Rendezvous to asteroid with highly uncertain ephemeris: Hayabusa2’s Ryugu-approach operation result

Tsuda, Yuichi; Takeuchi, Hiroshi; Ogawa, Naoko; Ono, Go; Kikuchi, Shota; Oki, Yusuke; Ishiguro, Masateru; Kuroda, D.; Urakawa, Seitaro; Okumura, Shin-ichiro

doi:10.1007/s42064-020-0074-9

Cited by 22 publications

(9 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Scientific Constraints On Proximity Operations Around the Target Asteroidsmentioning

confidence: 99%

“…However, the constraints on HP (and even whether we define HP for the extended mission) strongly depend on engineering conditions such as the determination of the spacecraft's relative orbit to the target object (Tsuda et al, 2020) and descent operations (Ono et al, 2020). For Ryugu, a hybrid approach that combined radiometric-optical navigation and a stochastic-constrained optimum guidance method achieved reducing a relative position uncertainty of less than 100 m and a relative velocity uncertainty of less than 1 cm/s (Tsuda et al, 2020). The nominal mission conducted descent operations by using a ground control point navigation (GCP-NAV), in which guidance, navigation, and control (GNC) processes were conducted based on on-board and on-ground guidance systems and image-based navigation techniques (Ono et al, 2020).…”

Section: Scientific Constraints On Proximity Operations Around the Ta...mentioning

confidence: 99%

See 1 more Smart Citation

Hayabusa2 extended mission: New voyage to rendezvous with a small asteroid rotating with a short period

Hirabayashi

Mimasu

Sakatani

et al. 2021

Advances in Space Research

View full text Add to dashboard Cite

show abstract

Section: Scientific Constraints On Proximity Operations Around the Target Asteroidsmentioning

confidence: 99%

Section: Scientific Constraints On Proximity Operations Around the Ta...mentioning

confidence: 99%

Hayabusa2 extended mission: New voyage to rendezvous with a small asteroid rotating with a short period

Hirabayashi

Mimasu

Sakatani

et al. 2021

Advances in Space Research

View full text Add to dashboard Cite

show abstract

“…Interceptor satellites must first rendezvous with asteroids through orbital manoeuvres [24]. Then, the asteroid impulse generator applies an impulse force to the asteroid after the interceptor satellite makes rendezvous contact with the asteroid to alter the motion of the asteroid.…”

Section: Remarkmentioning

confidence: 99%

Multisatellite Task Allocation and Orbit Planning for Asteroid Terminal Defence

et al. 2022

View full text Add to dashboard Cite

Near-Earth asteroids are a great threat to the Earth, especially potential rendezvous and collision asteroids. To protect the Earth from an asteroid collision, it is necessary to investigate the asteroid defence problem. An asteroid terminal defence method based on multisatellite interception was designed in this study. For an asteroid intruding in the sphere of the gravitational influence of the Earth, multiple interceptor satellites are used to apply a kinetic energy impulse to deflect the orbit of the asteroid. First, the effects of planned interception time and planned interception position on the required impulse velocity increment applied to the asteroid are assessed for interception opportunity selection. Second, multiple interceptor satellites are selected to perform the defence task from the on-orbit available interceptor satellite formation. An improved contract net protocol algorithm considering the Lambert orbital manoeuvre is designed to fulfil the task allocation and satellite orbit planning. Finally, simulation experiments demonstrate the rationale and effectiveness of the proposed method, which provides support for asteroid terminal defence technology.

show abstract

“…Even though the capability of the ground-based observation has been dramatically increased, some small celestial bodies with lower albedos still cannot be recognized, such as the asteroid 2019 OK [3]. Therefore, asteroids have attracted more and more attention and become hot spots for space explorations [4][5][6][7][8][9][10][11]. If its orbit deviates slightly due to other perturbations such as the tidal effect, it is possible for it to collide with the Earth.…”

Section: Introductionmentioning

confidence: 99%

The Coupling Orbit–Attitude–Structure Evolution of Rubble-Pile Asteroid with Earth Flyby in the Restricted Three-Body Problem

et al. 2022

View full text Add to dashboard Cite

Some asteroids flying close to Earth may pose a threat of impact. Among them, the structural and dynamical characteristics of rubble-pile asteroids can be changed because of the tidal force of the Earth in this process. This can provide key information for predicting the dynamical evolution of potentially hazardous asteroids. In this study, the long-term evolution of the coupling orbit–attitude–structure of these small bodies is presented numerically based on the integration of two models. One is the 3D discrete element method, which models the structure and irregular shape of the rubble-pile asteroid. The other is the dynamical model of the circular restricted three-body problem (CRTBP). This provides a more precise dynamical environment of the asteroid orbital deflection, morphological modification, and attitude angles analysis compared to the frequently adopted two-body problem. Parametric studies on the asteroid evolution were performed focusing on its flyby distance and the bulk porosity. Numerical results indicate that the Earth flyby can form different patterns of modification of asteroids, where the rubble-pile structure can be destructed by considering the bulk porosity. The asteroid orbital deflection and attitude variational trends are also summarized based on the simulations of multi-orbital revolutions.

show abstract

Rendezvous to asteroid with highly uncertain ephemeris: Hayabusa2’s Ryugu-approach operation result

Cited by 22 publications

References 8 publications

Hayabusa2 extended mission: New voyage to rendezvous with a small asteroid rotating with a short period

Hayabusa2 extended mission: New voyage to rendezvous with a small asteroid rotating with a short period

Multisatellite Task Allocation and Orbit Planning for Asteroid Terminal Defence

The Coupling Orbit–Attitude–Structure Evolution of Rubble-Pile Asteroid with Earth Flyby in the Restricted Three-Body Problem

Contact Info

Product

Resources

About