parallax (π)	4.5538±0.5562 mas^[2]
Distance	approx. 720 ly (approx. 220 pc)

Details^[4]
Kepler-296 A
Mass	0.498+0.067 −0.087 `M`_☉
Radius	0.480+0.066 −0.087 `R`_☉
Surface gravity (log g)	4.774+0.091 −0.059 cgs
Temperature	3740±130 K
Metallicity[Fe/H]	−0.08+0.28 −0.30 dex
Kepler-296 B
Mass	0.326+0.070 −0.079 `M`_☉
Radius	0.322+0.060 −0.068 `R`_☉
Surface gravity (log g)	4.993+0.087 −0.063 cgs
Temperature	3440±75 K
Metallicity[Fe/H]	−0.08+0.28 −0.30 dex
Other designations
Kepler-296,KOI-1422,KIC 11497958,2MASS J19060960+4926143^[5]
Database references
SIMBAD	data
Exoplanet Archive	data
KIC	data

Kepler-296 is abinary star system^[4] in the constellationDraco. The primary star appears to be a lateK-type main-sequence star, while the secondary is ared dwarf.^[3]

Planetary system

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The following plot shows the approximate sizes of the planets in this system compared to planets in the Solar System.^[6]

Fiveexoplanets have been detected around the system; all are believed to be orbiting the primary star rather than its dimmer companion.^[4] Two planets in particular,Kepler-296e andKepler-296f, are likely located in thehabitable zone.^[4] For the planetary system to remain stable, no additional giant planets can be located up to orbital radius 10.1AU.^[7]

The Kepler-296 A planetary system^[4]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
c	—	0.0521+0.0088 −0.0086	5.8416366±0.000010	<0.33	—	2.00+0.33 −0.32 R_🜨
b	—	0.079±0.013	10.864384+0.000051 −0.000046	<0.33	—	1.61+0.29 −0.27 R_🜨
d	—	0.118±0.020	19.850291+0.000061 −0.000057	<0.33	—	2.09+0.33 −0.32 R_🜨
e	—	0.169+0.029 −0.028	34.14211±0.00025	<0.33	—	1.53+0.27 −0.25 R_🜨
f	—	0.255+0.043 −0.042	63.33627+0.00060 −0.00062	<0.33	—	1.80+0.31 −0.30 R_🜨

References

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^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 atVizieR.
^^a ^b ^c ^dVallenari, 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 atVizieR.
^^a ^bLissauer, Jack J; Marcy, Geoffrey W; Bryson, Stephen T; Rowe, Jason F; Jontof-Hutter, Daniel; Agol, Eric; Borucki, William J; Carter, Joshua A; Ford, Eric B; Gilliland, Ronald L; Kolbl, Rea; Star, Kimberly M; Steffen, Jason H; Torres, Guillermo (2014). "Validation Ofkepler's Multiple Planet Candidates. Ii. Refined Statistical Framework and Descriptions of Systems of Special Interest".The Astrophysical Journal.784 (1): 44.arXiv:1402.6352.Bibcode:2014ApJ...784...44L.doi:10.1088/0004-637X/784/1/44.S2CID 119108651.
^^a ^b ^c ^d ^eBarclay, Thomas; Quintana, Elisa V; Adams, Fred C; Ciardi, David R; Huber, Daniel; Foreman-Mackey, Daniel; Montet, Benjamin T; Caldwell, Douglas (2015). "The Five Planets in the Kepler-296 Binary System All Orbit the Primary: A Statistical and Analytical Analysis".The Astrophysical Journal.809 (1): 7.arXiv:1505.01845.Bibcode:2015ApJ...809....7B.doi:10.1088/0004-637X/809/1/7.S2CID 37742564.
^"Kepler-296".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved26 November 2017.
^"Open Exoplanet Catalogue - Kepler-296 b".www.openexoplanetcatalogue.com. Retrieved2021-03-19.
^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

External links

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Kepler-296 - Open Exoplanet Catalogue

Constellation of Draco

Stars

Bayer	α (Thuban) β (Rastaban) γ (Eltanin) δ (Altais) ε(Tyl) ζ (Aldhibah) η (Athebyne) θ ι (Edasich) κ λ (Giausar) μ (Alrakis) ν(Kuma) ξ (Grumium) ο π ρ σ (Alsafi) τ υ φ χ ψ¹ (Dziban) ψ² ω
Flamsteed	4 6 7 (Tianyi) 8 (Taiyi) 10 (i) 15 (A) 18 (g) 19 (h) 26 36 39 (b) 42 (Fafnir) 45 (d) 50 59 64 (e) 68
Variable	TW YY AG BY CL CM CX DO HP V581
HR	3751 4126 4934 5811 6237 6618 (Alruba) 6817 7137 7783
HD	101364 147379 156279 158259 176693 191939
Other	2MASS 1237+6526 2MASS J17554042+6551277 G 240-72 GD 356 Gliese 420 Gliese 625 Gliese 687 GRW +70 8247 Kepler-4 Kepler-10 Kepler-12 Kepler-90 Kepler-296 KOI-256 LP 71-82 Qatar-1 Struve 2398 TOI-1136 WD 1856+534 WISE 1647+5632

Exoplanets	HD 139357 b HD 167042 b ι Dra b (Hypatia) Kepler-4b Kepler-10b c Kepler-12b Kepler-90e f g h i Kepler-296b c d e f TOI-1452 b TrES-2b

Star clusters	LAMOST 1

Nebulae	Abell 50 Cat's Eye Nebula

Galaxies

NGC	3147 4121 4125 4236 4319 4345 4513 4589 5678 5777 5866 5866B 5879 5906 5907 5949 5963 5965 5982 5985 6090 6248 6285 6286 6338 6340 6365 6373 6394 6412 6503 6505 6566 6621 6622 6670 6676 6786 6789
Other	1ES 1927+654 1ES 1959+650 3C 249.1 3C 305 3C 319 3C 343 3C 343.1 3C 351 3C 356 3C 371 3C 380 3C 390.3 3C 401 4C +72.26 GB 1508+5714 H1821+643 HFLS3 IERS B1946+708 IRAS F17179+5444 KKR 25 Markarian 876 PGC 39058 QSO B1823+568 S5 1803+784 S5 2007+777 UGC 9391

Galaxy clusters	Abell 2218 CL1358+62 Draco Supercluster

Astronomical events	Swift J1644+57 SN 2005B SN 2016aps

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Planetary system

See also

References

External links