// Workers AI · dad joke modeWhat did TrES-4 say to its friend? You're a star 4 me.
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Hercules[1] |
| A[2] | |
| Right ascension | 17h 53m 13.0490s[3] |
| Declination | +37° 12′ 42.586″[3] |
| Apparent magnitude (V) | 11.592[4] |
| C[a] | |
| Right ascension | 17h 53m 13.0496s[5] |
| Declination | +37° 12′ 44.139″[5] |
| Apparent magnitude (V) | 13.85[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | F8[2]/K or M[2] |
| Apparent magnitude (B) | 12.1120005±0.007[4] |
| Apparent magnitude (J) | 10.583±0.018[6] |
| Apparent magnitude (H) | 10.350±0.015[6] |
| Apparent magnitude (K) | 10.330±0.019[6] |
| Astrometry | |
| A | |
| Radial velocity (Rv) | −15.65±0.82[3] km/s |
| Proper motion (μ) | RA: −6.382 mas/yr[3] Dec.: −20.891 mas/yr[3] |
| Parallax (π) | 1.9686±0.0136 mas[3] |
| Distance | 1,660 ± 10 ly (508 ± 4 pc) |
| C | |
| Proper motion (μ) | RA: −6.307 mas/yr[5] Dec.: −20.387 mas/yr[5] |
| Parallax (π) | 1.9657±0.1076 mas[5] |
| Distance | 1,660 ± 90 ly (510 ± 30 pc) |
| Details | |
| A | |
| Mass | 1.45±0.05[7] M☉ |
| Radius | 1.78±0.06[8] R☉ |
| Luminosity | 5.0±0.2[8] L☉ |
| Surface gravity (log g) | 4.364±0.095[8] cgs |
| Temperature | 6,472±84[8] K |
| Metallicity [Fe/H] | = +0.25±0.04[8] dex |
| Rotational velocity (v sin i) | 8.5±0.5[7] km/s |
| Age | 2.2±0.4[7] Gyr |
| C | |
| Mass | 0.59[2] M☉ |
| Other designations | |
| TrES-4 Parent Star, TOI-2124, TIC 159742538, TYC 2620-648-1, GSC 02620-00648, 2MASS J17531304+3712426[9] | |
| Database references | |
| SIMBAD | A |
| C | |
| Exoplanet Archive | data |
![{\displaystyle {\begin{smallmatrix}\left[{\mathrm {M} }/{\mathrm {H} }\right]\end{smallmatrix}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/d9a106d03666c72cc54c1dff07a5637d3adda9a1)
TrES-4 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.[4]
Nomenclature
[edit]The designation GSC 02620-00648 comes from the Guide Star Catalog.
The star is sometimes called TrES-4,[10] in reference to its planet discovered by the Trans-Atlantic Exoplanet Survey (TrES). The discovery paper[4] and the SIMBAD database[9] use this designation for the planet itself, but other sources call the star TrES-4[11] and the planet TrES-4b,[7] following the standard exoplanet naming convention.
Binary star
[edit]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.[2]
Planetary system
[edit]In 2006, the Trans-Atlantic Exoplanet Survey discovered the exoplanet TrES-4b using the transit method.[4] This planet orbits the primary star.[2] 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.[7]
| 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) | <0.015 | 83.07+0.51 −0.44 |
1.73±0.06[8] RJ |
See also
[edit]Notes
[edit]- ↑ The secondary star is identified with a "C" suffix so as not to confuse it with the planetary designation suffix "b".
References
[edit]- ↑ 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 at VizieR.
- 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.
- 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.
- 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.
- 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.
- 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.
- 1 2 3 4 5 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.
- 1 2 3 4 5 6 de Laverny, Patrick; Ligi, Roxanne; Crida, Aurélien; Recio-Blanco, Alejandra; Palicio, Pedro A. (July 2025). "The Gaia spectroscopic catalogue of exoplanets and host stars". Astronomy & Astrophysics. 699: A100. arXiv:2505.22205. Bibcode:2025A&A...699A.100D. doi:10.1051/0004-6361/202554739. ISSN 0004-6361.
- 1 2 "NAME TrES-4 Parent Star". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-04-23.
- ↑ "TrES-4 Overview". NASA Exoplanet Archive. Retrieved 11 March 2025.
- ↑ 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.
- ↑ 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.
External links
[edit]- "TrES-4". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2009-04-28.
- Muir, Hazel (August 6, 2007). "Largest known exoplanet puzzles astronomers". NewScientist.com news service. Retrieved 2007-08-07.
