 Artist's impression of HD 63433 d as compared with Earth | |
| Discovery | |
|---|---|
| Discovered by | Capistrant, Soares-Furtado et al. (THYME)[1] |
| Discovery date | 10 January 2024[1] |
| Transit[2] | |
| Designations | |
| TOI-1726 d, BD+27 1490 d, HIP 38228 d, V377 Geminorum d | |
| Orbital characteristics[1] | |
| 0.0503+0.0025 −0.0027 AU | |
| Eccentricity | 0.16+0.36 −0.12 |
| 4.20975+0.000012 −0.000023 d | |
| Inclination | 88.73°+0.85° −1.06° |
| Star | HD 63433 |
| Physical characteristics[1] | |
| 1.073+0.046 −0.044 R🜨 | |
| 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, HD 63433 b and c, were 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]
- ^ a b c d e f g h Capistrant, 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.
- ^ a b c Robert, 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
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