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: 15VA166
# Created Sun Dec 22 02:10:33 2024
# Orbit generated from Bernstein formalism
# Fitting 27 observations of 27
# Arc: 2.09y
# First observation: 2015/08/20
# Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
-0.000214 0.030884 0.000057 0.007221 0.028547 0.000000
# Chi-squared of fit: 4.94 DOF: 48 RMS: 0.08
# Min/Max residuals: -0.18 0.22
# Exact a, adot, b, bdot, g, gdot:
1.671864E-05 3.093373E-02 4.369077E-06 7.300552E-03 2.855061E-02 1.232924E-02
# Covariance matrix:
2.3066E-13 -5.2341E-14 -4.1403E-15 1.4873E-14 1.5737E-13 1.0127E-12
-5.2341E-14 7.2136E-13 -4.1375E-14 1.8064E-13 2.9845E-13 1.1980E-11
-4.1403E-15 -4.1375E-14 1.0622E-13 -8.6767E-14 -2.3284E-14 -8.2354E-13
1.4873E-14 1.8064E-13 -8.6767E-14 1.6444E-13 9.7942E-14 3.5808E-12
1.5737E-13 2.9845E-13 -2.3284E-14 9.7942E-14 3.1573E-13 6.5260E-12
1.0127E-12 1.1980E-11 -8.2354E-13 3.5808E-12 6.5260E-12 2.3760E-10
# lat0 lon0 xBary yBary zBary JD0
0.352506 54.656062 1.013660 0.000400 -0.043739 2457255.041279
# Heliocentric elements and errors
Epoch: 2457250.5000 = 2015/08/16
Mean Anomaly: 32.21043 +/- 0.028
Argument of Peri: 288.72314 +/- 0.018
Long of Asc Node: 51.49935 +/- 0.000
Inclination: 13.16493 +/- 0.001
Eccentricity: 0.41630432 +/- 0.0005
Semi-Major Axis: 47.65298614 +/- 0.0263
Time of Perihelion: 2446500.0246 +/- 2.6
Perihelion: 27.81484211 +/- 0.0293
Aphelion: 67.49113017 +/- 0.0449
Period (y) 328.9602 +/- 0.27
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 21.10942237 +/- 0.0004
Ecliptic Y 28.01869238 +/- 0.0006
Ecliptic Z 0.21566727 +/- 0.0000
Ecliptic XDOT -0.00174021 +/- 0.0000
Ecliptic YDOT 0.00267050 +/- 0.0000
Ecliptic ZDOT 0.00070740 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.08135328 +/- 0.0005
Geocenter to KBO 35.02552744 +/- 0.0007
# Hcoef: 8.83
The following table shows the complete astrometric record for 15VA166. 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 (15VA166) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.54049 03 28 49.440 +19 16 30.11 24.6w 15VA166 568 C~2lVd 2015 09 07.59637 03 28 44.196 +19 17 40.33 24.4w 15VA166 568 C~2lVd 2015 09 12.44325 03 28 36.477 +19 17 36.53 24.3w 15VA166 568 C~2lVd 2015 10 07.49180 03 27 17.777 +19 14 57.54 24.4w 15VA166 568 C~2lVd 2015 10 07.55020 03 27 17.508 +19 14 57.01 24.7w 15VA166 568 C~2lVd 2015 10 09.53094 03 27 08.824 +19 14 35.27 24.6w 15VA166 568 C~2lVd 2015 11 06.30734 03 24 41.273 +19 07 50.20 24.4r 15VA166 568 C~2lVd 2015 11 06.37060 03 24 40.874 +19 07 49.14 24.4r 15VA166 568 C~2lVd 2015 11 06.44142 03 24 40.455 +19 07 48.14 24.1r 15VA166 568 C~2lVd 2015 11 07.46098 03 24 34.415 +19 07 30.59 24.4w 15VA166 568 C~2lVd 2015 11 17.44217 03 23 34.652 +19 04 35.59 24.3w 15VA166 568 C~2lVd 2015 11 17.48946 