Astronomy:GJ 357 d
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Short description: Extrasolar planet
| Discovery | |
|---|---|
| Discovered by | Rafael Luque, Diana Kossakowski |
| Discovery site | TESS |
| Discovery date | 2019 |
| Radial velocity | |
| Orbital characteristics | |
| 0.204±0.015 astronomical unit|AU[1] | |
| Eccentricity | ≈0.033 ± 0.057[2] |
| Orbital period | 55.70±0.05 d[1] |
| Inclination | <40°[2] |
| Physical characteristics | |
| Mass | 6.1±1.0 M⊕[1] 7.20±1.07 M⊕[2] |
| Physics | 219.6 ± 5.9 K (−53.55 ± 5.90 °C; −64.39 ± 10.62 °F)[1] |
GJ 357 d is an exoplanet, considered to be a "Super-Earth" within the circumstellar habitable zone of its parent star.[3][4][5][6] The planet orbits GJ 357, 31 light-years from our Solar System,[4] The system is part of the Hydra constellation.[4]
The planet was discovered by the TESS team and announced in July 2019. The data confirming the presence of the planet was uncovered in ground based observation dating back to 1998 while confirming the TESS detection of GJ 357 b, a “hot earth” that orbits much closer to the parent star.[6]
References
- ↑ 1.0 1.1 1.2 1.3 Luque, R.; Pallé, E. et al. (2019). "Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization". Astronomy & Astrophysics 628: A39. doi:10.1051/0004-6361/201935801. ISSN 0004-6361. https://www.aanda.org/articles/aa/full_html/2019/08/aa35801-19/aa35801-19.html.
- ↑ 2.0 2.1 2.2 Jenkins, J S; Pozuelos, F J et al. (2019). "GJ 357: a low-mass planetary system uncovered by precision radial velocities and dynamical simulations". Monthly Notices of the Royal Astronomical Society 490 (4): 5585–5595. doi:10.1093/mnras/stz2937. ISSN 0035-8711.
- ↑ Falconer, Rebecca (2019-08-01). "Newly uncovered super-Earth 31 light-years away may be habitable". https://www.axios.com/super-earth-31-light-years-away-may-support-life-d1d0298d-3c82-4f99-a4af-22774fc1ed70.html.
- ↑ 4.0 4.1 4.2 Reddy, Francis; Center, NASA’s Goddard Space Flight (2019-07-31). "TESS Discovers Habitable Zone Planet in GJ 357 System" (in en-US). https://scitechdaily.com/tess-discovers-habitable-zone-planet-in-gj-357-system/.
- ↑ "Potentially habitable ‘super-Earth’ discovered just 31 light-years away" (in en). https://www.nbcnews.com/mach/science/potentially-habitable-super-earth-discovered-just-31-light-years-away-ncna1037491.
- ↑ 6.0 6.1 Garner, Rob (2019-07-30). "NASA's TESS Helps Find Intriguing New World". http://www.nasa.gov/feature/goddard/2019/confirmation-of-toasty-tess-planet-leads-to-surprising-find-of-promising-world.
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