Celestia Forums

# This file contains the orbital elements for 6 Martian Trojan asteroids
# The Keplerian values were obtained from the IAU's Minor Planet Center
# at http://cfa-www.harvard.edu/iau/mpc.html
# using the data on their page
# http://cfa-www.harvard.edu/iau/lists/MarsTrojans.html
# and reformatted for Celestia
# by Selden Ball seb+cel@lns.cornell.edu 14-Sep-2002

"1561 Eureka" "Sol"
{
Class "asteroid"
Mesh "asteroid.cms"
Texture "asteroid.jpg"
Radius 2.0 #guess from AbsMag & arbitrary Albedo

EllipticalOrbit
{
Period 1.8809 #set same as Mars
SemiMajorAxis 1.5237 #table: 1.524 #set same as Mars
Eccentricity 0.065
Inclination 20.3
AscendingNode 245.1
ArgOfPericenter 95.4
MeanAnomaly 149.52
Epoch 2452613.5
}
Albedo 0.1 #arbitrary
RotationPeriod 30.0
}

"MPO 10873" "Sol"
{
Class "asteroid"
Mesh "asteroid.cms"
Texture "asteroid.jpg"
Radius 1.5

EllipticalOrbit
{
Period 1.8809
SemiMajorAxis 1.5237 #1.524
Eccentricity 0.1
Inclination 31.3
AscendingNode 221.4
ArgOfPericenter 310.4
MeanAnomaly 307.35
Epoch 2452613.5
}
Albedo 0.1
RotationPeriod 30.0
}

"MPO 27649" "Sol"
{
Class "asteroid"
Mesh "asteroid.cms"
Texture "asteroid.jpg"
Radius 1.5

EllipticalOrbit
{
Period 1.8809
SemiMajorAxis 1.5237 # 1.524
Eccentricity 0.039
Inclination 16.8
AscendingNode 347.4
ArgOfPericenter 48.2
MeanAnomaly 236.63
Epoch 2452613.5
}
Albedo 0.1
RotationPeriod 30.0
}

"MPO 11059" "Sol"
{
Class "asteroid"
Mesh "asteroid.cms"
Texture "asteroid.jpg"
Radius 0.5

EllipticalOrbit
{
Period 1.8809
SemiMajorAxis 1.5237 # 1.520
Eccentricity 0.034
Inclination 24.2
AscendingNode 147.4
ArgOfPericenter 14.5
MeanAnomaly 344.3
Epoch 2451953.5
}
Albedo 0.1
RotationPeriod 30.0
}

"MPO 12317" "Sol"
{
Class "asteroid"
Mesh "asteroid.cms"
Texture "asteroid.jpg"
Radius 0.225

EllipticalOrbit
{
Period 1.8809
SemiMajorAxis 1.5237 # 1.518
Eccentricity 0.131
Inclination 19.2
AscendingNode 165.5
ArgOfPericenter 48.1
MeanAnomaly 319.7
Epoch 2451993.5
}
Albedo 0.1
RotationPeriod 30.0
}

"MPO 13842" "Sol"
{
Class "asteroid"
Mesh "asteroid.cms"
Texture "asteroid.jpg"
Radius 0.68

EllipticalOrbit
{
Period 1.8809
SemiMajorAxis 1.5237 # 1.523
Eccentricity 0.111
Inclination 28.5
AscendingNode 191.0
ArgOfPericenter 277.4
MeanAnomaly 72.3
Epoch 2452013.5
}
Albedo 0.1
RotationPeriod 30.0
}

# A minor effort, but mine own

I realized afterward that I'd used the wrong field as the names. An updated version, including some annotations, is available at http://www.lns.cornell.edu/~seb/celestia/MartianTrojans.ssc

Thank you Selden
works a treat