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: 15VB171 # Created Sun Apr 27 01:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 31 observations of 31 # Arc: 2.28y # First observation: 2015/09/06 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000094 0.019106 -0.000002 0.000673 0.021527 0.000000 # Chi-squared of fit: 5.35 DOF: 56 RMS: 0.07 # Min/Max residuals: -0.17 0.21 # Exact a, adot, b, bdot, g, gdot: 1.351751E-05 1.898616E-02 7.598385E-07 6.698495E-04 2.149923E-02 1.066685E-03 # Covariance matrix: 2.4253E-13 2.1643E-14 5.6060E-16 4.4607E-15 2.0414E-13 3.8990E-12 2.1643E-14 2.7598E-13 -6.2111E-16 9.4221E-15 2.1519E-13 7.9106E-12 5.6060E-16 -6.2111E-16 1.0712E-13 -7.2521E-14 2.4475E-16 -2.6452E-14 4.4607E-15 9.4221E-15 -7.2521E-14 8.7607E-14 1.0479E-14 3.9481E-13 2.0414E-13 2.1519E-13 2.4475E-16 1.0479E-14 3.5126E-13 8.9662E-12 3.8990E-12 7.9106E-12 -2.6452E-14 3.9481E-13 8.9662E-12 3.3140E-10 # lat0 lon0 xBary yBary zBary JD0 -1.329393 51.253015 0.935423 -0.008767 -0.384158 2457272.124289 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 152.87694 +/- 0.595 Argument of Peri: 169.82101 +/- 0.594 Long of Asc Node: 83.59564 +/- 0.012 Inclination: 2.38860 +/- 0.001 Eccentricity: 0.07905214 +/- 0.0003 Semi-Major Axis: 43.77273768 +/- 0.0034 Time of Perihelion: 2412350.1144 +/- 174.7 Perihelion: 40.31240891 +/- 0.0153 Aphelion: 47.23306645 +/- 0.0154 Period (y) 289.6101 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 30.07001297 +/- 0.0008 Ecliptic Y 35.98076073 +/- 0.0010 Ecliptic Z -1.07907398 +/- 0.0000 Ecliptic XDOT -0.00180134 +/- 0.0000 Ecliptic YDOT 0.00161431 +/- 0.0000 Ecliptic ZDOT 0.00008218 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.90400008 +/- 0.0009 Geocenter to KBO 46.51330021 +/- 0.0013 # Hcoef: 7.65
The following table shows the complete astrometric record for 15VB171. 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 (15VB171) followed by the observatory code and reference code for the source of the astrometry.
2015 09 06.62350 03 16 45.180 +16 47 23.86 24.8w 15VB171 568 C~2nw8 2015 09 12.51312 03 16 36.410 +16 46 42.62 24.4w 15VB171 568 C~2nw8 2015 10 07.54436 03 15 30.685 +16 42 02.96 24.6w 15VB171 568 C~2nw8 2015 10 07.60373 03 15 30.483 +16 42 02.18 24.6w 15VB171 568 C~2nw8 2015 10 09.58362 03 15 23.569 +16 41 33.80 24.6w 15VB171 568 C~2nw8 2015 11 07.33788 03 13 25.228 +16 33 43.22 24.5r 15VB171 568 C~2nw8 2015 11 07.38006 03 13 25.027 +16 33 42.54 24.6r 15VB171 568 C~2nw8 2015 11 07.42224 03 13 24.840 +16 33 41.81 24.2r 15VB171 568 C~2nw8 2015 11 10.50536 03 13 10.950 +16 32 47.95 24.7w 15VB171 568 C~2nw8 2015 11 17.35218 03 12 40.061 +16 30 48.79 24.4w 15VB171 568 C~2nw8 2015 11 17.39878 03 12 39.843 +16 30 47.90 24.5w 15VB171 568 C~2nw8 2015 12 06.36096 03 11 17.625 +16 25 37.57 24.6w 15VB171 568 C~2nw8 2015 12 06.49848 03 11 17.049 +16 25 35.62 24.2w 15VB171 568 C~2nw8 2016 01 01.34872 03 09 48.719 +16 20 21.20 25.0w 15VB171 