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: 13GH137
# Created Mon Jul 7 01:09:28 2025
# Orbit generated from Bernstein formalism
# Fitting 42 observations of 42
# Arc: 3.25y
# First observation: 2013/02/08
# Last observation: 2016/05/11
Preliminary a, adot, b, bdot, g, gdot:
-0.000245 0.039516 0.000018 -0.009499 0.032653 0.000000
# Chi-squared of fit: 14.81 DOF: 78 RMS: 0.10
# Min/Max residuals: -0.23 0.31
# Exact a, adot, b, bdot, g, gdot:
1.876562E-05 3.891785E-02 -4.383320E-06 -9.352878E-03 3.244007E-02 4.636848E-03
# Covariance matrix:
1.2597E-13 -8.7793E-14 -6.5671E-15 1.7391E-14 3.7520E-14 -6.6739E-13
-8.7793E-14 2.7813E-13 2.6865E-14 -7.0896E-14 1.2971E-13 2.7947E-12
-6.5671E-15 2.6865E-14 9.0504E-14 -5.8399E-14 1.1149E-14 3.3819E-13
1.7391E-14 -7.0896E-14 -5.8399E-14 6.9375E-14 -2.9311E-14 -8.9286E-13
3.7520E-14 1.2971E-13 1.1149E-14 -2.9311E-14 1.7917E-13 1.1884E-12
-6.6739E-13 2.7947E-12 3.3819E-13 -8.9286E-13 1.1884E-12 3.5080E-11
# lat0 lon0 xBary yBary zBary JD0
0.148320 -143.102045 0.960357 0.000627 -0.222539 2456332.084338
# Heliocentric elements and errors
Epoch: 2456330.5000 = 2013/02/07
Mean Anomaly: 16.98391 +/- 0.022
Argument of Peri: 152.03434 +/- 0.038
Long of Asc Node: 35.73759 +/- 0.000
Inclination: 13.48286 +/- 0.000
Eccentricity: 0.22747315 +/- 0.0001
Semi-Major Axis: 39.37517233 +/- 0.0032
Time of Perihelion: 2452072.8758 +/- 5.4
Perihelion: 30.41837792 +/- 0.0048
Aphelion: 48.33196673 +/- 0.0057
Period (y) 247.0825 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -25.40488148 +/- 0.0003
Ecliptic Y -17.87122867 +/- 0.0002
Ecliptic Z 0.07965927 +/- 0.0000
Ecliptic XDOT 0.00165122 +/- 0.0000
Ecliptic YDOT -0.00286191 +/- 0.0000
Ecliptic ZDOT -0.00078821 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 31.06115199 +/- 0.0003
Geocenter to KBO 30.82607596 +/- 0.0004
# Hcoef: 8.49
The following table shows the complete astrometric record for 13GH137. 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 (13GH137) followed by the observatory code and reference code for the source of the astrometry.
2013 02 08.58356 14 18 26.307 -13 40 36.80 23.7r 13GH137 568 C~1XRX 2013 02 08.64781 14 18 26.291 -13 40 37.01 23.8r 13GH137 568 C~1XRX 2013 02 08.65196 14 18 26.270 -13 40 37.10 23.8r 13GH137 568 C~2KOF 2013 02 08.65608 14 18 26.276 -13 40 37.14 23.4r 13GH137 568 C~1XRX 2013 02 08.65996 14 18 26.266 -13 40 37.10 23.6r 13GH137 568 C~1XRX 2013 02 08.66384 14 18 26.273 -13 40 37.15 23.3r 13GH137 568 C~1XRX 2013 04 04.44170 14 15 21.385 -13 29 58.45 23.3r 13GH137 568 C~1XRX 2013 04 04.48219 14 15 21.149 -13 29 57.58 23.6r 13GH137 568 C~1XRX 2013 04 04.52263 14 15 20.908 -13 29 56.46 23.1r 13GH137 568 C~1XRX 2013 04 06.61498 14 15 08.858 -13 29 06.90 22.8r 13GH137 568 C~1XRX 2013 04 08.41579 14 14 58.333 -13 28 23.28 23.0r 13GH137 568 C~1XRX 2013 05 11.45033 14 11 35.737 -13 14 10.31 23.1r 13GH137 568 C~1XRX 2013 05 12.44830 14 11 29.814 -13 13 45.46 23.4r 13GH137 568 C~1XRX 2013 07 04.29497 14 07 57.468 -13 00 17.77 23.3r 13GH137 568 C~1XRX 2014 02 01.64786 14 26 20.399 -14 52 55.34 23.4r 13GH137 568 C~1XRX 2014 02 02.64572 14 26 21.208 -14 53 05.79 23.6r 13GH137 568 C~1XRX 2014 02 03.59026 14 26 21.886 -14 53 14.96 23.5r 13GH137 568 C~1XRX 2014 02 24.60898 14 26 06.955 -14 54 15.45 23.6r 13GH137 568 C~1XRX 2014 02 25.59204 14 26 04.909 -14 54 11.69 23.5r 13GH137 568 C~1XRX 2014 02 28.54001 14 25 58.070 -14 53 56.94 23.3r 13GH137 568 C~1XRX 2014 04 04.43905 14 23 30.532 -14 45 30.14 23.3r 13GH137 568 C~1XRX 2014 04 04.44293 14 23 30.511 -14 45 30.00 23.5r 13GH137 568 C~1XRX 2014 04 04.47867 