HIP 41378
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 26m 27.84923s[1] |
| Declination | +10° 04′ 49.3340″[1] |
| Apparent magnitude (V) | 8.92[2] |
| Characteristics | |
| Evolutionary stage | Main sequence[3] |
| Spectral type | F8[4] |
| Astrometry | |
| Radial velocity (Rv) | 50.42[1] km/s |
| Proper motion (μ) | RA: −48.143[1] mas/yr Dec.: 0.059[1] mas/yr |
| Parallax (π) | 9.3799 ± 0.0590[1] mas |
| Distance | 348 ± 2 ly (106.6 ± 0.7 pc) |
| Details | |
| Mass | 1.15+0.06 −0.05[5] M☉ |
| Radius | 1.25+0.16 −0.11[5] R☉ |
| Surface gravity (log g) | 4.28 cgs |
| Temperature | 6,251[5] K |
| Metallicity [Fe/H] | 0.00[5] dex |
| Rotational velocity (v sin i) | 5.7[5] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HIP 41378 is a star located 348 light-years away in the constellation of Cancer. The star has an apparent magnitude of 8.92. This F-type main sequence dwarf has a mass of 1.15 M☉ and a radius of 1.25 R☉. It has a surface temperature of about 6,251 K.
Planetary system[]
In 2016, the K2 Kepler mission discovered five planets around HIP 41378, with sizes ranging from 2 times the size of Earth to the size of Jupiter, out to about 1 AU for the outermost planet. The semi-major axes were not known until K2 Haute-Provence Observatory radial velocity data was obtained in 2019. Also, a sixth non-transiting planet, HIP 41378 g, was discovered, and additional planets are still suspected between HIP 41378 g and HIP 41378 d.[7] The planet HIP 41378 f was also found to likely have optically-thick rings or a highly extended atmosphere.[3][8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 6.89 ± 0.88 M
|