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K2-58
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| 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
[edit]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]
| 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
[edit]- ^ 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.
- ^ a b c d e 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.
- ^ 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.
- ^ 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
- ^ 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.
- ^ a b c d e 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.
- ^ 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.
- ^ "K2-58". SIMBAD. Centre de données astronomiques de Strasbourg.
- ^ 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
- ^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2019-07-16.
- ^ "EPIC 206026904". www.cfa.harvard.edu. Retrieved 2019-07-16.
- ^ "Open Exoplanet Catalogue - K2-58 b". www.openexoplanetcatalogue.com. Retrieved 2019-07-16.
- ^ a b 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.
