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: 15VB168 # Created Tue Apr 1 01:10:39 2025 # Orbit generated from Bernstein formalism # Fitting 37 observations of 37 # Arc: 2.27y # First observation: 2015/09/07 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000023 0.017946 -0.000008 0.001161 0.019439 0.000000 # Chi-squared of fit: 4.10 DOF: 68 RMS: 0.06 # Min/Max residuals: -0.20 0.15 # Exact a, adot, b, bdot, g, gdot: 1.435623E-05 1.761909E-02 5.588431E-07 1.129785E-03 1.923260E-02 -9.901214E-03 # Covariance matrix: 1.5473E-13 -2.1657E-14 2.4487E-16 3.6529E-15 1.0002E-13 1.6588E-12 -2.1657E-14 2.5468E-13 -3.8918E-15 1.9720E-14 1.5679E-13 8.8235E-12 2.4487E-16 -3.8918E-15 9.4552E-14 -6.3560E-14 -1.8990E-15 -1.9456E-13 3.6529E-15 1.9720E-14 -6.3560E-14 7.3328E-14 1.5831E-14 9.5363E-13 1.0002E-13 1.5679E-13 -1.8990E-15 1.5831E-14 2.1592E-13 7.1143E-12 1.6588E-12 8.8235E-12 -1.9456E-13 9.5363E-13 7.1143E-12 4.2653E-10 # lat0 lon0 xBary yBary zBary JD0 -2.224016 52.790781 0.939016 -0.014397 -0.374530 2457273.121609 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 342.08505 +/- 0.078 Argument of Peri: 50.71790 +/- 0.022 Long of Asc Node: 82.71749 +/- 0.006 Inclination: 4.28690 +/- 0.001 Eccentricity: 0.64906642 +/- 0.0013 Semi-Major Axis: 98.94232188 +/- 0.2822 Time of Perihelion: 2475159.4431 +/- 12.7 Perihelion: 34.72218312 +/- 0.1607 Aphelion: 163.16246063 +/- 0.4822 Period (y) 984.1954 +/- 4.21 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 32.38949260 +/- 0.0008 Ecliptic Y 41.10984150 +/- 0.0010 Ecliptic Z -2.01771668 +/- 0.0001 Ecliptic XDOT -0.00284738 +/- 0.0000 Ecliptic YDOT 0.00039359 +/- 0.0000 Ecliptic ZDOT 0.00021546 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 52.37527546 +/- 0.0009 Geocenter to KBO 51.99505292 +/- 0.0013 # Hcoef: 6.65
The following table shows the complete astrometric record for 15VB168. 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 (15VB168) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62082 03 23 54.456 +16 19 02.96 24.0w 15VB168 568 C~2lVl 2015 09 12.48448 03 23 48.532 +16 18 31.93 24.0w 15VB168 568 C~2lVl 2015 10 07.52687 03 22 52.931 +16 14 28.15 24.0w 15VB168 568 C~2lVl 2015 10 07.58621 03 22 52.761 +16 14 27.39 24.1w 15VB168 568 C~2lVl 2015 10 09.56611 03 22 46.777 +16 14 02.99 24.0w 15VB168 568 C~2lVl 2015 11 06.33883 03 21 06.724 +16 07 35.24 23.4r 15VB168 568 C~2lVl 2015 11 06.40946 03 21 06.442 +16 07 34.25 23.7r 15VB168 568 C~2lVl 2015 11 06.47899 03 21 06.160 +16 07 33.14 23.9r 15VB168 568 C~2lVl 2015 11 07.49597 03 21 02.115 +16 07 18.26 23.9w 15VB168 568 C~2lVl 2015 11 17.47779 03 20 21.978 +16 04 51.50 23.9w 15VB168 568 C~2lVl 2015 11 17.56554 03 20 21.603 +16 04 50.21 23.9w 15VB168 568 C~2lVl 2015 12 06.34344 03 19 08.188 +16 00 33.88 24.3w 15VB168 568 C~2lVl 2015 12 06.48092 03 19 07.668 +16 00 32.27 24.0w 15VB168 568 C~2lVl 2015 12 31.36453 03 17 48.576 +15 56 24.25 24.0w 15VB168 568 C~2lVl 2016 01 07.39390 03 17 32.362 +15 55 41.40 23.9w 15VB168 568 C~2lVl 2016 02 05.29346 03 17 03.200 +15 55 21.19 24.2w 15VB168 568 C~2lVl 2016 02 11.24684 03 17 05.318 +15 55 49.48 23.9w 15VB168 568 C~2lVl 2016 09 07.57941 03 27 56.537 +16 37 56.60 24.2w 15VB168 568 C~2lVl 2016 09 27.51468 03 27 21.884 +16 35 18.96 23.7w 15VB168 568 C~2lVl 2016 