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: 15VT170
# Created Sun Apr 27 01:10:42 2025
# Orbit generated from Bernstein formalism
# Fitting 39 observations of 39
# Arc: 2.27y
# First observation: 2015/09/07
# Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
-0.000080 0.021680 0.000000 -0.000416 0.022960 0.000000
# Chi-squared of fit: 3.97 DOF: 72 RMS: 0.06
# Min/Max residuals: -0.14 0.14
# Exact a, adot, b, bdot, g, gdot:
1.538209E-05 2.154761E-02 -3.698824E-07 -4.144400E-04 2.292226E-02 9.359486E-04
# Covariance matrix:
1.8949E-13 -3.6608E-14 7.7344E-17 -1.2501E-15 1.2170E-13 1.6588E-12
-3.6608E-14 2.2904E-13 9.1997E-16 -4.2482E-15 1.2882E-13 5.4712E-12
7.7344E-17 9.1997E-16 1.0112E-13 -7.3636E-14 6.4305E-16 3.4365E-14
-1.2501E-15 -4.2482E-15 -7.3636E-14 8.4863E-14 -3.9731E-15 -1.6159E-13
1.2170E-13 1.2882E-13 6.4305E-16 -3.9731E-15 2.1466E-13 5.1717E-12
1.6588E-12 5.4712E-12 3.4365E-14 -1.6159E-13 5.1717E-12 2.0826E-10
# lat0 lon0 xBary yBary zBary JD0
0.382959 51.907355 0.933068 0.002751 -0.389358 2457273.129809
# Heliocentric elements and errors
Epoch: 2457270.5000 = 2015/09/05
Mean Anomaly: 124.89023 +/- 0.963
Argument of Peri: 33.66160 +/- 0.961
Long of Asc Node: 249.85885 +/- 0.012
Inclination: 1.15602 +/- 0.001
Eccentricity: 0.02462311 +/- 0.0005
Semi-Major Axis: 43.39354508 +/- 0.0028
Time of Perihelion: 2421049.3623 +/- 279.4
Perihelion: 42.32506111 +/- 0.0225
Aphelion: 44.46202905 +/- 0.0226
Period (y) 285.8551 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 27.88406947 +/- 0.0006
Ecliptic Y 34.06386281 +/- 0.0007
Ecliptic Z 0.29157924 +/- 0.0000
Ecliptic XDOT -0.00195820 +/- 0.0000
Ecliptic YDOT 0.00166960 +/- 0.0000
Ecliptic ZDOT -0.00004870 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.02218871 +/- 0.0006
Geocenter to KBO 43.62570897 +/- 0.0009
# Hcoef: 8.01
The following table shows the complete astrometric record for 15VT170. 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 (15VT170) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62902 03 17 32.435 +18 36 48.38 24.4w 15VT170 568 C~2nw7 2015 09 12.49264 03 17 24.840 +18 36 20.61 24.7w 15VT170 568 C~2nw7 2015 10 07.53854 03 16 15.903 +18 32 01.55 24.7w 15VT170 568 C~2nw7 2015 10 07.59790 03 16 15.675 +18 32 00.71 24.4w 15VT170 568 C~2nw7 2015 10 09.57780 03 16 08.379 +18 31 32.85 24.6w 15VT170 568 C~2nw7 2015 11 07.33264 03 14 02.764 +18 23 26.05 24.6r 15VT170 568 C~2nw7 2015 11 07.37479 03 14 02.554 +18 23 25.31 24.2r 15VT170 568 C~2nw7 2015 11 07.41697 03 14 02.350 +18 23 24.54 24.4r 15VT170 568 C~2nw7 2015 11 10.49950 03 13 47.597 +18 22 26.40 24.3w 15VT170 568 C~2nw7 2015 11 17.39294 03 13 14.496 +18 20 15.64 24.6w 15VT170 568 C~2nw7 2015 12 06.35508 03 11 46.987 +18 14 25.16 25.0w 15VT170 568 C~2nw7 2015 12 06.49265 03 11 46.373 +18 14 22.72 24.5w 15VT170 568 C~2nw7 2016 01 01.34294 03 10 12.616 +18 07 56.74 24.7w 15VT170 568 C~2nw7 2016 01 07.40549 03 09 57.274 +18 06 51.50 24.4w 15VT170 568 C~2nw7 2016 01 08.25043 03 09 55.377 +18 06 43.30 24.7w 15VT170 568 C~2nw7 2016 02 05.28189 03 09 28.788 +18 04 35.88 24.8w 15VT170 568 C~2nw7 2016 02 10.30227 03 09 31.860 +18 04 44.26 24.7w 15VT170 568 C~2nw7 2016 09 07.57363 03 22 34.953 +18 54 15.94 15VT170 568 C~2nw7 2016 09 27.51061 03 21 52.123 +18 51 41.13 24.6w 15VT170 568 C~2nw7 2016 09 29.48481 03 21 46.191 +18 51 19.25 24.6w 15VT170 