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: 15VW171 # Created Tue Apr 1 01:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 36 observations of 36 # Arc: 3.08y # First observation: 2014/11/17 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: 0.000068 0.022399 -0.000001 -0.000120 0.023485 0.000000 # Chi-squared of fit: 6.61 DOF: 66 RMS: 0.08 # Min/Max residuals: -0.26 0.22 # Exact a, adot, b, bdot, g, gdot: 1.549998E-05 2.255539E-02 1.931354E-07 -1.198276E-04 2.362534E-02 6.539096E-05 # Covariance matrix: 3.0083E-13 -3.4261E-13 -4.3466E-17 8.3051E-16 -1.4346E-13 -3.5240E-12 -3.4261E-13 5.3357E-13 6.6679E-17 -1.5090E-15 2.6188E-13 6.3409E-12 -4.3466E-17 6.6679E-17 1.5053E-13 -7.2504E-14 -4.0087E-16 1.2897E-16 8.3051E-16 -1.5090E-15 -7.2504E-14 4.8080E-14 -1.4318E-15 -2.0758E-14 -1.4346E-13 2.6188E-13 -4.0087E-16 -1.4318E-15 2.9437E-13 3.6804E-12 -3.5240E-12 6.3409E-12 1.2897E-16 -2.0758E-14 3.6804E-12 8.3259E-11 # lat0 lon0 xBary yBary zBary JD0 -2.385734 48.703078 -0.101874 -0.040810 -0.983347 2456978.926868 # Heliocentric elements and errors Epoch: 2456970.5000 = 2014/11/09 Mean Anomaly: 90.75431 +/- 1.154 Argument of Peri: 171.50570 +/- 1.146 Long of Asc Node: 146.23651 +/- 0.014 Inclination: 2.35113 +/- 0.000 Eccentricity: 0.00281829 +/- 0.0004 Semi-Major Axis: 43.30797872 +/- 0.0030 Time of Perihelion: 2430727.4037 +/- 333.8 Perihelion: 43.18592434 +/- 0.0177 Aphelion: 43.43003309 +/- 0.0177 Period (y) 285.0100 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.48010338 +/- 0.0006 Ecliptic Y 32.58119874 +/- 0.0007 Ecliptic Z -1.76197772 +/- 0.0000 Ecliptic XDOT -0.00196345 +/- 0.0000 Ecliptic YDOT 0.00172533 +/- 0.0000 Ecliptic ZDOT -0.00001409 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.30999152 +/- 0.0007 Geocenter to KBO 42.32744153 +/- 0.0010 # Hcoef: 8.28
The following table shows the complete astrometric record for 15VW171. 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 (15VW171) followed by the observatory code and reference code for the source of the astrometry.
2014 11 17.42609 03 07 42.091 +15 05 37.43 24.5r 15VW171 568 C~2nwB 2014 11 17.54029 03 07 41.542 +15 05 35.34 24.3r 15VW171 568 C~2nwB 2014 11 19.33914 03 07 33.021 +15 05 01.27 24.6r 15VW171 568 C~2nwB 2014 11 23.44182 03 07 13.736 +15 03 44.56 24.7r 15VW171 568 C~2nwB 2015 10 07.42821 03 15 55.095 +15 38 47.36 24.8w 15VW171 568 C~2nwB 2015 10 08.44001 03 15 51.410 +15 38 30.75 25.4w 15VW171 568 C~2nwB 2015 10 08.49908 03 15 51.173 +15 38 29.72 15VW171 568 C~2nwB 2015 11 07.34843 03 13 41.508 +15 29 21.06 24.5r 15VW171 568 C~2nwB 2015 11 07.39058 03 13 41.302 +15 29 20.32 24.5r 15VW171 568 C~2nwB 2015 11 07.43274 03 13 41.091 +15 29 19.53 24.4r 15VW171 568 C~2nwB 2015 11 10.51713 03 13 26.346 +15 28 20.39 24.9w 15VW171 568 C~2nwB 2015 11 10.54648 03 13 26.184 +15 28 19.72 24.9w 15VW171 568 C~2nwB 2015 11 17.36382 03 12 53.486 +15 26 10.06 24.7w 15VW171 568 C~2nwB 2015 11 17.41043 03 12 53.270 +15 26 09.21 24.9w 15VW171 568 C~2nwB 2015 12 06.37266 03 11 25.865 +15 20 36.79 24.9w 15VW171 568 C~2nwB 2015 12 13.30706 03 10 56.929 +15 18 52.12 24.8w 15VW171 568 C~2nwB 2015 12 13.36559 03 10 56.688 +15 18 51.34 24.8w 15VW171 568 