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: 15VP168 # Created Mon Apr 28 01:10:41 2025 # Orbit generated from Bernstein formalism # Fitting 36 observations of 36 # Arc: 2.19y # First observation: 2014/11/17 # Last observation: 2017/01/26 Preliminary a, adot, b, bdot, g, gdot: -0.000010 0.020721 -0.000001 0.000712 0.022284 0.000000 # Chi-squared of fit: 8.48 DOF: 66 RMS: 0.09 # Min/Max residuals: -0.17 0.30 # Exact a, adot, b, bdot, g, gdot: 1.507481E-05 2.082229E-02 -9.325084E-07 7.169046E-04 2.240801E-02 -1.186216E-04 # Covariance matrix: 3.3061E-13 -4.4547E-13 4.7498E-15 -1.1274E-14 -2.1682E-13 -6.6862E-12 -4.4547E-13 8.5052E-13 -1.1116E-14 2.6487E-14 4.6205E-13 1.5693E-11 4.7498E-15 -1.1116E-14 1.8890E-13 -1.2425E-13 -6.6710E-15 -2.3456E-13 -1.1274E-14 2.6487E-14 -1.2425E-13 1.0495E-13 1.5666E-14 5.5986E-13 -2.1682E-13 4.6205E-13 -6.6710E-15 1.5666E-14 3.8084E-13 9.3148E-12 -6.6862E-12 1.5693E-11 -2.3456E-13 5.5986E-13 9.3148E-12 3.3157E-10 # lat0 lon0 xBary yBary zBary JD0 -0.352118 47.210517 -0.125217 -0.005884 -0.981501 2456978.797448 # Heliocentric elements and errors Epoch: 2456970.5000 = 2014/11/09 Mean Anomaly: 256.24509 +/- 2.174 Argument of Peri: 94.44941 +/- 2.170 Long of Asc Node: 57.26868 +/- 0.004 Inclination: 2.00430 +/- 0.001 Eccentricity: 0.00561214 +/- 0.0008 Semi-Major Axis: 45.54556339 +/- 0.0030 Time of Perihelion: 2489327.9070 +/- 677.9 Perihelion: 45.28995539 +/- 0.0387 Aphelion: 45.80117139 +/- 0.0387 Period (y) 307.3812 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 30.88648824 +/- 0.0008 Ecliptic Y 33.55593051 +/- 0.0009 Ecliptic Z -0.27431537 +/- 0.0000 Ecliptic XDOT -0.00188076 +/- 0.0000 Ecliptic YDOT 0.00171302 +/- 0.0000 Ecliptic ZDOT 0.00008778 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.60757478 +/- 0.0009 Geocenter to KBO 44.62690201 +/- 0.0012 # Hcoef: 7.90
The following table shows the complete astrometric record for 15VP168. 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 (15VP168) followed by the observatory code and reference code for the source of the astrometry.
2014 11 17.29667 02 59 23.837 +16 38 04.47 23.9r 15VP168 568 C~2nvy 2014 11 17.40560 02 59 23.352 +16 38 02.22 24.4r 15VP168 568 C~2nvy 2014 11 17.51968 02 59 22.822 +16 38 00.02 24.3r 15VP168 568 C~2nvy 2014 11 23.41643 02 58 56.354 +16 36 11.16 24.5r 15VP168 568 C~2nvy 2015 08 11.60566 03 08 33.008 +17 18 08.40 24.9w 15VP168 568 C~2nvy 2015 09 06.63576 03 08 24.923 +17 17 35.62 25.4w 15VP168 568 C~2nvy 2015 09 12.52541 03 08 15.118 +17 16 56.30 24.9w 15VP168 568 C~2nvy 2015 10 07.46582 03 07 05.227 +17 12 16.00 24.8w 15VP168 568 C~2nvy 2015 10 08.47003 03 07 01.577 +17 12 01.45 24.5w 15VP168 568 C~2nvy 2015 10 08.52822 03 07 01.364 +17 12 00.64 24.7w 15VP168 568 C~2nvy 2015 11 06.28626 03 04 59.790 +17 03 52.45 24.2r 15VP168 568 C~2nvy 2015 11 06.34963 03 04 59.486 +17 03 51.29 24.3r 15VP168 568 C~2nvy 2015 11 06.42017 03 04 59.165 +17 03 50.04 24.6r 15VP168 568 C~2nvy 2015 11 06.48956 03 04 58.844 +17 03 48.64 24.4r 15VP168 568 C~2nvy 2015 11 07.50772 03 04 54.166 +17 03 29.96 24.5w 15VP168 568 C~2nvy 2015 11 17.27378 03 04 09.302 +17 00 29.45 24.6w 15VP168 568 C~2nvy 2015 11 17.32308 03 04 09.054 +17 00 28.60 24.6w 15VP168 568 C~2nvy 2015 12 