TOI-763

{{Short description|G-type star in the constellation of Centaurus}} {{Starbox begin | name = TOI-763 }} {{Starbox image | image = [[File:Location of TOI-763 (created with the Stellarium open source engine).png|280px]] | caption = Location of TOI-763 in the night sky. The general location of the star is marked within the red square. }} {{Starbox observe | epoch = J2000 | constell = [[Centaurus]]<ref name=constellation/> | ra = {{RA|12|57|52.447}}<ref name="GaiaDR3" /> | dec = {{DEC|-39|45|27.71}}<ref name="GaiaDR3" /> | appmag_v = 10.28<ref name="SIMBAD" /> }} {{Starbox character | type = [[main sequence]]<ref name="Fridlund2020" /><ref name="GaiaDR3" /> | class = G<ref name="Fridlund2020" /> }} {{Starbox astrometry | radial_v = {{val|-13.82|0.16}}<ref name="GaiaDR3" /> | prop_mo_ra = −76.744 | prop_mo_dec = −84.721 | pm_footnote = <ref name="GaiaDR3" /> | parallax = 10.4655 | p_error = 0.0183 | parallax_footnote = <ref name="GaiaDR3" /> | absmag_v = }} {{Starbox detail | source = <ref name="Fridlund2020" /> | mass = {{val|0.917|0.028}} | radius = {{val|0.897|0.013}} | luminosity = 0.68<ref name=dl2025/> | gravity = {{val|4.45|0.05}} | temperature = {{val|5450|60|fmt=commas}} | metal_fe = {{val|+0.01|0.05}} | rotation = {{val|27|16}} days | rotational_velocity = | age_gyr = 6.0<ref name=adrien2024/> }} {{Starbox catalog | names = {{odlist | 2MASS=J12575245-3945275 | CD=-39 7945 | TIC=178819686 | TOI=763}}<ref name="SIMBAD" /> }} {{Starbox reference | Simbad = CD-39+7945 | NSTED = TOI-763 }} {{Starbox end}}

[[File:NGC 4832 DSS.png|thumb|left|TOI-763 is the bright star to the left of the galaxy [[NGC 4832]] in this image.]] '''TOI-763''' is a single [[Proper motion|high proper motion]] [[G-type main-sequence star|G-type]] [[star]] in the [[constellation]] of [[Centaurus]], near the galaxy [[NGC 4832]] in the sky.<ref name="SIMBAD" /> It is approximately 0.9 times the mass and radius of the [[Sun]], with a surface temperature of 5,450{{±|60}} [[Kelvin|K]] and a spectral type of G7.<ref>{{Cite web |title=TOI-763 |url=https://www.exoplanetkyoto.org/exohtml/TOI-763.html |access-date=2025-04-25 |website=www.exoplanetkyoto.org}}</ref> TOI-763 is too faint to be visible to the naked eye. Based upon [[Stellar parallax|parallax]] measurements, it is located {{convert|95.6|pc|ly|lk=on|abbr=off|order=flip}} in distance from the Sun. The object is drifting towards the Sun with a [[radial velocity]] of {{val|-13.8|u=km/s}}.<ref name="GaiaDR3" />

== Planetary system == In August of 2020, two [[exoplanet]]s were identified via the [[transit method]] of exoplanet detection by the [[Transiting Exoplanet Survey Satellite]] (TESS), a [[space telescope]] for [[NASA]]'s [[Explorer program]], designed to search for exoplanets. A third candidate planet is suspected based on [[radial velocity]] observations.<ref name="Fridlund2020" />

Neither of these two planets [[orbit]] in the [[habitable zone]] and are both believed to be [[sub-Neptune]] planets.<ref>{{Cite web |date=2020-09-24 |title=TOI-763 c - NASA Science |url=https://science.nasa.gov/exoplanet-catalog/toi-763-c/ |access-date=2025-04-25 |language=en-US}}</ref>

