Tau Ceti e
| Discovery | |
|---|---|
| Discovery date | December 19, 2012 |
| Radial velocity | |
| Designations | |
| 52 Ceti e, Tau-e (Godzilla Anime Trilogy),Tau Ceti e, Adrian (Project Hail Mary), | |
| Orbital characteristics | |
| 0.552 AU | |
| 168 d | |
| Physical characteristics | |
| Mass | ≥3.93 M🜨 |
Tau Ceti e is a doubtful[1] exoplanet candidate proposed to be orbiting Tau Ceti, first detected in 2012 by statistical analyses of the star's variations in radial velocity obtained using HIRES, AAPS and HARPS.[2][3] Its possible properties were refined in 2017, where it was one of two planets recovered from new data, the other being Tau Ceti f. Studies published in 2021 and 2025 have been unable to confirm this existence of the planet.[1][4]
Properties
It would orbit at a distance of 0.552 AU (between the orbits of Venus and Mercury in the Solar System) with an orbital period of 168 days and has a minimum mass of 3.93 Earth masses.[5] If Tau Ceti e possesses an Earth-like atmosphere, the surface temperature would be around 68 °C (341 K; 154 °F).[6] Based upon the incident flux upon the planet, a study of planetary habitability by Güdel et al. (2014) suggested that the planet lies outside of the conservative habitable zone defined by the runaway greenhouse limit, but within the optimistic habitable zone defined by the "recent Venus" limit.[7]
In fiction
In Godzilla: Planet of the Monsters Tau Ceti e was the intended destination for the interstellar emigration ship Aratrum, which departed Earth in 2048 after Godzilla, became the planet’s dominant lifeform on the planet. After 22 years of space travel the Aratrum, arrives at it’s destination but finds the exoplanet to be completely inhospitable to human life, forcing the central committee to make the journey back to Earth, only to find that due to Time Dilation 20,000 years have past on earth.
In Andy Weir's 2021 science fiction novel, Project Hail Mary, along with the 2026 film adaptation, Tau Ceti serves as the primary present-day setting of the story and Tau Ceti e is given the name "Adrian" (after the character from the Rocky franchise) and serves as the setting for the climax of the story.[8]
References
- ↑ 1.0 1.1 Figueira, P.; Faria, J. P.; Silva, A. M.; Castro-González, A.; Gomes da Silva, J.; Sousa, S. G.; Bossini, D.; Zapatero-Osorio, M. R.; Balsalobre-Ruza, O.; Lillo-Box, J.; Tabernero, H. M.; Adibekyan, V.; Allart, R.; Benatti, S.; Bouchy, F. (August 2025). "A comprehensive study on radial velocity signals using ESPRESSO: Pushing precision to the 10 cm/s level". Astronomy & Astrophysics. 700: A174. doi:10.1051/0004-6361/202553869. ISSN 0004-6361.
- ↑ Tuomi, Mikko; Jones, Hugh R. A.; Jenkins, James S.; Tinney, Chris G.; Butler, R. Paul; Vogt, Steve S.; Barnes, John R.; Wittenmyer, Robert A.; O'Toole, Simon; Horner, Jonathan; Bailey, Jeremy (2013). "Signals embedded in the radial velocity noise. Periodic variations in the tau Ceti velocities". Astronomy & Astrophysics. 551: A79. arXiv:1212.4277. Bibcode:2013A&A...551A..79T. doi:10.1051/0004-6361/201220509. ISSN 0004-6361. Unknown parameter
|s2cid=ignored (help) - ↑ "Four Exoplanets Detected around Nearby Star Tau Ceti". Sci-News.com. 2017-08-10. Retrieved 2026-03-31.
- ↑ Cretignier, Michael; Dumusque, Xavier; et al. (September 2021). "YARARA: Significant improvement in RV precision through post-processing of spectral time series". Astronomy & Astrophysics. 653: A43. arXiv:2106.07301. Bibcode:2021A&A...653A..43C. doi:10.1051/0004-6361/202140986.
- ↑ Feng, Fabo; Tuomi, Mikko; Jones, Hugh R. A.; Barnes, John; Anglada-Escude, Guillem; Vogt, Steven S.; Butler, R. Paul (2017-09-05). "Color difference makes a difference: four planet candidates around tau Ceti". The Astronomical Journal. 154 (4): 135. arXiv:1708.02051. Bibcode:2017AJ....154..135F. doi:10.3847/1538-3881/aa83b4. ISSN 1538-3881. Unknown parameter
|s2cid=ignored (help) - ↑ Bignami, Giovanni F. (2015-06-13). The Mystery of the Seven Spheres: How Homo sapiens will Conquer Space. Springer. ISBN 978-3-319-17004-6. Search this book on
- ↑ Guedel, M.; Dvorak, R.; Erkaev, N.; Kasting, J.; Khodachenko, M.; Lammer, H.; Pilat-Lohinger, E.; Rauer, H.; Ribas, I.; Wood, B. E. (2014). "Astrophysical Conditions for Planetary Habitability". Protostars and Planets VI. arXiv:1407.8174. doi:10.2458/azu_uapress_9780816531240-ch038. ISBN 9780816531240. Unknown parameter
|s2cid=ignored (help) Search this book on
- ↑ Thompson, Joanna (2026-03-19). "I talked to Andy Weir about the astrobiology behind 'Project Hail Mary'". Space.com. Retrieved 2026-03-19.
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