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GSC 03949-00967
Observation data; Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	20h 20m 53.2482s
Declination	+59° 26′ 55.575″
Apparent magnitude (V)	13.58
Characteristics
Spectral type	G/K
Apparent magnitude (J)	12.111±0.027
Apparent magnitude (H)	11.673±0.023
Apparent magnitude (K)	11.591±0.019
Astrometry
Proper motion (μ)	RA: 9.198(14) mas/yr ; Dec.: 30.739(13) mas/yr
Parallax (π)	2.7654 ± 0.0115 mas
Distance	1,179 ± 5 ly ; (362 ± 2 pc)
Details
Mass	0.901±0.029 M☉
Radius	0.851+0.014; −0.013 R☉
Surface gravity (log g)	4.517±0.012 cgs
Temperature	5171±36 K
Metallicity [Fe/H]	0.20±0.8 dex
Rotational velocity (v sin i)	3.80±0.36 km/s
Age	7.38±1.87 Gyr
Other designations
	Gaia DR2 2188601779406152448, GSC 03949-00967, 2MASS J20205324+5926556, TrES-5 parent star
Database references
SIMBAD	data

GSC 03949-00967 is a G-type main-sequence star about 1179 light-years away. It is older than the Sun, yet is enriched by heavy elements compared to the Sun, having 160% of solar abundance.^[4]

Planetary system

TrES-5b

In 2011 a transiting hot Jupiter planet TrES-5b was detected.^[4] The host star was one of the faintest stars to which a planetary companion was detected by the transit method at the time of discovery.^[2] The planet’s equilibrium temperature is 1480±24 K.^[5]

TrES-5c/TrES-5B

An additional planet on a 4-day orbit in the system was suspected since 2018,^[7] but refuted in 2021. Another object on a wide orbit, either star or planet, is still suspected.^[8]

The GSC 03949-00967 planetary system^[7]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	1.784±0.066 $M$ _J	0.02447±0.00021	1.482247063±0.0000005	0.017±0.012	84.529±0.005°	1.209±0.021 $R$ _J

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.
^ ^a ^b ^c Maciejewski, G.; Dimitrov, D.; Mancini, L.; Southworth, J.; Ciceri, S.; D'Ago, G.; Bruni, I.; Raetz, St.; Nowak, G.; Ohlert, J.; Puchalski, D.; Saral, G.; Derman, E.; Petrucci, R.; Jofre, E.; Seeliger, M.; Henning, T. (2016), "New Transit Observations for HAT-P-30 b, HAT-P-37 b, TrES-5 b, WASP-28 b, WASP-36 b and WASP-39 b", Acta Astronomica, 66 (1): 55, arXiv:1603.03268, Bibcode:2016AcA....66...55M
^ ^a ^b ^c Skrutskie, Michael F.; et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. Vizier catalog entry
^ ^a ^b ^c Mandushev, Georgi; Quinn, Samuel N.; Buchhave, Lars A.; Dunham, Edward W.; Rabus, Markus; Oetiker, Brian; Latham, David W.; Charbonneau, David; Brown, Timothy M.; Belmonte, Juan A.; O'Donovan, Francis T. (2011), "TrES-5: A Massive Jupiter-sized Planet Transiting A Cool G-dwarf", The Astrophysical Journal, 741 (2): 114, arXiv:1108.3572, Bibcode:2011ApJ...741..114M, doi:10.1088/0004-637X/741/2/114, S2CID 118671116
^ ^a ^b 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
^ "GSC 03949-00967". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2022-01-06.
^ ^a ^b Sokov, Eugene N.; Sokova, Iraida A.; Dyachenko, Vladimir V.; Rastegaev, Denis A.; Burdanov, Artem; Rusov, Sergey A.; Benni, Paul; Shadick, Stan; Hentunen, Veli-Pekka; Salisbury, Mark; Esseiva, Nicolas; Garlitz, Joe; Bretton, Marc; Ogmen, Yenal; Karavaev, Yuri; Ayiomamitis, Anthony; Mazurenko, Oleg; Alonso, David; Velichko, Sergey F. (2018), "Transit timing analysis of the exoplanet TrES-5 b. Possible existence of the exoplanet TrES-5 c", Monthly Notices of the Royal Astronomical Society, 480 (1): 291–301, arXiv:1806.03503, Bibcode:2018MNRAS.480..291S, doi:10.1093/mnras/sty1615, S2CID 53665645
^ Maciejewski, G.; et al. (December 2021). "Revisiting TrES-5 b: departure from a linear ephemeris instead of short-period transit timing variation". Astronomy & Astrophysics. 656. A88. arXiv:2110.14294. Bibcode:2021A&A...656A..88M. doi:10.1051/0004-6361/202142424.