# 87 Sylvia, using Ida as template. # additional Sylvia info http://en.wikipedia.org/wiki/87_Sylvia # http://www.johnstonsarchive.net/astro/astmoons/am-00087.html "Sylvia" "Sol" { Class "asteroid" Mesh "ida.cmod" #Texture "asteroid.jpg" Texture "idamosaic.*" # Phil Stooke Radius 143 EllipticalOrbit { Epoch 2453249.5 # 2005 Aug Period 6.5207 # mean SemiMajorAxis 3.49026 # at epoch Eccentricity 0.079662 # at epoch Inclination 10.8561 # at epoch AscendingNode 73.3302 # at epoch ArgOfPericenter 266.048 # at epoch MeanAnomaly 352.763 # at epoch } Orientation [ 180 1 0 0 ] # retrograde rotation RotationPeriod 5.18365 Obliquity 156.96 # pinched from Ida EquatorAscendingNode 352.77 RotationOffset 179.46 Albedo 0.0435 } "Romulus" "Sol/Sylvia" { # Data for Romulus taken from: # Marchis, F.et al'; 2005, Nature, 436:822-824, # Discovery of the triple asteroidal system 87 Sylvia. InfoURL "http://www.nature.com/nature/journal/v436/n7052/fig_tab/nature04018_T1.html" Class "asteroid" Texture "asteroid.jpg" Mesh "roughsphere.cms" Radius 9.0 EllipticalOrbit { Epoch 2453249.5 # 2001 Period 3.6496 # SemiMajorAxis 1356.0 # Eccentricity 0.001 # LongOfPericenter 14.0 # AscendingNode 101 # # Inclination 1.7 # } RotationOffset 123 # place prime meridian facing Ida Albedo 0.2 } "Remus" "Sol/Sylvia" { # Data for Remus taken from: # Marchis, F.et al'; 2005, Nature, 436:822-824, # Discovery of the triple asteroidal system 87 Sylvia. InfoURL "http://www.nature.com/nature/journal/v436/n7052/fig_tab/nature04018_T1.html" Class "asteroid" Texture "asteroid.jpg" Mesh "roughsphere.cms" Radius 3.5 EllipticalOrbit { Epoch 2453246.5 # 2004 Period 1.3788 # SemiMajorAxis 706 # Eccentricity 0.016 # LongOfPericenter 51 # AscendingNode 97 # # Inclination 2.0 # } RotationOffset 123 # place prime meridian facing Sylvia Albedo 0.2 }