Astronomy:Gliese 682
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Short description: Star in the constellation Scorpius
Coordinates: 
17h 37m 03.6613s, −44° 19′ 09.18″
  Gliese 682 Location of Gliese 682 in the constellation Scorpius | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Scorpius[1] |
| Right ascension | 17h 37m 03.6655s[2] |
| Declination | −44° 19′ 09.166″[2] |
| Apparent magnitude (V) | 10.94[3] |
| Characteristics | |
| Spectral type | M3.5V[4] |
| Apparent magnitude (B) | ~12.61[5] |
| Apparent magnitude (V) | ~10.96[5] |
| Apparent magnitude (J) | 6.544 ±0.023[5] |
| Apparent magnitude (H) | 5.917 ±0.038[5] |
| Apparent magnitude (K) | 5.606 ±0.020[5] |
| Astrometry | |
| Radial velocity (Rv) | −34.90±0.30[2] km/s |
| Proper motion (μ) | RA: −705.945±0.035[2] mas/yr Dec.: −938.080±0.021[2] mas/yr |
| Parallax (π) | 199.6944 ± 0.0312[2] mas |
| Distance | 16.333 ± 0.003 ly (5.0077 ± 0.0008 pc) |
| Absolute magnitude (MV) | 12.4[6] |
| Details | |
| Mass | 0.27[4] M☉ |
| Radius | 0.30[3] R☉ |
| Luminosity | 0.008118[4] L☉ |
| Surface gravity (log g) | 4.95[7] cgs |
| Temperature | 3,237[3] K |
| Metallicity [Fe/H] | 0.05±0.09[7] dex |
| Rotational velocity (v sin i) | 3.42[8] km/s |
| Age | 6.4±4.3[7] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | star |
| planet b | |
| planet c | |
| Exoplanet Archive | data |
| ARICNS | data |
Gliese 682, also known as GJ 682, is a nearby star. It is listed as the 53rd-nearest known star system to the Sun,[9] being 16.3 light years distant. Even though it is close by, as a red dwarf, it is dim with a magnitude of 10.95 and thus requires a telescope to be seen. It is located in the constellation of Scorpius, near the bright star Theta Scorpii.[5] The star is in a crowded region of sky near the Galactic Center, and so appears to be near a number of deep-sky objects from the Solar System's perspective. The star is only 0.5 degrees from the much more distant globular cluster NGC 6388.
Planetary system
Evidence for a giant planet was presented in 2026. Its semi-major axis is very uncertain, somewhere between 0.4 and 70 au, and the mass is somewhere between 0.2 and 10 MJ.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| (unconfirmed) | 0.58+9.17 −0.42 MJ |
8.8+61.0 −8.4 |
— | — | — | — |
Search for planets
Two planets were detected orbiting Gliese 682 in 2014, one of which would be in the habitable zone.[11][12] A 2020 study did not find these planets and concluded that the radial velocity signals were probably caused by stellar activity.[13]
References
- ↑ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 Suissa, Gabrielle; Mandell, Avi M.; Wolf, Eric T.; Villanueva, Geronimo L.; Fauchez, Thomas; Kopparapu, Ravi Kumar (2020). "Dim Prospects for Transmission Spectra of Ocean Earths around M Stars". The Astrophysical Journal 891 (1): 58. doi:10.3847/1538-4357/ab72f9. Bibcode: 2020ApJ...891...58S.
- ↑ 4.0 4.1 4.2 Martínez-Rodríguez, Héctor; Caballero, José Antonio; Cifuentes, Carlos; Piro, Anthony L.; Barnes, Rory (2019). "Exomoons in the Habitable Zones of M Dwarfs". The Astrophysical Journal 887 (2): 261. doi:10.3847/1538-4357/ab5640. Bibcode: 2019ApJ...887..261M.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 "LHS 451 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GJ+682.
- ↑ Boro Saikia, S.; Marvin, C. J.; Jeffers, S. V.; Reiners, A.; Cameron, R.; Marsden, S. C.; Petit, P.; Warnecke, J. et al. (2018). "Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles". Astronomy and Astrophysics 616: 616. doi:10.1051/0004-6361/201629518. Bibcode: 2018A&A...616A.108B.
- ↑ 7.0 7.1 7.2 Maldonado, J.; Micela, G.; Baratella, M.; d'Orazi, V.; Affer, L.; Biazzo, K.; Lanza, A. F.; Maggio, A. et al. (2020). "HADES RV programme with HARPS-N at TNG. XII. The abundance signature of M dwarf stars with planets". Astronomy and Astrophysics 644: A68. doi:10.1051/0004-6361/202039478. Bibcode: 2020A&A...644A..68M.
- ↑ Hojjatpanah, S.; Figueira, P.; Santos, N. C.; Adibekyan, V.; Sousa, S. G.; Delgado-Mena, E.; Alibert, Y.; Cristiani, S. et al. (2019). "Catalog for the ESPRESSO blind radial velocity exoplanet survey". Astronomy and Astrophysics 629: A80. doi:10.1051/0004-6361/201834729. Bibcode: 2019A&A...629A..80H.
- ↑ Reylé, Céline; Jardine, Kevin; Fouqué, Pascal; Caballero, Jose A.; Smart, Richard L.; Sozzetti, Alessandro (30 April 2021). "The 10 parsec sample in the Gaia era". Astronomy & Astrophysics 650: A201. doi:10.1051/0004-6361/202140985. Bibcode: 2021A&A...650A.201R. Data available at https://gruze.org/10pc/
- ↑ 10.0 10.1 Ó, Clarissa R. Do; Thompson, William; Blakely, Dori; Sanghi, Aniket; Xuan, Jerry W.; Mawet, Dimitri; Speedie, Jessica; Blunt, Sarah; Blouin, Simon; Zhang, Jingwen; Johnstone, Doug; Ruffio, Jean-Baptiste; Nielsen, Eric; Bowler, Brendan P.; Bouchard-Côté, Alexandre; Franson, Kyle; Roberson, William; Cloutier, Ryan; Fogal, Andre; Hessel, Kaitlyn; Marois, Christian; Rochon, Alexandra. "Astrometric Evidence for Outer Giant Planets in Known Exoplanet Systems". arXiv:2609.37160 [astro-ph.EP].
- ↑ Tuomi, M. et al. (2014). "Bayesian search for low-mass planets around nearby M dwarfs - estimates for occurrence rate based on global detectability statistics". Monthly Notices of the Royal Astronomical Society 441 (2): 1545. doi:10.1093/mnras/stu358. Bibcode: 2014MNRAS.441.1545T.
- ↑ "The Habitable Exoplanets Catalog". University of Puerto Rico at Arecibo. http://phl.upr.edu/projects/habitable-exoplanets-catalog.
- ↑ Feng, Fabo; Butler, R. Paul; Shectman, Stephen A.; Crane, Jeffrey D.; Vogt, Steve; Chambers, John; Jones, Hugh R. A.; Wang, Sharon Xuesong et al. (8 January 2020). "Search for Nearby Earth Analogs. II. Detection of Five New Planets, Eight Planet Candidates, and Confirmation of Three Planets around Nine Nearby M Dwarfs". The Astrophysical Journal Supplement Series 246 (1): 11. doi:10.3847/1538-4365/ab5e7c. Bibcode: 2020ApJS..246...11F.
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