568 C~2nw7 2016 10 07.49247 03 21 19.362 +18 49 40.49 25.1w 15VT170 568 C~2nw7 2016 10 07.58817 03 21 19.002 +18 49 39.13 24.8w 15VT170 568 C~2nw7 2016 10 09.49252 03 21 12.016 +18 49 13.18 24.4w 15VT170 568 C~2nw7 2016 10 09.56525 03 21 11.741 +18 49 12.23 24.5w 15VT170 568 C~2nw7 2016 11 02.53154 03 19 28.885 +18 42 45.73 24.6w 15VT170 568 C~2nw7 2016 11 02.53733 03 19 28.854 +18 42 45.72 24.7w 15VT170 568 C~2nw7 2016 11 04.40663 03 19 20.048 +18 42 12.16 24.7w 15VT170 568 C~2nw7 2016 11 04.41248 03 19 20.015 +18 42 12.06 24.6w 15VT170 568 C~2nw7 2016 12 24.30698 03 15 39.188 +18 27 50.74 24.9w 15VT170 568 C~2nw7 2016 12 24.32550 03 15 39.119 +18 27 50.42 24.9w 15VT170 568 C~2nw7 2017 01 02.40920 03 15 11.183 +18 25 57.02 24.7w 15VT170 568 C~2nw7 2017 01 02.42780 03 15 11.127 +18 25 56.82 24.7w 15VT170 568 C~2nw7 2017 01 26.29981 03 14 30.177 +18 23 01.48 24.8w 15VT170 568 C~2nw7 2017 01 27.27995 03 14 29.609 +18 22 58.46 24.7w 15VT170 568 C~2nw7 2017 09 15.56413 03 27 26.807 +19 10 32.18 15VT170 568 C~2nw7 2017 09 15.60695 03 27 26.710 +19 10 31.81 24.8w 15VT170 568 C~2nw7 2017 09 20.61305 03 27 16.250 +19 09 55.20 15VT170 568 C~2nw7 2017 09 22.59291 03 27 11.537 +19 09 38.57 24.6w 15VT170 568 C~2nw7 2017 12 16.36391 03 21 14.916 +18 47 39.00 24.8w 15VT170 568 C~2nw7
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 0.02
2 0.0133 -111.48 0.14 1.15 -0.04
3 0.0819 -1125.35 0.01 5.73 -0.01
4 0.0821 -1128.70 -0.11 5.77 0.01
5 0.0875 -1236.15 -0.03 5.93 -0.02
6 0.1662 -3088.76 0.05 4.84 0.02
7 0.1663 -3091.84 -0.02 4.91 0.08
8 0.1664 -3094.84 -0.01 4.93 0.09
9 0.1749 -3312.80 0.06 4.25 -0.05
10 0.1937 -3802.00 0.01 2.70 0.03
11 0.2457 -5097.26 0.03 -4.10 0.02
12 0.2460 -5106.34 -0.07 -4.12 0.04
13 0.3168 -6498.11 0.03 -18.42 0.04
14 0.3334 -6726.55 0.07 -22.46 0.00
15 0.3357 -6754.83 -0.07 -23.09 -0.02
16 0.4125 -7154.71 -0.08 -43.70 -0.11
17 0.4262 -7110.21 0.07 -47.44 -0.01
18 1.0019 4422.42 -0.02 -85.21 -0.02
19 1.0565 3794.91 0.04 -81.45 -0.03
20 1.0619 3707.88 0.05 -81.30 -0.14
21 1.0838 3314.30 0.07 -80.27 0.05
22 1.0841 3309.01 -0.04 -80.29 0.00
23 1.0893 3206.46 -0.07 -80.21 -0.01
24 1.0895 3202.44 -0.02 -80.13 0.03
25 1.1551 1691.14 -0.03 -81.08 -0.08
26 1.1551 1690.71 -0.06 -80.98 0.03
27 1.1602 1561.17 0.09 -81.34 -0.02
28 1.1603 1560.69 0.02 -81.31 -0.00
29 1.2969 -1695.01 0.05 -100.03 -0.04
30 1.2969 -1696.04 -0.02 -100.08 -0.09
31 1.3218 -2109.41 0.02 -105.47 0.00
32 1.3218 -2110.23 -0.04 -105.45 0.03
33 1.3872 -2718.72 -0.02 -121.62 0.10
34 1.3899 -2727.32 0.05 -122.41 0.02
35 2.0231 8677.91 0.06 -169.20 0.00
36 2.0232 8676.49 -0.14 -169.22 -0.04
37 2.0369 8523.57 0.09 -168.32 0.03
38 2.0423 8454.64 0.03 -168.04 0.03
39 2.2744 3222.37 -0.07 -181.77 0.06
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.
15VT170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.809 43.820 43.800 ecceobj 0.025 0.026 0.024 incobj 1.152 1.152 1.152 qmin 41.660 41.635 41.694 qmax 45.505 45.518 45.411 amean 43.489 43.499 43.479 amin 43.162 43.161 43.149 amax 43.841 43.843 43.822 emean 0.022 0.023 0.021 emin 0.004 0.005 0.003 emax 0.038 0.039 0.037 imean 3.008 3.008 3.009 imin 2.248 2.249 2.250 imax 3.696 3.695 3.696 excite_mean 0.057 0.057 0.057 fracstop 1.000 1.000 1.000 cjmean 3.091 3.092 3.091 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 175.4 175.8 174.6 kozaiamp 180.0 180.0 180.0