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: 15VP166 # Created Sun Apr 27 01:10:39 2025 # Orbit generated from Bernstein formalism # Fitting 26 observations of 26 # Arc: 3.08y # First observation: 2014/11/17 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: 0.000370 0.023692 0.000126 0.009231 0.023475 0.000000 # Chi-squared of fit: 9.52 DOF: 46 RMS: 0.11 # Min/Max residuals: -0.37 0.27 # Exact a, adot, b, bdot, g, gdot: 1.672629E-05 2.448867E-02 6.434570E-06 9.535454E-03 2.406186E-02 8.998452E-03 # Covariance matrix: 3.1478E-13 -3.4087E-13 4.1132E-14 -9.0173E-14 -1.7376E-13 -3.2964E-12 -3.4087E-13 5.4142E-13 -7.8779E-14 1.7275E-13 2.4667E-13 6.3230E-12 4.1132E-14 -7.8779E-14 1.8844E-13 -1.2500E-13 -3.9381E-14 -1.0783E-12 -9.0173E-14 1.7275E-13 -1.2500E-13 1.4276E-13 8.6250E-14 2.3648E-12 -1.7376E-13 2.4667E-13 -3.9381E-14 8.6250E-14 3.2004E-13 3.1393E-12 -3.2964E-12 6.3230E-12 -1.0783E-12 2.3648E-12 3.1393E-12 8.6576E-11 # lat0 lon0 xBary yBary zBary JD0 -0.337214 48.638778 -0.100448 -0.005647 -0.984347 2456978.782278 # Heliocentric elements and errors Epoch: 2456970.5000 = 2014/11/09 Mean Anomaly: 17.17984 +/- 0.015 Argument of Peri: 301.88051 +/- 0.026 Long of Asc Node: 49.62296 +/- 0.000 Inclination: 21.29469 +/- 0.001 Eccentricity: 0.52335416 +/- 0.0004 Semi-Major Axis: 75.19609801 +/- 0.0434 Time of Perihelion: 2445604.4910 +/- 1.5 Perihelion: 35.84190710 +/- 0.0359 Aphelion: 114.55028891 +/- 0.0722 Period (y) 652.0804 +/- 0.56 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.03414484 +/- 0.0006 Ecliptic Y 31.99907579 +/- 0.0007 Ecliptic Z -0.24434372 +/- 0.0000 Ecliptic XDOT -0.00141485 +/- 0.0000 Ecliptic YDOT 0.00260957 +/- 0.0000 Ecliptic ZDOT 0.00107904 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.54308207 +/- 0.0007 Geocenter to KBO 41.55955060 +/- 0.0010 # Hcoef: 8.13
The following table shows the complete astrometric record for 15VP166. 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 (15VP166) followed by the observatory code and reference code for the source of the astrometry.
2014 11 17.28150 03 05 06.765 +17 02 47.90 24.3r 15VP166 568 C~2lVf 2014 11 17.50402 03 05 05.663 +17 02 44.66 24.1r 15VP166 568 C~2lVf 2014 11 19.29385 03 04 56.888 +17 02 18.86 24.2r 15VP166 568 C~2lVf 2014 11 23.39737 03 04 36.896 +17 01 20.31 24.2r 15VP166 568 C~2lVf 2015 08 11.57225 03 14 43.539 +18 05 49.12 24.8w 15VP166 568 C~2lVf 2015 09 06.61892 03 14 38.027 +18 07 51.69 24.7w 15VP166 568 C~2lVf 2015 09 12.50905 03 14 28.226 +18 07 46.01 24.5w 15VP166 568 C~2lVf 2015 10 07.43408 03 13 15.606 +18 05 22.31 25.3w 15VP166 568 C~2lVf 2015 10 08.44583 03 13 11.718 +18 05 13.00 24.7w 15VP166 568 C~2lVf 2015 10 08.50488 03 13 11.497 +18 05 12.49 24.7w 15VP166 568 C~2lVf 