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: 15VZ169 # Created Mon Apr 28 01:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 31 observations of 31 # Arc: 2.08y # First observation: 2015/08/20 # Last observation: 2017/09/16 Preliminary a, adot, b, bdot, g, gdot: -0.000094 0.019402 -0.000004 0.000023 0.021480 0.000000 # Chi-squared of fit: 7.82 DOF: 56 RMS: 0.09 # Min/Max residuals: -0.21 0.24 # Exact a, adot, b, bdot, g, gdot: 1.482832E-05 1.909170E-02 -5.009829E-07 2.264390E-05 2.128443E-02 -1.065229E-03 # Covariance matrix: 2.1705E-13 -4.7852E-14 2.8879E-15 -1.0456E-15 1.5304E-13 2.9463E-12 -4.7852E-14 3.7594E-13 3.1562E-15 -3.8164E-15 1.7845E-13 1.1200E-11 2.8879E-15 3.1562E-15 1.0303E-13 -9.7434E-14 5.0082E-15 1.7508E-13 -1.0456E-15 -3.8164E-15 -9.7434E-14 1.6670E-13 -3.4080E-15 -2.0462E-13 1.5304E-13 1.7845E-13 5.0082E-15 -3.4080E-15 2.7208E-13 9.8692E-12 2.9463E-12 1.1200E-11 1.7508E-13 -2.0462E-13 9.8692E-12 6.0015E-10 # lat0 lon0 xBary yBary zBary JD0 -1.685930 54.173707 1.013237 -0.001414 -0.052517 2457255.056669 # Heliocentric elements and errors Epoch: 2457250.5000 = 2015/08/16 Mean Anomaly: 248.12729 +/- 0.398 Argument of Peri: 31.89252 +/- 0.384 Long of Asc Node: 141.95647 +/- 0.042 Inclination: 1.68400 +/- 0.000 Eccentricity: 0.08897512 +/- 0.0011 Semi-Major Axis: 45.25187313 +/- 0.0082 Time of Perihelion: 2491802.6377 +/- 122.7 Perihelion: 41.22558239 +/- 0.0492 Aphelion: 49.27816388 +/- 0.0495 Period (y) 304.4129 +/- 0.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.33664727 +/- 0.0007 Ecliptic Y 37.52627258 +/- 0.0009 Ecliptic Z -1.38226820 +/- 0.0000 Ecliptic XDOT -0.00207326 +/- 0.0000 Ecliptic YDOT 0.00132010 +/- 0.0000 Ecliptic ZDOT 0.00000700 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 47.04356893 +/- 0.0008 Geocenter to KBO 46.98270419 +/- 0.0012 # Hcoef: 7.75
The following table shows the complete astrometric record for 15VZ169. 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 (15VZ169) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.55588 03 28 56.778 +17 10 49.86 24.6w 15VZ169 568 C~2nw4 2015 09 07.60452 03 28 51.156 +17 09 49.82 24.5w 15VZ169 568 C~2nw4 2015 09 12.45550 03 28 45.018 +17 09 17.26 24.5w 15VZ169 568 C~2nw4 2015 10 07.50351 03 27 44.750 +17 04 54.21 24.3w 15VZ169 568 C~2nw4 2015 10 07.56195 03 27 44.555 +17 04 53.42 24.8w 15VZ169 568 C~2nw4 2015 10 09.54258 03 27 37.989 +17 04 26.71 24.6w 15VZ169 568 C~2nw4 2015 11 06.31779 03 25 46.988 +16 57 15.60 24.2r 15VZ169 568 C~2nw4 2015 11 06.38117 03 25 46.718 +16 57 14.44 24.5r 15VZ169 568 C~2nw4 2015 11 06.45191 03 25 46.387 +16 57 13.27 25.0r 15VZ169 568 C~2nw4 2015 11 06.46851 03 25 46.316 +16 57 13.07 24.2r 15VZ169 568 C~2nw4 2015 11 07.47269 03 25 41.853 +16 56 56.42 24.6w 15VZ169 568 C~2nw4 2015 11 17.45383 03 24 56.942 +16 54 09.80 24.6w 15VZ169 568 C~2nw4 2015 11 17.54213 03 24 56.532 +16 54 08.23 25.0w 15VZ169 568 C~2nw4 2015 12 06.32006 03 23 33.956 +16 49 11.46 24.6w 15VZ169 568 