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Forum » SpaceEngine » Mods and Addons » Orbital elements for C/2014 Q2 (Lovejoy) comet
Orbital elements for C/2014 Q2 (Lovejoy) comet
codrinbDate: Sunday, 08.02.2015, 22:07 | Message # 1
Observer
Group: Newbies
Pirate
Messages: 7
Status: Offline
Hi all,

This is my first attempt to define orbital elements for a body in Space Engine.
So please bare with me on the correctness of the definition

So I've done it for C/2014 Q2 (Lovejoy) comet

Can anyone help me create a green glow out of the GasColor and DustColor.
Don't know exactly how those numbers work.

Thanks!
-Codrin

Code

// This file contains the orbital elements for the "C/2014 Q2 (Lovejoy)" comet
// The information was obtained from:
//  
// https://en.wikipedia.org/wiki/C/2014_Q2_%28Lovejoy%29 - WP
// http://www.minorplanetcenter.net/mpec/K14/K14Q10.html - MP
// http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=c&o=CK14Q020 - HV
// http://ssd.jpl.nasa.gov/sbdb.cgi?ID=dK14Q020 - NS
// http://theskylive.com/c2014q2-info - SL

Comet "C2014 Q2 (Lovejoy)"
{
  ParentBody  "Sol"
  CometType   "C" //?
  AbsMagn     9.4 // NS, also in MPC database?
  SlopeParam  12 // NS - comet total magnitude slope??
  Radius      //
  Mass        //
  Obliquity       //
  EqAscendNode    //
  RotationPeriod //
   

  Orbit
  {
   Epoch           2457000.5 // HV
   Period          11000 // WP
   MeanMotion    7.034183924934905 // NS, degrees/day
   PericenterDist  //
   SemiMajorAxis   581.2017359072839  // NS
   Eccentricity    0.99811 // WP
   Inclination     79.60067 // MP
   AscendingNode   94.97547266770687 // NS, 94.9937 at HV
   ArgOfPericenter 12.39522949341186  // NS
   MeanAnomaly     359.9969704001868 // NS
  }

  CometTail
  {
    
   MaxLength  //
   Bright  1.0 //
   GasToDust   0.2 // ? "PANSTARRS/C2011 L4 (PANSTARRS)"
   Particles   2000 // ? "PANSTARRS/C2011 L4 (PANSTARRS)"
   GasColor   (0.003 0.009 0.015) // ? halley
   DustColor  (0.050 0.050 0.050) // ? halley
  }
}
 
Stargate38Date: Sunday, 08.02.2015, 22:29 | Message # 2
Astronaut
Group: Users
United States
Messages: 58
Status: Offline
The first number is red, the second green, and the third blue. "1 1 1" is white, "0 1 1" is cyan, "1 0 1" is magenta, and "1 1 0" is yellow, so the 2 values should be between "0 0 0" and "0 0 1". I hope I got that right, because that's how colors work on most programs, including Celestia.
 
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