HD 92945

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]

HD 92945

A light curve for V419 Hydrae, plotted over one 13.47 day period, from TESS data[1]
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 – 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
V419 Hydrae, V419 Hya, CD−28 8394, CPD−28 4175, GJ 3615, HIP 52462, LTT 3932, NLTT 25167, PPM 258065, SAO 179168, 2MASS J10432828-2903513[2]
Database references
SIMBAD	data

Debris disk

Image of the debris disk with the REASONS survey^[8]

In 2007, a debris disk with estimated dust mass 0.047±0.003 M_🜨^[9] 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.^[10]

The disk has a gap at radius 73±3 AU which may be carved by the planet,^[9] but no planet with mass exceeding 1-2 M_J was observed in the gap.^[11]

Evidence for a planet via astrometric observations was presented in 2024.^[12]

The HD 92945 planetary system^[9][12]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (years)	Eccentricity	Inclination	Radius
Debris disk	50–140 AU				65.4±0.9°	—
(unconfirmed)	0.7±0.3 MJ	14±15	—	—	—	—