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: 15VU168 # Created Tue Apr 1 01:10:40 2025 # Orbit generated from Bernstein formalism # Fitting 38 observations of 38 # Arc: 3.06y # First observation: 2014/11/23 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000118 0.021856 -0.000001 -0.000109 0.023089 0.000000 # Chi-squared of fit: 9.38 DOF: 70 RMS: 0.09 # Min/Max residuals: -0.18 0.28 # Exact a, adot, b, bdot, g, gdot: 1.457345E-05 2.183418E-02 2.315475E-07 -1.094935E-04 2.312232E-02 -1.699604E-03 # Covariance matrix: 7.7662E-13 -8.2573E-13 -2.7286E-16 2.2568E-15 -4.1056E-13 -9.0182E-12 -8.2573E-13 9.9358E-13 4.9015E-16 -2.9251E-15 5.0413E-13 1.1824E-11 -2.7286E-16 4.9015E-16 2.3223E-13 -1.2599E-13 -6.7060E-17 7.2102E-15 2.2568E-15 -2.9251E-15 -1.2599E-13 8.2111E-14 -1.6545E-15 -3.7853E-14 -4.1056E-13 5.0413E-13 -6.7060E-17 -1.6545E-15 3.5579E-13 6.3460E-12 -9.0182E-12 1.1824E-11 7.2102E-15 -3.7853E-14 6.3460E-12 1.5388E-10 # lat0 lon0 xBary yBary zBary JD0 -1.149391 46.832598 -0.235965 -0.019080 -0.959205 2456984.910848 # Heliocentric elements and errors Epoch: 2456980.5000 = 2014/11/19 Mean Anomaly: 277.89597 +/- 0.056 Argument of Peri: 346.69468 +/- 0.050 Long of Asc Node: 151.11771 +/- 0.036 Inclination: 1.15878 +/- 0.000 Eccentricity: 0.07487915 +/- 0.0006 Semi-Major Axis: 44.41755285 +/- 0.0048 Time of Perihelion: 2481640.4598 +/- 16.3 Perihelion: 41.09160445 +/- 0.0257 Aphelion: 47.74350126 +/- 0.0258 Period (y) 296.0330 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 30.06267632 +/- 0.0007 Ecliptic Y 32.39976532 +/- 0.0008 Ecliptic Z -0.86755122 +/- 0.0000 Ecliptic XDOT -0.00202769 +/- 0.0000 Ecliptic YDOT 0.00161676 +/- 0.0000 Ecliptic ZDOT -0.00000882 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.20703503 +/- 0.0008 Geocenter to KBO 43.24824766 +/- 0.0011 # Hcoef: 7.96
The following table shows the complete astrometric record for 15VU168. 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 (15VU168) followed by the observatory code and reference code for the source of the astrometry.
2014 11 23.41007 02 58 49.506 +15 45 46.95 24.3r 15VU168 568 C~2nvz 2015 08 11.62323 03 08 48.378 +16 28 28.67 24.7w 15VU168 568 C~2nvz 2015 09 07.53281 03 08 39.492 +16 27 08.81 24.5w 15VU168 568 C~2nvz 2015 09 12.52956 03 08 30.896 +16 26 26.43 24.7w 15VU168 568 C~2nvz 2015 10 07.47166 03 07 19.683 +16 21 05.68 24.5w 15VU168 568 C~2nvz 2015 10 08.47583 03 07 15.952 +16 20 49.40 24.7w 15VU168 568 C~2nvz 2015 10 08.53403 03 07 15.742 +16 20 48.50 24.7w 15VU168 568 C~2nvz 2015 11 06.29151 03 05 11.321 +16 12 01.71 24.3r 15VU168 568 C~2nvz 2015 11 06.35485 03 05 11.022 +16 12 00.69 24.1r 15VU168 568 C~2nvz 2015 11 06.42547 03 05 10.707 +16 11 59.32 24.7r 15VU168 568 C~2nvz 2015 11 06.49480 03 05 10.354 +16 11 57.80 24.3r 15VU168 568 C~2nvz 2015 11 07.51356 03 05 05.575 +16 11 37.76 24.5w 15VU168 568 C~2nvz 2015 11 17.27960 03 04 19.603 +16 08 27.91 24.7w 15VU168 568 C~2nvz 2015 12 13.34220 03 02 26.203 +16 00 50.43 24.5w 15VU168 568 C~2nvz 2015 12 13.40075 03 02 25.979 +16 00 49.66 24.5w 15VU168 568 C~2nvz 2016 01 01.39556 03 01 24.745 +15 56 54.56 24.8w 15VU168 568 C~2nvz 2016 01 07.34177 03 01 10.975 +15 56 04.67 24.5w 15VU168 568 C~2nvz 2016 02 04.27190 03 00 47.965 +15 55 10.91 24.5w 15VU168 568 C~2nvz 2016 02 10.26162 03 00 52.480 +15 55 39.61 