C~2nwB 2016 01 01.36029 03 09 51.785 +15 15 13.89 24.6w 15VW171 568 C~2nwB 2016 01 07.30705 03 09 36.795 +15 14 30.22 24.6w 15VW171 568 C~2nwB 2016 02 04.34036 03 09 08.205 +15 14 06.13 24.7w 15VW171 568 C~2nwB 2016 02 11.22942 03 09 12.523 +15 14 47.60 25.0w 15VW171 568 C~2nwB 2016 09 07.56785 03 22 17.485 +16 04 20.25 25.2w 15VW171 568 C~2nwB 2016 09 27.50655 03 21 34.659 +16 00 39.40 25.1w 15VW171 568 C~2nwB 2016 10 10.44325 03 20 50.990 +15 57 23.46 24.9w 15VW171 568 C~2nwB 2016 10 10.50202 03 20 50.756 +15 57 22.54 25.2w 15VW171 568 C~2nwB 2016 10 10.51973 03 20 50.698 +15 57 22.23 24.8w 15VW171 568 C~2nwB 2016 11 02.51417 03 19 11.517 +15 50 31.56 24.8w 15VW171 568 C~2nwB 2017 01 26.34976 03 14 13.325 +15 33 37.34 24.1w 15VW171 568 C~2nwB 2017 09 15.57624 03 27 13.184 +16 22 02.00 24.7w 15VW171 568 C~2nwB 2017 09 16.63393 03 27 11.153 +16 21 51.31 25.0w 15VW171 568 C~2nwB 2017 09 17.59434 03 27 09.230 +16 21 41.44 24.9w 15VW171 568 C~2nwB 2017 09 21.62152 03 27 00.299 +16 20 56.90 24.7w 15VW171 568 C~2nwB 2017 09 23.57295 03 26 55.515 +16 20 33.77 24.8w 15VW171 568 C~2nwB 2017 12 16.35462 03 21 01.508 +15 57 43.95 25.0w 15VW171 568 C~2nwB 2017 12 16.35926 03 21 01.492 +15 57 44.19 25.2w 15VW171 568 C~2nwB 2017 12 16.37785 03 21 01.415 +15 57 43.88 24.9w 15VW171 568 C~2nwB
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 -0.08 0.00 -0.06
2 0.0003 -8.22 -0.02 0.15 0.04
3 0.0052 -136.24 -0.02 0.93 0.12
4 0.0165 -425.90 0.10 3.16 -0.12
5 0.8871 7406.14 -0.05 11.15 -0.02
6 0.8898 7350.35 0.08 9.11 -0.05
7 0.8900 7346.77 -0.15 9.01 -0.06
8 0.9717 5392.88 0.06 -25.48 -0.07
9 0.9718 5389.81 0.05 -25.40 -0.00
10 0.9720 5386.65 -0.03 -25.36 0.04
11 0.9804 5165.31 0.22 -25.80 0.13
12 0.9805 5162.87 -0.07 -25.83 0.11
13 0.9991 4672.39 -0.07 -25.14 -0.01
14 0.9993 4669.16 0.09 -25.13 -0.03
15 1.0512 3361.73 -0.06 -8.01 -0.00
16 1.0702 2930.29 -0.05 3.36 0.00
17 1.0703 2926.72 -0.06 3.54 0.06
18 1.1223 1963.59 0.08 46.65 0.04
19 1.1386 1742.90 0.05 63.10 0.00
20 1.2154 1337.97 0.01 151.65 -0.20
21 1.2342 1409.35 -0.09 174.69 -0.03
22 1.8074 13146.96 0.03 62.27 0.08
23 1.8620 12491.10 -0.08 6.60 0.02
24 1.8974 11829.91 0.02 -21.20 -0.03
25 1.8975 11826.40 -0.06 -21.23 0.03
26 1.8976 11825.51 0.08 -21.31 -0.03
27 1.9605 10332.89 0.04 -48.89 0.03
28 2.1928 5904.57 -0.01 99.85 -0.03
29 2.8286 17560.46 -0.08 14.11 0.06
30 2.8315 17529.26 0.02 11.04 0.01
31 2.8341 17499.79 0.07 8.39 0.08
32 2.8452 17363.22 -0.05 -2.68 0.09
33 2.8505 17290.26 0.06 -7.88 0.05
34 3.0799 11982.27 -0.07 -40.42 -0.26
35 3.0799 11982.11 0.04 -40.13 0.03
36 3.0800 11980.95 0.01 -40.14 -0.03
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.
15VW171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.630 43.639 43.621 ecceobj 0.010 0.010 0.010 incobj 2.349 2.349 2.349 qmin 42.015 42.008 42.017 qmax 44.770 44.783 44.737 amean 43.308 43.317 43.299 amin 42.978 42.988 42.966 amax 43.642 43.652 43.635 emean 0.012 0.013 0.012 emin 0.000 0.000 0.000 emax 0.026 0.026 0.026 imean 2.343 2.339 2.347 imin 1.460 1.460 1.459 imax 3.035 3.029 3.040 excite_mean 0.043 0.043 0.043 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 178.3 177.8 179.4 kozaiamp 180.0 180.0 180.0