Gliese 682
Gliese 682 or GJ 682 is a red dwarf. It is listed as the 49th-nearest known star to the Sun, being about 16 light years away from the Earth. Even though it is close by, 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.[1]
| Observation data Epoch J2000 Equinox | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 17h 37m 03.6613s[1] |
| Declination | –44° 19′ 09.18″[1] |
| Apparent magnitude (V) | 10.96[1] |
| Characteristics | |
| Spectral type | M3.5[1] |
| Apparent magnitude (B) | ~12.61[1] |
| Apparent magnitude (V) | ~10.96[1] |
| Apparent magnitude (J) | 6.544 ±0.023[1] |
| Apparent magnitude (H) | 5.917 ±0.038[1] |
| Apparent magnitude (K) | 5.606 ±0.020[1] |
| Astrometry | |
| Radial velocity (Rv) | -60.0[1] km/s |
| Proper motion (μ) | RA: -710.29 ± 2.85[1] mas/yr Dec.: -938.17 ± 2.07[1] mas/yr |
| Parallax (π) | 203.49 ± 1.30[2] mas |
| Distance | 16.0 ± 0.1 ly (4.91 ± 0.03 pc) |
| Absolute magnitude (MV) | 12.45 |
| Other designations | |
CD-44 11909, GJ 682, LHS 451, LFT 1358, HIP 86214, PLX 3992. | |
| Database references | |
| SIMBAD | star |
| planet b | |
| planet c | |
| Exoplanet Archive | data |
| ARICNS | data |
| Extrasolar Planets Encyclopaedia | data |
Proposed planetary system
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (unconfirmed) | >4.4 M⊕ | 0.08 | 17.48 | 0.08 | — | — |
| c (unconfirmed) | >8.7 M⊕ | 0.18 | 57.32 | 0.10 | — | — |
Two candidate planets were detected orbiting Gliese 682 in 2014, one of which would be in the habitable zone.[3][4] However, a 2020 study did not find these planets and concluded that the radial velocity signals were probably caused by stellar activity.[5]
See also
- List of nearest stars
References
- "LHS 451 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-12-14.
- Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Dieterich, Sergio B.; Finch, Charlie T.; Ianna, Philip A.; Riedel, Adric R.; Silverstein, Michele L.; Subasavage, John P.; Vrijmoet, Eliot Halley (2018). "The Solar Neighborhood XLIV: RECONS Discoveries within 10 parsecs". The Astronomical Journal. 155 (6): 265. arXiv:1804.07377. Bibcode:2018AJ....155..265H. doi:10.3847/1538-3881/aac262. S2CID 53983430.
- 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. arXiv:1403.0430. Bibcode:2014MNRAS.441.1545T. doi:10.1093/mnras/stu358. S2CID 32965505.
- "The Habitable Exoplanets Catalog". Planetary Habitability Laboratory. University of Puerto Rico at Arecibo. Retrieved 7 October 2020.
- Feng, Fabo; Butler, R. Paul; Shectman, Stephen A.; Crane, Jeffrey D.; Vogt, Steve; Chambers, John; Jones, Hugh R. A.; Wang, Sharon Xuesong; Teske, Johanna K.; Burt, Jenn; Díaz, Matías R.; Thompson, Ian B. (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. arXiv:2001.02577. Bibcode:2020ApJS..246...11F. doi:10.3847/1538-4365/ab5e7c. S2CID 210064560.
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