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: 15JG13 # Created Wed May 21 01:10:30 2025 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 61.91d # First observation: 2015/03/22 # Last observation: 2015/05/23 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.024420 0.000000 -0.003793 0.023788 0.000000 # Chi-squared of fit: 4.49 DOF: 30 RMS: 0.09 # Min/Max residuals: -0.17 0.16 # Exact a, adot, b, bdot, g, gdot: 1.445037E-05 2.229594E-02 -1.967397E-06 -3.729376E-03 2.338306E-02 1.084060E-03 # Covariance matrix: 2.5630E-13 7.0677E-11 -9.6980E-15 -1.8989E-12 1.1920E-11 -4.9982E-11 7.0677E-11 1.0861E-07 -1.4606E-11 -2.8047E-09 1.7613E-08 -1.9324E-07 -9.6980E-15 -1.4606E-11 2.0907E-13 -9.2296E-13 -2.3718E-12 2.5108E-11 -1.8989E-12 -2.8047E-09 -9.2296E-13 8.6961E-11 -4.6151E-10 2.8973E-09 1.1920E-11 1.7613E-08 -2.3718E-12 -4.6151E-10 2.8975E-09 -1.8401E-08 -4.9982E-11 -1.9324E-07 2.5108E-11 2.8973E-09 -1.8401E-08 4.4507E-06 # lat0 lon0 xBary yBary zBary JD0 12.907437 -143.818539 0.566434 0.182379 -0.795316 2457104.051198 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 44.07789 +/- 65.148 Argument of Peri: 77.32388 +/- 75.655 Long of Asc Node: 88.57680 +/- 0.332 Inclination: 15.68496 +/- 0.066 Eccentricity: 0.05250051 +/- 0.0705 Semi-Major Axis: 45.20858372 +/- 0.9244 Time of Perihelion: 2443506.4755 +/- 20088.0 Perihelion: 42.83511012 +/- 3.3050 Aphelion: 47.58205732 +/- 3.3320 Period (y) 303.9762 +/- 9.32 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.64221646 +/- 0.0775 Ecliptic Y -24.63335153 +/- 0.0566 Ecliptic Z 9.55287443 +/- 0.0220 Ecliptic XDOT 0.00135916 +/- 0.0002 Ecliptic YDOT -0.00224354 +/- 0.0001 Ecliptic ZDOT -0.00039719 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 43.56767815 +/- 0.0696 Geocenter to KBO 42.76601082 +/- 0.0984 # Hcoef: 8.09
The following table shows the complete astrometric record for 15JG13. 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 (15JG13) followed by the observatory code and reference code for the source of the astrometry.
2015 03 22.55042 14 32 22.95 -01 22 20.1 24.4i 15JG13 T09 C~8suo 2015 03 22.56516 14 32 22.89 -01 22 19.6 24.0i 15JG13 T09 C~8suo 2015 03 22.56792 14 32 22.88 -01 22 19.4 23.9i 15JG13 T09 C~8suo 2015 03 22.58468 14 32 22.83 -01 22 18.9 24.4i 15JG13 T09 C~8suo 2015 03 22.59857 14 32 22.78 -01 22 18.6 24.0i 15JG13 T09 C~8suo 2015 03 22.61243 14 32 22.74 -01 22 18.4 24.5i 15JG13 T09 C~8suo 2015 03 22.62615 14 32 22.69 -01 22 18.1 24.6i 15JG13 T09 C~8suo 2015 05 15.412542 14 28 38.354 -01 02 33.55 24.5r 15JG13 568 C~2TuN 2015 05 15.435977 14 28 38.256 -01 02 33.28 24.3r 15JG13 568 C~2TuN 2015 05 15.466105 14 28 38.125 -01 02 32.69 24.4r 15JG13 568 C~2TuN 2015 05 17.351168 14 28 30.073 -01 02 07.38 25.1g 15JG13 568 C~2TuN 2015 05 17.369180 14 28 29.986 -01 02 07.20 25.4g 15JG13 568 C~2TuN 2015 05 17.435309 14 28 29.702 -01 02 06.40 25.4g 15JG13 568 C~2TuN 2015 05 23.40482 14 28 04.82 -01 00 56.4 24.1z 15JG13 T09 C~8suo 2015 05 23.42124 14 28 04.76 -01 00 56.1 24.1z 15JG13 T09 C~8suo 2015 05 23.43904 14 28 04.69 -01 00 56.1 24.2z 15JG13 T09 C~8suo 2015 05 23.45689 14 28 04.61 -01 00 55.9 24.0z 15JG13 T09 C~8suo 2015 05 23.45977 14 28 04.59 -01 00 55.6 23.8z 15JG13 T09 C~8suo
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 0.13 0.00 -0.11
2 0.0000 -1.01 -0.06 0.18 -0.05
3 0.0000 -1.22 -0.11 0.33 0.07
4 0.0001 -2.09 -0.04 0.56 0.16
5 0.0001 -2.90 -0.06 0.60 0.08
6 0.0002 -3.53 0.08 0.60 -0.03
7 0.0002 -4.33 0.05 0.64 -0.11
8 0.1475 -3571.19 -0.10 41.33 0.01
9 0.1475 -3572.67 -0.02 41.12 -0.02
10 0.1476 -3574.72 -0.06 41.04 0.14
11 0.1528 -3697.25 0.13 26.18 0.03
12 0.1528 -3698.54 0.02 25.93 -0.07
13 0.1530 -3702.83 0.08 25.32 -0.12
14 0.1693 -4078.83 -0.06 -28.38 -0.07
15 0.1694 -4079.78 0.01 -28.39 0.09
16 0.1694 -4080.77 0.13 -28.72 -0.06
17 0.1695 -4081.97 0.03 -28.92 -0.08
18 0.1695 -4082.36 -0.17 -28.73 0.14
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.
15JG13 quality flag:1 Type: CLASSICAL SCATNEAR SCATNEAR axisobj 44.769 49.328 42.111 ecceobj 0.044 0.278 0.054 incobj 15.686 15.608 15.902 qmin 42.239 34.872 36.025 qmax 48.144 65.221 48.944 amean 45.088 49.732 42.328 amin 44.733 49.211 41.912 amax 45.449 50.406 42.785 emean 0.048 0.282 0.080 emin 0.037 0.265 0.005 emax 0.060 0.297 0.147 imean 14.081 14.120 13.314 imin 13.735 13.328 11.653 imax 14.430 14.918 14.853 excite_mean 0.248 0.373 0.247 fracstop 1.000 1.000 1.000 cjmean 3.039 2.997 3.009 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 178.4 169.1 194.7 kozaiamp 180.0 179.9 179.9