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GSC 02620-00648 is a double star in the constellation Hercules. The brighter of the pair is a magnitude 12 star located approximately 1,660 light-years away. This star is about 1.18 times as massive as the Sun.[1]

GSC 02620-00648
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Hercules
A[1]
Right ascension 17h 53m 13.0490s[2]
Declination +37° 12′ 42.586″[2]
Apparent magnitude (V) 11.592[3]
Ca
Right ascension ~17h 53m 13.0496s[4]
Declination ~+37° 12′ 44.139″[4]
Apparent magnitude (V) 13.85[1]
Characteristics
Spectral type F8[1]/K or M[1]
Apparent magnitude (B) 12.1120005 ±0.007[5]
Apparent magnitude (V) 11.592 ±0.004[5]
Apparent magnitude (J) 10.583 ±0.018[3]
Apparent magnitude (H) 10.350 ±0.015[3]
Apparent magnitude (K) 10.330 ±0.019[3]
Astrometry
A
Proper motion (μ) RA: −6.382[2] mas/yr
Dec.: −20.891[2] mas/yr
Parallax (π)1.9686 ± 0.0124 mas[2]
Distance1,660 ± 10 ly
(508 ± 3 pc)
C
Proper motion (μ) RA: −6.307[4] mas/yr
Dec.: −20.387[4] mas/yr
Parallax (π)1.9657 ± 0.1076 mas[4]
Distance1,660 ± 90 ly
(510 ± 30 pc)
Details
A
Mass1.18[1] M☉
Radius1.9[2] R☉
Luminosity4.6[2] L☉
Surface gravity (log g)3.98[2] cgs
Temperature6,200±75[citation needed] K
Metallicity [Fe/H]+0.14±0.09[citation needed] dex
Rotational velocity (v sin i)8.3[6] km/s
Age4.7±2[citation needed] Gyr
B
Mass0.59[1] M☉
Other designations
TrES-4 Parent Star, 2MASS J17531304+3712426, TYC 2620-648-1[3]
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data

Planetary system


In 2006 the TrES program discovered exoplanet TrES-4 using the transit method.[5] This planet orbits the primary star.[1]

The GSC 02620-00648 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
TrES-4 0.919 ± 0.073[1] MJ 0.05091 ± 0.00071[1] 3.553945 ± 7.5e-05 0 — —

Binary star


In 2008 a study was undertaken of 14 stars with exoplanets that were originally discovered using the transit method through relatively small telescopes. These systems were re-examined with the 2.2M reflector telescope at the Calar Alto Observatory in Spain. This star system, along with two others, was determined to be a previously unknown binary star system. The previously unknown secondary star is a dim magnitude 14 K or M-type star separated by about 755 AU from the primary, appearing offset from the primary by about one arc second in the images. This discovery resulted in a recalculation of parameters for both the planet and the primary star.[1]


See also



Notes



References


  1. Daemgen; Hormuth, F.; Brandner, W.; Bergfors, C.; Janson, M.; Hippler, S.; Henning, T. (2009). "Binarity of transit host stars - Implications for planetary parameters". Astronomy and Astrophysics. 498 (2): 567–574. arXiv:0902.2179. Bibcode:2009A&A...498..567D. doi:10.1051/0004-6361/200810988. S2CID 9893376.
  2. Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
  3. "NAME TrES-4 Parent Star". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-04-23.
  4. Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
  5. Mandushev; O'Donovan, Francis T.; Charbonneau, David; Torres, Guillermo; Latham, David W.; Bakos, Gáspár Á.; Dunham, Edward W.; Sozzetti, Alessandro; Fernández, José M.; Esquerdo, Gilbert A.; Everett, Mark E.; Brown, Timothy M.; Rabus, Markus; Belmonte, Juan A.; Hillenbrand, Lynne A. (2007). "TrES-4: A Transiting Hot Jupiter of Very Low Density". The Astrophysical Journal Letters. 667 (2): L195–L198. arXiv:0708.0834. Bibcode:2007ApJ...667L.195M. doi:10.1086/522115. S2CID 6087170.
  6. Brewer, John M.; Fischer, Debra A. (2018). "Spectral Properties of Cool Stars: Extended Abundance Analysis of Kepler Objects of Interest". The Astrophysical Journal Supplement Series. 237 (2): 38. arXiv:1804.00673. Bibcode:2018ApJS..237...38B. doi:10.3847/1538-4365/aad501. S2CID 119431797.



На других языках

[de] GSC 02620-00648

Der Stern GSC 02620-00648 befindet sich im Sternbild Herkules und ist ca. 1400 Lichtjahre von der Erde entfernt. Er ist größer und heißer als unsere Sonne, außerdem ist er auch wesentlich leuchtkräftiger als diese und emittiert drei- bis viermal so viel Energie pro Sekunde.
- [en] GSC 02620-00648


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