09 27.51883 03 27 21.878 +16 35 18.89 23.9w 15VB168 568 C~2lVl 2016 09 29.49059 03 27 17.008 +16 34 58.61 24.1w 15VB168 568 C~2lVl 2016 10 05.49370 03 27 00.769 +16 33 52.08 24.4w 15VB168 568 C~2lVl 2016 10 07.49825 03 26 54.887 +16 33 28.70 24.1w 15VB168 568 C~2lVl 2016 10 07.59395 03 26 54.590 +16 33 27.49 24.1w 15VB168 568 C~2lVl 2016 10 09.49835 03 26 48.803 +16 33 04.47 24.0w 15VB168 568 C~2lVl 2016 10 09.57103 03 26 48.578 +16 33 03.60 24.1w 15VB168 568 C~2lVl 2016 11 02.48525 03 25 22.907 +16 27 38.47 24.1w 15VB168 568 C~2lVl 2016 11 04.46126 03 25 15.063 +16 27 09.76 23.8w 15VB168 568 C~2lVl 2016 12 28.45409 03 21 54.419 +16 16 00.08 24.0w 15VB168 568 C~2lVl 2017 01 27.30287 03 21 02.640 +16 14 13.78 24.4w 15VB168 568 C~2lVl 2017 01 27.30860 03 21 02.630 +16 14 13.79 24.3w 15VB168 568 C~2lVl 2017 09 15.58250 03 31 55.226 +16 56 11.42 15VB168 568 C~2lVl 2017 09 22.56874 03 31 42.769 +16 55 16.60 24.0w 15VB168 568 C~2lVl 2017 12 13.38599 03 26 50.046 +16 37 54.16 23.8w 15VB168 568 C~2lVl 2017 12 13.39528 03 26 50.022 +16 37 53.94 23.9w 15VB168 568 C~2lVl 2017 12 13.42326 03 26 49.913 +16 37 53.55 23.7w 15VB168 568 C~2lVl 2017 12 13.43255 03 26 49.879 +16 37 53.55 23.9w 15VB168 568 C~2lVl
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 0.03 0.00 0.08
2 0.0133 -90.34 0.04 -8.66 -0.05
3 0.0819 -926.51 0.01 -43.42 0.07
4 0.0820 -929.07 0.14 -43.54 -0.00
5 0.0875 -1018.62 -0.01 -45.44 0.03
6 0.1635 -2511.29 -0.07 -55.98 -0.04
7 0.1637 -2515.47 -0.02 -55.90 -0.01
8 0.1639 -2519.68 -0.05 -55.95 -0.09
9 0.1667 -2579.85 0.04 -55.53 0.05
10 0.1940 -3176.71 0.09 -50.30 0.00
11 0.1942 -3182.27 -0.14 -50.17 0.06
12 0.2456 -4271.31 -0.02 -27.54 0.01
13 0.2460 -4278.98 -0.01 -27.18 0.13
14 0.3142 -5445.63 -0.07 26.30 0.10
15 0.3334 -5682.80 -0.03 45.24 -0.03
16 0.4125 -6094.72 0.06 134.44 -0.04
17 0.4288 -6057.86 0.07 153.87 -0.00
18 1.0019 3654.92 0.00 233.80 -0.02
19 1.0565 3133.20 -0.05 203.61 -0.00
20 1.0565 3133.10 0.00 203.57 -0.05
21 1.0619 3060.23 -0.04 201.17 0.00
22 1.0784 2817.52 0.06 194.31 -0.20
23 1.0839 2729.78 0.05 192.54 -0.01
24 1.0841 2725.34 -0.03 192.42 -0.06
25 1.0893 2639.01 -0.09 190.68 -0.05
26 1.0895 2635.66 -0.02 190.64 -0.05
27 1.1550 1361.29 0.02 181.26 0.01
28 1.1604 1244.85 0.03 181.55 -0.02
29 1.3082 -1718.65 -0.06 258.24 0.00
30 1.3900 -2466.97 0.07 344.46 -0.01
31 1.3900 -2467.10 -0.02 344.51 0.02
32 2.0232 7248.72 -0.00 461.59 0.06
33 2.0423 7061.79 0.00 451.47 -0.04
34 2.2663 2727.94 -0.03 466.99 0.15
35 2.2663 2727.56 0.09 466.86 0.01
36 2.2664 2725.94 -0.02 466.87 -0.04
37 2.2664 2725.47 0.00 466.99 0.06
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.
15VB168 quality flag:2 Type: SCATNEAR 6:1EEEEE SCATNEAR axisobj 100.018 100.830 99.223 ecceobj 0.649 0.653 0.645 incobj 4.280 4.280 4.280 qmin 33.736 33.850 33.927 qmax 167.255 170.392 167.619 amean 93.883 99.420 94.169 amin 84.483 97.431 87.917 amax 100.993 102.570 101.262 emean 0.629 0.650 0.629 emin 0.590 0.641 0.599 emax 0.656 0.661 0.655 imean 3.063 3.004 3.256 imin 2.391 2.910 2.760 imax 3.507 3.063 3.765 excite_mean 0.632 0.652 0.632 fracstop 1.000 1.000 1.000 cjmean 3.059 3.061 3.064 libcent 0 -180.0 77.8 -180.0 libamp 0 -180.0 40.4 -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 159.6 64.7 175.9 kozaiamp 180.0 16.9 179.9