# This file contains the orbital elements for 6 Martian Trojan asteroids
#
# The information was obtained from the IAU's Minor Planet Center
# at http://cfa-www.harvard.edu/iau/mpc.html
# on their page
# http://cfa-www.harvard.edu/iau/lists/MarsTrojans.html
# and translated into Celestia's format
# by Selden Ball seb+cel@lns.cornell.edu midSept., 2002.
#
# Comment: If the semi-major axis and period of the trojans' orbits are not identical
#          to those of Mars, then they'll drift out of sync with no gravity to pull them back.
#          I've arbitrarily set their periods and values of "a" to be the same as those of Mars
#          so Celestia should keep drawing them in appaopriate places.
#
# P = Period in years == a^3/2 = "a to the three halves" = sqrt(a**3) (only true for solar orbits)
# i = Inclination of the orbit with respect to the J2000 ecliptic plane. (Deg)
#
# Ln = lagrange point: L4 = leading; L5 = trailing
# q = Perihelion distance (AU)
# Q = Aphelion distance (AU)
# H = absolute visual magnitude --> diameter: 3.0=670-1500km; 16=2-4
# Epoch = date of observation (yyyymmdd) --> Julian date
# M = mean anomaly (Deg)
# Peri. = w = Arg of Perihelion  wrt J2000.0 ecliptic (deg)
# Node = long. of ascending node wrt J2000.0 ecliptic (deg)
# Incl. = orbital inclination wrt J2000.0 ecliptic (deg) 
# e = orbital eccentricity = eccentric anomaly
# a = semimajor axis (AU) 
# z = reciprocal sma (1/AU)
# Opps. = # of oppositions of observations
#
#
#Designation (and name)     Prov. Des.  Ln      q       Q      H     Epoch      M     Peri.  
# (5261) Eureka             1990 MB     L5    1.425   1.622  16.1   20021122  149.52   95.4
# Node    Incl.   e      a      Opps.     Ref 
# 245.1   20.3  0.065   1.524     6     MPC 30250


"Eureka" "Sol"
{
	Class "asteroid"
	Mesh "asteroid.cms"
        Texture "asteroid.jpg"
	Radius 2.0

	EllipticalOrbit
	{
		Period          1.8809 
		SemiMajorAxis   1.5237 #1.524
		Eccentricity    0.065
		Inclination     20.3
		AscendingNode   245.1
		ArgOfPericenter 95.4
                MeanAnomaly     149.52
		Epoch           2452613.5
	}
        Albedo              0.1
	RotationPeriod    30.0
}

#Prov. Des.  Ln      q       Q      H     Epoch      M     Peri.  Node    Incl.   e      a      Opps.     Ref.
#1998 VF31   L5    1.371   1.677  17.4   20021122  307.35  310.4  221.4   31.3  0.100   1.524     3     MPO 10873

"1998 VF31" "Sol"
{
	Class "asteroid"
	Mesh "asteroid.cms"
        Texture "asteroid.jpg"
	Radius 1.5

	EllipticalOrbit
	{
		Period          1.8809 
		SemiMajorAxis   1.5237 #1.524
		Eccentricity    0.1
		Inclination     31.3
		AscendingNode   221.4
		ArgOfPericenter 310.4
                MeanAnomaly     307.35
		Epoch           2452613.5
	}
        Albedo              0.1
	RotationPeriod    30.0
}

#Prov. Des.  Ln      q       Q      H     Epoch      M     Peri.  Node    Incl.   e      a      Opps.     Ref.
#1999 UJ7    L4    1.465   1.584  17.0   20021122  236.63   48.2  347.4   16.8  0.039   1.524     2     MPO 27649

"1999 UJ7" "Sol"
{
	Class "asteroid"
	Mesh "asteroid.cms"
        Texture "asteroid.jpg"
	Radius 1.5

	EllipticalOrbit
	{
		Period          1.8809 
		SemiMajorAxis   1.5237 # 1.524
		Eccentricity    0.039
		Inclination      16.8
		AscendingNode   347.4
		ArgOfPericenter  48.2
                MeanAnomaly     236.63
		Epoch           2452613.5
	}
        Albedo              0.1
	RotationPeriod    30.0
}


#Prov. Des.  Ln      q       Q      H     Epoch      M     Peri.  Node    Incl.   e      a      Opps.     Ref.
#2001 DH47   L5    1.468   1.572  19.7   20010131  344.3    14.5  147.4   24.2  0.034   1.520  ( 20d)   MPO 11059

"2001 DH47" "Sol"
{
	Class "asteroid"
	Mesh "asteroid.cms"
        Texture "asteroid.jpg"
	Radius 0.5

	EllipticalOrbit
	{
		Period          1.8809 
		SemiMajorAxis   1.5237 # 1.520
		Eccentricity    0.034
		Inclination      24.2
		AscendingNode   147.4
		ArgOfPericenter  14.5
                MeanAnomaly     344.3
		Epoch           2451953.5
	}
        Albedo              0.1
	RotationPeriod    30.0
}


#Prov. Des.  Ln      q       Q      H     Epoch      M     Peri.  Node    Incl.   e      a      Opps.     Ref.
#2001 FG24   L5    1.319   1.717  21.3   20010312  319.7    48.1  165.5   19.2  0.131   1.518  (  6d)   MPO 12317

"2001 FG24" "Sol"
{
	Class "asteroid"
	Mesh "asteroid.cms"
        Texture "asteroid.jpg"
	Radius 0.225

	EllipticalOrbit
	{
		Period          1.8809 
		SemiMajorAxis   1.5237 # 1.518
		Eccentricity    0.131
		Inclination      19.2
		AscendingNode   165.5
		ArgOfPericenter  48.1
                MeanAnomaly     319.7
		Epoch           2451993.5
	}
        Albedo              0.1
	RotationPeriod    30.0
}

#Prov. Des.  Ln      q       Q      H     Epoch      M     Peri.  Node    Incl.   e      a      Opps.     Ref.
#2001 FR127  L5    1.354   1.692  19.0   20010401   72.3   277.4  191.0   28.5  0.111   1.523  ( 18d)   MPO 13842

"2001 FR127" "Sol"
{
	Class "asteroid"
	Mesh "asteroid.cms"
        Texture "asteroid.jpg"
	Radius 0.68

	EllipticalOrbit
	{
		Period          1.8809 
		SemiMajorAxis   1.5237 # 1.523
		Eccentricity    0.111
		Inclination      28.5
		AscendingNode   191.0
		ArgOfPericenter 277.4
                MeanAnomaly      72.3
		Epoch           2452013.5
	}
        Albedo              0.1
	RotationPeriod    30.0
}