K2-58
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| 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] |
| Distance | 594 ± 2 ly (182.0 ± 0.6 pc) |
| Details[3] | |
| Mass | 0.858+0.022 −0.027[4] M☉ |
| Radius | 0.803+0.034 −0.020[4] R☉ |
| Surface gravity (log g) | 4.5 cgs |
| Temperature | 5038 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 | |
| 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.[3] The star is located in a region where a hypothetical observer in the K2-58 system can see Venus transiting the sun.[5]
Planetary system
[edit]The planetary system has three confirmed exoplanets, named K2-58 b, K2-58 c, and K2-58 d,[6][7][8] discovered in 2016.[9]
| 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
[edit]- ^ a b "K2-58". SIMBAD. Centre de données astronomiques de Strasbourg.
- ^ 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.
- ^ 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
- ^ 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
- ^ 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. (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