568 C~2nw8 2016 02 05.28768 03 09 06.323 +16 18 42.68 24.5w 15VB171 568 C~2nw8 2016 02 10.30807 03 09 08.933 +16 19 04.19 24.4w 15VB171 568 C~2nw8 2016 09 26.59656 03 20 24.759 +17 03 24.93 24.7w 15VB171 568 C~2nw8 2016 10 10.40230 03 19 40.866 +17 00 27.64 24.4w 15VB171 568 C~2nw8 2016 10 10.46065 03 19 40.650 +17 00 26.84 25.2w 15VB171 568 C~2nw8 2016 10 27.49100 03 18 33.101 +16 56 03.01 24.6w 15VB171 568 C~2nw8 2016 12 24.29598 03 14 31.154 +16 41 11.64 24.3w 15VB171 568 C~2nw8 2016 12 24.31334 03 14 31.099 +16 41 11.36 24.6w 15VB171 568 C~2nw8 2017 01 02.39822 03 14 04.815 +16 39 43.81 24.2w 15VB171 568 C~2nw8 2017 01 02.41556 03 14 04.779 +16 39 43.64 24.1w 15VB171 568 C~2nw8 2017 01 26.32220 03 13 25.879 +16 37 57.93 24.6w 15VB171 568 C~2nw8 2017 01 26.32908 03 13 25.864 +16 37 58.03 25.0w 15VB171 568 C~2nw8 2017 09 17.60038 03 25 08.812 +17 23 39.33 24.4w 15VB171 568 C~2nw8 2017 09 23.57901 03 24 55.498 +17 22 44.15 15VB171 568 C~2nw8 2017 09 23.58734 03 24 55.470 +17 22 44.15 24.7w 15VB171 568 C~2nw8 2017 09 24.59522 03 24 52.975 +17 22 33.91 24.8w 15VB171 568 C~2nw8 2017 12 16.39181 03 19 21.574 +17 02 04.95 24.5w 15VB171 568 C~2nw8
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 -0.06
2 0.0161 -132.34 -0.05 -7.06 -0.01
3 0.0847 -1116.71 -0.08 -30.73 0.02
4 0.0848 -1119.72 0.02 -30.72 0.06
5 0.0902 -1223.02 -0.07 -32.12 -0.03
6 0.1690 -2987.99 0.21 -39.01 -0.02
7 0.1691 -2990.96 0.10 -38.90 0.06
8 0.1692 -2993.74 0.18 -38.90 0.04
9 0.1776 -3200.64 -0.01 -38.07 0.09
10 0.1964 -3660.65 -0.08 -35.42 0.03
11 0.1965 -3663.91 -0.17 -35.45 -0.04
12 0.2484 -4887.05 -0.08 -20.26 -0.11
13 0.2488 -4895.56 -0.13 -19.93 0.05
14 0.3196 -6205.45 0.03 17.16 0.00
15 0.4152 -6820.38 0.02 86.34 0.01
16 0.4290 -6778.36 0.05 96.95 -0.00
17 1.0567 3292.58 -0.07 116.22 0.01
18 1.0945 2638.52 0.04 106.00 -0.11
19 1.0947 2635.32 0.00 106.02 -0.08
20 1.1413 1630.84 0.02 100.28 -0.00
21 1.2996 -1955.63 -0.05 143.98 0.13
22 1.2996 -1956.46 -0.05 143.92 0.03
23 1.3245 -2343.92 -0.05 158.80 -0.01
24 1.3246 -2344.46 0.08 158.77 -0.07
25 1.3900 -2911.69 0.08 204.21 -0.12
26 1.3900 -2911.87 -0.03 204.37 0.02
27 2.0314 7540.11 0.03 263.31 0.09
28 2.0478 7341.52 -0.00 257.48 -0.08
29 2.0478 7341.14 -0.08 257.58 0.03
30 2.0506 7303.95 0.06 256.59 -0.07
31 2.2773 2396.02 0.01 271.08 0.11
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.
15VB171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.177 44.189 44.165 ecceobj 0.073 0.074 0.073 incobj 2.386 2.386 2.386 qmin 39.901 39.882 39.893 qmax 48.151 48.152 48.083 amean 43.883 43.894 43.872 amin 43.538 43.544 43.519 amax 44.250 44.258 44.242 emean 0.070 0.070 0.069 emin 0.053 0.053 0.052 emax 0.088 0.088 0.087 imean 0.766 0.765 0.767 imin 0.215 0.212 0.216 imax 1.156 1.156 1.157 excite_mean 0.071 0.072 0.071 fracstop 1.000 1.000 1.000 cjmean 3.094 3.094 3.094 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 182.2 181.8 182.4 kozaiamp 180.0 179.9 180.0