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: 15VT166 # Created Sun Dec 22 02:10:34 2024 # Orbit generated from Bernstein formalism # Fitting 33 observations of 33 # Arc: 2.27y # First observation: 2015/09/07 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000072 0.024092 -0.000016 0.003398 0.024497 0.000000 # Chi-squared of fit: 7.72 DOF: 60 RMS: 0.09 # Min/Max residuals: -0.27 0.20 # Exact a, adot, b, bdot, g, gdot: 1.526425E-05 2.375935E-02 1.853512E-06 3.331449E-03 2.433981E-02 -4.238166E-03 # Covariance matrix: 1.7054E-13 -2.8063E-14 -7.6386E-16 7.3602E-15 1.0388E-13 1.0434E-12 -2.8063E-14 3.2745E-13 -1.4465E-14 5.9026E-14 1.9108E-13 8.3179E-12 -7.6386E-16 -1.4465E-14 1.0711E-13 -7.2556E-14 -8.9760E-15 -4.8714E-13 7.3602E-15 5.9026E-14 -7.2556E-14 8.9918E-14 4.1983E-14 1.9648E-12 1.0388E-13 1.9108E-13 -8.9760E-15 4.1983E-14 2.3692E-13 5.9239E-12 1.0434E-12 8.3179E-12 -4.8714E-13 1.9648E-12 5.9239E-12 2.7684E-10 # lat0 lon0 xBary yBary zBary JD0 -2.226106 52.958647 0.940111 -0.014304 -0.371779 2457273.121609 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 295.89245 +/- 0.044 Argument of Peri: 71.65407 +/- 0.022 Long of Asc Node: 67.02751 +/- 0.001 Inclination: 8.27038 +/- 0.001 Eccentricity: 0.20455691 +/- 0.0007 Semi-Major Axis: 43.71213482 +/- 0.0127 Time of Perihelion: 2476068.3471 +/- 10.0 Perihelion: 34.77051566 +/- 0.0323 Aphelion: 52.65375398 +/- 0.0343 Period (y) 289.0089 +/- 0.13 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 25.70098541 +/- 0.0005 Ecliptic Y 32.49970456 +/- 0.0007 Ecliptic Z -1.59578310 +/- 0.0000 Ecliptic XDOT -0.00241330 +/- 0.0000 Ecliptic YDOT 0.00123489 +/- 0.0000 Ecliptic ZDOT 0.00039302 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.46465931 +/- 0.0006 Geocenter to KBO 41.08495249 +/- 0.0008 # Hcoef: 7.95
The following table shows the complete astrometric record for 15VT166. 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 (15VT166) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62082 03 24 35.204 +16 21 26.75 24.3w 15VT166 568 C~2lVg 2015 09 12.48448 03 24 27.950 +16 20 53.94 24.3w 15VT166 568 C~2lVg 2015 10 07.52687 03 23 18.701 +16 16 18.23 24.1w 15VT166 568 C~2lVg 2015 10 07.58621 03 23 18.474 +16 16 17.26 24.4w 15VT166 568 C~2lVg 2015 10 09.56611 03 23 10.984 +16 15 49.03 24.4w 15VT166 568 C~2lVg 2015 11 06.33883 03 21 05.244 +16 08 13.49 24.0r 15VT166 568 C~2lVg 2015 11 06.40946 03 21 04.883 +16 08 12.30 23.8r 15VT166 568 C~2lVg 2015 11 06.47899 03 21 04.525 +16 08 10.99 24.2r 15VT166 568 C~2lVg 2015 11 17.47779 03 20 08.936 +16 05 00.01 24.1w 15VT166 568 C~2lVg 2015 11 17.56554 03 20 08.499 +16 04 58.36 24.8w 15VT166 568 C~2lVg 2015 12 06.48092 03 18 35.585 +15 59 55.24 24.3w 15VT166 568 C~2lVg 2015 12 31.36453 03 16 56.790 +15 55 12.16 24.6w 15VT166 568 C~2lVg 2016 01 07.39390 03 16 36.714 +15 54 27.15 24.3w 15VT166 568 C~2lVg 2016 02 05.29346 03 16 01.819 +15 54 38.50 24.5w 15VT166 568 C~2lVg 2016 02 11.24684 03 16 04.897 +15 55 21.99 24.5w 15VT166 568 C~2lVg 2016 09 07.57941 03 29 53.997 +16 52 43.31 15VT166 568 C~2lVg 2016 