Artist's impression of HD 63433 d and size comparison with Earth
Discovery
Discovered by
Capistrant, Soares-Furtado et al. (THYME)[1]
Discovery date
10 January 2024[1]
Detection method
Transit[2]
Designations
Alternative names
TOI-1726 d, BD+27 1490 d, HIP 38228 d, V377 Geminorum d
Orbital characteristics[1]
Semi-major axis
0.0503+0.0025 −0.0027 AU
Eccentricity
0.16+0.36 −0.12
Orbital period (sidereal)
4.20975+0.000012 −0.000023 d
Inclination
88.73°+0.85° −1.06°
Star
HD 63433
Physical characteristics[1]
Mean radius
1.073+0.046 −0.044R🜨
Temperature
1040±40 K(767 ± 40°C) (mean),[a], 1,530 K (1,260 °C) (daytime)[b]
HD 63433 d (TOI-1726 d) is a confirmed exoplanet orbiting HD 63433, a Sun-like star located 73 light-years away in the constellation Gemini.[3] Its radius is measured at around 1.1 R🜨, which makes it similar to the Earth in size.[1] It was the third (and most recent) exoplanet to be discovered in orbit around this star; the other two were HD 63433 b and c, discovered in 2020.[1][4] Orbiting its star at a distance of 0.0503 astronomical units (7,520,000 km), HD 63433 d is the innermost planet orbiting HD 63433, and completes an orbit around it just every 4 days.[1] Due to the proximity of its star, the planet is scorching hot, having a temperature estimated at 1260 °C at daytime.[4][1] The proximity of its star also causes it to be tidally locked.[4][5]
^ abcdefghCapistrant, Benjamin K.; Soares-Furtado, Melinda; Vanderburg, Andrew; Jankowski, Alyssa; Mann, Andrew W.; Ross, Gabrielle; Srdoc, Gregor; Hinkel, Natalie R.; Becker, Juliette; Magliano, Christian; Limbach, Mary Anne; Stephan, Alexander P.; Nine, Andrew C.; Tofflemire, Benjamin M.; Kraus, Adam L. (January 10, 2024). "TESS Hunt for Young and Maturing Exoplanets (THYME). XI. An Earth-sized Planet Orbiting a Nearby, Solar-like Host in the 400 Myr Ursa Major Moving Group". The Astronomical Journal. 167 (2): 54. arXiv:2401.04785. Bibcode:2024AJ....167...54C. doi:10.3847/1538-3881/ad1039. ISSN 1538-3881.
^Martin, Pierre-Yves (2024). "Planet HD 63433 b". exoplanet.eu. Retrieved 2024-01-12.
^de Lazaro, Enrico (January 15, 2023). "Earth-Sized Exoplanet Found Orbiting HD 63433". SciNews. Retrieved January 16, 2023.
^ abcRobert, Lea (January 12, 2024). "Newfound Earth-size exoplanet has a scorching-hot lava side". Space. Archived from the original on January 12, 2024. Retrieved January 12, 2024.
^Cite error: The named reference :1 was invoked but never defined (see the help page).
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).
HD63433d (TOI-1726 d) is a confirmed exoplanet orbiting HD63433, a Sun-like star located 73 light-years away in the constellation Gemini. Its radius...
HD63433 (TOI-1726, V377 Geminorum) is a G-type main sequence star located 73 light-years from Earth in the zodiacal constellation Gemini, visually close...
HD63433 c (TOI-1726 c) is a mini-Neptune exoplanet orbiting the Sun-like star HD63433. It is the outermost planet in its planetary system, being located...
; Mary, D.; Aguichine, A.; Deleuil, M.; Mena, E. Delgado (27 May 2024), "A low-mass sub-Neptune planet transiting the bright active star HD 73344", Astronomy...
Jupiter mass dividing line. 54 Piscium (HD 3651) HD 168443 Gliese 229 A Epsilon Indi A HD 82943 Pi Mensae HD 38529 HD 245134 Lists of exoplanets Methods of...
including WASP-107b, WASP-69b and HD 189733b. It has also been detected around some mini-Neptunes, such as TOI-560 b and HD63433 c. Sequestration is not a form...
Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W. Cardini, D. (January 2005), "Mg II chromospheric...
Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182. Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities"...
...135..209M, doi:10.1088/0004-6256/135/1/209, S2CID 121883397. Cardini, D. (January 2005), "Mg II chromospheric radiative loss rates in cool active...
Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W. Anderson, E.; Francis...
Retrieved 2016-12-08.{{cite web}}: CS1 maint: postscript (link) Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical...
Global Information