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: 15VT169 # Created Sun Apr 27 01:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 34 observations of 34 # Arc: 2.32y # First observation: 2015/08/20 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000119 0.025681 -0.000001 0.000532 0.024970 0.000000 # Chi-squared of fit: 11.69 DOF: 62 RMS: 0.10 # Min/Max residuals: -0.32 0.24 # Exact a, adot, b, bdot, g, gdot: 1.543973E-05 2.528358E-02 6.433076E-07 5.236476E-04 2.471608E-02 8.385162E-04 # Covariance matrix: 1.6339E-13 -7.4028E-15 2.9758E-16 1.3383E-15 1.1302E-13 1.3978E-12 -7.4028E-15 3.6240E-13 -1.1015E-15 8.1811E-15 2.0372E-13 8.4299E-12 2.9758E-16 -1.1015E-15 8.6691E-14 -6.1741E-14 -2.4108E-16 -3.5450E-14 1.3383E-15 8.1811E-15 -6.1741E-14 8.5331E-14 5.7181E-15 2.4970E-13 1.1302E-13 2.0372E-13 -2.4108E-16 5.7181E-15 2.3059E-13 5.9128E-12 1.3978E-12 8.4299E-12 -3.5450E-14 2.4970E-13 5.9128E-12 2.5722E-10 # lat0 lon0 xBary yBary zBary JD0 -0.565660 53.791622 1.012880 -0.000453 -0.059096 2457255.045359 # Heliocentric elements and errors Epoch: 2457250.5000 = 2015/08/16 Mean Anomaly: 4.25864 +/- 0.446 Argument of Peri: 329.31219 +/- 0.520 Long of Asc Node: 78.07182 +/- 0.012 Inclination: 1.30145 +/- 0.001 Eccentricity: 0.07440351 +/- 0.0001 Semi-Major Axis: 43.77511043 +/- 0.0028 Time of Perihelion: 2455999.0659 +/- 131.1 Perihelion: 40.51808850 +/- 0.0051 Aphelion: 47.03213235 +/- 0.0053 Period (y) 289.6337 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 24.74734852 +/- 0.0005 Ecliptic Y 32.09332343 +/- 0.0006 Ecliptic Z -0.39938453 +/- 0.0000 Ecliptic XDOT -0.00220661 +/- 0.0000 Ecliptic YDOT 0.00172348 +/- 0.0000 Ecliptic ZDOT 0.00005714 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.52865870 +/- 0.0006 Geocenter to KBO 40.45949283 +/- 0.0008 # Hcoef: 8.42
The following table shows the complete astrometric record for 15VT169. 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 (15VT169) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.54457 03 26 14.218 +18 10 21.79 24.8w 15VT169 568 C~2nw3 2015 08 20.55007 03 26 14.189 +18 10 21.67 25.0w 15VT169 568 C~2nw3 2015 09 07.60044 03 26 08.526 +18 09 51.15 25.3w 15VT169 568 C~2nw3 2015 09 12.44733 03 26 01.599 +18 09 23.36 24.7w 15VT169 568 C~2nw3 2015 10 07.49766 03 24 52.713 +18 05 01.84 25.0w 15VT169 568 C~2nw3 2015 10 07.55607 03 24 52.498 +18 05 01.05 25.2w 15VT169 568 C~2nw3 2015 10 09.53675 03 24 44.958 +18 04 32.86 24.7w 15VT169 568 C~2nw3 2015 11 06.31257 03 22 37.590 +17 56 40.92 24.3r 15VT169 568 C~2nw3 2015 11 06.37589 03 22 37.279 +17 56 39.51 24.4r 15VT169 568 C~2nw3 2015 11 06.44667 03 22 36.911 +17 56 38.59 24.4r 15VT169 568 C~2nw3 2015 11 07.46686 03 22 31.696 +17 56 19.28 24.9w 15VT169 568 C~2nw3 2015 11 17.44798 03 21 40.328 +17 53 10.34 24.8w 15VT169 568 C~2nw3 2015 11 17.49527 03 21 40.070 +17 53 09.49 25.1w 15VT169 568 C~2nw3 2015 12 06.31417 03 20 05.895 +17 47 24.95 24.4w 15VT169 568 C~2nw3 2015 12 06.44064 03 20 05.258 +17 47 22.92 23.9w 15VT169 568 C~2nw3 2015 12 06.44787 03 20 05.230 +17 47 22.67 24.4w 15VT169 568 C~2nw3 2015 12 