2015 11 07.35377 03 10 56.661 +17 59 08.02 24.2r 15VP166 568 C~2lVf 2015 11 07.39585 03 10 56.449 +17 59 07.40 24.4r 15VP166 568 C~2lVf 2015 11 07.43803 03 10 56.244 +17 59 06.85 24.8r 15VP166 568 C~2lVf 2015 11 10.52298 03 10 40.964 +17 58 23.22 24.6w 15VP166 568 C~2lVf 2015 11 17.36965 03 10 07.066 +17 56 46.07 24.5w 15VP166 568 C~2lVf 2015 11 17.41626 03 10 06.836 +17 56 45.39 24.5w 15VP166 568 C~2lVf 2015 12 13.31287 03 08 07.263 +17 51 06.23 24.6w 15VP166 568 C~2lVf 2015 12 13.37141 03 08 07.028 +17 51 05.59 24.7w 15VP166 568 C~2lVf 2016 11 02.53733 03 16 13.166 +18 52 24.21 15VP166 568 C~2lVf 2016 11 04.41248 03 16 04.041 +18 51 59.63 15VP166 568 C~2lVf 2016 12 24.30698 03 12 18.308 +18 41 36.04 15VP166 568 C~2lVf 2017 01 02.40920 03 11 50.003 +18 40 25.62 15VP166 568 C~2lVf 2017 01 26.29981 03 11 09.055 +18 39 25.19 23.9w 15VP166 568 C~2lVf 2017 09 15.60695 03 24 04.492 +19 49 07.89 24.7w 15VP166 568 C~2lVf 2017 09 22.59291 03 23 48.258 +19 48 55.18 25.1w 15VP166 568 C~2lVf 2017 12 16.36391 03 17 41.808 +19 34 01.53 24.9w 15VP166 568 C~2lVf
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 -0.03
2 0.0006 -16.09 0.03 1.23 -0.09
3 0.0055 -144.17 0.12 11.04 0.01
4 0.0167 -435.94 -0.06 33.70 0.14
5 0.7318 8966.50 0.27 1425.01 0.06
6 0.8031 8922.83 -0.37 1564.06 0.27
7 0.8192 8786.28 -0.04 1595.32 -0.11
8 0.8875 7748.03 0.07 1729.81 -0.21
9 0.8903 7692.03 -0.13 1735.50 0.00
10 0.8904 7688.85 0.04 1735.84 0.00
11 0.9721 5735.92 0.13 1896.13 0.07
12 0.9723 5732.84 0.10 1896.34 0.04
13 0.9724 5729.87 0.21 1896.59 0.05
14 0.9808 5507.97 -0.10 1912.90 -0.04
15 0.9996 5015.60 -0.04 1949.02 -0.03
16 0.9997 5012.26 0.01 1949.25 -0.07
17 1.0706 3276.49 -0.11 2083.17 -0.03
18 1.0707 3273.09 0.03 2083.47 -0.05
19 1.9610 10933.90 0.04 3792.91 -0.04
20 1.9661 10802.06 -0.09 3802.89 -0.03
21 2.1027 7538.25 0.03 4043.98 -0.04
22 2.1277 7131.22 0.10 4082.97 0.00
23 2.1931 6553.55 -0.07 4179.83 0.10
24 2.8291 18292.71 0.04 5392.64 -0.01
25 2.8482 18065.93 -0.01 5437.52 0.03
26 3.0803 12802.39 -0.06 5884.91 0.00
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.
15VP166 quality flag:2 Type: SCATNEAR 4:1EEE SCATNEAR axisobj 76.626 76.756 76.495 ecceobj 0.532 0.534 0.531 incobj 21.244 21.244 21.244 qmin 34.644 34.979 34.750 qmax 120.389 119.798 118.143 amean 75.659 75.872 75.254 amin 74.322 74.479 74.151 amax 77.984 77.788 76.985 emean 0.523 0.526 0.520 emin 0.503 0.514 0.503 emax 0.544 0.541 0.537 imean 20.697 20.674 20.828 imin 19.563 20.171 19.812 imax 22.044 21.166 21.813 excite_mean 0.632 0.634 0.630 fracstop 1.000 1.000 1.000 cjmean 2.925 2.923 2.924 libcent 0 -180.0 179.2 -180.0 libamp 0 -180.0 171.4 -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 166.4 161.1 193.5 kozaiamp 180.0 180.0 180.0