Astronomy:K2-58
From HandWiki
Short description: Star in the constellation Aquarius
Coordinates: 
22h 15m 17.2364s, −14° 02′ 59.3151″
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[2] mas/yr Dec.: -11.11±0.02[2] mas/yr |
| Parallax (π) | 5.4932 ± 0.0194[2] mas |
| 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 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]
| 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
- ↑ 1.0 1.1 "K2-58". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=K2-58.
- ↑ 2.0 2.1 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 3.0 3.1 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
- ↑ 4.0 4.1 4.2 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
- ↑ 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
- ↑ "Exoplanet-catalog". https://exoplanets.nasa.gov/exoplanet-catalog/3323/k2-58-c/.
- ↑ "EPIC 206026904". https://www.cfa.harvard.edu/~avanderb/k2c3/ep206026904.html.
- ↑ "Open Exoplanet Catalogue - K2-58 b". http://www.openexoplanetcatalogue.com/planet/K2-58%20b/.
- ↑ 9.0 9.1 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, doi:10.3847/0067-0049/226/1/7
| Stars |
| ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||
| |||||||||||
| |||||||||||
| Galaxies |
| ||||||||||
| |||||||||||
| |||||||||||
 |  |