C~2nw4 2015 12 06.45375 03 23 33.379 +16 49 09.23 24.5w 15VZ169 568 C~2nw4 2015 12 31.34139 03 22 03.605 +16 44 06.85 24.6w 15VZ169 568 C~2nw4 2016 01 07.37071 03 21 44.977 +16 43 10.06 24.9w 15VZ169 568 C~2nw4 2016 01 08.23304 03 21 42.984 +16 43 03.97 24.8w 15VZ169 568 C~2nw4 2016 02 05.31732 03 21 10.098 +16 42 01.36 24.6w 15VZ169 568 C~2nw4 2016 02 05.32390 03 21 10.106 +16 42 01.24 25.0w 15VZ169 568 C~2nw4 2016 02 11.27002 03 21 11.981 +16 42 22.22 24.7w 15VZ169 568 C~2nw4 2016 09 27.53124 03 32 42.147 +17 22 56.81 24.6w 15VZ169 568 C~2nw4 2016 10 07.52165 03 32 12.839 +17 20 57.30 24.7w 15VZ169 568 C~2nw4 2016 10 07.61708 03 32 12.517 +17 20 56.22 24.7w 15VZ169 568 C~2nw4 2016 10 09.52198 03 32 06.225 +17 20 31.06 25.1w 15VZ169 568 C~2nw4 2016 10 09.59415 03 32 05.973 +17 20 29.87 25.1w 15VZ169 568 C~2nw4 2016 11 02.47368 03 30 31.927 +17 14 32.50 24.7w 15VZ169 568 C~2nw4 2016 11 04.44969 03 30 23.253 +17 14 00.57 24.6w 15VZ169 568 C~2nw4 2016 12 24.35704 03 26 52.067 +17 01 47.06 15VZ169 568 C~2nw4 2017 01 27.32464 03 25 38.726 +16 58 25.11 24.4w 15VZ169 568 C~2nw4 2017 09 16.62789 03 37 36.991 +17 40 25.65 24.6w 15VZ169 568 C~2nw4
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 -0.13 0.00 0.11
2 0.0494 -92.78 -0.05 -38.59 0.12
3 0.0627 -186.03 0.14 -48.71 -0.07
4 0.1313 -1088.11 -0.00 -92.47 0.07
5 0.1314 -1091.01 -0.01 -92.55 0.05
6 0.1369 -1188.84 0.02 -95.35 0.05
7 0.2129 -2838.29 -0.05 -120.72 -0.02
8 0.2131 -2842.33 0.13 -120.88 -0.18
9 0.2133 -2847.22 -0.03 -120.84 -0.14
10 0.2133 -2848.26 0.04 -120.78 -0.08
11 0.2161 -2914.43 0.06 -121.05 0.02
12 0.2434 -3580.27 0.04 -122.50 -0.00
13 0.2436 -3586.36 -0.05 -122.56 -0.07
14 0.2950 -4808.82 0.05 -114.18 0.10
15 0.2954 -4817.40 -0.12 -114.26 -0.13
16 0.3635 -6142.25 -0.06 -82.96 -0.08
17 0.3828 -6415.77 -0.18 -70.37 0.22
18 0.3852 -6445.04 0.24 -69.03 -0.00
19 0.4620 -6918.47 -0.02 -10.07 0.09
20 0.4621 -6918.39 0.05 -10.21 -0.07
21 0.4783 -6886.98 -0.04 3.27 0.02
22 1.1060 3308.23 -0.00 -73.60 0.03
23 1.1334 2872.14 -0.06 -89.24 -0.01
24 1.1336 2867.41 -0.08 -89.18 0.16
25 1.1389 2773.90 0.10 -92.02 -0.01
26 1.1391 2770.11 0.01 -92.31 -0.21
27 1.2044 1376.61 -0.03 -114.91 -0.03
28 1.2098 1248.31 0.04 -115.85 -0.02
29 1.3465 -1866.46 -0.03 -88.22 0.05
30 1.4395 -2935.93 0.03 -24.00 0.07
31 2.0755 7657.16 0.00 -49.01 -0.02
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.
15VZ169 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.634 45.653 45.615 ecceobj 0.081 0.083 0.078 incobj 1.683 1.683 1.683 qmin 40.679 40.523 40.733 qmax 50.241 50.387 50.082 amean 45.319 45.336 45.300 amin 44.951 44.968 44.928 amax 45.706 45.731 45.689 emean 0.085 0.088 0.083 emin 0.072 0.074 0.070 emax 0.099 0.102 0.097 imean 1.415 1.413 1.417 imin 0.851 0.845 0.857 imax 1.892 1.895 1.890 excite_mean 0.089 0.091 0.087 fracstop 1.000 1.000 1.000 cjmean 3.108 3.108 3.108 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 175.9 175.6 175.6 kozaiamp 180.0 180.0 180.0