A request that this article title be changed to HD 110113 is under discussion. Please do not move this article until the discussion is closed. |
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 | G5V[ citation needed ] |
Astrometry | |
Radial velocity (Rv) | 17.13 [3] 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 [2] | |
Mass | 0.997±0.08 M☉ |
Radius | 0.968 R☉ |
Luminosity | 0.928 [3] L☉ |
Surface gravity (log g) | 4.46 cgs |
Temperature | 5,732 K |
Rotation | 20.8 d |
Rotational velocity (v sin i) | 1.74 km/s |
Age | 4.0 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
TOI-755, also known as HD 110113, 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. The discovery by Osborn et al. was published at the Monthly Notices of the Royal Astronomical Society in 2021. [2]
TOI-755 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]
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]
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 | — | — | — |
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