scholarly journals Analysis of the possibility of creating a stable satellite about the asteroid Apophis as a homogeneous triaxial ellipsoid

2019 ◽  
Vol 489 (1) ◽  
pp. 27-33 ◽  
Author(s):  
V. V. Ivashkin ◽  
Peng Guo
Keyword(s):  
Solar Radiation ◽  
Radiation Pressure ◽  
Solar Radiation Pressure ◽  
Triaxial Ellipsoid ◽  
Stable Orbit ◽  
Celestial Bodies ◽  
Radio Measurements ◽  
Radio Beacon

The task of creating a stable orbit of the Apophis asteroid satellite as a homogeneous triaxial ellipsoid is investigated. The simulation of the motion of the spacecraft around the asteroid was performed taking into account the main perturbations: from the attraction of celestial bodies, asteroids non-sphericity and solar radiation pressure, and taking into account the asteroids own rotation. It is shown that it is possible to create a stable orbit of an asteroid satellite. This orbit can be used for a detailed study of the characteristics of the asteroid and the refinement of its orbit using ground radio measurements of the motion of a satellite equipped with a radio beacon.

Seasonal variation of Mercury's exosphere deduced from MESSENGER data and simulation study

2020 ◽  
Author(s):  
Yudai Suzuki ◽  
Kazuo Yoshioka ◽  
Go Murakami ◽  
Ichiro Yoshikawa
Keyword(s):  
Seasonal Variation ◽  
Solar Radiation ◽  
Radiation Pressure ◽  
Seasonal Variability ◽  
Solar Radiation Pressure ◽  
Space Environment ◽  
Generation Process ◽  
Surface Transport ◽  
Celestial Bodies ◽  
The Impact

<p>Celestial bodies with surface-bound exosphere are valuable because we can directly see the interaction between the bodies and space environment to which they are exposed. This interaction is especially expected to be clearly observed around Mercury. This research aims to clarify the generation process of neutral sodium exosphere, through the comparison between the data from MASCS onboard MESSENGER spacecraft and 3-D model calculation considering generation, transportation and dissipation processes.</p><p>First, seasonal variability of the amount of sodium exosphere is analyzed for each local time (LT) using MASCS data. Previous research has shown that the amount of sodium above LT12 reaches a maximum at aphelion, and it is found that this maximum is seen only above LT12. In addition, two hypotheses proposed by the research: the increase in the surface sodium density of the dayside due to fast rotation of terminator, and the expansion of exosphere owing to weaker radiation pressure, were turned out to be inconsistent with seasonal variability above LT06 and the results of test particle calculations.</p><p>Following these results, in order to understand the key process of the seasonal variation of the amount of sodium especially around LT12, 3-D sodium exosphere model including release from the surface, transport due to gravity and solar radiation pressure, and dissipation due to ionization caused by solar radiation is constructed. The results from numerical calculation is consistent with the observations by MASCS in terms of the vertical profile and the seasonal variability above LT06 and LT18, but the maximum at aphelion above LT12 could not be reproduced. Then, when the existence of the impact of comet dust stream is assumed as a local and short-term sodium source, the model with impact of 10<sup>8</sup>kg comets per Mercury year could reproduce observations.</p><p>Using the model constructed in this study, the sodium distribution which would be observed by MSASI onboard MIO spacecraft is predicted. The comparison between the calculation and observation by MSASI will provide us new insights into the interaction between the celestial bodies and space environment.</p><p>In this presentation, we will summarize the results of comparison between observations by MASCS and 3-D Monte Carlo simulation about the seasonal variability of Mercury’s sodium exosphere.</p>

scholarly journals Dynamics of Satellites Around Asteroids in Presence of Solar Radiation Pressure

2015 ◽  
Vol 10 (S318) ◽  
pp. 259-264
Author(s):  
Xiaosheng Xin ◽  
Daniel J. Scheeres ◽  
Xiyun Hou ◽  
Lin Liu
Keyword(s):  
Solar Radiation ◽  
Radiation Pressure ◽  
Equilibrium Points ◽  
Equations Of Motion ◽  
Solar Radiation Pressure ◽  
Approximate Solutions ◽  
Triaxial Ellipsoid ◽  
Stability Maps ◽  
The Stability ◽  
Near Earth Asteroids

AbstractDue to the close distance to the Sun, solar radiation pressure (SRP) plays an important role in the dynamics of satellites around near-Earth asteroids (NEAs). In this paper, we focus on the equilibrium points of a satellite orbiting around an asteroid in presence of SRP in the asteroid rotating frame. The asteroid is modelled as a uniformly rotating triaxial ellipsoid. When SRP comes into play, the equilibrium points transformed into periodic orbits termed as``dynamical substitutes". We obtain the analytical approximate solutions of the dynamical substitutes from the linearised equations of motion. The analytical solutions are then used as initial guesses and are numerically corrected to compute the accurate orbits of the dynamical substitutes. The stability of the dynamical substitutes is analysed and the stability maps are obtained by varying parameters of the ellipsoid model as well as the magnitude of SRP.

Influence of Shape Change Caused by Warp of Thin-film Device on Solar Radiation Pressure Torque in Solar Sail

2020 ◽  
Vol 19 (0) ◽  
pp. 101-110
Author(s):  
Rikushi KATO ◽  
Masanori MATSUSHITA ◽  
Hideyuki TAKAHASHI ◽  
Osamu MORI ◽  
Nobukatsu OKUIZUMI ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Radiation ◽  
Radiation Pressure ◽  
Shape Change ◽  
Solar Radiation Pressure ◽  
Solar Sail ◽  
Thin Film Device

Effects of Solar Radiation Pressure on Earth Satellite Orbits

Science ◽  
1960 ◽  
Vol 131 (3404) ◽  
pp. 920-921 ◽  
Author(s):  
R. W. Parkinson ◽  
H. M. Jones ◽  
I. I. Shapiro
Keyword(s):  
Solar Radiation ◽  
Radiation Pressure ◽  
Solar Radiation Pressure ◽  
Earth Satellite ◽  
Satellite Orbits

A New Solar Radiation Pressure Model for GPS Satellites

GPS Solutions ◽  
1999 ◽  
Vol 2 (3) ◽  
pp. 50-62 ◽  
Author(s):  
T. A. Springer ◽  
G. Beutler ◽  
M. Rothacher
Keyword(s):  
Solar Radiation ◽  
Radiation Pressure ◽  
Solar Radiation Pressure ◽  
Gps Satellites

Modified empirical Solar Radiation Pressure model for IRNSS constellation

2017 ◽  
Vol 60 (10) ◽  
pp. 2146-2154 ◽  
Author(s):  
K. Rajaiah ◽  
K. Manamohan ◽  
S. Nirmala ◽  
S.C. Ratnakara
Keyword(s):  
Solar Radiation ◽  
Radiation Pressure ◽  
Solar Radiation Pressure
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