06.40182 03 02 45.671 +16 54 54.29 24.7w 15VP168 568 C~2nvy 2015 12 13.33636 03 02 18.548 +16 53 06.01 24.5w 15VP168 568 C~2nvy 2015 12 13.39494 03 02 18.319 +16 53 05.18 24.5w 15VP168 568 C~2nvy 2016 01 01.38920 03 01 18.438 +16 49 09.19 24.3w 15VP168 568 C~2nvy 2016 01 02.35555 03 01 16.058 +16 48 59.75 24.9w 15VP168 568 C~2nvy 2016 01 07.33598 03 01 04.936 +16 48 17.17 25.4w 15VP168 568 C~2nvy 2016 02 03.22261 03 00 41.621 +16 47 01.43 24.6w 15VP168 568 C~2nvy 2016 02 10.25584 03 00 46.275 +16 47 27.04 24.8w 15VP168 568 C~2nvy 2016 09 07.55628 03 13 04.938 +17 38 42.17 15VP168 568 C~2nvy 2016 09 26.61685 03 12 22.634 +17 35 57.68 24.6w 15VP168 568 C~2nvy 2016 10 10.43169 03 11 36.260 +17 32 57.08 24.6w 15VP168 568 C~2nvy 2016 10 10.49031 03 11 36.036 +17 32 56.20 24.7w 15VP168 568 C~2nvy 2016 10 27.52577 03 10 25.769 +17 28 21.73 24.9w 15VP168 568 C~2nvy 2016 11 03.55078 03 09 54.124 +17 26 17.90 25.0w 15VP168 568 C~2nvy 2016 12 28.38756 03 06 09.244 +17 11 40.82 24.6w 15VP168 568 C~2nvy 2016 12 29.35312 03 06 06.534 +17 11 30.49 24.8w 15VP168 568 C~2nvy 2017 01 01.25010 03 05 58.835 +17 11 00.97 24.7w 15VP168 568 C~2nvy 2017 01 02.36014 03 05 56.051 +17 10 50.50 24.7w 15VP168 568 C~2nvy 2017 01 26.25322 03 05 20.816 +17 08 44.51 24.3w 15VP168 568 C~2nvy
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 -0.08 0.00 0.30
2 0.0003 -7.32 0.10 -0.19 0.01
3 0.0006 -15.25 0.03 -0.16 -0.03
4 0.0168 -410.95 -0.07 2.81 -0.03
5 0.7319 8240.74 0.00 132.13 -0.07
6 0.8031 8120.21 0.17 131.94 -0.08
7 0.8192 7974.16 -0.07 132.16 -0.02
8 0.8875 6933.06 -0.04 134.66 -0.07
9 0.8903 6878.72 -0.09 134.92 0.01
10 0.8904 6875.55 -0.01 134.97 0.03
11 0.9692 5064.27 0.01 142.88 0.00
12 0.9693 5059.75 -0.13 142.97 0.04
13 0.9695 5054.98 -0.01 143.03 0.04
14 0.9697 5050.17 -0.01 142.95 -0.08
15 0.9725 4980.49 -0.05 143.46 0.03
16 0.9993 4311.88 0.26 147.40 -0.17
17 0.9994 4308.23 0.01 147.57 -0.05
18 1.0516 3065.70 0.10 157.85 -0.02
19 1.0706 2661.59 -0.06 162.15 -0.04
20 1.0708 2658.20 -0.12 162.26 0.03
21 1.1228 1766.75 0.06 175.58 0.14
22 1.1254 1731.30 -0.02 176.08 -0.08
23 1.1391 1566.05 -0.07 179.90 -0.02
24 1.2127 1223.42 0.14 201.01 -0.13
25 1.2319 1294.76 -0.05 206.85 0.08
26 1.8077 12330.05 -0.01 278.52 0.11
27 1.8599 11701.18 -0.09 280.50 -0.02
28 1.8977 11011.80 -0.01 283.11 0.06
29 1.8979 11008.47 -0.01 283.12 0.03
30 1.9445 9963.82 0.17 287.72 -0.07
31 1.9637 9493.34 0.01 290.14 -0.13
32 2.1139 6150.99 0.04 320.06 0.08
33 2.1165 6110.78 -0.05 320.76 0.12
34 2.1244 5996.49 -0.10 322.58 -0.03
35 2.1275 5955.21 0.05 323.45 0.03
36 2.1929 5434.64 -0.02 340.86 0.04
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.
15VP168 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.894 45.903 45.885 ecceobj 0.006 0.006 0.006 incobj 1.999 1.999 1.999 qmin 44.513 44.522 44.470 qmax 46.713 46.765 46.697 amean 45.551 45.560 45.542 amin 45.198 45.206 45.189 amax 45.905 45.912 45.888 emean 0.008 0.008 0.008 emin 0.000 0.000 0.000 emax 0.018 0.019 0.018 imean 1.228 1.228 1.227 imin 0.820 0.821 0.817 imax 1.600 1.601 1.601 excite_mean 0.023 0.023 0.023 fracstop 1.000 1.000 1.000 cjmean 3.120 3.120 3.120 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 160.5 160.8 160.2 kozaiamp 180.0 180.0 179.9