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: 15VA167 # Created Tue Apr 1 01:10:39 2025 # Orbit generated from Bernstein formalism # Fitting 36 observations of 36 # Arc: 2.83y # First observation: 2014/11/17 # Last observation: 2017/09/16 Preliminary a, adot, b, bdot, g, gdot: -0.000020 0.025442 0.000004 -0.005092 0.025340 0.000000 # Chi-squared of fit: 3.44 DOF: 66 RMS: 0.05 # Min/Max residuals: -0.17 0.15 # Exact a, adot, b, bdot, g, gdot: 1.599230E-05 2.550136E-02 -3.277655E-06 -5.108927E-03 2.538553E-02 -1.546405E-03 # Covariance matrix: 2.5240E-13 -2.9680E-13 -1.4846E-14 3.6476E-14 -1.1906E-13 -2.9409E-12 -2.9680E-13 5.0980E-13 3.2393E-14 -7.9495E-14 2.4863E-13 6.4133E-12 -1.4846E-14 3.2393E-14 1.6589E-13 -1.0909E-13 1.9222E-14 4.9117E-13 3.6476E-14 -7.9495E-14 -1.0909E-13 1.0170E-13 -4.8216E-14 -1.2060E-12 -1.1906E-13 2.4863E-13 1.9222E-14 -4.8216E-14 2.7346E-13 3.8454E-12 -2.9409E-12 6.4133E-12 4.9117E-13 -1.2060E-12 3.8454E-12 9.7267E-11 # lat0 lon0 xBary yBary zBary JD0 -1.276665 48.112756 -0.109393 -0.021764 -0.983169 2456978.777218 # Heliocentric elements and errors Epoch: 2456970.5000 = 2014/11/09 Mean Anomaly: 326.13321 +/- 0.143 Argument of Peri: 227.04925 +/- 0.184 Long of Asc Node: 222.07579 +/- 0.000 Inclination: 11.39023 +/- 0.001 Eccentricity: 0.09735136 +/- 0.0003 Semi-Major Axis: 43.76828988 +/- 0.0041 Time of Perihelion: 2466920.1841 +/- 42.1 Perihelion: 39.50738745 +/- 0.0122 Aphelion: 48.02919231 +/- 0.0125 Period (y) 289.5660 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 26.86657766 +/- 0.0005 Ecliptic Y 30.12553760 +/- 0.0006 Ecliptic Z -0.87781475 +/- 0.0000 Ecliptic XDOT -0.00217132 +/- 0.0000 Ecliptic YDOT 0.00169808 +/- 0.0000 Ecliptic ZDOT -0.00054705 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.37488786 +/- 0.0006 Geocenter to KBO 39.39252531 +/- 0.0008 # Hcoef: 7.53
The following table shows the complete astrometric record for 15VA167. 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 (15VA167) followed by the observatory code and reference code for the source of the astrometry.
2014 11 17.27644 03 04 05.011 +15 59 55.01 23.9r 15VA167 568 C~2lVh 2014 11 17.38513 03 04 04.457 +15 59 52.45 23.7r 15VA167 568 C~2lVh 2014 11 17.49897 03 04 03.881 +15 59 49.72 23.4r 15VA167 568 C~2lVh 2014 11 19.28749 03 03 54.952 +15 59 07.82 23.5r 15VA167 568 C~2lVh 2014 11 23.39103 03 03 34.640 +15 57 32.90 23.5r 15VA167 568 C~2lVh 2015 09 06.62350 03 14 51.503 +16 30 03.75 23.6w 15VA167 568 C~2lVh 2015 09 12.51312 03 14 42.117 +16 28 56.99 23.8w 15VA167 568 C~2lVh 2015 10 07.43992 03 13 29.605 +16 22 13.22 23.8w 15VA167 568 C~2lVh 2015 10 07.44703 03 13 29.575 +16 22 13.12 23.8w 15VA167 568 C~2lVh 2015 10 08.45165 03 13 25.677 +16 21 53.36 23.9w 15VA167 568 C~2lVh 2015 10 08.51072 03 13 25.442 +16 21 52.17 23.7w 15VA167 568 C~2lVh 2015 11 07.35903 03 11 07.920 +16 10 51.77 23.5r 15VA167 568 C~2lVh 2015 11 07.40112 03 11 07.704 +16 10 50.80 23.6r 15VA167 568 C~2lVh 2015 11 07.44330 03 11 07.490 +16 10 49.85 23.6r 15VA167 568 C~2lVh 2015 11 10.52886 03 10 51.848 +16 09 37.68 23.6w 15VA167 568 C~2lVh 2015 11 17.37547 03 10 17.128 +16 06 58.61 23.5w 15VA167 568 C~2lVh 2015 11 17.42215 03 10 16.888 +16 06 57.54 23.5w 15VA167 568 C~2lVh 2015 12 06.38432 03 08 44.887 +16 00 02.71 