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Qatar-1 - Wikipedia

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Qatar-1
Observation data Epoch J2000 Equinox
Constellation	Draco
Right ascension	20^h 13^m 31.6176^s
Declination	65° 09′ 43.4909″
Apparent magnitude (V)	12.84
Characteristics
Evolutionary stage	main sequence star
Spectral type	K3V
B−V color index	1.06
V−R color index	0.19
J−H color index	0.472
J−K color index	0.590
Variable type	planetary transit variable
Astrometry

Radial velocity (R_v)	-37.835±0.063 km/s
Proper motion (μ)	RA: 12.636±0.048 mas/yr Dec.: 58.170±0.041 mas/yr
Parallax (π)	5.3587 ± 0.0231 mas
Distance	609 ± 3 ly (186.6 ± 0.8 pc)

Details^[1]^[2]

Mass	0.85±0.03 `M`_☉
Radius	0.823±0.025 `R`_☉
Surface gravity (log g)	4.536±0.024 cgs
Temperature	4861±125 K
Metallicity [Fe/H]	0.2±0.1 dex
Rotational velocity (v sin i)	1.7±0.3 km/s
Age	4.5 Gyr

Other designations
Qatar-1, 2MASS J20133160+6509433, Gaia DR2 2244830490514284928, V592 Dra^[3]
Database references
SIMBAD	data

Qatar-1 is an orange main sequence star in the constellation of Draco.

Star characteristics

Qatar-1 has an average to high metallicity of 160% of solar,^[1] and is of similar age to Sun.^[2] The star has significant starspot activity.^[4]

Planetary system

The "Hot Jupiter" class planet Qatar-1b was discovered by the Qatar Exoplanet Survey in 2010.^[1] The planetary orbit is likely aligned with the rotational axis of the star, with the misalignment measurement based on the Rossiter-McLaughlin effect equal to −8.4±7.1 degrees.^[2] The planet has a large measured temperature difference between dayside (1696±39 K) and nightside (1098±158 K).^[5] A spectroscopic study in 2017 does suggest that Qatar-1b has relatively clear skies with a few clouds.^[6]

Additional planets or a brown dwarf in the system were suspected in 2013,^[7] but were refuted in 2015.^[8]^[9]

The transit-timing variation search in 2020 has also resulted in no detection of additional planets in the system,^[10]^[11] although by 2022 additional transit-timing variation data have suggested the planetary system is accelerating under influence of the unseen long-period companion.^[12]

The Qatar-1 planetary system^[1]^[2]^[10]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	1.33±0.05 $M$ _J	0.02343±0.0012	1.4200236±0.0000001^[11]	0.020^+0.011 _−0.01	84.23±0.06°	1.19±0.09 $R$ _J