03 23 34.367 +19 04 34.89 24.4w 15VA166 568 C~2lVd 2015 12 06.30809 03 21 44.639 +18 59 07.90 24.3w 15VA166 568 C~2lVd 2015 12 06.43481 03 21 43.939 +18 59 05.65 24.7w 15VA166 568 C~2lVd 2015 12 31.32982 03 19 46.516 +18 53 21.53 24.8w 15VA166 568 C~2lVd 2016 01 07.35914 03 19 22.707 +18 52 17.11 24.1w 15VA166 568 C~2lVd 2016 02 05.30505 03 18 41.808 +18 51 19.61 25.1w 15VA166 568 C~2lVd 2016 02 11.25843 03 18 45.680 +18 51 53.39 24.3w 15VA166 568 C~2lVd 2016 09 25.62935 03 34 54.735 +20 06 37.21 24.7w 15VA166 568 C~2lVd 2016 10 10.61736 03 33 57.228 +20 04 39.52 24.7w 15VA166 568 C~2lVd 2016 11 02.46775 03 31 58.391 +19 59 41.28 24.6w 15VA166 568 C~2lVd 2016 11 04.44390 03 31 46.944 +19 59 10.57 24.3w 15VA166 568 C~2lVd 2017 01 27.32921 03 25 34.663 +19 41 55.22 24.8w 15VA166 568 C~2lVd 2017 09 15.63753 03 42 08.442 +20 54 47.02 15VA166 568 C~2lVd 2017 09 16.58439 03 42 06.596 +20 54 46.70 24.5w 15VA166 568 C~2lVd 2017 09 17.58740 03 42 04.521 +20 54 45.89 24.9w 15VA166 568 C~2lVd 2017 09 22.61102 03 41 52.540 +20 54 37.05 24.5w 15VA166 568 C~2lVd
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 0.09 0.00 -0.07
2 0.0494 -54.88 -0.05 86.20 0.04
3 0.0627 -161.79 -0.18 109.18 -0.08
4 0.1313 -1281.15 0.07 228.04 -0.08
5 0.1314 -1284.97 -0.07 228.47 0.05
6 0.1369 -1409.53 -0.02 237.65 -0.02
7 0.2129 -3535.35 0.22 363.27 -0.14
8 0.2131 -3541.10 -0.06 363.65 -0.07
9 0.2133 -3547.10 0.08 364.17 0.10
10 0.2161 -3634.39 -0.02 368.54 0.02
11 0.2434 -4498.66 -0.02 411.23 -0.02
12 0.2435 -4502.75 0.07 411.56 0.11
13 0.2951 -6091.93 -0.02 487.83 0.13
14 0.2954 -6102.11 0.12 488.17 -0.06
15 0.3636 -7802.75 0.00 580.27 -0.03
16 0.3828 -8146.40 -0.10 604.74 0.11
17 0.4621 -8723.16 -0.13 698.65 0.02
18 0.4784 -8661.24 0.02 717.14 0.03
19 1.1009 5730.47 0.08 1684.72 0.06
20 1.1419 4914.90 -0.10 1761.28 -0.00
21 1.2045 3216.63 -0.02 1869.85 -0.02
22 1.2099 3052.57 -0.02 1878.66 -0.02
23 1.4395 -2294.53 0.06 2156.09 -0.02
24 2.0728 12338.52 -0.00 3100.60 0.04
25 2.0754 12313.15 0.02 3106.10 0.03
26 2.0782 12284.54 -0.07 3111.83 -0.08
27 2.0919 12118.38 0.06 3140.90 -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.
15VA166 quality flag:3 Type: 2:1E 2:1E 2:1E axisobj 48.400 48.481 48.319 ecceobj 0.425 0.426 0.424 incobj 13.127 13.127 13.128 qmin 27.203 27.216 27.226 qmax 69.410 69.475 69.214 amean 47.796 47.796 47.796 amin 47.322 47.258 47.265 amax 48.547 48.552 48.488 emean 0.390 0.377 0.389 emin 0.332 0.305 0.331 emax 0.430 0.431 0.430 imean 15.201 16.330 15.197 imin 11.907 11.946 11.903 imax 19.622 21.198 19.618 excite_mean 0.473 0.474 0.472 fracstop 1.000 1.000 1.000 cjmean 2.865 2.865 2.866 libcent 0 65.9 69.4 66.2 libamp 0 9.8 24.0 10.8 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 241.6 205.5 241.7 kozaiamp 180.0 180.0 180.0