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