23.8w 15VA167 568 C~2lVh 2015 12 13.31874 03 08 14.626 +15 57 47.86 23.8w 15VA167 568 C~2lVh 2015 12 13.37723 03 08 14.373 +15 57 46.75 23.7w 15VA167 568 C~2lVh 2016 01 01.37186 03 07 07.228 +15 52 49.52 23.8w 15VA167 568 C~2lVh 2016 01 07.31862 03 06 52.018 +15 51 42.30 23.8w 15VA167 568 C~2lVh 2016 02 04.29505 03 06 25.884 +15 49 40.94 23.9w 15VA167 568 C~2lVh 2016 02 04.30157 03 06 25.890 +15 49 40.94 23.8w 15VA167 568 C~2lVh 2016 02 10.28486 03 06 30.635 +15 49 58.33 23.9w 15VA167 568 C~2lVh 2016 09 06.59240 03 20 58.706 +16 35 42.10 23.9w 15VA167 568 C~2lVh 2016 09 26.58845 03 20 15.480 +16 31 11.40 23.8w 15VA167 568 C~2lVh 2016 10 10.39070 03 19 26.771 +16 26 58.79 23.9w 15VA167 568 C~2lVh 2016 10 10.44903 03 19 26.535 +16 26 57.66 23.9w 15VA167 568 C~2lVh 2016 10 27.49679 03 18 10.708 +16 20 54.99 23.7w 15VA167 568 C~2lVh 2016 11 02.60285 03 17 40.736 +16 18 37.10 23.9w 15VA167 568 C~2lVh 2016 11 03.52184 03 17 36.160 +16 18 16.25 23.7w 15VA167 568 C~2lVh 2016 12 24.30148 03 13 39.308 +16 01 03.45 23.8w 15VA167 568 C~2lVh 2017 01 02.40371 03 13 10.411 +15 59 02.76 23.9w 15VA167 568 C~2lVh 2017 01 26.29235 03 12 29.873 +15 56 17.11 23.6w 15VA167 568 C~2lVh 2017 09 16.60944 03 26 52.322 +16 38 53.87 23.7w 15VA167 568 C~2lVh
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 -0.02 0.00 0.02
2 0.0003 -8.38 -0.03 -0.25 0.00
3 0.0006 -17.12 0.02 -0.58 -0.06
4 0.0055 -152.44 -0.04 -5.26 -0.04
5 0.0167 -460.18 0.02 -15.44 -0.08
6 0.8031 9459.14 -0.17 -772.55 0.13
7 0.8193 9311.01 -0.07 -801.37 0.03
8 0.8875 8196.07 0.12 -914.77 -0.03
9 0.8875 8195.63 0.10 -914.75 0.02
10 0.8903 8136.21 0.01 -918.92 0.05
11 0.8904 8132.62 0.02 -919.17 0.03
12 0.9722 6045.53 0.10 -1027.39 -0.04
13 0.9723 6042.27 0.10 -1027.49 -0.04
14 0.9724 6039.04 0.15 -1027.58 -0.01
15 0.9808 5802.40 -0.05 -1036.64 -0.00
16 0.9996 5277.39 -0.03 -1055.39 0.02
17 0.9997 5273.77 -0.02 -1055.49 0.02
18 1.0516 3884.15 -0.07 -1096.80 0.05
19 1.0706 3427.41 0.01 -1108.24 0.02
20 1.0708 3423.60 -0.04 -1108.31 0.01
21 1.1228 2410.51 0.08 -1130.72 0.00
22 1.1391 2181.01 -0.01 -1135.49 0.00
23 1.2157 1785.04 -0.07 -1149.14 0.01
24 1.2157 1785.12 -0.02 -1149.16 -0.01
25 1.2321 1855.75 -0.00 -1151.17 0.05
26 1.8051 14663.76 0.02 -1821.35 -0.04
27 1.8599 13990.35 -0.04 -1923.42 -0.06
28 1.8976 13245.06 -0.01 -1986.84 -0.02
29 1.8978 13241.48 0.02 -1987.05 -0.01
30 1.9445 12089.28 -0.03 -2054.53 -0.01
31 1.9612 11635.31 -0.11 -2075.37 -0.02
32 1.9637 11566.05 0.01 -2078.33 -0.00
33 2.1027 7993.93 0.00 -2177.15 -0.03
34 2.1277 7559.53 -0.02 -2182.81 -0.07
35 2.1931 6951.12 0.05 -2186.77 0.13
36 2.8318 19665.20 0.02 -2927.18 -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.
15VA167 quality flag:2 Type: SCATNEAR SCATNEAR CLASSICAL axisobj 44.092 44.102 44.082 ecceobj 0.100 0.100 0.099 incobj 11.351 11.351 11.351 qmin 34.024 34.127 34.207 qmax 53.960 53.711 53.729 amean 43.727 43.726 43.727 amin 43.327 43.321 43.337 amax 44.202 44.196 44.180 emean 0.152 0.150 0.148 emin 0.057 0.062 0.051 emax 0.221 0.217 0.217 imean 10.172 10.447 10.511 imin 6.819 7.088 7.165 imax 13.037 13.317 13.240 excite_mean 0.239 0.241 0.241 fracstop 1.000 1.000 1.000 cjmean 3.029 3.028 3.028 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 286.8 267.9 272.7 kozaiamp 71.0 66.8 70.0