24.5w 15VU168 568 C~2nvz 2016 09 07.55050 03 13 38.206 +16 46 40.37 15VU168 568 C~2nvz 2016 09 26.61279 03 12 55.300 +16 43 24.17 24.6w 15VU168 568 C~2nvz 2016 10 10.42589 03 12 07.995 +16 40 01.49 24.4w 15VU168 568 C~2nvz 2016 10 10.48430 03 12 07.756 +16 40 00.54 24.7w 15VU168 568 C~2nvz 2016 10 10.50790 03 12 07.664 +16 40 00.19 24.7w 15VU168 568 C~2nvz 2016 10 27.51417 03 10 55.872 +16 35 02.03 24.7w 15VU168 568 C~2nvz 2016 11 03.53920 03 10 23.451 +16 32 49.79 24.4w 15VU168 568 C~2nvz 2016 12 28.39306 03 06 32.749 +16 17 45.21 25.3w 15VU168 568 C~2nvz 2016 12 28.40104 03 06 32.727 +16 17 45.10 24.8w 15VU168 568 C~2nvz 2016 12 29.35861 03 06 29.975 +16 17 35.20 25.1w 15VU168 568 C~2nvz 2016 12 29.36878 03 06 29.946 +16 17 34.91 24.8w 15VU168 568 C~2nvz 2017 01 01.25561 03 06 22.098 +16 17 06.57 24.6w 15VU168 568 C~2nvz 2017 01 01.26608 03 06 22.077 +16 17 06.30 24.6w 15VU168 568 C~2nvz 2017 01 02.36563 03 06 19.232 +16 16 56.38 24.4w 15VU168 568 C~2nvz 2017 01 02.37586 03 06 19.211 +16 16 56.32 24.6w 15VU168 568 C~2nvz 2017 01 26.27054 03 05 43.306 +16 15 04.63 15VU168 568 C~2nvz 2017 09 15.60092 03 18 26.355 +17 04 49.79 24.5w 15VU168 568 C~2nvz 2017 09 22.58685 03 18 10.193 +17 03 37.90 15VU168 568 C~2nvz 2017 12 16.38250 03 12 15.915 +16 40 13.83 24.4w 15VU168 568 C~2nvz
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 0.07 0.00 -0.06
2 0.7152 9007.45 0.14 70.99 -0.13
3 0.7888 8862.48 -0.01 28.76 -0.01
4 0.8025 8731.72 -0.08 21.52 -0.05
5 0.8708 7656.65 0.08 -8.20 -0.03
6 0.8736 7600.47 -0.04 -9.20 -0.11
7 0.8737 7597.31 0.14 -9.24 -0.12
8 0.9524 5728.03 -0.18 -24.60 0.10
9 0.9526 5723.61 -0.09 -24.39 0.28
10 0.9528 5718.86 0.21 -24.46 0.20
11 0.9530 5713.55 -0.13 -24.52 0.13
12 0.9558 5641.80 -0.04 -24.82 -0.06
13 0.9825 4952.36 0.00 -24.51 -0.06
14 1.0539 3254.46 -0.09 -10.40 -0.11
15 1.0540 3251.14 0.01 -10.24 -0.02
16 1.1061 2337.43 0.08 10.57 0.15
17 1.1223 2132.78 -0.06 18.27 0.03
18 1.1988 1799.08 -0.06 59.70 -0.07
19 1.2152 1869.65 -0.05 68.98 -0.05
20 1.7909 13326.04 -0.02 5.14 0.01
21 1.8431 12677.21 -0.16 -20.26 -0.00
22 1.8809 11965.58 0.09 -34.36 -0.02
23 1.8811 11962.01 -0.06 -34.36 0.00
24 1.8812 11960.63 -0.04 -34.34 0.03
25 1.9277 10883.32 0.06 -45.18 -0.05
26 1.9470 10397.51 -0.01 -47.18 0.04
27 2.0971 6951.07 0.01 -16.34 0.00
28 2.0972 6950.74 0.03 -16.36 -0.03
29 2.0998 6909.87 -0.02 -15.03 0.13
30 2.0998 6909.39 -0.06 -15.19 -0.05
31 2.1077 6792.83 0.07 -11.49 0.04
32 2.1078 6792.46 0.12 -11.67 -0.16
33 2.1108 6750.30 -0.01 -9.98 0.08
34 2.1108 6749.99 0.08 -9.95 0.09
35 2.1762 6221.66 0.01 24.55 -0.05
36 2.8123 17626.16 0.02 -28.80 0.01
37 2.8314 17381.95 0.00 -38.08 -0.08
38 3.0636 12078.94 -0.02 -52.90 -0.02
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.
15VU168 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.736 44.747 44.725 ecceobj 0.071 0.072 0.070 incobj 1.157 1.157 1.157 qmin 40.262 40.177 40.278 qmax 48.771 48.899 48.765 amean 44.407 44.419 44.396 amin 44.051 44.064 44.040 amax 44.779 44.795 44.765 emean 0.075 0.076 0.074 emin 0.060 0.061 0.059 emax 0.090 0.092 0.089 imean 1.538 1.537 1.540 imin 0.810 0.807 0.813 imax 2.185 2.185 2.185 excite_mean 0.080 0.081 0.079 fracstop 1.000 1.000 1.000 cjmean 3.099 3.099 3.099 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 187.9 187.5 188.3 kozaiamp 180.0 180.0 180.0