References

^ ^a ^b ^c ^d Alsubai, K. A.; Parley, N. R.; Bramich, D. M.; West, R. G.; Sorensen, P. M.; Collier Cameron, A.; Latham, D. W.; Horne, K.; Anderson, D. R.; Bakos, G. Á.; Brown, D. J. A.; Buchhave, L. A.; Esquerdo, G. A.; Everett, M. E.; Fűrész, G.; Hartman, J. D.; Hellier, C.; Miller, G. M.; Pollacco, D.; Quinn, S. N.; Smith, J. C.; Stefanik, R. P.; Szentgyorgyi, A. (2011). "Qatar-1b: A hot Jupiter orbiting a metal-rich K dwarf star". Monthly Notices of the Royal Astronomical Society. 417 (1): 709–716. arXiv:1012.3027. Bibcode:2011MNRAS.417..709A. doi:10.1111/j.1365-2966.2011.19316.x. S2CID 55675165.
^ ^a ^b ^c ^d Covino, E.; Esposito, M.; Barbieri, M.; Mancini, L.; Nascimbeni, V.; Claudi, R.; Desidera, S.; Gratton, R.; Lanza, A. F.; Sozzetti, A.; Biazzo, K.; Affer, L.; Gandolfi, D.; Munari, U.; Pagano, I.; Bonomo, A. S.; Collier Cameron, A.; Hébrard, G.; Maggio, A.; Messina, S.; Micela, G.; Molinari, E.; Pepe, F.; Piotto, G.; Ribas, I.; Santos, N. C.; Southworth, J.; Shkolnik, E.; Triaud, A. H. M. J.; et al. (2013). "The GAPS programme with HARPS-N at TNG". Astronomy & Astrophysics. 554: A28. arXiv:1304.0005. doi:10.1051/0004-6361/201321298. S2CID 54793301.
^ Qatar 1 -- High proper-motion Star
^ Mislis, D.; Mancini, L.; Tregloan-Reed, J.; Ciceri, S.; Southworth, J.; d'Ago, G.; Bruni, I.; Baştürk, Ö.; Alsubai, K. A.; Bachelet, E.; Bramich, D. M.; Henning, Th.; Hinse, T. C.; Iannella, A. L.; Parley, N.; Schroeder, T. (2015). "High-precision multiband time series photometry of exoplanets Qatar-1b and TrES-5b". Monthly Notices of the Royal Astronomical Society. 448 (3): 2617–2623. arXiv:1503.02246. Bibcode:2015MNRAS.448.2617M. doi:10.1093/mnras/stv197. S2CID 53561305.
^ May, Erin; Stevenson, Kevin; Bean, Jacob; Bell, Taylor; Cowan, Nicolas; Dang, Lisa; Desert, Jean-Michel; Fortney, Jonathan; Keating, Dylan; Kempton, Eliza; Komacek, Thaddeus; Lewis, Nikole; Mansfield, Megan; Morley, Caroline; Parmentier, Vivien; Rauscher, Emily; Swain, Mark; Zellem, Robert; Showman, Adam (2022), "A New Analysis of Eight Spitzer Phase Curves and Hot Jupiter Population Trends: Qatar-1b, Qatar-2b, WASP-52b, WASP-34b, and WASP-140b", The Astronomical Journal, 163 (6): 256, arXiv:2203.15059, Bibcode:2022AJ....163..256M, doi:10.3847/1538-3881/ac6261, S2CID 247778438
^ von Essen, C.; Cellone, S.; Mallonn, M.; Albrecht, S.; Miculán, R.; Müller, H. M. (2017). "Testing connections between exo-atmospheres and their host stars". Astronomy & Astrophysics. 603: A20. arXiv:1703.10647. doi:10.1051/0004-6361/201730506. S2CID 119452420.
^ von Essen, C.; Schröter, S.; Agol, E.; Schmitt, J. H. M. M. (2013). "Qatar-1: Indications for possible transit timing variations". Astronomy & Astrophysics. 555: A92. arXiv:1309.1457. Bibcode:2013A&A...555A..92V. doi:10.1051/0004-6361/201321407. S2CID 119174903.
^ MacIejewski, G.; Fernández, M.; Aceituno, F. J.; Ohlert, J.; Puchalski, D.; Dimitrov, D.; Seeliger, M.; Kitze, M.; Raetz, St.; Errmann, R.; Gilbert, H.; Pannicke, A.; Schmidt, J.-G.; Neuhäuser, R. (2015). "No variations in transit times for Qatar-1 B". Astronomy & Astrophysics. 577: A109. arXiv:1503.07191. Bibcode:2015A&A...577A.109M. doi:10.1051/0004-6361/201526031. S2CID 118638934.
^ Collins, Karen A.; Kielkopf, John F.; Stassun, Keivan G. (2015). "TRANSIT TIMING VARIATION MEASUREMENTS OF WASP-12b AND QATAR-1b: NO EVIDENCE OF ADDITIONAL PLANETS". The Astronomical Journal. 153 (2): 78. arXiv:1512.00464. doi:10.3847/1538-3881/153/2/78. S2CID 55191644.
^ ^a ^b Thakur, Parijat; Mannaday, Vineet Kumar; Sahu, Devendra Kumar; Chand, Swadesh; Jiang, Ing-Guey (2020), "Investigating Extra-solar Planetary System Qatar-1 through Transit Observations", Bulletin de la Société Royale des Sciences de Liège: 132–136, arXiv:2007.03753, doi:10.25518/0037-9565.7577, S2CID 54660279
^ ^a ^b Su, Li-Hsin; Jiang, Ing-Guey; Sariya, Devesh P.; Lee, Chiao-Yu; Yeh, Li-Chin; Mannaday, Vineet Kumar; Thakur, Parijat; Sahu, D. K.; Chand, Swadesh; Shlyapnikov, A. A.; Moskvin, V. V.; Ignatov, Vladimir; Mkrtichian, David; Griv, Evgeny (2021), "Are There Transit Timing Variations for the Exoplanet Qatar-1b?", The Astronomical Journal, 161 (3): 108, arXiv:2012.08184, Bibcode:2021AJ....161..108S, doi:10.3847/1538-3881/abd4d8, S2CID 229181287
^ Mannaday, Vineet Kumar; Thakur, Parijat; Southworth, John; Jiang, Ing-Guey; Sahu, D. K.; Mancini, L.; Vaňko, M.; Kundra, Emil; Gajdoš, Pavol; a-Thano, Napaporn; Sariya, Devesh P.; Yeh, Li-Chin; Griv, Evgeny; Mkrtichian, David; Shlyapnikov, Aleksey (2022), "Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with TESS Data", The Astronomical Journal, 164 (5): 198, arXiv:2209.04080, Bibcode:2022AJ....164..198M, doi:10.3847/1538-3881/ac91c2, S2CID 252185524

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	6 7 (Tianyi) 8 (Taiyi) 10 (i) 15 (A) 18 (g) 19 (h) 26 36 39 (b) 42 (Fafnir) 45 (d) 64 (e) 68
Variable	TW AG BY CL CM CX DO V581
HR	3751 4126 4934 5811 6237 6618 (Alruba) 6817 7137 7783
HD	101364 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 LP 71-82 Qatar-1 Struve 2398 TOI-1136 WISE 1647+5632

Exoplanets	Orbitar HD 139357 b HD 167042 b Hypatia Kepler-4b Kepler-10b c Kepler-12b Kepler-90e f g h i 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 6566 6621 6622 6670 6676 6786 6789
Other	1ES 1959+650 3C 249.1 3C 305 3C 319 3C 356 3C 371 3C 390.3 3C 401 4C +72.26 H1821+643 HFLS3 KKR 25 Markarian 876 PGC 39058 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