K2-24
K2-24 (also known as EPIC 203771098) is a metal-rich G3-type main sequence star larger and more massive than the Sun, located 560 light-years (172 parsecs) away in the constellation Scorpius. Two confirmed transiting exoplanets are known to orbit this star. An attempt to detect stellar companions using adaptive optics imaging at the Keck telescope was negative however later observations using lucky imaging at the Danish 1.54 m telescope at La Silla Observatory detected a possible companion at 3.8 arcseconds distance from K2-24. This candidate companion being over 8 magnitudes fainter than K2-24 and with a color temperature of 5400 Kelvin, is inconsistent with a bound main sequence companion.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 16h 10m 17.6977s |
| Declination | −24° 59′ 25.261″ |
| Apparent magnitude (V) | 11.068±0.110 |
| Characteristics | |
| Spectral type | G3V |
| Apparent magnitude (J) | 9.635±0.024 |
| Apparent magnitude (H) | 9.294±0.022 |
| Apparent magnitude (K) | 9.180±0.021 |
| Variable type | Planetary transit |
| Astrometry | |
| Radial velocity (Rv) | 1.18(32) km/s |
| Proper motion (μ) | RA: −59.891(21) mas/yr Dec.: −58.702(14) mas/yr |
| Parallax (π) | 5.8273 ± 0.0169 mas |
| Distance | 560 ± 2 ly (171.6 ± 0.5 pc) |
| Details | |
| Mass | 1.07±0.06 M☉ |
| Radius | 1.16±0.04 R☉ |
| Surface gravity (log g) | 4.29±0.05 cgs |
| Temperature | 5625±60 K |
| Metallicity [Fe/H] | 0.34±0.04 dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
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