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: 15VR170 # Created Tue Apr 1 01:10:41 2025 # Orbit generated from Bernstein formalism # Fitting 39 observations of 39 # Arc: 2.27y # First observation: 2015/09/07 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000091 0.022091 0.000000 0.000621 0.023205 0.000000 # Chi-squared of fit: 7.32 DOF: 72 RMS: 0.08 # Min/Max residuals: -0.23 0.22 # Exact a, adot, b, bdot, g, gdot: 1.490155E-05 2.194354E-02 5.469583E-07 6.180266E-04 2.316622E-02 1.320462E-03 # Covariance matrix: 1.8563E-13 -3.2608E-14 -5.4279E-16 2.3107E-15 1.2463E-13 2.0376E-12 -3.2608E-14 2.2761E-13 -1.6569E-15 6.6924E-15 1.2987E-13 5.8553E-12 -5.4279E-16 -1.6569E-15 9.9779E-14 -7.8629E-14 -1.6143E-15 -7.5201E-14 2.3107E-15 6.6924E-15 -7.8629E-14 9.8892E-14 6.6539E-15 3.0366E-13 1.2463E-13 1.2987E-13 -1.6143E-15 6.6539E-15 2.1910E-13 5.8396E-12 2.0376E-12 5.8553E-12 -7.5201E-14 3.0366E-13 5.8396E-12 2.6567E-10 # lat0 lon0 xBary yBary zBary JD0 -0.073666 51.771464 0.932142 -0.000355 -0.391580 2457273.129809 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 99.80349 +/- 0.316 Argument of Peri: 253.43027 +/- 0.308 Long of Asc Node: 53.13891 +/- 0.001 Inclination: 1.61426 +/- 0.001 Eccentricity: 0.03722615 +/- 0.0007 Semi-Major Axis: 43.23322545 +/- 0.0035 Time of Perihelion: 2428485.3762 +/- 91.2 Perihelion: 41.62381891 +/- 0.0308 Aphelion: 44.84263199 +/- 0.0308 Period (y) 284.2724 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.68174785 +/- 0.0005 Ecliptic Y 33.63977107 +/- 0.0007 Ecliptic Z -0.05546799 +/- 0.0000 Ecliptic XDOT -0.00194244 +/- 0.0000 Ecliptic YDOT 0.00172101 +/- 0.0000 Ecliptic ZDOT 0.00007289 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.56508279 +/- 0.0006 Geocenter to KBO 43.16630464 +/- 0.0009 # Hcoef: 8.47
The following table shows the complete astrometric record for 15VR170. 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 (15VR170) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62902 03 17 29.148 +18 08 13.92 25.1w 15VR170 568 C~2nw6 2015 09 12.49264 03 17 21.441 +18 07 45.71 25.3w 15VR170 568 C~2nw6 2015 10 07.53854 03 16 11.845 +18 03 25.76 25.3w 15VR170 568 C~2nw6 2015 10 07.59790 03 16 11.624 +18 03 25.03 24.8w 15VR170 568 C~2nw6 2015 10 09.57780 03 16 04.247 +18 02 57.17 25.2w 15VR170 568 C~2nw6 2015 11 07.33264 03 13 57.508 +17 54 55.28 24.9r 15VR170 568 C~2nw6 2015 11 07.37479 03 13 57.297 +17 54 54.57 24.8r 15VR170 568 C~2nw6 2015 11 07.41697 03 13 57.085 +17 54 53.67 24.8r 15VR170 568 C~2nw6 2015 11 10.49950 03 13 42.187 +17 53 56.75 25.1w 15VR170 568 C~2nw6 2015 11 17.34635 03 13 09.038 +17 51 49.42 25.0w 15VR170 568 C~2nw6 2015 11 17.39294 03 13 08.814 +17 51 48.53 24.9w 15VR170 568 C~2nw6 2015 12 06.35508 03 11 40.542 +17 46 08.68 24.9w 15VR170 568 C~2nw6 2015 12 06.49265 03 11 39.911 +17 46 06.34 25.2w 15VR170 568 C~2nw6 2016 01 01.34294 03 10 05.364 +17 40 01.96 25.1w 15VR170 568 C~2nw6 2016 01 07.40549 03 09 49.892 +17 39 03.06 25.6w 15VR170 568 C~2nw6 2016 01 08.25043 03 09 47.991 +17 38 55.63 25.2w 15VR170 568 C~2nw6 2016 02 05.28189 03 09 21.153 +17 37 20.88 25.3w 15VR170 568 C~2nw6 2016 02 10.30227 03 09 24.227 +17 37 35.47 25.4w 15VR170 568 C~2nw6 2016 09 07.57363 03 22 32.440 +18 29 28.25 15VR170 568 C~2nw6 2016 09 27.51061 03 21 49.176 +18 26 53.58 25.1w 15VR170 568 C~2nw6 2016 09 29.48481 