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: 15VT167 # Created Tue Apr 1 01:10:39 2025 # Orbit generated from Bernstein formalism # Fitting 34 observations of 34 # Arc: 2.28y # First observation: 2015/09/06 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000110 0.026255 -0.000004 0.002462 0.024654 0.000000 # Chi-squared of fit: 5.75 DOF: 62 RMS: 0.07 # Min/Max residuals: -0.23 0.14 # Exact a, adot, b, bdot, g, gdot: 1.732040E-05 2.605456E-02 1.512413E-06 2.446919E-03 2.457540E-02 1.857436E-03 # Covariance matrix: 1.8928E-13 -3.9111E-14 1.4768E-15 4.5802E-15 1.2286E-13 1.0991E-12 -3.9111E-14 3.4584E-13 -6.5704E-15 3.5564E-14 1.6514E-13 7.9336E-12 1.4768E-15 -6.5704E-15 1.0037E-13 -7.4107E-14 -1.4800E-15 -2.0527E-13 4.5802E-15 3.5564E-14 -7.4107E-14 9.7946E-14 2.2973E-14 1.1156E-12 1.2286E-13 1.6514E-13 -1.4800E-15 2.2973E-14 2.2757E-13 5.2169E-12 1.0991E-12 7.9336E-12 -2.0527E-13 1.1156E-12 5.2169E-12 2.4890E-10 # lat0 lon0 xBary yBary zBary JD0 -3.297698 51.400866 0.936471 -0.021810 -0.381083 2457272.115599 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 11.30031 +/- 0.134 Argument of Peri: 311.39402 +/- 0.204 Long of Asc Node: 81.74965 +/- 0.003 Inclination: 6.20668 +/- 0.001 Eccentricity: 0.18903137 +/- 0.0002 Semi-Major Axis: 50.31174753 +/- 0.0067 Time of Perihelion: 2453178.9263 +/- 48.5 Perihelion: 40.80124918 +/- 0.0133 Aphelion: 59.82224587 +/- 0.0145 Period (y) 356.8719 +/- 0.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 26.30972622 +/- 0.0005 Ecliptic Y 31.46255073 +/- 0.0006 Ecliptic Z -2.34064061 +/- 0.0000 Ecliptic XDOT -0.00213171 +/- 0.0000 Ecliptic YDOT 0.00197816 +/- 0.0000 Ecliptic ZDOT 0.00026030 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.08007291 +/- 0.0006 Geocenter to KBO 40.69110244 +/- 0.0008 # Hcoef: 8.72
The following table shows the complete astrometric record for 15VT167. 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 (15VT167) followed by the observatory code and reference code for the source of the astrometry.
2015 09 06.61481 03 19 27.695 +14 55 36.06 25.9w 15VT167 568 C~2lVk 2015 09 12.50491 03 19 19.002 +14 54 43.69 25.3w 15VT167 568 C~2lVk 2015 10 07.42821 03 18 09.821 +14 49 14.32 24.9w 15VT167 568 C~2lVk 2015 10 08.44001 03 18 06.055 +14 48 58.14 24.8w 15VT167 568 C~2lVk 2015 11 07.34843 03 15 52.179 +14 40 03.29 25.0r 15VT167 568 C~2lVk 2015 11 07.39058 03 15 51.978 +14 40 02.21 24.4r 15VT167 568 C~2lVk 2015 11 07.43274 03 15 51.770 +14 40 01.58 24.8r 15VT167 568 C~2lVk 2015 11 10.51713 03 15 36.476 +14 39 04.96 25.0w 15VT167 568 C~2lVk 2015 11 10.54648 03 15 36.315 +14 39 04.46 24.8w 15VT167 568 C~2lVk 2015 11 17.36382 03 15 02.412 +14 37 01.19 24.9w 15VT167 568 C~2lVk 2015 11 17.41043 03 15 02.175 +14 37 00.43 25.0w 15VT167 568 C~2lVk 2015 12 06.37266 03 13 31.388 +14 31 52.67 24.8w 15VT167 568 C~2lVk 2015 12 13.30706 03 13 01.278 +14 30 19.87 24.9w 15VT167 568 C~2lVk 2015 12 13.36559 03 13 01.033 +14 30 19.09 25.2w 15VT167 568 C~2lVk 2016 01 01.36029 03 11 53.503 +14 27 21.29 25.0w 15VT167 568 C~2lVk 2016 01 07.30705 03 11 37.931 +14 26 52.20 25.0w 15VT167 568 C~2lVk 