GSC 02620-00648

Last updated
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]
C [a]
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 [3]
Apparent magnitude  (J)10.583±0.018 [5]
Apparent magnitude  (H)10.350±0.015 [5]
Apparent magnitude  (K)10.330±0.019 [5]
Astrometry
A
Radial velocity (Rv)−15.65±0.82 [2] km/s
Proper motion (μ)RA: −6.382 mas/yr [2]
Dec.: −20.891 mas/yr [2]
Parallax (π)1.9686±0.0136  mas [2]
Distance 1,660 ± 10  ly
(508 ± 4  pc)
C
Proper motion (μ)RA: −6.307  mas/yr [4]
Dec.: −20.387  mas/yr [4]
Parallax (π)1.9657 ± 0.1076  mas [4]
Distance 1,660 ± 90  ly
(510 ± 30  pc)
Details [6]
A
Mass 1.45±0.05  M☉
Radius 1.81±0.08  R☉
Luminosity 4.6 [2]   L☉
Surface gravity (log g)4.09±0.03  cgs
Temperature 6,295±65  K
Metallicity [Fe/H]+0.28±0.09  dex
Rotational velocity (v sin i)8.5±0.5 km/s
Age 2.2±0.4  Gyr
C
Mass 0.59 [1]   M☉
Other designations
TrES-4 Parent Star, TOI-2124, TIC 159742538, TYC 2620-648-1, GSC 02620-00648, 2MASS J17531304+3712426 [7]
Database references
SIMBAD A
C
Exoplanet Archive data

GSC 02620-00648 is a binary star system located approximately 1,660 light-years away in the constellation Hercules. The brighter of the pair is a magnitude 12 star about 1.45 times as massive as the Sun. It hosts one known exoplanet, TrES-4b. [3]

Contents

Nomenclature

The designation GSC 02620-00648 comes from the Guide Star Catalog.

The star is sometimes called TrES-4, [8] in reference to its planet discovered by the Trans-Atlantic Exoplanet Survey (TrES). The discovery paper [3] and the SIMBAD database [7] use this designation for the planet itself, but other sources call the star TrES-4 [9] and the planet TrES-4b, [6] following the standard exoplanet naming convention.

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]

Planetary system

In 2006, the Trans-Atlantic Exoplanet Survey discovered the exoplanet TrES-4b using the transit method. [3] This planet orbits the primary star. [1] The planet is a low-density hot Jupiter, with a larger size than Jupiter but a smaller mass, and an orbital period of only four days. [6]

The GSC 02620-00648 planetary system [10]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 0.498+0.033
−0.032  MJ 		0.05159+0.00059
−0.00061		3.55392771(47)<0.01583.07+0.51
−0.44 ° 		1.838+0.081
−0.090  RJ

See also

Notes

  1. ↑ The secondary star is identified with a "C" suffix so as not to confuse it with the planetary designation suffix "b".

References

  1. 1 2 3 4 5 6 7 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. 1 2 3 4 5 6 7 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.
  3. 1 2 3 4 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.
  4. 1 2 3 4 5 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.
  5. 1 2 3 Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". Vizier Online Data Catalog. Bibcode:2003yCat.2246....0C.
  6. 1 2 3 Sozzetti, A.; Bonomo, A. S.; et al. (March 2015). "The GAPS programme with HARPS-N at TNG. VI. The curious case of TrES-4b". Astronomy & Astrophysics . 575: L15. arXiv: 1501.06403 . Bibcode:2015A&A...575L..15S. doi:10.1051/0004-6361/201425570.
  7. 1 2 "NAME TrES-4 Parent Star". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2009-04-23.
  8. ↑ "TrES-4 Overview". NASA Exoplanet Archive . Retrieved 11 March 2025.
  9. ↑ Narita, Norio; Sato, Bun'ei; et al. (June 2010). "Spin-Orbit Alignment of the TrES-4 Transiting Planetary System and Possible Additional Radial-Velocity Variation". Publications of the Astronomical Society of Japan . 62 (3): 653–660. arXiv: 1003.2268 . Bibcode:2010PASJ...62..653N. doi:10.1093/pasj/62.3.653.
  10. ↑ Bonomo, A. S.; Desidera, S.; et al. (June 2017). "The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics . 602: A107. arXiv: 1704.00373 . Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.