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: 15VF173 # Created Tue Apr 1 01:10:43 2025 # Orbit generated from Bernstein formalism # Fitting 32 observations of 32 # Arc: 2.35y # First observation: 2015/08/11 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000091 0.019687 -0.000004 0.000618 0.021901 0.000000 # Chi-squared of fit: 7.78 DOF: 58 RMS: 0.09 # Min/Max residuals: -0.21 0.19 # Exact a, adot, b, bdot, g, gdot: 1.380372E-05 1.934195E-02 -7.266531E-08 6.066605E-04 2.163092E-02 7.614887E-05 # Covariance matrix: 2.1459E-13 2.1589E-14 1.9238E-15 4.7719E-15 1.9512E-13 6.6857E-12 2.1589E-14 3.6896E-13 5.4931E-16 1.2529E-14 2.8245E-13 1.7564E-11 1.9238E-15 5.4931E-16 1.0011E-13 -8.8335E-14 2.2767E-15 -4.9367E-15 4.7719E-15 1.2529E-14 -8.8335E-14 1.4085E-13 1.4264E-14 9.9700E-13 1.9512E-13 2.8245E-13 2.2767E-15 1.4264E-14 4.0589E-13 1.9993E-11 6.6857E-12 1.7564E-11 -4.9367E-15 9.9700E-13 1.9993E-11 1.3978E-09 # lat0 lon0 xBary yBary zBary JD0 -1.461257 51.173163 1.014820 0.001312 0.046567 2457246.093519 # Heliocentric elements and errors Epoch: 2457240.5000 = 2015/08/06 Mean Anomaly: 198.54177 +/- 1.436 Argument of Peri: 124.07958 +/- 1.438 Long of Asc Node: 89.56315 +/- 0.017 Inclination: 2.29136 +/- 0.001 Eccentricity: 0.06845787 +/- 0.0006 Semi-Major Axis: 43.35942981 +/- 0.0032 Time of Perihelion: 2504012.0172 +/- 416.0 Perihelion: 40.39113557 +/- 0.0245 Aphelion: 46.32772406 +/- 0.0245 Period (y) 285.5180 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 29.73278233 +/- 0.0009 Ecliptic Y 35.33099294 +/- 0.0011 Ecliptic Z -1.17888573 +/- 0.0000 Ecliptic XDOT -0.00190200 +/- 0.0000 Ecliptic YDOT 0.00153759 +/- 0.0000 Ecliptic ZDOT 0.00007657 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.19206835 +/- 0.0010 Geocenter to KBO 46.23012466 +/- 0.0014 # Hcoef: 8.22
The following table shows the complete astrometric record for 15VF173. 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 (15VF173) followed by the observatory code and reference code for the source of the astrometry.
2015 08 11.59273 03 16 34.462 +16 38 30.73 25.4w 15VF173 568 C~2nwG 2015 09 06.62350 03 16 30.295 +16 37 32.58 22.9w 15VF173 568 C~2nwG 2015 09 12.51312 03 16 21.430 +16 36 49.32 24.8w 15VF173 568 C~2nwG 2015 10 07.43992 03 15 15.259 +16 32 02.41 26.4w 15VF173 568 C~2nwG 2015 10 07.44703 03 15 15.226 +16 32 02.21 25.5w 15VF173 568 C~2nwG 2015 10 08.45165 03 15 11.707 +16 31 47.67 25.1w 15VF173 568 C~2nwG 2015 10 08.51072 03 15 11.479 +16 31 46.67 25.2w 15VF173 568 C~2nwG 2015 11 07.35903 03 13 07.664 +16 23 29.36 25.3r 15VF173 568 C~2nwG 2015 11 07.40112 03 13 07.477 +16 23 28.71 24.7r 15VF173 568 C~2nwG 2015 11 07.44330 03 13 07.275 +16 23 28.06 24.9r 15VF173 568 C~2nwG 2015 11 10.52886 03 12 53.196 +16 22 32.98 25.2w 15VF173 568 C~2nwG 2015 11 17.37547 03 12 21.922 +16 20 31.95 24.9w 15VF173 568 C~2nwG 2015 11 17.42215 03 12 21.701 +16 20 31.10 25.0w 15VF173 568 C~2nwG 2015 12 06.36680 03 10 58.534 +16 15 16.77 24.8w 15VF173 568 C~2nwG 2015 12 06.51621 03 10 