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HD 110113, also known as TOI-755, is a Sun-like star with a distance from the Solar System of about 346.5 light-years (106.2 parsecs) and located in the Centaurus constellation. A planetary system was discovered orbiting this star in 2021.[2]

HD 110113

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Centaurus
Right ascension	12h 40m 08.781s[1]
Declination	−44° 18′ 43.27″[1]
Apparent magnitude (V)	10.063[2]
Characteristics
Evolutionary stage	main-sequence
Spectral type	G8V[3]
Astrometry
Radial velocity (Rv)	17.46[1] km/s
Proper motion (μ)	RA: −3.723[1] mas/yr Dec.: −13.766[1] mas/yr
Parallax (π)	9.4499 ± 0.0158 mas[1]
Distance	345.1 ± 0.6 ly (105.8 ± 0.2 pc)
Details
Mass	0.997±0.08[2] M☉
Radius	0.968[2] R☉
Luminosity	0.91[1] L☉
Surface gravity (log g)	4.46[2] cgs
Temperature	5,732[2] K
Metallicity [Fe/H]	−0.004[1] dex
Rotation	20.8 d[2]
Rotational velocity (v sin i)	1.74[2] km/s
Age	4.0[2] Gyr
Other designations
CD−43°7805, HD 110113, HIP 61820
Database references
SIMBAD	data

Characteristics

HD 110113 has been classified as a G-type main-sequence star (yellow dwarf). It has a temperature of 5,730 kelvins (5,460 °C), and a solar mass of almost 1, similar to the Sun.[2]

Planetary system

The two planets that are orbiting TOI-755, TOI-755b and TOI-755c, were suspected since 2021. TOI-755b's temperature is over 1,570 K (1,300 °C) and TOI-755c's temperature is cooler at around 1,260 K (990 °C), which means they are Hot Neptunes.[2]

The HD 110113 planetary system

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	4.54 ± 0.64 M🜨	0.035	2.541+0.0005 −0.001	—	—	2.05 ± 0.12 R🜨
c	10.49 ± 1.2 M🜨	0.068+0.001 −0.002	6.744+0.008 −0.009	—	—	—

References

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