K2-58
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 15m 17.2364s[1]
Declination −14° 02′ 59.3151″[1]
Apparent magnitude (V) 12.13
Characteristics
Evolutionary stage Main sequence
Spectral type K2
Astrometry
Radial velocity (Rv)6.5±0.8 km/s
Proper motion (μ) RA: 4.67±0.02 mas/yr[2]
Dec.: -11.11±0.02 mas/yr[2]
Parallax (π)5.4932 ± 0.0194 mas[2]
Distance594 ± 2 ly
(182.0 ± 0.6 pc)
Details[3]
Mass0.858+0.022
−0.027[4] M☉
Radius0.803+0.034
−0.020[4] R☉
Surface gravity (log g)4.5 cgs
Temperature5038 K
Metallicity [Fe/H]0.25 dex
Rotational velocity (v sin i)2.2±0.5 km/s
Other designations
EPIC 206026904, 2MASS J22151722-1402593, Gaia DR2 2599975224481836672
Database references
SIMBADdata

K2-58 (also designated as EPIC 206026904) is G-type main-sequence star in the constellation of Aquarius, approximately 596 light-years from Solar System. The star is metal-rich, having 155% of Solar abundance of elements heavier than helium.[3] The star is located in the region allowing to see Venus transiting the Sun for hypothetical observer located in K2-58 system.[5]

Planetary system

The planetary system has three confirmed exoplanets (named as K2-58 b, K2-58 c, K2-58 d),[6][7][8] discovered in 2016.[9]

The K2-58 planetary system[9][4]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
K2-58c — 0.0350 2.53726 — 86.1+2.8
−7.3° 		1.62 R🜨
K2-58b — 0.0692 7.05254 — 88.9+0.8
−1.6° 		2.68 R🜨
K2-58d — 0.1517 22.8827 — 89.43+0.41
−0.81° 		1.71 R🜨

References

  1. ^ a b "K2-58". SIMBAD. Centre de données astronomiques de Strasbourg.
  2. ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  3. ^ a b 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, arXiv:1804.00673, Bibcode:2018ApJS..237...38B, doi:10.3847/1538-4365/aad501, S2CID 119431797
  4. ^ a b c Mayo, Andrew W.; Vanderburg, Andrew; Latham, David W.; Bieryla, Allyson; Morton, Timothy D.; Buchhave, Lars A.; Dressing, Courtney D.; Beichman, Charles; Berlind, Perry; Calkins, Michael L.; Ciardi, David R.; Crossfield, Ian J. M.; Esquerdo, Gilbert A.; Everett, Mark E.; Gonzales, Erica J.; Hirsch, Lea A.; Horch, Elliott P.; Howard, Andrew W.; Howell, Steve B.; Livingston, John; Patel, Rahul; Petigura, Erik A.; Schlieder, Joshua E.; Scott, Nicholas J.; Schumer, Clea F.; Sinukoff, Evan; Teske, Johanna; Winters, Jennifer G. (2018), "275 Candidates and 149 Validated Planets Orbiting Bright Stars inK2 Campaigns 0–10", The Astronomical Journal, 155 (3): 136, arXiv:1802.05277, Bibcode:2018AJ....155..136M, doi:10.3847/1538-3881/aaadff, S2CID 85524387
  5. ^ 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, arXiv:1907.10806, Bibcode:2019ApJS..244...11K, doi:10.3847/1538-4365/ab346b, S2CID 198901606
  6. ^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2019-07-16.
  7. ^ "EPIC 206026904". www.cfa.harvard.edu. Retrieved 2019-07-16.
  8. ^ "Open Exoplanet Catalogue - K2-58 b". www.openexoplanetcatalogue.com. Retrieved 2019-07-16.
  9. ^ a b Crossfield, Ian J. M.; et al. (2021), "197 CANDIDATES AND 104 VALIDATED PLANETS IN K2 's FIRST FIVE FIELDS", The Astrophysical Journal Supplement Series, 226: 7, arXiv:1607.05263, doi:10.3847/0067-0049/226/1/7, S2CID 56125109
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