K2-288
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 03h 41m 46.43s[1] |
| Declination | +18° 16′ 08.0″[1] |
| Characteristics | |
| Spectral type | M2 V[1] + M3 V[1] |
| Orbit[1] | |
| Primary | K2-288 A |
| Companion | K2-288 B |
| Semi-major axis (a) | 55 AU |
| Details[1] | |
| K2-288 A | |
| Mass | 0.52±0.02 M☉ |
| Radius | 0.45±0.03 R☉ |
| Surface gravity (log g) | 4.85±0.03 cgs |
| Temperature | 3584±205 K |
| Metallicity [Fe/H] | −0.29±0.09 dex |
| K2-288 B | |
| Mass | 0.33±0.02 M☉ |
| Radius | 0.32±0.03 R☉ |
| Surface gravity (log g) | 4.96±0.02 cgs |
| Temperature | 3341±276 K |
| Metallicity [Fe/H] | −0.21±0.09 dex |
| Database references | |
| SIMBAD | data |
K2-288 is a binary star system consisting of two red dwarfs. The companion star, K2-288B, is known to host a single planet, K2-288Bb.
Planetary System
[edit]In January 2019, it was announced that a team of citizen scientists had discovered a planet orbiting K2-288B.[1]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | — | 0.164 ± 0.03 | 31.393463+0.000067 −0.000069 |
— | 89.81+0.13 −0.17° |
1.90 ± 0.3 R🜨 |
See also
[edit]Kepler 296, similar red dwarf binary with exoplanets
References
[edit]- ^ a b c d e f g h Feinstein, Adina D.; et al. (7 January 2019). "K2-288Bb: A Small Temperate Planet in a Low-mass Binary System Discovered by Citizen Scientists" (PDF). The Astronomical Journal. 157 (2): 40. arXiv:1902.02789. Bibcode:2019AJ....157...40F. doi:10.3847/1538-3881/aafa70. hdl:1721.1/121222.