See also:
Most of the corrections detailed for version 1.2.5 are therefore not required and potentially in error when applied to 1.3.0. Below are some additions specific to 1.3.0 - do not use them with earlier versions.
Archive: saturnmoons-130.zip Length Date Time Name -------- ---- ---- ---- 125599 02-04-03 02:42 models/epimetheus.3ds 125599 02-04-03 02:34 models/janus.3ds 125599 02-03-03 19:53 models/prometheus.3ds 0 04-15-03 19:12 models/ 0 04-15-03 19:22 textures/lores/ 3216 04-15-03 19:22 textures/lores/epimetheus.jpg 3985 04-15-03 19:22 textures/lores/janus.jpg 3271 04-15-03 19:22 textures/lores/prometheus.jpg 0 04-15-03 19:20 textures/medres/ 13676 04-15-03 19:20 textures/medres/epimetheus.jpg 16569 04-15-03 19:18 textures/medres/janus.jpg 12876 04-15-03 19:19 textures/medres/prometheus.jpg 0 04-15-03 19:20 textures/ 2630 04-15-03 20:11 SaturnMoons-readme.txt -------- ------- 433020 14 files
\extras
directory.
It provides shape models and textures for three inner moons of Saturn,
adapted from public domain data and images provided by Phil Stooke
at his Cartography of Non-spherical Worlds website
http://publish.uwo.ca/~pjstooke/plancart.htm
and his Small World Atlas website
http://www.ssc.uwo.ca/geography/spacemap/contents.htm
I generated the 3ds mesh objects and modified and applied the texture
maps. Smoothing of the resulting objects was done by "Praesepe".
All of these satellites depart markedly from simple elliptical orbits -
Janus and Epimetheus interact strongly with each other during close
approaches, as do Prometheus and the satellite Pandora. The orbits
provided in Celestia's minormoons.ssc
are correct for January 2000, but
will be significantly in error at other dates. However, all these moons
are in synchronous rotation with their orbital periods, so it adds
realism if the shape models are rotated to align their prime meridians
with Saturn.
To display them optimally in Celestia you should edit the texture and
mesh definitions, and also add the necessary RotationOffsets to
minormoons.ssc
, as noted in CAPITAL LETTERS in the text that follows:
However, if you have not previously edited minormoons.ssc
, and therefore
have no changes you wish to preserve, you may prefer to simply copy the
following version on top of the original file in the \extras
folder - this
will automatically make all necessary changes.
"Prometheus" "Sol/Saturn" { Texture "prometheus.jpg" # CHANGE THIS LINE Mesh "prometheus.3ds" # CHANGE THIS LINE Radius 50.1 EllipticalOrbit { Period 0.612986 SemiMajorAxis 139350 Eccentricity 0.0023 Inclination 0.000 LongOfPericenter 32.879 # J2000.0 MeanAnomaly 22.695 # } RotationOffset 55.6 # ADD THIS LINE Albedo 0.6 } # ...Pandora is here in original file "Epimetheus" "Sol/Saturn" { Texture "epimetheus.jpg" # CHANGE THIS LINE Mesh "epimetheus.3ds" # CHANGE THIS LINE Radius 59.5 EllipticalOrbit { Period 0.694590 SemiMajorAxis 151422 Eccentricity 0.0205 Inclination 0.337 # AscendingNode 149.880 # ArgOfPericenter 86.905 # J2000.0 MeanAnomaly 192.354 # } RotationOffset 69.1 # ADD THIS LINE Albedo 0.5 } "Janus" "Sol/Saturn" { Texture "janus.jpg" # CHANGE THIS LINE Mesh "janus.3ds" # CHANGE THIS LINE Radius 88.8 EllipticalOrbit { Period 0.694590 SemiMajorAxis 151472 Eccentricity 0.0073 Inclination 0.168 # AscendingNode 120.557 # ArgOfPericenter 43.066 # J2000.0 MeanAnomaly 79.973 # } RotationOffset 243.6 # ADD THIS LINE Albedo 0.6 }
This Web page is maintained by Selden Ball
at Wilson Lab.
Please send any comments or corrections to
seb@lepp.cornell.edu