Comet Nucleus Dust and Organics Return (CONDOR) is a mission concept to retrieve a sample from comet 67P/Churyumov–Gerasimenko[1][2] to test ideas regarding Solar System formation, and accretion of rocky planets with habitable surface environments.
CONDOR is a concept by a NASA's Jet Propulsion Laboratory team led by Christopher Guethe and M. Choukroun.
Overview
editThe concept was proposed in 2017 to NASA's New Frontiers program to compete for their Mission 4, but it was not selected. Had it been developed and launched, CONDOR would collect and return a ≥ 50 g sample from the surface of comet 67P/Churyumov-Gerasimenko (also called simply 67P) for detailed analysis in terrestrial laboratories. This comet was previously investigated by the Rosetta mission between 2014 and 2016. The CONDOR concept calls for a Lockheed-Martin A2100 bus with a solar electric propulsion system.[1]
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In addition of performing a sample return down to 15 cm depth, it would carry a small payload comprising a narrow angle camera and a millimeter-wave radiometer to select a sampling site, and perform a gravity science investigation to compare changes of 67P since Rosetta.[1] Following a survey for site selection, the sample retrieval would be a fast touch-and-go event. The sample would be stored at ≤ -20 °C and sent to Earth on a Stardust-based capsule for extensive analyses not yet possible by robotic spacecraft. The return trip is estimated to take 12.4 years.[1]
| Event | Proposed time table |
|---|---|
| Launch | 16 June 2024 |
| 67P Arrival | 25 April 2029 |
| Reconnaissance | 25 April 2029 – 31 March 2030 |
| Sample acquisition | 31 March 2030 – 9 September 2030 |
| Departure to Earth | 10 December 2033 |
| Arrival to Earth | 8 November 2036 |
Science
editThe elements, except for hydrogen and helium, ultimately derive from stellar nucleosynthesis. The very basic chemical ingredients of life—the carbon-hydrogen molecule (CH, or methylidyne radical), the carbon-hydrogen positive ion (CH+) and the carbon ion (C+)—are the result, in large part, of ultraviolet light from stars.[3] Complex molecules, including organic molecules, form naturally both in space and on planets.[4] Links between these materials and Earth's prebiotic organic matter are unknown, and can only be probed on samples that contain pristine organic compounds. This mission would provide the first well-preserved sample from the outer Solar System to test ideas regarding Solar System formation, and accretion of rocky planets with habitable surface environments.[1]
See also
edit- Abiogenesis – Life arising from non-living matter
- Comet Rendezvous, Sample Acquisition, Investigation, and Return (CORSAIR) — A competing concept for New Frontiers 4
- List of missions to comets
- List of interstellar and circumstellar molecules
References
edit- ^ a b c d e COmet Nucleus Dust and Organics Return (CONDOR): a New Frontiers 4 Mission Proposal. (PDF) M. Choukroun, C. Raymond, M. Wadhwa. EPSC Abstracts. Vol. 11, EPSC2017-413, 2017. European Planetary Science Congress 2017.
- ^ "Proposed New Frontiers Missions". Future Planetary Exploration. 4 August 2017. Archived from the original on 20 September 2017. Retrieved 2017-09-20.
- ^ Landau, Elizabeth (12 October 2016). "Building Blocks of Life's Building Blocks Come From Starlight". NASA. Retrieved 13 October 2016.
- ^ Ehrenfreund, Pascale; Cami, Jan (December 2010). "Cosmic carbon chemistry: from the interstellar medium to the early Earth". Cold Spring Harbor Perspectives in Biology. 2 (12). Cold Spring Harbor, NY: Cold Spring Harbor Laboratory Press: a002097. doi:10.1101/cshperspect.a002097. ISSN 1943-0264. PMC 2982172. PMID 20554702.