The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 02GX31
# Created Wed Dec 25 02:08:16 2024
# Orbit generated from Bernstein formalism
# Fitting 5 observations of 5
# Arc: 4.41d
# First observation: 2002/04/06
# Last observation: 2002/04/10
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# Chi-squared of fit: 8.35 DOF: 6 RMS: 0.23
# Min/Max residuals: -0.36 0.30
# Exact a, adot, b, bdot, g, gdot:
1.733214E-05 2.669187E-02 1.222217E-06 -8.687103E-04 2.554866E-02 0.000000E+00
# Covariance matrix:
2.9344E-11 4.7034E-08 -1.9621E-13 -3.0100E-10 7.9419E-09 0.0000E+00
4.7034E-08 7.6946E-05 -3.2062E-10 -4.9184E-07 1.2977E-05 0.0000E+00
-1.9621E-13 -3.2062E-10 5.3198E-13 -4.6805E-11 -5.4081E-11 0.0000E+00
-3.0100E-10 -4.9184E-07 -4.6805E-11 1.3215E-08 -8.2964E-08 0.0000E+00
7.9419E-09 1.2977E-05 -5.4081E-11 -8.2964E-08 2.1890E-06 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.1945E-04
# lat0 lon0 xBary yBary zBary JD0
1.147319 -143.293006 0.346784 0.018795 -0.940932 2452370.699723
# Heliocentric elements and errors
Epoch: 2452370.5000 = 2002/04/06
Mean Anomaly: 357.08946 +/- 265.510
Argument of Peri: 152.48803 +/- 331.434
Long of Asc Node: 67.32379 +/- 7.311
Inclination: 2.16742 +/- 0.462
Eccentricity: 0.10647776 +/- 0.5366
Semi-Major Axis: 44.84708041 +/- 24.3952
Time of Perihelion: 2453257.3921 +/- 80902.2
Perihelion: 40.07186382 +/- 32.4687
Aphelion: 49.62229700 +/- 36.1619
Period (y) 300.3374 +/- 245.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -32.33378811 +/- 1.8169
Ecliptic Y -23.67032206 +/- 1.3544
Ecliptic Z 0.78376183 +/- 0.0454
Ecliptic XDOT 0.00169984 +/- 0.0014
Ecliptic YDOT -0.00229563 +/- 0.0011
Ecliptic ZDOT -0.00009286 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.07957438 +/- 1.6698
Geocenter to KBO 39.14099227 +/- 2.2667
# Hcoef: 7.03
The following table shows the complete astrometric record for 02GX31. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (02GX31) followed by the observatory code and reference code for the source of the astrometry.
2002 04 06.19898 14 19 02.38 -12 40 13.4 22.7R 02GX31 807 Cf5154 2002 04 06.33780 14 19 01.77 -12 40 09.8 02GX31 807 Cf5154 2002 04 07.31310 14 18 57.41 -12 39 47.4 02GX31 807 Cf5154 2002 04 10.52033 14 18 42.75 -12 38 33.7 22.7R 02GX31 568 Cf5154 2002 04 10.60891 14 18 42.34 -12 38 31.0 02GX31 568 Cf5154
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 -0.17 0.00 -0.36
2 0.0004 -9.61 -0.01 0.48 0.15
3 0.0031 -77.24 0.23 0.79 0.30
4 0.0118 -304.10 0.03 0.27 -0.35
5 0.0121 -310.66 -0.09 0.86 0.26
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.
02GX31 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 libcent 0 -180.0 -180.0 -180.0 libamp 0 -180.0 -180.0 -180.0 libcent 1 -180.0 -180.0 -180.0 libamp 1 -180.0 -180.0 -180.0 libcent 2 -180.0 -180.0 -180.0 libamp 2 -180.0 -180.0 -180.0 libcent 3 -180.0 -180.0 -180.0 libamp 3 -180.0 -180.0 -180.0 libcent 4 -180.0 -180.0 -180.0 libamp 4 -180.0 -180.0 -180.0 kozaimean 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0