Hayabusa2’s superior solar conjunction mission operations: planning and post-operation results View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2020-11-02

AUTHORS

Stefania Soldini, Hiroshi Takeuchi, Sho Taniguchi, Shota Kikuchi, Yuto Takei, Go Ono, Masaya Nakano, Takafumi Ohnishi, Takanao Saiki, Yuichi Tsuda, Fuyuto Terui, Naoko Ogawa, Yuya Mimasu, Tadateru Takahashi, Atsushi Fujii, Satoru Nakazawa, Kent Yoshikawa, Yusuke Oki, Chikako Hirose, Hirotaka Sawada, Tomohiro Yamaguchi, Makoto Yoshikawa

ABSTRACT

In late 2018, the asteroid Ryugu was in the Sun’s shadow during the superior solar conjunction phase. As the Sun-Earth-Ryugu angle decreased to below 3°, the Hayabusa2 spacecraft experienced 21 days of planned blackout in the Earth-probe communication link. This was the first time a spacecraft had experienced solar conjunction while hovering around a minor body. For the safety of the spacecraft, a low energy transfer trajectory named Ayu was designed in the Hill reference frame to increase its altitude from 20 to 110 km. The trajectory was planned with the newly developed optNEAR tool and validated with real time data. This article shows the results of the conjunction operation, from planning to flight data. More... »

PAGES

265-288

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s42064-020-0076-7

DOI

http://dx.doi.org/10.1007/s42064-020-0076-7

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1132296138


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11 schema:description In late 2018, the asteroid Ryugu was in the Sun’s shadow during the superior solar conjunction phase. As the Sun-Earth-Ryugu angle decreased to below 3°, the Hayabusa2 spacecraft experienced 21 days of planned blackout in the Earth-probe communication link. This was the first time a spacecraft had experienced solar conjunction while hovering around a minor body. For the safety of the spacecraft, a low energy transfer trajectory named Ayu was designed in the Hill reference frame to increase its altitude from 20 to 110 km. The trajectory was planned with the newly developed optNEAR tool and validated with real time data. This article shows the results of the conjunction operation, from planning to flight data.
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18 schema:keywords Hayabusa2 spacecraft
19 Hill reference frame
20 Ryugu
21 Sun's shadow
22 Sun-Earth
23 altitude
24 angle
25 article
26 asteroid Ryugu
27 ayu
28 blackouts
29 body
30 communication links
31 conjunction
32 conjunction operation
33 conjunction phase
34 data
35 days
36 energy transfer
37 first time
38 flight data
39 frame
40 link
41 low-energy transfers
42 minor bodies
43 mission operations
44 operation
45 phase
46 planning
47 real-time data
48 reference frame
49 results
50 safety
51 shadow
52 solar conjunction
53 spacecraft
54 time
55 time data
56 tool
57 trajectories
58 transfer
59 schema:name Hayabusa2’s superior solar conjunction mission operations: planning and post-operation results
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