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: 15VC171 # Created Tue Apr 1 01:10:41 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 0.022779 -0.000003 0.001375 0.023408 0.000000 # Chi-squared of fit: 6.39 DOF: 50 RMS: 0.08 # Min/Max residuals: -0.22 0.15 # Exact a, adot, b, bdot, g, gdot: 1.493545E-05 2.264543E-02 1.092132E-06 1.365710E-03 2.340586E-02 -5.940754E-04 # Covariance matrix: 2.2952E-13 7.4017E-16 -1.1903E-15 7.7675E-15 1.6896E-13 2.9901E-12 7.4017E-16 3.2354E-13 -4.9983E-15 2.3637E-14 2.2282E-13 8.9294E-12 -1.1903E-15 -4.9983E-15 1.2281E-13 -8.9150E-14 -4.2469E-15 -2.1967E-13 7.7675E-15 2.3637E-14 -8.9150E-14 1.1346E-13 2.2410E-14 1.0155E-12 1.6896E-13 2.2282E-13 -4.2469E-15 2.2410E-14 3.1539E-13 8.5265E-12 2.9901E-12 8.9294E-12 -2.1967E-13 1.0155E-12 8.5265E-12 3.8300E-10 # lat0 lon0 xBary yBary zBary JD0 -1.077537 51.487936 0.893505 -0.008710 -0.470733 2457277.997529 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 301.58144 +/- 0.326 Argument of Peri: 46.80662 +/- 0.418 Long of Asc Node: 67.52358 +/- 0.004 Inclination: 3.59566 +/- 0.001 Eccentricity: 0.05598204 +/- 0.0008 Semi-Major Axis: 44.39874029 +/- 0.0048 Time of Perihelion: 2474805.3794 +/- 97.9 Perihelion: 41.91320820 +/- 0.0352 Aphelion: 46.88427237 +/- 0.0353 Period (y) 295.8450 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.58709214 +/- 0.0006 Ecliptic Y 33.23667005 +/- 0.0008 Ecliptic Z -0.80339220 +/- 0.0000 Ecliptic XDOT -0.00211593 +/- 0.0000 Ecliptic YDOT 0.00159097 +/- 0.0000 Ecliptic ZDOT 0.00016108 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.20149682 +/- 0.0007 Geocenter to KBO 42.72433849 +/- 0.0010 # Hcoef: 8.41
The following table shows the complete astrometric record for 15VC171. 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 (15VC171) followed by the observatory code and reference code for the source of the astrometry.
2015 09 12.49674 03 17 25.683 +17 05 38.95 25.6w 15VC171 568 C~2nw8 2015 10 07.54436 03 16 16.137 +17 01 00.44 24.8w 15VC171 568 C~2nw8 2015 10 07.60373 03 16 15.920 +17 00 59.56 24.8w 15VC171 568 C~2nw8 2015 10 09.58362 03 16 08.548 +17 00 30.70 25.1w 15VC171 568 C~2nw8 2015 11 07.33788 03 14 01.697 +16 52 23.34 24.7r 15VC171 568 C~2nw8 2015 11 07.38006 03 14 01.493 +16 52 22.57 24.6r 15VC171 568 C~2nw8 2015 11 07.42224 03 14 01.282 +16 52 21.81 24.5r 15VC171 568 C~2nw8 2015 11 17.35218 03 13 13.164 +16 49 20.54 24.9w 15VC171 568 C~2nw8 2015 11 17.39878 03 13 12.934 +16 49 19.62 25.4w 15VC171 568 C~2nw8 2015 12 06.36096 03 11 44.530 +16 43 52.96 24.8w 15VC171 568 C~2nw8 2016 01 01.34872 03 10 09.235 +16 38 18.97 24.9w 15VC171 568 C~2nw8 2016 01 08.25624 03 09 51.844 +16 37 23.53 25.0w 15VC171 568 C~2nw8 2016 02 05.28768 03 09 25.114 +16 36 40.33 24.9w 15VC171 568 C~2nw8 2016 02 10.30807 03 09 28.237 +16 37 04.62 25.2w 15VC171 568 C~2nw8 2016 09 07.62568 03 22 41.922 +17 30 31.28 15VC171 568 C~2nw8 2016 09 26.58416 03 22 01.504 +17 27 51.82 25.1w 15VC171 568 C~2nw8 2016 10 09.54522 03 21 18.093 +17 25 06.59 25.0w 15VC171 568 C~2nw8 2016 10 09.61729 03 21 17.818 +17 25 05.36 24.8w 15VC171 568 C~2nw8 2016 11 02.52573 03 19 34.023 +17 18 38.72 24.3w 15VC171 568 C~2nw8 2016 11 04.40084 03 19 25.086 +17 18 05.85 25.1w 15VC171 568 C~2nw8 2016 12 24.31334 03 15 41.541 +17 04 48.05 15VC171 568 C~2nw8 2017 01 02.41556 03 15 13.203 +17 03 15.18 25.5w 15VC171 568 C~2nw8 2017 01 26.32220 03 14 31.753 +17 01 23.78 25.0w 15VC171 568 C~2nw8 2017 01 26.32908 03 14 31.759 +17 01 23.88 24.9w 15VC171 568 C~2nw8 2017 01 27.28684 03 14 31.198 +17 01 23.78 25.1w 15VC171 568 C~2nw8 2017 09 15.58856 03 27 41.097 +17 53 39.65 24.9w 15VC171 568 C~2nw8 2017 12 16.34929 03 21 24.580 +17 31 19.24 25.1w 15VC171 568 C~2nw8 2017 12 16.36856 03 21 24.493 +17 31 19.02 24.8w 15VC171 568 C~2nw8
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 0.07 0.00 -0.03
2 0.0686 -1035.43 -0.07 -9.79 0.08
3 0.0687 -1038.67 -0.00 -9.83 0.04
4 0.0742 -1148.28 -0.03 -10.13 0.02
5 0.1529 -3032.79 0.06 -3.53 0.08
6 0.1530 -3035.81 0.09 -3.50 0.06
7 0.1531 -3038.94 0.04 -3.44 0.09
8 0.1803 -3753.27 -0.02 3.96 0.07
9 0.1804 -3756.70 -0.05 3.95 -0.00
10 0.2323 -5068.09 -0.09 25.70 0.09
11 0.3035 -6477.91 -0.01 69.53 0.01
12 0.3224 -6733.83 -0.05 83.17 -0.20
13 0.3992 -7115.95 0.09 144.81 -0.02
14 0.4129 -7066.13 0.02 156.14 -0.06
15 0.9887 4760.85 0.15 284.01 0.03
16 1.0406 4160.79 -0.09 275.99 -0.03
17 1.0761 3517.74 0.01 273.85 -0.02
18 1.0763 3513.62 -0.00 273.66 -0.22
19 1.1418 1977.91 -0.14 279.32 -0.06
20 1.1469 1845.76 0.04 280.39 0.03
21 1.2835 -1455.01 0.15 339.40 -0.05
22 1.3085 -1871.53 0.02 356.06 0.03
23 1.3739 -2474.47 -0.21 404.49 -0.11
24 1.3739 -2474.36 -0.03 404.56 -0.06
25 1.3766 -2482.15 -0.03 406.58 -0.08
26 2.0098 9252.51 -0.12 562.92 0.11
27 2.2611 3702.31 0.13 610.72 0.06
28 2.2611 3701.05 0.04 610.82 0.13
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.
15VC171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.823 44.833 44.813 ecceobj 0.057 0.058 0.056 incobj 3.587 3.587 3.586 qmin 40.976 40.959 41.013 qmax 48.203 48.246 48.163 amean 44.480 44.490 44.470 amin 44.134 44.138 44.123 amax 44.842 44.859 44.843 emean 0.060 0.061 0.059 emin 0.045 0.045 0.044 emax 0.075 0.076 0.075 imean 2.207 2.209 2.204 imin 1.543 1.544 1.541 imax 2.782 2.784 2.779 excite_mean 0.071 0.072 0.071 fracstop 1.000 1.000 1.000 cjmean 3.101 3.101 3.101 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 175.5 175.6 175.7 kozaiamp 180.0 180.0 179.9