TOI-755
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 star |
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[1] mas |
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]
Characteristics[]
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]
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]
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 (unconfirmed) | 10.49 ± 1.2 M⊕ | 0.068+0.001 −0.002 |
6.744+0.008 −0.009 |
— | — | — |
References[]
- ^ Jump up to: a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
- ^ Jump up to: a b c d e Osborn, H. P.; Armstrong, D. J.; Adibekyan, V.; Collins, K. A.; Delgado-Mena, E.; Howell, S. B.; Hellier, C.; King, G. W.; Lillo-Box, J.; Nielsen, L. D.; Otegi, J. F.; Santos, N. C.; Ziegler, C.; Anderson, D. R.; Briceño, C.; Burke, C.; Bayliss, D.; Barrado, D.; Bryant, E. M.; Brown, D J A.; Barros, S C C.; Bouchy, F.; Caldwell, D. A.; Conti, D. M.; Díaz, R. F.; Dragomir, D.; Deleuil, M.; Demangeon, O D S.; Dorn, C.; et al. (2021), "A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113", Monthly Notices of the Royal Astronomical Society, arXiv:2101.04745, Bibcode:2021MNRAS.tmp..240O, doi:10.1093/mnras/stab182
- ^ Jump up to: a b Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
Categories:
- Planetary systems with one confirmed planet
- G-type main-sequence stars
- Henry Draper Catalogue objects
- Hipparcos objects
- Durchmusterung objects
- Centaurus (constellation)
- TESS Objects of Interest
- Main-sequence-star stubs