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: 13JC66 # Created Sun Oct 19 01:09:45 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 1.07d # First observation: 2013/05/11 # Last observation: 2013/05/12 # WARNING Fitting with energy constraint # WARNING and with gdot fixed = 0 # Chi-squared of fit: 4.17 DOF: 12 RMS: 0.13 # Min/Max residuals: -0.22 0.18 # Exact a, adot, b, bdot, g, gdot: 1.724535E-05 2.742640E-02 -1.993149E-06 -2.902642E-03 2.683962E-02 0.000000E+00 # Covariance matrix: 3.7909E-11 6.3416E-08 -3.5678E-12 -6.1699E-09 1.0685E-08 0.0000E+00 6.3416E-08 1.0722E-04 -6.0185E-09 -1.0408E-05 1.8024E-05 0.0000E+00 -3.5678E-12 -6.0185E-09 6.0110E-13 4.9620E-10 -1.0126E-09 0.0000E+00 -6.1699E-09 -1.0408E-05 4.9620E-10 1.1100E-06 -1.7512E-06 0.0000E+00 1.0685E-08 1.8024E-05 -1.0126E-09 -1.7512E-06 3.0327E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.5442E-04 # lat0 lon0 xBary yBary zBary JD0 -18.539107 -146.914145 -0.300836 -0.307257 -0.916397 2456423.518658 # Heliocentric elements and errors Epoch: 2456420.5000 = 2013/05/08 Mean Anomaly: 24.81804 +/- 141.762 Argument of Peri: 226.77963 +/- 211.089 Long of Asc Node: 321.87749 +/- 2.158 Inclination: 18.97582 +/- 0.230 Eccentricity: 0.02041131 +/- 0.5745 Semi-Major Axis: 38.89296877 +/- 20.2295 Time of Perihelion: 2450312.9066 +/- 389234.2 Perihelion: 38.09911240 +/- 29.8667 Aphelion: 39.68682515 +/- 30.4209 Period (y) 242.5576 +/- 189.24 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -30.24183242 +/- 1.9205 Ecliptic Y -20.06135128 +/- 1.2510 Ecliptic Z -11.84642899 +/- 0.7686 Ecliptic XDOT 0.00159980 +/- 0.0014 Ecliptic YDOT -0.00229266 +/- 0.0011 Ecliptic ZDOT -0.00028058 +/- 0.0005 # Distances at JD0 (AU) Heliocenter to KBO 38.17543874 +/- 1.6744 Geocenter to KBO 37.25834569 +/- 2.4175 # Hcoef: 8.00
The following table shows the complete astrometric record for 13JC66. 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 (13JC66) followed by the observatory code and reference code for the source of the astrometry.
2013 05 11.01788 13 34 43.33 -29 50 26.8 13JC66 W84 C~2TH3 2013 05 11.05256 13 34 43.17 -29 50 26.0 13JC66 W84 C~2TH3 2013 05 11.08724 13 34 42.99 -29 50 24.5 13JC66 W84 C~2TH3 2013 05 11.09593 13 34 42.94 -29 50 24.1 13JC66 W84 C~2TH3 2013 05 12.01178 13 34 38.28 -29 49 51.9 24.4g 13JC66 W84 C~2TH3 2013 05 12.04650 13 34 38.11 -29 49 50.9 24.1g 13JC66 W84 C~2TH3 2013 05 12.08120 13 34 37.92 -29 49 49.3 23.5i 13JC66 W84 C~2TH3 2013 05 12.08987 13 34 37.88 -29 49 49.0 23.6i 13JC66 W84 C~2TH3
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 -0.22 0.00 0.06
2 0.0001 -2.23 0.18 -0.06 -0.22
3 0.0002 -4.97 0.07 0.42 0.05
4 0.0002 -5.72 -0.02 0.54 0.12
5 0.0027 -74.08 -0.02 6.97 -0.04
6 0.0028 -76.50 0.17 7.04 -0.19
7 0.0029 -79.40 -0.11 7.57 0.10
8 0.0029 -80.00 -0.05 7.64 0.12
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.
13JC66 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