| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 26m 27.84909s[1] |
| Declination | +10° 04′ 49.3342″[1] |
| Apparent magnitude (V) | 8.92[2] |
| Characteristics | |
| Evolutionary stage | Main sequence[3] |
| Spectral type | F8[4] |
| Astrometry | |
| Radial velocity (Rv) | 50.42±0.37[5] km/s |
| Proper motion (μ) | RA: −48.002±0.020mas/yr[1] Dec.: 0.062±0.015mas/yr[1] |
| Parallax (π) | 9.4360±0.0208 mas[1] |
| Distance | 345.7 ± 0.8 ly (106.0 ± 0.2 pc) |
| Details | |
| Mass | 1.15+0.06 −0.05[6] M☉ |
| Radius | 1.25+0.16 −0.11[6] R☉ |
| Surface gravity (log g) | 4.28 cgs |
| Temperature | 6,251[6] K |
| Metallicity [Fe/H] | 0.00[6] dex |
| Rotational velocity (v sin i) | 5.7[6] km/s |
| Other designations | |
| BD+10°1799,HIP 41378,PPM 125260,YZ 10 3402, AG+10 1097,EPIC 211311380[7] | |
| Database references | |
| SIMBAD | data |
HIP 41378 is astar located 346light-years away in theconstellation 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 about6,251 K.
In 2016, theK2 Kepler mission discovered five planets around HIP 41378, with sizes ranging from 2 times the size of Earth to the size ofJupiter, out to about 1 AU for the outermost planet.[8] The semi-major axes were not known until K2Haute-Provence Observatory radial velocity data was obtained in 2019. Also, a sixth non-transiting planet, HIP 41378 g, was discovered, along with speculation that additional planets may exist between HIP 41378 g and HIP 41378 d. The planet HIP 41378 f was also found to likely have optically-thick rings or a highly extended atmosphere.[3][9]
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 6.89 ± 0.88 M🜨 | 0.1283 | 15.57208 ± 0.00002 | 0.07 ± 0.06 | 88.75 ± 0.13° | 2.17 ± 0.28 R🜨 |
| c | 4.4 ± 1.1 M🜨 | 0.2161 | 31.706038 ± 0.00006 | 0.04 | 88.477 ± 0.06° | 2.727 ± 0.06 R🜨 |
| g | 7.0 ± 1.5 M🜨 | 0.3227 ± 0.0036 | 62.06 ± 0.32 | 0.06 | — | — |
| d | <4.6 M🜨 | 0.88 ± 0.01 | 278.3618 ± 0.0005 | 0.06 ± 0.06 | 89.80 ± 0.02° | 3.54 ± 0.06 R🜨 |
| e | 12 ± 5 M🜨 | 1.06 ± 0.03 | 369 ± 10 | 0.14 ± 0.09 | 89.84 ± 0.07° | 4.92 ± 0.09 R🜨 |
| f | 12 ± 3 M🜨 | 1.37 ± 0.02 | 542.07975 ± 0.00014 | 0 | 89.971 ± 0.01° | 9.2 ± 0.1 R🜨 |
2016 in space | ||
|---|---|---|
Space probe launches |
|    |
| Impact events | ||
| SelectedNEOs | ||
| Exoplanets |
| |
| Discoveries |
| |
| Novae | ||
| Comets | ||
| Space exploration | ||
