“Athena (spacecraft)”的意思、由来-开放百科全书

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Athena (spacecraft)

释义

Objectives
References

{{Distinguish|Athena (satellite)|Athena (rocket family)|Advanced Telescope for High Energy Astrophysics|Athena-Fidus}}{{Infobox spaceflight
| name = Athena
| names_list =
| image =
| image_caption =
| image_size =
| mission_type = Asteroid flyby
| operator = NASA
| COSPAR_ID =
| SATCAT =
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| spacecraft =
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| manufacturer =
| launch_mass = ≈ {{cvt|182|kg|abbr=on}}
| BOL_mass =
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| dimensions =
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| launch_date = Proposed: 2022
| launch_rocket =
| launch_site =
| launch_contractor =
|interplanetary =
|type = flyby
|object = 2 Pallas
|arrival_date = 2024
|distance =
| trans_band =
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}}Athena is a proposed space mission that would perform a single flyby of asteroid 2 Pallas, the third largest asteroid in the Solar System.^[1]

If Athena is funded, it would share the launch vehicle with the Psyche spacecraft and fly its own trajectory for a Mars gravity assist to slingshot into the asteroid belt. It would take about two years to reach Pallas.^[1] The mission's Principal Investigator is Joseph O'Rourke, at Arizona State University.

Objectives

The science goals and objectives include: ^[2]

to determine how differentiation varies on bodies with large proportions of ices and how they and evolved over time.
to determine how the current population of asteroids evolved in time and space.
to understand the role of water in the evolution of Pallas.
to constrain the dynamical evolution of Pallas and asteroids in the Pallas impact family.

Athena would conduct visible imaging of the geology of Pallas with a miniature color (RGB) camera. Also, a radio science experiment would use continuous antenna pointing to Earth for two-way Doppler tracking to enable the determination of the mass of Pallas with a precision of <0.05%.^[2]

References

1. ^¹ {{cite news |last=Dorminey |first=Bruce |title=Proposed NASA SmallSat Mission Could Be First To Visit Pallas, Our Third Largest Asteroid |url=https://www.forbes.com/sites/brucedorminey/2019/03/10/proposed-nasa-smallsat-mission-could-be-first-to-visit-pallas-our-third-largest-asteroid |date=10 March 2019 |work=Forbes |accessdate=March 10, 2019 }}
2. ^¹ [https://www.hou.usra.edu/meetings/lpsc2019/pdf/2225.pdf Athena: the first-ever encounter of (2) Pallas with a Smallsat.] J. G. O'Rourke, J. Castillo-Rogez, L. T. Elkins-Tanton, R. R. Fu, T. N. Harrison, S. Marchi, R. Park, B. E. Schmidt, D. A. Williams, C. C. Seybold, R. N. Schindhelm, J. D. Weinberg. 50th Lunar and Planetary Science Conference 2019 (LPI Contrib. No. 2132).

{{Planetary Missions Program Office|Discovery=y}}{{Asteroid spacecraft}}{{portal bar|Astronomy|Spaceflight}}{{US-spacecraft-stub}}

2 : Missions to main-belt asteroids|Proposed NASA space probes

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