57.921 +16 15 14.34 24.6w 15VF173 568 C~2nwG 2015 12 13.30120 03 10 30.948 +16 13 35.67 24.8w 15VF173 568 C~2nwG 2015 12 13.35972 03 10 30.715 +16 13 35.00 25.4w 15VF173 568 C~2nwG 2016 01 01.35451 03 09 28.650 +16 09 58.36 25.2w 15VF173 568 C~2nwG 2016 01 07.30127 03 09 14.240 +16 09 12.32 25.3w 15VF173 568 C~2nwG 2016 02 04.33458 03 08 45.906 +16 08 22.12 25.3w 15VF173 568 C~2nwG 2016 02 11.22361 03 08 49.661 +16 08 53.59 25.1w 15VF173 568 C~2nwG 2016 09 06.60560 03 20 57.714 +16 56 46.17 24.9w 15VF173 568 C~2nwG 2016 09 26.59656 03 20 17.112 +16 53 46.00 25.5w 15VF173 568 C~2nwG 2016 10 10.40230 03 19 32.620 +16 50 43.87 25.1w 15VF173 568 C~2nwG 2016 10 10.46065 03 19 32.421 +16 50 43.04 25.2w 15VF173 568 C~2nwG 2016 10 27.49679 03 18 23.909 +16 46 12.84 25.2w 15VF173 568 C~2nwG 2016 11 02.60285 03 17 56.905 +16 44 28.40 24.5w 15VF173 568 C~2nwG 2016 11 03.52184 03 17 52.784 +16 44 12.62 25.1w 15VF173 568 C~2nwG 2016 12 24.29598 03 14 18.733 +16 31 08.33 24.7w 15VF173 568 C~2nwG 2017 01 02.39822 03 13 52.088 +16 29 40.41 25.2w 15VF173 568 C~2nwG 2017 01 26.32220 03 13 12.844 +16 27 57.47 25.0w 15VF173 568 C~2nwG 2017 12 16.39181 03 19 17.559 +16 52 23.12 25.3w 15VF173 568 C~2nwG
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 0.11
2 0.0713 -72.96 0.07 -40.55 0.08
3 0.0874 -207.25 -0.05 -49.13 -0.05
4 0.1556 -1200.51 0.19 -77.57 0.11
5 0.1557 -1201.02 0.05 -77.64 0.05
6 0.1584 -1253.67 0.03 -78.42 0.11
7 0.1586 -1257.09 -0.21 -78.53 0.03
8 0.2403 -3106.51 0.04 -89.53 -0.11
9 0.2404 -3109.28 0.17 -89.45 -0.05
10 0.2405 -3112.25 0.10 -89.31 0.07
11 0.2490 -3322.27 -0.11 -88.82 -0.07
12 0.2677 -3788.50 0.03 -86.23 -0.01
13 0.2678 -3791.80 -0.04 -86.21 -0.02
14 0.3197 -5030.21 -0.05 -70.52 -0.03
15 0.3201 -5039.37 0.09 -70.51 -0.20
16 0.3387 -5440.32 0.02 -61.77 -0.03
17 0.3389 -5443.74 -0.01 -61.52 0.12
18 0.3909 -6363.87 -0.02 -30.51 -0.02
19 0.4071 -6576.42 -0.03 -19.03 -0.10
20 0.4839 -6983.54 -0.21 42.60 0.06
21 0.5028 -6922.89 0.01 58.33 -0.08
22 1.0733 3935.44 -0.13 84.52 0.05
23 1.1280 3325.90 -0.05 59.11 -0.13
24 1.1658 2661.75 -0.14 46.71 0.02
25 1.1660 2658.78 0.10 46.64 -0.03
26 1.2126 1638.49 -0.01 38.76 0.06
27 1.2293 1236.79 -0.13 38.07 -0.05
28 1.2318 1175.52 -0.02 38.14 0.00
29 1.3709 -1999.12 0.05 83.58 0.12
30 1.3958 -2391.99 0.03 99.66 -0.03
31 1.4613 -2963.72 0.02 149.36 -0.03
32 2.3485 2478.26 0.14 198.17 0.05
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.
15VF173 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.738 43.746 43.729 ecceobj 0.059 0.058 0.059 incobj 2.290 2.290 2.290 qmin 39.923 39.896 39.822 qmax 47.121 47.183 47.260 amean 43.450 43.459 43.443 amin 43.103 43.120 43.113 amax 43.815 43.818 43.806 emean 0.058 0.058 0.059 emin 0.041 0.041 0.041 emax 0.077 0.077 0.079 imean 0.835 0.834 0.841 imin 0.329 0.326 0.330 imax 1.247 1.247 1.265 excite_mean 0.060 0.060 0.061 fracstop 1.000 1.000 1.000 cjmean 3.091 3.091 3.090 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 173.6 173.5 173.3 kozaiamp 179.9 180.0 180.0