03 21 43.196 +18 26 32.16 24.7w 15VR170 568 C~2nw6 2016 10 05.48792 03 21 23.281 +18 25 19.67 26.1w 15VR170 568 C~2nw6 2016 10 07.49247 03 21 16.102 +18 24 53.52 24.6w 15VR170 568 C~2nw6 2016 10 07.58817 03 21 15.743 +18 24 52.24 25.2w 15VR170 568 C~2nw6 2016 10 09.49252 03 21 08.699 +18 24 26.55 25.0w 15VR170 568 C~2nw6 2016 10 09.56525 03 21 08.423 +18 24 25.45 25.0w 15VR170 568 C~2nw6 2016 11 02.53154 03 19 24.634 +18 18 03.58 25.2w 15VR170 568 C~2nw6 2016 11 02.53733 03 19 24.602 +18 18 03.48 25.0w 15VR170 568 C~2nw6 2016 11 04.40663 03 19 15.720 +18 17 30.52 24.7w 15VR170 568 C~2nw6 2016 11 04.41248 03 19 15.692 +18 17 30.44 24.8w 15VR170 568 C~2nw6 2016 12 24.30698 03 15 32.961 +18 03 37.63 25.3w 15VR170 568 C~2nw6 2016 12 24.32550 03 15 32.886 +18 03 37.42 24.9w 15VR170 568 C~2nw6 2017 01 02.40920 03 15 04.706 +18 01 51.89 25.0w 15VR170 568 C~2nw6 2017 01 02.42780 03 15 04.650 +18 01 51.78 25.8w 15VR170 568 C~2nw6 2017 01 26.34230 03 14 23.313 +17 59 20.57 23.6w 15VR170 568 C~2nw6 2017 01 27.27995 03 14 22.770 +17 59 18.95 25.3w 15VR170 568 C~2nw6 2017 09 15.58856 03 27 24.889 +18 49 30.62 25.0w 15VR170 568 C~2nw6 2017 09 22.57478 03 27 09.559 +18 48 37.86 25.3w 15VR170 568 C~2nw6 2017 12 13.42791 03 21 21.771 +18 27 51.54 24.6w 15VR170 568 C~2nw6
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 0.02 0.00 -0.03
2 0.0133 -113.42 -0.10 1.22 -0.02
3 0.0819 -1139.21 0.02 8.15 -0.04
4 0.0821 -1142.45 0.07 8.27 0.05
5 0.0875 -1251.28 -0.05 8.81 0.01
6 0.1662 -3122.81 0.17 17.97 0.03
7 0.1663 -3125.91 0.11 18.08 0.11
8 0.1664 -3129.06 0.00 18.01 0.00
9 0.1749 -3349.24 -0.09 19.20 0.09
10 0.1936 -3839.43 0.00 21.47 -0.04
11 0.1937 -3842.75 0.06 21.46 -0.08
12 0.2457 -5148.95 0.04 28.64 -0.04
13 0.2460 -5158.26 -0.23 28.78 0.04
14 0.3168 -6558.57 -0.02 39.18 -0.06
15 0.3334 -6787.65 0.07 41.88 0.07
16 0.3357 -6815.85 0.07 42.03 -0.11
17 0.4125 -7211.30 -0.02 54.08 -0.07
18 0.4262 -7164.99 -0.12 56.29 -0.00
19 1.0019 4501.91 -0.08 127.74 0.15
20 1.0565 3867.00 0.00 133.70 -0.02
21 1.0619 3779.23 0.22 134.53 0.20
22 1.0783 3486.62 -0.00 136.29 0.02
23 1.0838 3381.13 -0.05 136.94 0.02
24 1.0841 3375.86 -0.09 137.00 0.02
25 1.0893 3272.35 -0.01 137.63 0.05
26 1.0895 3268.27 0.02 137.56 -0.06
27 1.1551 1741.87 -0.08 145.63 -0.04
28 1.1551 1741.41 -0.13 145.65 -0.02
29 1.1602 1610.68 0.05 146.25 -0.04
30 1.1603 1610.28 0.06 146.27 -0.02
31 1.2969 -1671.43 0.17 164.41 -0.08
32 1.2969 -1672.51 0.04 164.49 -0.02
33 1.3218 -2088.07 -0.04 167.89 -0.06
34 1.3218 -2088.87 -0.07 167.99 0.04
35 1.3873 -2697.63 -0.08 176.95 -0.09
36 1.3899 -2705.54 0.07 177.42 0.03
37 2.0232 8831.25 0.04 257.36 0.05
38 2.0423 8606.90 -0.04 259.74 -0.03
39 2.2664 3504.40 0.02 288.66 -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.
15VR170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.655 43.668 43.643 ecceobj 0.041 0.043 0.040 incobj 1.609 1.608 1.609 qmin 40.858 40.785 40.958 qmax 45.915 46.023 45.935 amean 43.332 43.345 43.320 amin 42.998 43.017 42.986 amax 43.672 43.686 43.669 emean 0.036 0.037 0.034 emin 0.016 0.018 0.014 emax 0.052 0.054 0.052 imean 1.052 1.051 1.054 imin 0.020 0.000 0.020 imax 1.714 1.713 1.715 excite_mean 0.041 0.042 0.039 fracstop 1.000 1.000 1.000 cjmean 3.091 3.091 3.091 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 212.5 212.2 212.4 kozaiamp 179.9 180.0 179.9