2016 02 11.22942 03 11 13.290 +14 28 52.54 25.0w 15VT167 568 C~2lVk 2016 09 07.56785 03 25 14.931 +15 26 09.25 15VT167 568 C~2lVk 2016 09 25.60501 03 24 38.068 +15 23 02.58 25.5w 15VT167 568 C~2lVk 2016 09 27.50655 03 24 32.603 +15 22 37.79 25.1w 15VT167 568 C~2lVk 2016 10 10.44325 03 23 48.237 +15 19 28.39 25.0w 15VT167 568 C~2lVk 2016 10 10.50202 03 23 48.014 +15 19 27.36 25.4w 15VT167 568 C~2lVk 2016 10 10.51973 03 23 47.938 +15 19 27.10 25.1w 15VT167 568 C~2lVk 2016 10 10.53987 03 23 47.859 +15 19 26.78 25.2w 15VT167 568 C~2lVk 2016 10 10.58850 03 23 47.658 +15 19 25.91 24.8w 15VT167 568 C~2lVk 2016 11 02.50837 03 22 05.993 +15 12 51.72 25.0w 15VT167 568 C~2lVk 2016 11 04.48449 03 21 56.343 +15 12 16.33 24.9w 15VT167 568 C~2lVk 2016 12 24.31885 03 18 07.337 +14 59 59.23 15VT167 568 C~2lVk 2017 01 02.42106 03 17 38.186 +14 58 52.26 25.1w 15VT167 568 C~2lVk 2017 01 26.33541 03 16 55.690 +14 58 25.95 26.0w 15VT167 568 C~2lVk 2017 09 16.63393 03 30 51.218 +15 55 02.43 25.2w 15VT167 568 C~2lVk 2017 09 23.57295 03 30 35.808 +15 53 50.11 25.0w 15VT167 568 C~2lVk 2017 12 13.36708 03 24 43.625 +15 33 04.92 24.9w 15VT167 568 C~2lVk 2017 12 16.35926 03 24 30.946 +15 32 29.43 24.7w 15VT167 568 C~2lVk
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 -0.11 0.00 0.01
2 0.0161 -135.22 0.06 -18.24 0.10
3 0.0844 -1189.21 -0.15 -78.12 -0.08
4 0.0871 -1246.15 0.05 -79.65 0.03
5 0.1690 -3260.71 -0.05 -92.23 0.11
6 0.1691 -3263.81 0.01 -92.51 -0.23
7 0.1692 -3266.89 0.11 -92.33 -0.10
8 0.1777 -3495.98 0.09 -89.10 0.05
9 0.1778 -3498.36 -0.08 -88.97 0.14
10 0.1964 -4005.69 -0.04 -79.40 -0.05
11 0.1966 -4009.22 -0.04 -79.23 0.02
12 0.2485 -5362.48 0.09 -30.38 -0.12
13 0.2675 -5809.03 -0.01 -4.70 0.07
14 0.2676 -5812.68 0.03 -4.52 0.01
15 0.3196 -6806.49 -0.03 83.29 0.05
16 0.3359 -7032.56 -0.03 115.21 -0.01
17 0.4315 -7346.06 0.04 326.36 0.02
18 1.0047 5328.53 -0.10 498.32 0.06
19 1.0540 4765.35 -0.04 451.27 0.01
20 1.0593 4682.57 0.09 447.12 -0.04
21 1.0947 4013.52 0.02 425.28 0.08
22 1.0948 4010.13 0.12 425.10 -0.06
23 1.0949 4009.00 0.04 425.12 -0.01
24 1.0949 4007.82 0.05 425.10 -0.02
25 1.0951 4004.78 -0.09 424.99 -0.07
26 1.1578 2481.38 0.07 415.79 -0.01
27 1.1632 2337.28 -0.04 417.04 0.06
28 1.2997 -1057.44 0.11 554.22 0.02
29 1.3246 -1482.80 -0.06 598.74 -0.01
30 1.3901 -2084.41 -0.01 732.95 -0.06
31 2.0288 10470.77 0.01 977.63 -0.02
32 2.0478 10236.95 0.05 961.73 0.07
33 2.2690 4994.48 -0.15 1014.32 -0.05
34 2.2772 4808.11 0.01 1025.97 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.
15VT167 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 50.956 50.982 50.930 ecceobj 0.200 0.200 0.199 incobj 6.200 6.200 6.200 qmin 40.166 40.005 40.170 qmax 61.215 61.342 61.194 amean 50.415 50.411 50.415 amin 49.960 49.938 49.956 amax 50.973 50.982 50.966 emean 0.191 0.192 0.191 emin 0.181 0.180 0.181 emax 0.201 0.205 0.201 imean 4.679 4.729 4.680 imin 4.448 4.362 4.446 imax 4.939 5.095 4.941 excite_mean 0.207 0.209 0.207 fracstop 1.000 1.000 1.000 cjmean 3.129 3.128 3.129 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 184.7 174.0 185.1 kozaiamp 180.0 179.9 180.0