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Old 03-03-2009, 10:52 PM
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ian musgrave
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Join Date: Jan 2007
Location: Adelaide
Posts: 37
Stellarium File for 2009 DD45 (and Celestia)

Quote:
Originally Posted by rally View Post
Thanks for the heads up

I have tried to load the ephemeris of 2009DD45 into Stellarium 10.1 but seem to be having problems !
Okay, this is a bit late, but I worked it out.
1) Don't use the JPL orbital data, use the MPC data
http://www.cfa.harvard.edu/iau/Ephem...l/K09D45D.html
2) This format works in Stellarium 0.9, I'm not sure if it works in Stellarium1.0, but it works just fine in 0.9
[DD45]
name = 2009 DD45
parent = Sun
radius = 0.03
oblateness = 0.0
albedo = 0.423
lighting = true
sidereal_period =
halo = true
color = 1.0,1.0,1.0
tex_halo = star16x16.png
tex_map = nomap.png
coord_func = comet_orbit
orbit_Epoch = 2454880.5
orbit_MeanAnomaly = 349.78408
orbit_SemiMajorAxis = 1.3494665
orbit_Eccentricity = 0.2656185
orbit_ArgOfPericenter = 4.09212
orbit_AscendingNode = 162.04614
orbit_Inclination = 13.22360

For good measure, here's the Celestia .ssc file

======= 8< cut here DD45.ssc 8< ==========================
"2009 DD45" "Sol"
{
Class "asteroid"
Mesh "ky26.cmod"
Texture "asteroid.jpg"
Radius 0.015 # maximum semi-axis about 20-30 meters
MeshCenter [ -0.000718 -0.000099 0.000556 ]

InfoURL "http://www.cfa.harvard.edu/iau/Ephemerides/Unusual/K09D45D.html"

EllipticalOrbit
{
Epoch 2454880.5 # 2009 Feb. 18.0 00:00UT
Period 1.57
SemiMajorAxis 1.3494665
Eccentricity 0.2656185
Inclination 13.22360
AscendingNode 162.04614
ArgOfPericenter 4.09212
MeanAnomaly 349.78408
}

RotationPeriod 0.178

Albedo 0.15

}
=========== 8 < cut here 8< =============================

Cheers! Ian
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