14 23 30.311 -14 45 29.22 23.2r 13GH137 568 C~1XRX 2014 04 04.48274 14 23 30.283 -14 45 29.10 23.3r 13GH137 568 C~1XRX 2014 04 05.56427 14 23 24.181 -14 45 05.81 23.3r 13GH137 568 C~1XRX 2014 04 05.56944 14 23 24.141 -14 45 05.56 23.4r 13GH137 568 C~1XRX 2014 04 30.11337 14 20 54.92 -14 35 08.6 13GH137 W84 C~2fc7 2014 04 30.18231 14 20 54.48 -14 35 06.8 23.6V 13GH137 W84 C~2fc7 2014 05 01.10004 14 20 48.74 -14 34 43.4 13GH137 W84 C~2fc7 2014 05 01.16983 14 20 48.30 -14 34 41.5 13GH137 W84 C~2fc7 2014 05 22.44989 14 18 40.660 -14 25 57.68 23.6r 13GH137 568 C~1XRX 2014 05 25.44210 14 18 24.212 -14 24 50.45 23.4r 13GH137 568 C~1XRX 2014 06 26.33430 14 16 12.441 -14 16 18.29 23.4r 13GH137 568 C~1XRX 2014 07 18.30122 14 15 42.782 -14 15 24.00 23.5r 13GH137 568 C~1XRX 2015 04 25.288927 14 29 37.46 -15 51 36.1 13GH137 W84 C~8vD7 2015 04 25.323420 14 29 37.26 -15 51 35.1 13GH137 W84 C~8vD7 2015 04 25.357895 14 29 37.04 -15 51 34.2 13GH137 W84 C~8vD7 2015 04 26.284734 14 29 31.23 -15 51 11.9 13GH137 W84 C~8vD7 2015 04 26.320057 14 29 31.02 -15 51 11.0 13GH137 W84 C~8vD7 2015 04 26.354547 14 29 30.80 -15 51 10.3 13GH137 W84 C~8vD7 2016 05 11.35741 14 36 04.878 -16 57 32.76 23.4r 13GH137 568 C~2KOF 2016 05 11.43171 14 36 04.412 -16 57 31.02 23.2r 13GH137 568 C~2KOF
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 0.04 0.00 -0.04
2 0.0002 -0.15 0.18 -0.27 0.05
3 0.0002 -0.41 -0.06 -0.46 -0.11
4 0.0002 -0.32 0.06 -0.47 -0.10
5 0.0002 -0.47 -0.07 -0.48 -0.09
6 0.0002 -0.35 0.06 -0.49 -0.08
7 0.1502 -2756.31 0.01 -283.91 0.05
8 0.1503 -2759.84 0.03 -284.23 -0.03
9 0.1504 -2763.53 -0.10 -284.33 0.10
10 0.1561 -2945.83 0.09 -295.64 0.01
11 0.1611 -3105.18 -0.11 -305.24 -0.02
12 0.2515 -6178.97 -0.06 -483.55 0.16
13 0.2542 -6268.88 -0.06 -489.02 0.09
14 0.3989 -9466.82 0.10 -769.95 0.09
15 0.9803 7928.42 0.08 -1877.43 0.19
16 0.9831 7942.90 -0.18 -1883.60 -0.01
17 0.9856 7955.16 -0.10 -1889.15 0.05
18 1.0432 7769.13 0.02 -2015.68 -0.02
19 1.0459 7739.78 0.07 -2021.60 -0.02
20 1.0540 7640.99 0.04 -2039.31 -0.00
21 1.1495 5449.85 -0.07 -2245.79 -0.09
22 1.1495 5449.52 -0.07 -2245.76 -0.03
23 1.1496 5446.52 -0.01 -2245.96 0.00
24 1.1496 5446.10 -0.08 -2245.97 0.01
25 1.1526 5354.73 0.07 -2252.44 -0.21
26 1.1526 5354.10 -0.12 -2252.39 -0.13
27 1.2198 3110.99 -0.00 -2388.12 -0.08
28 1.2200 3104.36 -0.03 -2388.49 -0.04
29 1.2225 3017.93 -0.05 -2393.43 -0.14
30 1.2227 3011.27 -0.03 -2393.71 -0.00
31 1.2809 1087.87 0.10 -2502.84 -0.01
32 1.2891 840.06 -0.10 -2517.51 -0.06
33 1.3765 -1137.04 -0.04 -2662.91 -0.04
34 1.4366 -1562.04 0.06 -2753.91 0.09
35 2.2059 11759.07 -0.10 -4315.92 0.03
36 2.2060 11756.00 0.11 -4315.88 0.26
37 2.2061 11752.69 0.07 -4316.02 0.31
38 2.2086 11665.81 0.02 -4321.29 0.08
39 2.2087 11662.64 0.21 -4321.39 0.18
40 2.2088 11659.40 0.24 -4321.72 0.03
41 3.2519 18328.91 -0.15 -6349.64 -0.21
42 3.2522 18321.95 -0.08 -6350.03 -0.23
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.
13GH137 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.225 39.237 39.214 ecceobj 0.224 0.224 0.224 incobj 13.497 13.497 13.496 qmin 27.747 27.837 27.742 qmax 51.635 51.684 51.788 amean 39.455 39.455 39.455 amin 39.045 39.035 39.056 amax 39.956 39.991 39.993 emean 0.232 0.230 0.232 emin 0.173 0.174 0.172 emax 0.295 0.293 0.295 imean 12.611 12.710 12.621 imin 8.733 9.023 8.789 imax 15.047 15.030 15.033 excite_mean 0.321 0.321 0.321 fracstop 1.000 1.000 1.000 cjmean 2.934 2.934 2.934 libcent 0 179.6 180.5 180.8 libamp 0 68.2 72.9 68.1 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 121.8 123.8 122.5 kozaiamp 180.0 179.9 180.0