K2-58

K2-58

Observation data Epoch J2000       Equinox J2000
Constellation	Aquarius [1]
Right ascension	22h 15m 17.2365s [2]
Declination	−14° 02′ 59.313″ [2]
Apparent magnitude  (V)	12.13
Characteristics
Evolutionary stage	Main sequence
Spectral type	K0 [3]
Astrometry
Radial velocity (Rv)	6.48±0.42 [2] 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]
Distance	594 ± 2  ly (182.0 ± 0.6  pc)
Details
Mass	0.858+0.022 −0.027 [4]   M☉
Radius	0.803+0.034 −0.020 [4]   R☉
Luminosity	0.57 [5]   L☉
Surface gravity (log g)	4.5 [6]   cgs
Temperature	5,038 [6]   K
Metallicity [Fe/H]	0.25 [6]   dex
Rotational velocity (v sin i)	2.2±0.5 [6]  km/s
Age	5.1+3.1 −2.6 [7]   Gyr
Other designations
EPIC 206026904, 2MASS J22151722-1402593, Gaia DR3 2599975224481836672 [8]
Database references
SIMBAD	data

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. ^[6] The star is located in a region where a hypothetical observer in the K2-58 system can see Venus transiting the Sun. ^[9]

Planetary system

The planetary system has three confirmed exoplanets, named K2-58 b, K2-58 c, and K2-58 d, ^{[10] [11] [12]} discovered in 2016. ^[13]

The K2-58 planetary system ^{[13] [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. Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
2. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
3. Hardegree-Ullman, Kevin K.; Zink, Jon K.; Christiansen, Jessie L.; Dressing, Courtney D.; Ciardi, David R.; Schlieder, Joshua E. (2020). "Scaling K2. I. Revised Parameters for 222,088 K2 Stars and a K2 Planet Radius Valley at 1.9 R_⊕". The Astrophysical Journal Supplement Series. 247 (1): 28. arXiv: 2001.11511 . Bibcode:2020ApJS..247...28H. doi: 10.3847/1538-4365/ab7230 .
4. 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. Ostberg, Colby; Kane, Stephen R.; Li, Zhexing; Schwieterman, Edward W.; Hill, Michelle L.; Bott, Kimberly; Dalba, Paul A.; Fetherolf, Tara; Head, James W.; Unterborn, Cayman T. (2023). "The Demographics of Terrestrial Planets in the Venus Zone". The Astronomical Journal. 165 (4): 168. arXiv: 2302.03055 . Bibcode:2023AJ....165..168O. doi: 10.3847/1538-3881/acbfaf .
6. 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.
7. Zink, Jon K.; Hardegree-Ullman, Kevin K.; Christiansen, Jessie L.; Petigura, Erik A.; Boley, Kiersten M.; Bhure, Sakhee; Rice, Malena; Yee, Samuel W.; Isaacson, Howard; Fernandes, Rachel B.; Howard, Andrew W.; Blunt, Sarah; Lubin, Jack; Chontos, Ashley; Pidhorodetska, Daria; MacDougall, Mason G. (2023). "Scaling K2. VI. Reduced Small-planet Occurrence in High-galactic-amplitude Stars". The Astronomical Journal. 165 (6): 262. arXiv: 2305.13389 . Bibcode:2023AJ....165..262Z. doi: 10.3847/1538-3881/acd24c .
8. "K2-58". SIMBAD . Centre de données astronomiques de Strasbourg.
9. 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
10. "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2019-07-16.
11. "EPIC 206026904". www.cfa.harvard.edu. Retrieved 2019-07-16.
12. "Open Exoplanet Catalogue - K2-58 b". www.openexoplanetcatalogue.com. Retrieved 2019-07-16.
13. 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. arXiv: 1607.05263 . Bibcode:2016ApJS..226....7C. doi: 10.3847/0067-0049/226/1/7 .