EChO
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| Mission type | Astronomy |
|---|---|
| Operator | ESA |
| SATCAT no. | Template:Wd |
| Website | sci.esa.int/echo |
| Mission duration | 4–5 years[1][2] |
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| Spacecraft properties | |
| Launch mass | 2,100 kg (4,600 lb)[3] |
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| Start of mission | |
| Launch date | 2024[1] |
| Rocket | Soyuz STA/Fregat[2] |
| Launch site | Kourou ELS[3] |
| Contractor | Arianespace |
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| Orbital parameters | |
| Reference system | Sun–Earth L2[2][3] |
| Regime | Halo or Lissajous |
| Epoch | planned |
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| Main telescope | |
| Type | Cassegrain[2] |
| Diameter | 1.4 m (4.6 ft)[2] |
| Focal length | 2 m (6.6 ft)[2] |
| Collecting area | 14 m2 (150 sq ft)[2] |
| Wavelengths | from 0.55 μm (orange) to 11μm (long-infrared) (goal: 0.4 to 16 μm)[1][2] |
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The Exoplanet Characterisation Observatory (EChO) was a proposed space telescope[2] as part of the Cosmic Vision roadmap of the European Space Agency, and competed with four other missions for the M3 slot in the programme. On 19 February 2014 the PLATO mission was selected in place of the other candidates in the programme, including EChO.[4]
EChO would have been the first dedicated mission to investigate exoplanetary atmospheres, addressing the suitability of those planets for life and placing the Solar System in context. EChO was intended to provide high resolution, multi-wavelength spectroscopic observations. It would have measured the atmospheric composition, temperature and albedo of a representative sample of known exoplanets, constrain models of their internal structure and improve understanding of how planets form and evolve.[5] It would have orbited around the L2 Lagrange point, 1.5 million km from Earth in the anti-sunward direction.
SPEChO
Following PLATO's M3 selection, a proposal to add EChO on the joint Japanese-European SPICA far-infrared telescope emerged.[6] The proposed EChO instrument on SPICA (SPEChO) is a spectrometer covering light wavelengths from 5 to 20 micrometres, and will observe exoplanet atmospheres utilizing transit spectroscopy.[6][7] As long with a potential to recover the original scientific goals from EChO, SPEChO will enable SPICA to conduct specialized exoplanetary science studies. SPEChO may also be useful for the science case of galaxies.[8]
However SPEChO's capabilities overlap with the James Webb Space Telescope's MIRI (Mid-Infrared Instrument), therefore SPEChO's advantages over other instruments has become a focus of whether or not to include it on SPICA.[6][9]
Other M3 mission candidates
References
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- ^ a b c Page Module:Citation/CS1/styles.css has no content."EChO mission summary". EChO website. ESA. 16 December 2013. Retrieved 28 January 2014.
- ^ a b c d e f g h i Page Module:Citation/CS1/styles.css has no content.Tinetti, G.; Beaulieu, J. P.; Henning, T.; Meyer, M.; Micela, G.; Ribas, I.; Stam, D.; Swain, M.; Krause, O.; Ollivier, M.; Pace, E.; Swinyard, B.; Aylward, A.; Boekel, R.; Coradini, A.; Encrenaz, T.; Snellen, I.; Zapatero-Osorio, M. R.; Bouwman, J.; Cho, J. Y. K.; Coudé De Foresto, V.; Guillot, T.; Lopez-Morales, M.; Mueller-Wodarg, I.; Palle, E.; Selsis, F.; Sozzetti, A.; Ade, P. A. R.; Achilleos, N.; et al. (2012). "EChO - Exoplanet Characterisation Observatory" (PDF). Experimental Astronomy. 34 (2): 311. arXiv:1112.2728. Bibcode:2012ExA....34..311T. doi:10.1007/s10686-012-9303-4. S2CID 118578814. Archived from the original (PDF) on 2017-09-22. Retrieved 2018-10-23.
- ^ a b c Page Module:Citation/CS1/styles.css has no content."EChO spacecraft". EChO website. ESA. 30 June 2013. Retrieved 28 January 2014.
- ^ Page Module:Citation/CS1/styles.css has no content."ESA selects planet-hunting PLATO mission". ESA. 19 February 2014. Retrieved 20 March 2014.
- ^ Page Module:Citation/CS1/styles.css has no content.Tinetti, G.; Cho, J. Y. K.; Griffith, C. A.; Grasset, O.; Grenfell, L.; Guillot, T.; Koskinen, T. T.; Moses, J. I.; Pinfield, D.; Tennyson, J.; Tessenyi, M.; Wordsworth, R.; Aylward, A.; Van Boekel, R.; Coradini, A.; Encrenaz, T.; Snellen, I.; Zapatero-Osorio, M. R.; Bouwman, J.; Du Foresto, V. C.; Lopez-Morales, M.; Mueller-Wodarg, I.; Pallé, E.; Selsis, F.; Sozzetti, A.; Beaulieu, J. P.; Henning, T.; Meyer, M.; Micela, G.; et al. (2011). "The science of EChO" (PDF). Proceedings of the International Astronomical Union. 6: 359–370. Bibcode:2011IAUS..276..359T. doi:10.1017/S1743921311020448.
- ^ a b c Page Module:Citation/CS1/styles.css has no content."SPICA計画の経緯・現状" (PDF) (in 日本語). Japan Radio Astronomy Forum. 28 January 2015. Archived from the original (PDF) on 2017-01-03. Retrieved 2017-01-03.
- ^ Page Module:Citation/CS1/styles.css has no content."SPICAの現状" (PDF). Institute for the Physics and Mathematics of the Universe. 5 June 2015. Retrieved 2017-01-03.
- ^ Page Module:Citation/CS1/styles.css has no content."SPICAサイエンス検討中間報告" (PDF) (in 日本語). Group of Optical and Infrared Astronomers SPICA task force. 26 November 2014. Retrieved 2017-01-03.
- ^ Page Module:Citation/CS1/styles.css has no content."タスクフォースからの提言 近傍銀河および星惑星系形成分野" (PDF) (in 日本語). Group of Optical and Infrared Astronomers SPICA task force. 26 November 2014. Retrieved 2017-01-03.
External links
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