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: 23GJ12 # Created Mon Jul 7 01:12:06 2025 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 96.81d # First observation: 2023/02/17 # Last observation: 2023/05/25 Preliminary a, adot, b, bdot, g, gdot: -0.000030 0.036921 0.000029 0.002388 0.026369 0.000000 # Chi-squared of fit: 18.54 DOF: 30 RMS: 0.18 # Min/Max residuals: -0.57 0.30 # Exact a, adot, b, bdot, g, gdot: 2.103535E-05 3.363439E-02 1.875422E-06 2.738839E-03 2.589426E-02 2.713945E-03 # Covariance matrix: 2.3724E-13 -1.9824E-12 -6.2525E-15 2.0950E-13 2.8460E-13 1.0010E-10 -1.9824E-12 6.7673E-10 5.4986E-12 -6.1520E-11 9.2827E-11 -5.5676E-09 -6.2525E-15 5.4986E-12 2.2566E-13 -1.5238E-12 7.7894E-13 -4.3152E-11 2.0950E-13 -6.1520E-11 -1.5238E-12 1.6490E-11 -7.6644E-12 7.1376E-10 2.8460E-13 9.2827E-11 7.7894E-13 -7.6644E-12 1.6087E-11 -8.2730E-11 1.0010E-10 -5.5676E-09 -4.3152E-11 7.1376E-10 -8.2730E-11 1.9890E-07 # lat0 lon0 xBary yBary zBary JD0 -28.471581 179.420190 0.514012 -0.406610 -0.749402 2459992.815451 # Heliocentric elements and errors Epoch: 2459990.5000 = 2023/02/15 Mean Anomaly: 1.22220 +/- 0.229 Argument of Peri: 268.36235 +/- 1.824 Long of Asc Node: 259.58526 +/- 0.019 Inclination: 28.17725 +/- 0.001 Eccentricity: 0.69808739 +/- 0.0034 Semi-Major Axis: 129.64051277 +/- 1.2052 Time of Perihelion: 2458160.0900 +/- 342.7 Perihelion: 39.14010504 +/- 0.5723 Aphelion: 220.14092050 +/- 2.0936 Period (y) 1476.1120 +/- 20.58 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.78449114 +/- 0.0053 Ecliptic Y 0.86566159 +/- 0.0001 Ecliptic Z -18.41034104 +/- 0.0029 Ecliptic XDOT -0.00042780 +/- 0.0000 Ecliptic YDOT -0.00354325 +/- 0.0000 Ecliptic ZDOT 0.00011773 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.36560493 +/- 0.0048 Geocenter to KBO 38.61860080 +/- 0.0060 # Hcoef: 7.49
The following table shows the complete astrometric record for 23GJ12. 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 (23GJ12) followed by the observatory code and reference code for the source of the astrometry.
2023 02 17.31465 11 09 16.50 -25 42 42.83 23GJ12 W84 C~8vOJ 2023 02 17.32682 11 09 16.45 -25 42 42.80 23GJ12 W84 C~8vOJ 2023 02 17.33897 11 09 16.38 -25 42 42.67 23GJ12 W84 C~8vOJ 2023 02 23.18637 11 08 48.39 -25 41 46.59 23GJ12 W84 C~8vOJ 2023 02 23.19341 11 08 48.37 -25 41 46.59 23GJ12 W84 C~8vOJ 2023 02 23.20045 11 08 48.34 -25 41 46.59 23GJ12 W84 C~8vOJ 2023 03 01.23653 11 08 18.53 -25 40 14.69 23GJ12 W84 C~8vOJ 2023 03 01.24867 11 08 18.47 -25 40 14.53 23GJ12 W84 C~8vOJ 2023 03 01.26078 11 08 18.42 -25 40 14.27 23GJ12 W84 C~8vOJ 2023 04 12.14891 11 05 03.59 -25 16 47.42 23.4r 23GJ12 W84 C~8vOJ 2023 04 12.16103 11 05 03.56 -25 16 46.58 23GJ12 W84 C~8vOJ 2023 04 12.17316 11 05 03.52 -25 16 46.05 23GJ12 W84 C~8vOJ 2023 04 15.20877 11 04 52.35 -25 14 27.71 23GJ12 W84 C~8vOJ 2023 04 15.22092 11 04 52.32 -25 14 27.02 23GJ12 W84 C~8vOJ 2023 04 18.20310 11 04 41.96 -25 12 07.70 23GJ12 W84 C~8vOJ 2023 04 18.21521 11 04 41.92 -25 12 07.30 23GJ12 W84 C~8vOJ 2023 05 25.11193 11 03 37.54 -24 43 00.91 23GJ12 W84 C~8vOJ 2023 05 25.12406 11 03 37.54 -24 43 00.48 23GJ12 W84 C~8vOJ
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 -0.10 0.00 -0.04
2 0.0000 -0.62 0.02 -0.27 -0.04
3 0.0001 -1.53 -0.14 -0.57 -0.07
4 0.0161 -365.68 -0.08 -117.42 0.07
5 0.0161 -365.92 0.14 -117.54 0.08
6 0.0161 -366.28 0.23 -117.72 0.04
7 0.0326 -768.30 -0.09 -213.71 -0.03
8 0.0327 -769.10 -0.05 -213.93 -0.08
9 0.0327 -769.82 0.07 -213.99 0.03
10 0.1474 -3759.03 0.13 -130.98 -0.11
11 0.1474 -3759.78 0.20 -130.41 0.25
12 0.1475 -3760.50 0.30 -130.18 0.27
13 0.1558 -3958.06 0.11 -74.54 -0.24
14 0.1558 -3958.73 0.22 -74.10 -0.05
15 0.1640 -4146.98 -0.57 -12.73 0.05
16 0.1640 -4147.64 -0.48 -12.62 -0.09
17 0.2650 -5716.34 0.02 1153.36 0.03
18 0.2650 -5716.53 0.08 1153.75 -0.06
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.
23GJ12 quality flag:1 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 131.737 143.430 123.327 ecceobj 0.702 0.730 0.680 incobj 28.141 28.140 28.142 qmin 37.930 37.366 38.261 qmax 236.092 261.616 217.202 amean 132.687 144.292 124.148 amin 129.772 140.626 121.506 amax 137.637 150.230 128.343 emean 0.700 0.728 0.677 emin 0.685 0.714 0.662 emax 0.715 0.742 0.692 imean 30.245 30.034 30.216 imin 29.400 29.362 29.420 imax 31.537 31.338 31.362 excite_mean 0.862 0.884 0.843 fracstop 1.000 1.000 1.000 cjmean 2.818 2.806 2.826 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 306.8 299.1 312.2 kozaiamp 38.5 36.0 40.7