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K2-58

Topic: Astronomy

 From HandWiki - Reading time: 4 min

K2-58 (also designated as EPIC 206026904) is a G-type main-sequence star in the constellation of Aquarius, approximately 596 light-years from the Solar System. The star is metal-rich, having 155% of the Solar abundance of elements heavier than helium.[1] The star is located in a region where a hypothetical observer in the K2-58 system can see Venus transiting the Sun.[2]

Planetary system

The planetary system has three confirmed exoplanets, named K2-58 b, K2-58 c, and K2-58 d,[3][4][5] discovered in 2016.[6]

The K2-58 planetary system[6][7]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
c — 0.0350 2.53726 — 86.1+2.8−7.3° 1.62 R⊕
b — 0.0692 7.05254 — 88.9+0.8−1.6° 2.68 R⊕
d — 0.1517 22.8827 — 89.43+0.41−0.81° 1.71 R⊕

References

  1. ↑ Brewer, John M.; Fischer, Debra A. (2018). "Spectral Properties of Cool Stars: Extended Abundance Analysis of Kepler Objects of Interest". The Astrophysical Journal Supplement Series 237 (2): 38. doi:10.3847/1538-4365/aad501. Bibcode: 2018ApJS..237...38B. 
  2. ↑ Kruse, Ethan; Agol, Eric; Luger, Rodrigo; Foreman-Mackey, Daniel (2019), "Detection of Hundreds of New Planet Candidates and Eclipsing Binaries in K2 Campaigns 0–8", The Astrophysical Journal Supplement Series 244 (1): 11, doi:10.3847/1538-4365/ab346b, Bibcode: 2019ApJS..244...11K 
  3. ↑ "Exoplanet-catalog". https://exoplanets.nasa.gov/exoplanet-catalog/3323/k2-58-c/. 
  4. ↑ "EPIC 206026904". https://www.cfa.harvard.edu/~avanderb/k2c3/ep206026904.html. 
  5. ↑ "Open Exoplanet Catalogue - K2-58 b". http://www.openexoplanetcatalogue.com/planet/K2-58%20b/. 
  6. ↑ 6.0 6.1 Crossfield, Ian J. M. et al. (2016). "197 Candidates and 104 Validated Planets in K2's First Five Fields". The Astrophysical Journal Supplement Series 226 (1): 7. doi:10.3847/0067-0049/226/1/7. Bibcode: 2016ApJS..226....7C. 
  7. ↑ Mayo, Andrew W.; Vanderburg, Andrew; Latham, David W.; Bieryla, Allyson; Morton, Timothy D.; Buchhave, Lars A.; Dressing, Courtney D.; Beichman, Charles et al. (2018), "275 Candidates and 149 Validated Planets Orbiting Bright Stars inK2 Campaigns 0–10", The Astronomical Journal 155 (3): 136, doi:10.3847/1538-3881/aaadff, Bibcode: 2018AJ....155..136M 

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