Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Centaurus [1] |
Right ascension | 12h 40m 08.781s [2] |
Declination | −44° 18′ 43.27″ [2] |
Apparent magnitude (V) | 10.063 [3] |
Characteristics | |
Evolutionary stage | main-sequence |
Spectral type | G8V [4] |
B−V color index | 0.697±0.041 [1] |
Astrometry | |
Radial velocity (Rv) | 17.46 [2] km/s |
Proper motion (μ) |
RA: −3.723
mas/
yr
[2] Dec.: −13.766 mas/ yr [2] |
Parallax (π) | 9.4499 ± 0.0158 mas [2] |
Distance | 345.1 ± 0.6
ly (105.8 ± 0.2 pc) |
Details | |
Mass | 0.997±0.08 [3] M☉ |
Radius | 0.968 [3] R☉ |
Luminosity | 0.91 [2] L☉ |
Surface gravity (log g) | 4.46±0.05 [3] cgs |
Temperature | 5,732±16 [3] K |
Metallicity [Fe/H] | −0.004 [2] dex |
Rotation | 20.8±1.2 d [3] |
Rotational velocity (v sin i) | 1.74 [3] km/s |
Age | 4.0 [3] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 110113, also known as TOI-755, is a star with a pair of orbiting exoplanets in the Centaurus constellation. With an apparent visual magnitude of 10.063, [3] it is much too faint to be viewed with the naked eye. The system is located at a distance from the Solar System of about 346.5 light-years (106.2 parsecs). It is drifting further away with a heliocentric radial velocity of 17 km/s. [2] A planetary system was discovered orbiting this star in 2021. [3]
The spectrum of HD 110113 presents as a G-type main-sequence star, or yellow dwarf, with a stellar classification of G8V. [4] It has an estimated age of four billion years and is spinning slowly with a rotation period of 20.8 days. The star is considered a solar analog, having nearly the same mass and size as the Sun. It radiating 91% of the Sun's luminosity from its photosphere at an effective temperature of 5,732 K. The star displays rotationally-modulated variability that is indicative of star spots. [3]
The two candidate planets orbiting TOI-755 – TOI-755b and TOI-755c – were announced in 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. [3]
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 |
— | — | — |