Ground-track resonances around Vesta: potential threats for Dawn?

Research output: Contribution in Book/Catalog/Report/Conference proceedingConference contribution

4 Downloads (Pure)

Abstract

The aim of Dawn mission is the acquisition of data from orbits around (4)-Vesta and (1)-Ceres, the two most massive asteroids. Due to the low thrust propulsion, Dawn will slowly transit through ground-track resonances (abbreviated by GTR), where the perturbations on Dawn orbit may be significant. In this context, to safety go the Dawn mission from the approach to the lowest orbit, it is essential to know the properties of the crossed resonances. We analytically investigate one of the properties of the 2:3 GTR. This resonance makes the eccentricity of Dawn increase until 0.2. Then the radius of the Dawn orbit changes about 260 km dangerously leading Dawn nearer to Vesta. We determine that this increases is due to the C22 coefficients (characterizing the equatorial ellipticity of the asteroid).
Original languageEnglish
Title of host publicationEPSC-DPS2011-209, 2011
Volume6
Publication statusUnpublished - 2011

Fingerprint

ground tracks
orbits
asteroids
low thrust propulsion
ellipticity
transit
eccentricity
safety
acquisition
perturbation
radii
coefficients

Cite this

Delsate, N. (2011). Ground-track resonances around Vesta: potential threats for Dawn?. Unpublished In EPSC-DPS2011-209, 2011 (Vol. 6)
@inproceedings{c60814796a194566839f8088a5f79c88,
title = "Ground-track resonances around Vesta: potential threats for Dawn?",
abstract = "The aim of Dawn mission is the acquisition of data from orbits around (4)-Vesta and (1)-Ceres, the two most massive asteroids. Due to the low thrust propulsion, Dawn will slowly transit through ground-track resonances (abbreviated by GTR), where the perturbations on Dawn orbit may be significant. In this context, to safety go the Dawn mission from the approach to the lowest orbit, it is essential to know the properties of the crossed resonances. We analytically investigate one of the properties of the 2:3 GTR. This resonance makes the eccentricity of Dawn increase until 0.2. Then the radius of the Dawn orbit changes about 260 km dangerously leading Dawn nearer to Vesta. We determine that this increases is due to the C22 coefficients (characterizing the equatorial ellipticity of the asteroid).",
author = "Nicolas Delsate",
year = "2011",
language = "English",
volume = "6",
booktitle = "EPSC-DPS2011-209, 2011",

}

Ground-track resonances around Vesta: potential threats for Dawn? / Delsate, Nicolas.

EPSC-DPS2011-209, 2011. Vol. 6 2011.

Research output: Contribution in Book/Catalog/Report/Conference proceedingConference contribution

TY - GEN

T1 - Ground-track resonances around Vesta: potential threats for Dawn?

AU - Delsate, Nicolas

PY - 2011

Y1 - 2011

N2 - The aim of Dawn mission is the acquisition of data from orbits around (4)-Vesta and (1)-Ceres, the two most massive asteroids. Due to the low thrust propulsion, Dawn will slowly transit through ground-track resonances (abbreviated by GTR), where the perturbations on Dawn orbit may be significant. In this context, to safety go the Dawn mission from the approach to the lowest orbit, it is essential to know the properties of the crossed resonances. We analytically investigate one of the properties of the 2:3 GTR. This resonance makes the eccentricity of Dawn increase until 0.2. Then the radius of the Dawn orbit changes about 260 km dangerously leading Dawn nearer to Vesta. We determine that this increases is due to the C22 coefficients (characterizing the equatorial ellipticity of the asteroid).

AB - The aim of Dawn mission is the acquisition of data from orbits around (4)-Vesta and (1)-Ceres, the two most massive asteroids. Due to the low thrust propulsion, Dawn will slowly transit through ground-track resonances (abbreviated by GTR), where the perturbations on Dawn orbit may be significant. In this context, to safety go the Dawn mission from the approach to the lowest orbit, it is essential to know the properties of the crossed resonances. We analytically investigate one of the properties of the 2:3 GTR. This resonance makes the eccentricity of Dawn increase until 0.2. Then the radius of the Dawn orbit changes about 260 km dangerously leading Dawn nearer to Vesta. We determine that this increases is due to the C22 coefficients (characterizing the equatorial ellipticity of the asteroid).

M3 - Conference contribution

VL - 6

BT - EPSC-DPS2011-209, 2011

ER -