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: 15VK171 # Created Mon Apr 28 01:10:43 2025 # Orbit generated from Bernstein formalism # Fitting 28 observations of 28 # Arc: 2.26y # First observation: 2015/09/12 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000092 0.021015 -0.000003 0.001816 0.022665 0.000000 # Chi-squared of fit: 9.22 DOF: 50 RMS: 0.10 # Min/Max residuals: -0.28 0.21 # Exact a, adot, b, bdot, g, gdot: 1.372786E-05 2.087004E-02 1.908641E-06 1.803040E-03 2.265830E-02 -8.012329E-04 # Covariance matrix: 2.5953E-13 -3.2616E-14 -1.2799E-15 9.6983E-15 1.8331E-13 2.9314E-12 -3.2616E-14 3.0645E-13 -5.9567E-15 2.7263E-14 1.8744E-13 8.0678E-12 -1.2799E-15 -5.9567E-15 1.3358E-13 -1.0038E-13 -5.0429E-15 -2.5948E-13 9.6983E-15 2.7263E-14 -1.0038E-13 1.2535E-13 2.7433E-14 1.1882E-12 1.8331E-13 1.8744E-13 -5.0429E-15 2.7433E-14 3.2080E-13 8.1877E-12 2.9314E-12 8.0678E-12 -2.5948E-13 1.1882E-12 8.1877E-12 3.5163E-10 # lat0 lon0 xBary yBary zBary JD0 -1.483623 51.817147 0.896195 -0.011913 -0.465520 2457277.997529 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 243.72213 +/- 0.386 Argument of Peri: 106.49074 +/- 0.377 Long of Asc Node: 67.25197 +/- 0.003 Inclination: 5.13040 +/- 0.001 Eccentricity: 0.06974210 +/- 0.0007 Semi-Major Axis: 43.11485168 +/- 0.0053 Time of Perihelion: 2490669.4900 +/- 110.7 Perihelion: 40.10793143 +/- 0.0320 Aphelion: 46.12177192 +/- 0.0321 Period (y) 283.1057 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.26152354 +/- 0.0007 Ecliptic Y 34.49123942 +/- 0.0009 Ecliptic Z -1.14258465 +/- 0.0000 Ecliptic XDOT -0.00204039 +/- 0.0000 Ecliptic YDOT 0.00148082 +/- 0.0000 Ecliptic ZDOT 0.00022035 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.60565894 +/- 0.0008 Geocenter to KBO 44.13393513 +/- 0.0011 # Hcoef: 8.48
The following table shows the complete astrometric record for 15VK171. 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 (15VK171) followed by the observatory code and reference code for the source of the astrometry.
2015 09 12.49674 03 19 11.746 +16 47 12.21 25.1w 15VK171 568 C~2nw9 2015 10 07.54436 03 18 04.149 +16 42 39.47 25.5w 15VK171 568 C~2nw9 2015 10 09.58362 03 17 56.757 +16 42 10.51 25.1w 15VK171 568 C~2nw9 2015 11 07.33788 03 15 53.234 +16 34 21.80 24.6r 15VK171 568 C~2nw9 2015 11 07.38006 03 15 53.026 +16 34 21.07 24.9r 15VK171 568 C~2nw9 2015 11 07.42224 03 15 52.843 +16 34 20.36 24.8r 15VK171 568 C~2nw9 2015 11 10.50536 03 15 38.266 +16 33 26.40 25.0w 15VK171 568 C~2nw9 2015 11 17.35218 03 15 05.860 +16 31 27.51 25.0w 15VK171 568 C~2nw9 2015 11 17.39878 03 15 05.635 +16 31 26.71 24.9w 15VK171 568 C~2nw9 2016 01 01.34872 03 12 05.024 +16 21 06.26 25.1w 15VK171 568 C~2nw9 2016 01 08.25624 03 11 47.636 +16 20 16.25 25.1w 15VK171 568 C~2nw9 2016 02 05.28768 03 11 19.336 +16 19 48.35 25.9w 15VK171 568 C~2nw9 2016 02 10.30807 03 11 21.895 +16 20 14.45 24.9w 15VK171 568 C~2nw9 2016 09 07.62568 03 24 01.294 +17 11 50.30 15VK171 568 C~2nw9 2016 09 26.58416 03 23 21.865 +17 09 12.13 25.5w 15VK171 568 C~2nw9 2016 10 09.54522 03 22 39.573 +17 06 31.07 24.9w 15VK171 568 C~2nw9 2016 10 09.61729 03 22 39.302 +17 06 29.96 25.0w 15VK171 568 C~2nw9 2016 11 02.51995 03 20 58.202 +17 00 16.70 25.3w 15VK171 568 C~2nw9 2016 11 02.52573 03 20 58.174 +17 00 16.66 25.1w 15VK171 568 C~2nw9 2016 11 04.39506 03 20 49.479 +16 59 45.17 25.2w 15VK171 568 C~2nw9 2016 11 04.40084 03 20 49.450 +16 59 45.08 25.1w 15VK171 568 C~2nw9 2016 12 24.33186 03 17 10.476 +16 47 09.72 25.5w 15VK171 568 C~2nw9 2017 01 02.43457 03 16 42.432 +16 45 44.08 25.4w 15VK171 568 C~2nw9 2017 01 26.32908 03 16 00.570 +16 44 08.92 25.7w 15VK171 568 C~2nw9 2017 01 27.28684 03 15 59.971 +16 44 09.35 25.1w 15VK171 568 C~2nw9 2017 09 21.62755 03 28 21.398 +17 34 01.07 25.2w 15VK171 568 C~2nw9 2017 09 22.56874 03 28 19.154 +17 33 52.67 24.8w 15VK171 568 C~2nw9 2017 12 16.36856 03 22 26.249 +17 13 19.78 25.2w 15VK171 568 C~2nw9
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 0.17 0.00 -0.13
2 0.0686 -1008.44 0.02 -13.50 0.05
3 0.0742 -1118.52 -0.15 -14.05 -0.08
4 0.1529 -2954.79 0.03 -5.82 0.04
5 0.1530 -2957.87 -0.06 -5.75 0.07
6 0.1531 -2960.60 0.20 -5.75 0.02
7 0.1616 -3177.04 -0.23 -3.14 -0.01
8 0.1803 -3658.03 0.00 3.95 0.06
9 0.1804 -3661.36 -0.01 4.02 0.07
10 0.3035 -6333.05 0.03 90.48 0.02
11 0.3224 -6587.87 0.05 108.74 -0.07
12 0.3992 -6988.41 0.15 190.25 -0.20
13 0.4129 -6945.91 -0.12 205.61 0.02
14 0.9887 4393.44 0.02 375.21 0.06
15 1.0406 3806.53 0.00 364.10 -0.03
16 1.0761 3179.09 0.07 361.09 0.12
17 1.0763 3175.05 0.04 361.00 0.02
18 1.1417 1677.77 -0.06 367.64 -0.10
19 1.1418 1677.37 -0.05 367.70 -0.04
20 1.1469 1548.73 -0.00 369.02 0.01
21 1.1469 1548.31 -0.02 369.04 0.02
22 1.2836 -1683.23 0.06 447.04 0.13
23 1.3085 -2094.45 -0.14 468.90 -0.01
24 1.3739 -2699.87 -0.19 533.54 0.03
25 1.3766 -2708.06 0.08 536.20 -0.03
26 2.0264 8334.49 -0.07 740.70 0.07
27 2.0289 8301.26 -0.05 740.43 0.17
28 2.2611 3097.61 0.21 804.85 -0.28
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.
15VK171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.492 43.505 43.480 ecceobj 0.061 0.063 0.060 incobj 5.116 5.116 5.116 qmin 39.272 39.214 39.341 qmax 47.357 47.432 47.280 amean 43.198 43.210 43.186 amin 42.860 42.866 42.852 amax 43.559 43.577 43.551 emean 0.067 0.069 0.066 emin 0.048 0.050 0.047 emax 0.087 0.089 0.086 imean 3.392 3.397 3.387 imin 2.446 2.448 2.446 imax 4.388 4.392 4.380 excite_mean 0.090 0.091 0.089 fracstop 1.000 1.000 1.000 cjmean 3.082 3.082 3.082 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 179.8 179.8 179.9 kozaiamp 179.9 180.0 180.0