AIDA (mission)

For other uses, see Aida (disambiguation).
AIDA
Mission type Asteroid probe
Operator European Space Agency, NASA
Website AIDA study
Spacecraft properties
Launch mass DART: 300 kg (660 lb)
AIM:
Start of mission
Launch date AIM: October 2020[1] (proposed)
DART: July 2021 (proposed)
Rocket AIM: Vega[2]
DART: Minotaur V[3]
(65803) Didymos[4][5] orbiter
Spacecraft component AIM
Orbital insertion October 2022 (proposed)
(65803) Didymos[5] impactor

The Asteroid Impact & Deflection Assessment (AIDA) mission is a proposed space probe which would study and demonstrate the kinetic effects of crashing an impactor spacecraft into an asteroid moon. The mission is intended to test whether a spacecraft could successfully deflect an asteroid on a collision course with Earth.[6] It would be composed of two spacecraft: AIM, which would orbit the asteroid and DART, which would impact its moon.

As of 2015, the mission was still in the conceptual phase with a proposed launch for AIM in October 2020, and for DART in July 2021. The impact of DART would be in October 2022 during a close approach to Earth.[7][8]

Collaboration

The AIDA mission is a joint international collaboration of the European Space Agency (ESA), the German Aerospace Center (DLR), Observatoire de la Côte d'Azur (OCA), NASA, and Johns Hopkins University Applied Physics Laboratory (JHU/APL).[4] The project was formed by joining two separate studies, called Double Asteroid Redirection Test (DART), an asteroid impactor developed by NASA, and a monitoring spacecraft - ESA's Asteroid Impact Mission (AIM).[4]

Mission design

AIDA would target 65803 Didymos, a binary asteroid system in which one asteroid is orbited by a smaller one. The primary asteroid is about 800 m (2,600 ft) in diameter; its small satellite is about 150 m (490 ft) in diameter in an orbit about 1.1 km from the primary. Didymos is not an Earth-crossing asteroid, and there is no possibility that the deflection experiment could create an impact hazard.[9] The assessment is ongoing.

Under the current proposal, AIM would launch in October 2020, and DART in July 2021. AIM would orbit the larger asteroid and study the composition of it and its moon. DART would then impact the moon on October 2022, during a close approach to Earth.[10][8] AIM would study in situ the effect on its orbit around the larger asteroid. An equal timing of the experiment is set for both missions, and both spacecraft would be able to operate independently.

The impact of the 300 kg (660 lb) DART spacecraft at 6.25 km/s will produce a velocity change on the order of 0.4 mm/s, which leads to a significant change in the mutual orbit of these two objects, but only a minimal change in the heliocentric orbit of the system.[3][4][9] AIDA will provide data on the asteroid's strength, surface physical properties and its internal structure. There is great benefit to obtain the size of the resulting impact crater in addition to the momentum transfer measurement, as the effects of porosity and strength of the target are needed to calculate the momentum transfer efficiency.[4][9]

Fly-by of Orpheus

The AIDA mission is also proposed to make a fly-by observation of asteroid 3361 Orpheus during its trajectory to 65803 Didymos.[11]

Proposed payload

The payload is under assessment, and the notional requirements are:[3][9]

AIM
DART

DART is a 300 kg (660 lb) impactor that hosts no scientific payload other than a 20-cm aperture CCD camera to support autonomous guiding to impact the target body through its center.

Status

Both AIM and DART have been approved for a Phase A/B1 study, starting in February 2015 for fifteen months.[9]

See also

References

  1. ↑ Winder, Jenny (6 April 2015). "Design work begins on asteroid lander mission". SEN News. Retrieved 2015-04-07.
  2. ↑ ASTEROID INVESTIGATION MISSION: THE EUROPEAN CONTRIBUTION TO THE AIDA EU-US COOPERATION. ESA, 2014.
  3. 1 2 3 Cheng, A.F.; Michel, P.; Reed, C.; Galvez, A.; Carnelli, I. (2012). DART: Double Asteroid Redirection Test (PDF). European Planetary Science Congress 2012. EPSC Abstracts. Bibcode:7 EPSC2012-935-1 2012 Vol. 7 EPSC2012-935-1 2012.
  4. 1 2 3 4 5 Asteroid Impact & Deflection Assessment (AIDA) study.
  5. 1 2 "AIDA study". ESA. 19 December 2012. Retrieved 2014-09-19.
  6. ↑ AIDA mission rationale. ESA, 25 May 2012.
  7. ↑ Asteroid Impact & Deflection Assessment (AIDA) study.
  8. 1 2 Miriam Kramer (26 March 2013). "Asteroid Deflection Mission AIDA Set To Crash Two Spacecraft Into Space Rock In 2022". Huffington Post. Retrieved 2014-09-19.
  9. 1 2 3 4 5 "AIDA: Asteroid Impact and Deflection Assesment mission under study at ESA and NASA" (PDF). Observatoire de la Côte d'Azur. February 2015. Retrieved 2015-03-29.
  10. ↑ Asteroid Impact & Deflection Assessment (AIDA) study.
  11. ↑ A.F. Cheng et al., "Asteroid Impact & Deflection Assessment mission: Kinetic impactor," Planetary and Space Science (Available online 4 January 2016)
  12. ↑ Cubesat Companions for ESA's Astroid [sic] Mission. Source: ESA. November 2, 2015.

External links

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