- # Comets
- "Halley:1P Halley" "Sol"
- {
- Class "comet"
- Mesh "halley.cmod"
- Texture "asteroid.jpg"
- Radius 7.6 # maximum semi-axis
- MeshCenter [ -0.338 1.303 0.230 ]
- EllipticalOrbit
- {
- Epoch 2449400.5 #1994 Feb 17 00:00UT
- Period 75.31589
- SemiMajorAxis 17.834144
- Eccentricity 0.967143
- Inclination 162.262690
- AscendingNode 58.420081
- ArgOfPericenter 111.332485
- MeanAnomaly 38.384264
- }
- # chaotic rotation, imperfectly defined:
- # this version from "The New Solar System", 4th Edition; Eds.
- # JK Beatty, CC Petersen, A Chaikin
- PrecessingRotation
- {
- Period 170 # 7.1 day axial rotation period
- Inclination 66
- PrecessionPeriod 0.010 # 3.7 day precession period
- }
- Albedo 0.04
- }
- "Borrelly:19P Borrelly" "Sol"
- {
- Class "comet"
- Mesh "borrelly.cms"
- Texture "asteroid.jpg"
- Radius 2.2
- InfoURL "http://www.solarviews.com/eng/borrelly.htm"
- EllipticalOrbit
- {
- Epoch 2452174.5 # 2001 Sep 22 00:00UT
- Period 6.86302
- SemiMajorAxis 3.611363
- Eccentricity 0.623908
- Inclination 30.324612
- AscendingNode 75.424869
- ArgOfPericenter 353.375385
- MeanAnomaly 358.956091
- }
- UniformRotation
- {
- Period 25
- Inclination 90
- AscendingNode 315
- }
- Albedo 0.04
- }
- "Ikeya-Zhang:153P Ikeya-Zhang" "Sol"
- {
- Class "comet"
- Texture "asteroid.jpg"
- Mesh "roughsphere.cms"
- EllipticalOrbit
- {
- Epoch 2452352.47847 # 2002 Mar 18 23:29UT
- Period 367.181906
- SemiMajorAxis 51.276792
- Eccentricity 0.990111
- Inclination 28.1206
- AscendingNode 93.3718
- ArgOfPericenter 34.6666
- MeanAnomaly 0
- }
- # These are all made up (copied from Halley)
- Radius 7.5
- UniformRotation
- {
- Period 170
- }
- Albedo 0.04
- }
- "Hale-Bopp:C1995 O1 Hale-Bopp" "Sol"
- {
- Class "comet"
- Mesh "asteroid.cms"
- Texture "asteroid.jpg"
- Radius 13
- EllipticalOrbit
- {
- Period 2523.4
- PericenterDistance 0.914142
- Eccentricity 0.995068
- Inclination 89.4300
- AscendingNode 282.4707
- ArgOfPericenter 130.5887
- MeanAnomaly -0.007
- Epoch 2450520.5
- }
- # Estimate of rotation period from here: http://www.usafa.af.mil/dfp/research/astro/papers/icqpaper.htm
- RotationPeriod 11.47
- Albedo 0.1
- }