{{OrbitboxPlanet begin | name = TOI-763 | table_ref = <ref name="Fridlund2020" /> }} {{OrbitboxPlanet | exoplanet = b | mass_earth = {{val|9.79|0.78}} | radius_earth = {{val|2.28|0.11}} | semimajor = {{val|0.0600|0.0006}} | period = {{val|5.6057|0.0013}} | eccentricity = {{val|0.04|0.04|0.03}} }} {{OrbitboxPlanet | exoplanet = c | mass_earth = {{val|9.32|1.02}} | radius_earth = {{val|2.63|0.12}} | semimajor = {{val|0.1011|0.0010}} | period = {{val|12.2737|0.0053|0.0077}} | eccentricity = {{val|0.04|0.04|0.03}} }} {{OrbitboxPlanet hypothetical | exoplanet = d | mass_earth = {{val|9.54|1.59|p=≥}} | radius_earth = | semimajor = {{val|0.2504|0.0093|0.0105}} | period = {{val|47.7991|2.7399}} | eccentricity = ~0 }} {{Orbitbox end}}

== See also == * [[List of exoplanets discovered in 2020]]

== References == {{Reflist|refs= <ref name="SIMBAD">{{cite simbad|title=CD-39 7945|access-date=2025-04-25}}</ref> <ref name="GaiaDR3">{{Cite Gaia DR3|6140553127216043648}}</ref> <ref name=constellation>{{cite constellation|TOI-763}}</ref> <ref name=adrien2024>{{cite journal |last1=Leleu |first1=Adrien |last2=Delisle |first2=Jean-Baptiste |last3=Burn |first3=Remo |last4=Izidoro |first4=André |last5=Udry |first5=Stéphane |last6=Dumusque |first6=Xavier |last7=Lovis |first7=Christophe |last8=Millholland |first8=Sarah |last9=Parc |first9=Léna |last10=Bouchy |first10=François |last11=Bourrier |first11=Vincent |last12=Alibert |first12=Yann |last13=Faria |first13=João |last14=Mordasini |first14=Christoph |last15=Ségransan |first15=Damien |title=Resonant sub-Neptunes are puffier |journal=Astronomy & Astrophysics |date=2024 |volume=687 |pages=L1 |doi=10.1051/0004-6361/202450587 |bibcode=2024A&A...687L...1L |arxiv=2406.18991 }}</ref> <ref name="Fridlund2020">{{Cite journal |last1=Fridlund |first1=M |last2=Livingston |first2=J |last3=Gandolfi |first3=D |last4=Persson |first4=C M |last5=Lam |first5=K W F |last6=Stassun |first6=K G |last7=Hellier |first7=C |last8=Korth |first8=J |last9=Hatzes |first9=A P |last10=Malavolta |first10=L |last11=Luque |first11=R |last12=Redfield |first12=S |last13=Guenther |first13=E W |last14=Albrecht |first14=S |last15=Barragan |first15=O |date=2020-10-01 |title=The TOI-763 system: sub-Neptunes orbiting a Sun-like star |journal=Monthly Notices of the Royal Astronomical Society |volume=498 |issue=3 |pages=4503–4517 |doi=10.1093/mnras/staa2502 |doi-access=free |issn=0035-8711 |arxiv=2008.12535 |bibcode=2020MNRAS.498.4503F}}</ref> <ref name=dl2025>{{cite journal |last1=De Laverny |first1=Patrick |last2=Ligi |first2=Roxanne |last3=Crida |first3=Aurélien |last4=Recio-Blanco |first4=Alejandra |last5=Palicio |first5=Pedro A. |title=The ''Gaia'' spectroscopic catalogue of exoplanets and host stars |journal=Astronomy & Astrophysics |date=2025 |volume=699 |pages=A100 |arxiv=2505.22205 |bibcode=2025A&A...699A.100D |doi=10.1051/0004-6361/202554739 }}</ref> }}

[[Category:Centaurus]] [[Category:Planetary systems with two confirmed planets]] [[Category:G-type main-sequence stars]] [[Category:Durchmusterung objects|CD-39 07945]] [[Category:TESS Objects of Interest|0763]]