09 29.49059 03 29 05.734 +16 49 34.76 24.1w 15VT166 568 C~2lVg 2016 10 05.49370 03 28 45.617 +16 48 20.57 24.3w 15VT166 568 C~2lVg 2016 10 07.49825 03 28 38.325 +16 47 54.24 24.4w 15VT166 568 C~2lVg 2016 10 07.59395 03 28 37.946 +16 47 52.98 24.4w 15VT166 568 C~2lVg 2016 10 09.49835 03 28 30.753 +16 47 27.09 24.5w 15VT166 568 C~2lVg 2016 10 09.57103 03 28 30.487 +16 47 26.02 24.2w 15VT166 568 C~2lVg 2016 11 02.48525 03 26 43.495 +16 41 12.59 24.3w 15VT166 568 C~2lVg 2016 11 04.46126 03 26 33.672 +16 40 39.28 24.3w 15VT166 568 C~2lVg 2016 12 28.46047 03 22 22.219 +16 27 43.02 24.2w 15VT166 568 C~2lVg 2016 12 29.39076 03 22 19.060 +16 27 35.09 24.3w 15VT166 568 C~2lVg 2017 01 27.30287 03 21 18.038 +16 26 00.07 24.4w 15VT166 568 C~2lVg 2017 09 16.62789 03 35 04.756 +17 22 56.97 24.5w 15VT166 568 C~2lVg 2017 09 23.56691 03 34 49.257 +17 22 00.27 24.5w 15VT166 568 C~2lVg 2017 12 13.38599 03 28 47.773 +17 02 33.60 24.2w 15VT166 568 C~2lVg 2017 12 13.39528 03 28 47.710 +17 02 33.32 24.2w 15VT166 568 C~2lVg 2017 12 13.42326 03 28 47.589 +17 02 33.22 24.2w 15VT166 568 C~2lVg 2017 12 13.43255 03 28 47.549 +17 02 33.11 24.1w 15VT166 568 C~2lVg
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 0.04 0.00 0.06
2 0.0133 -109.29 -0.01 -5.69 -0.02
3 0.0819 -1143.52 0.02 -22.82 0.07
4 0.0820 -1146.93 -0.04 -22.94 -0.05
5 0.0875 -1258.42 -0.07 -23.16 0.04
6 0.1635 -3126.18 -0.06 -6.36 -0.03
7 0.1637 -3131.51 -0.08 -6.19 0.01
8 0.1639 -3136.84 -0.16 -6.15 -0.06
9 0.1940 -3960.40 0.01 12.97 0.08
10 0.1942 -3966.91 0.17 12.98 -0.09
11 0.2460 -5340.03 0.01 62.70 0.20
12 0.3142 -6790.92 -0.02 156.45 -0.07
13 0.3334 -7082.63 0.02 187.97 0.06
14 0.4125 -7566.45 0.04 329.62 -0.11
15 0.4288 -7512.20 0.08 360.10 0.05
16 1.0019 4904.28 0.08 689.13 -0.05
17 1.0619 4186.01 0.03 675.15 -0.03
18 1.0784 3887.67 0.05 673.82 -0.27
19 1.0839 3779.67 0.16 673.92 -0.12
20 1.0841 3774.08 -0.05 674.03 -0.04
21 1.0893 3667.56 -0.13 674.22 0.06
22 1.0895 3663.59 0.13 674.12 -0.07
23 1.1550 2081.75 -0.05 690.33 0.06
24 1.1604 1936.74 -0.01 692.95 0.05
25 1.3083 -1757.83 -0.04 844.63 0.05
26 1.3108 -1803.81 -0.09 848.43 0.05
27 1.3900 -2677.28 0.05 978.67 0.03
28 2.0260 9670.27 0.00 1381.16 0.08
29 2.0450 9440.78 -0.03 1378.62 0.08
30 2.2663 4126.50 0.14 1493.55 -0.06
31 2.2663 4125.56 -0.18 1493.50 -0.15
32 2.2664 4123.85 -0.01 1493.82 0.08
33 2.2664 4123.27 0.02 1493.86 0.09
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.
15VT166 quality flag:3 Type: 7:4EEE 7:4EEE 7:4EEE axisobj 44.069 44.099 44.039 ecceobj 0.201 0.203 0.199 incobj 8.247 8.247 8.247 qmin 33.733 33.693 33.575 qmax 54.199 54.340 54.346 amean 43.726 43.727 43.726 amin 43.343 43.322 43.341 amax 44.171 44.209 44.187 emean 0.199 0.187 0.199 emin 0.158 0.147 0.156 emax 0.227 0.229 0.230 imean 7.581 8.320 7.490 imin 5.765 5.774 5.426 imax 9.101 10.200 9.079 excite_mean 0.240 0.239 0.239 fracstop 1.000 1.000 1.000 cjmean 3.029 3.030 3.030 libcent 0 181.2 179.5 181.2 libamp 0 29.8 55.3 29.3 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 176.8 202.0 174.0 kozaiamp 180.0 180.0 180.0