Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Hydra |
Right ascension | 10h 43m 28.2717s[2] |
Declination | −29° 03′ 51.421″[2] |
Apparent magnitude (V) | 7.76[2] |
Characteristics | |
Spectral type | K1V[2] |
B−V color index | 0.9[2] |
Variable type | BY[3] |
Astrometry | |
Radial velocity (Rv) | 22.706±0.14[4] km/s |
Proper motion (μ) | RA: -215.484[4] mas/yr Dec.: -49.892[4] mas/yr |
Parallax (π) | 46.4931 ± 0.0198 mas[4] |
Distance | 70.15 ± 0.03 ly (21.509 ± 0.009 pc) |
Absolute magnitude (MV) | 6.07[5] |
Details | |
Mass | 0.80 (0.77 to 0.85)[6] M☉ |
Radius | 0.77[7] R☉ |
Luminosity | 0.38[7] L☉ |
Temperature | 5000[6] K |
Metallicity [Fe/H] | −0.17[6] dex |
Rotational velocity (v sin i) | 4[6] km/s |
Age | 294 ± 23[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 92945 is a K-type main sequence star in the constellation of Hydra.[2] Its apparent visual magnitude varies by 0.02 magnitudes and is approximately 7.72 at maximum brightness.[3]
In 2007, a debris disk with estimated dust mass 0.047±0.003 ME[8] has been observed around the star by coronagraphic imaging, using the ACS and NICMOS instruments on the Hubble Space Telescope. It appears to extend 45 to 175 astronomical units from HD 92945.[9]
The disk has a gap at radius 73±3 AU which may be carved by the planet,[8] but no planet with mass exceeding 1-2 MJ was observed in the gap.[10]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period ([[]]s) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
Debris disk | 50–140 AU | 65.4±0.9° | — |