31.33561 03 18 24.626 +17 41 21.52 24.0w 15VT169 568 C~2nw3 2016 01 07.36493 03 18 04.259 +17 40 11.04 24.8w 15VT169 568 C~2nw3 2016 01 07.41708 03 18 04.112 +17 40 10.30 24.8w 15VT169 568 C~2nw3 2016 02 05.31154 03 17 29.488 +17 38 30.88 24.6w 15VT169 568 C~2nw3 2016 02 11.26421 03 17 32.925 +17 38 50.97 25.3w 15VT169 568 C~2nw3 2016 09 07.61412 03 32 03.089 +18 32 50.16 15VT169 568 C~2nw3 2016 09 27.53935 03 31 21.955 +18 30 17.43 24.9w 15VT169 568 C~2nw3 2016 10 09.53365 03 30 41.054 +18 27 49.61 24.3w 15VT169 568 C~2nw3 2016 10 09.60571 03 30 40.766 +18 27 48.61 24.8w 15VT169 568 C~2nw3 2016 11 02.47946 03 28 53.260 +18 21 24.91 24.8w 15VT169 568 C~2nw3 2016 11 04.45547 03 28 43.329 +18 20 49.59 24.5w 15VT169 568 C~2nw3 2016 12 24.34518 03 24 43.168 +18 06 44.63 24.8w 15VT169 568 C~2nw3 2017 01 27.31434 03 23 23.167 +18 02 24.16 24.9w 15VT169 568 C~2nw3 2017 01 27.31949 03 23 23.160 +18 02 24.13 24.9w 15VT169 568 C~2nw3 2017 09 15.55809 03 37 48.890 +18 54 29.74 24.6w 15VT169 568 C~2nw3 2017 09 20.60688 03 37 38.915 +18 53 54.11 24.5w 15VT169 568 C~2nw3 2017 12 13.36234 03 31 29.382 +18 32 49.67 24.5w 15VT169 568 C~2nw3 2017 12 13.40466 03 31 29.183 +18 32 48.96 24.8w 15VT169 568 C~2nw3
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 0.15 0.00 -0.06
2 0.0000 -0.43 -0.32 -0.01 -0.08
3 0.0494 -86.18 0.01 -9.62 0.01
4 0.0627 -188.72 -0.04 -12.11 -0.02
5 0.1313 -1204.96 -0.04 -21.55 0.05
6 0.1314 -1208.12 0.08 -21.55 0.04
7 0.1369 -1319.28 0.04 -22.06 0.02
8 0.2129 -3196.71 0.02 -23.52 -0.02
9 0.2131 -3201.36 0.17 -23.76 -0.31
10 0.2133 -3206.68 0.24 -23.33 0.08
11 0.2161 -3283.58 -0.08 -23.25 -0.02
12 0.2434 -4040.94 0.05 -20.77 -0.03
13 0.2435 -4044.72 -0.07 -20.66 0.06
14 0.2951 -5433.58 0.04 -11.91 -0.06
15 0.2954 -5442.91 -0.28 -11.55 0.19
16 0.2954 -5443.36 -0.22 -11.69 0.04
17 0.3636 -6926.55 0.02 7.79 0.01
18 0.3828 -7226.31 0.22 14.70 0.10
19 0.3830 -7228.54 0.04 14.53 -0.12
20 0.4621 -7732.98 0.03 46.33 0.18
21 0.4784 -7680.25 -0.03 53.04 0.08
22 1.0515 5146.56 0.02 98.67 -0.05
23 1.1061 4541.63 0.08 90.82 0.08
24 1.1389 3941.04 0.04 87.55 -0.08
25 1.1391 3936.82 -0.02 87.57 -0.06
26 1.2045 2359.01 0.04 86.52 0.00
27 1.2099 2213.26 0.04 86.75 -0.01
28 1.3465 -1311.14 0.03 111.91 0.00
29 1.4395 -2480.92 -0.09 145.14 -0.03
30 1.4395 -2481.02 -0.14 145.13 -0.04
31 2.0726 10234.15 -0.10 204.19 0.04
32 2.0864 10087.83 -0.03 202.34 -0.02
33 2.3157 4680.83 0.08 213.24 0.04
34 2.3158 4677.91 0.04 213.23 -0.01
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.
15VT169 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.218 44.230 44.206 ecceobj 0.083 0.084 0.083 incobj 1.300 1.300 1.300 qmin 39.089 39.139 39.004 qmax 48.943 48.862 48.948 amean 43.853 43.865 43.842 amin 43.501 43.509 43.474 amax 44.253 44.244 44.218 emean 0.087 0.087 0.087 emin 0.066 0.067 0.066 emax 0.106 0.105 0.107 imean 0.866 0.866 0.865 imin 0.448 0.425 0.481 imax 1.324 1.319 1.324 excite_mean 0.089 0.089 0.089 fracstop 1.000 1.000 1.000 cjmean 3.090 3.090 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 182.5 193.7 186.4 kozaiamp 179.9 180.0 180.0