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: 17OX166
# Created Sun Apr 27 01:11:08 2025
# Orbit generated from Bernstein formalism
# Fitting 24 observations of 24
# Arc: 3.07y
# First observation: 2017/07/20
# Last observation: 2020/08/13
Preliminary a, adot, b, bdot, g, gdot:
-0.000000 0.024914 -0.000000 -0.000570 0.024757 0.000000
# Chi-squared of fit: 0.39 DOF: 42 RMS: 0.02
# Min/Max residuals: -0.05 0.05
# Exact a, adot, b, bdot, g, gdot:
1.580446E-05 2.498898E-02 -3.440760E-07 -5.723133E-04 2.478995E-02 8.476445E-04
# Covariance matrix:
2.8796E-13 5.8316E-12 1.3814E-15 -1.3413E-13 4.7286E-12 7.9248E-11
5.8316E-12 8.1060E-10 1.8943E-13 -1.8382E-11 6.4925E-10 1.0862E-08
1.3814E-15 1.8943E-13 2.4470E-13 -8.7865E-14 1.5179E-13 2.5385E-12
-1.3413E-13 -1.8382E-11 -8.7865E-14 4.5498E-13 -1.4725E-11 -2.4632E-10
4.7286E-12 6.4925E-10 1.5179E-13 -1.4725E-11 5.2065E-10 8.7011E-09
7.9248E-11 1.0862E-08 2.5385E-12 -2.4632E-10 8.7011E-09 1.4555E-07
# lat0 lon0 xBary yBary zBary JD0
2.087911 -77.054758 -0.258886 0.035748 -0.978475 2457954.754051
# Heliocentric elements and errors
Epoch: 2457950.5000 = 2017/07/16
Mean Anomaly: 29.50079 +/- 8.051
Argument of Peri: 88.62637 +/- 9.838
Long of Asc Node: 160.18649 +/- 0.015
Inclination: 2.43304 +/- 0.000
Eccentricity: 0.08014622 +/- 0.0086
Semi-Major Axis: 44.33808895 +/- 0.0093
Time of Perihelion: 2449113.7000 +/- 2411.6
Perihelion: 40.78455888 +/- 0.3812
Aphelion: 47.89161901 +/- 0.3812
Period (y) 295.2390 +/- 0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 9.50033251 +/- 0.0083
Ecliptic Y -40.18892502 +/- 0.0362
Ecliptic Z 1.46971210 +/- 0.0014
Ecliptic XDOT 0.00271572 +/- 0.0000
Ecliptic YDOT 0.00051893 +/- 0.0000
Ecliptic ZDOT -0.00005986 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.32270641 +/- 0.0352
Geocenter to KBO 40.33892641 +/- 0.0371
# Hcoef: 10.24
The following table shows the complete astrometric record for 17OX166. 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 (17OX166) followed by the observatory code and reference code for the source of the astrometry.
2017 07 20.25325 18 55 23.844 -20 43 52.20 26.0r 17OX166 266 C~6c3b 2017 07 20.39364 18 55 23.141 -20 43 53.31 26.0r 17OX166 266 C~6c3b 2017 07 20.53088 18 55 22.454 -20 43 54.35 26.0r 17OX166 266 C~6c3b 2017 07 21.24888 18 55 18.945 -20 43 59.92 26.2r 17OX166 266 C~6c3b 2017 07 21.40987 18 55 18.143 -20 44 01.19 26.2r 17OX166 266 C~6c3b 2017 07 21.54551 18 55 17.468 -20 44 02.21 26.2r 17OX166 266 C~6c3b 2020 05 28.44674 19 17 45.985 -20 14 27.71 26.0r 17OX166 266 C~6c3b 2020 05 28.50129 19 17 45.786 -20 14 28.00 26.0r 17OX166 266 C~6c3b 2020 05 28.55756 19 17 45.580 -20 14 28.29 26.0r 17OX166 266 C~6c3b 2020 05 30.43935 19 17 38.734 -20 14 38.15 26.4r 17OX166 266 C~6c3b 2020 05 30.53044 19 17 38.388 -20 14 38.66 26.4r 17OX166 266 C~6c3b 2020 05 30.61862 19 17 38.053 -20 14 39.14 26.4r 17OX166 266 C~6c3b 2020 06 20.45583 19 16 08.480 -20 17 03.18 26.4r 17OX166 266 C~6c3b 2020 06 20.52860 19 16 08.126 -20 17 03.77 26.4r 17OX166 266 C~6c3b 2020 06 20.62233 19 16 07.671 -20 17 04.52 26.4r 17OX166 266 C~6c3b 2020 06 22.44948 19 15 58.907 -20 17 19.69 26.4r 17OX166 266 C~6c3b 2020 06 22.52092 19 15 58.555 -20 17 20.29 26.4r 17OX166 266 C~6c3b 2020 06 22.59118 19 15 58.210 -20 17 20.87 26.4r 17OX166 266 C~6c3b 2020 06 25.44823 19 15 44.276 -20 17 45.24 26.6r 17OX166 266 C~6c3b 2020 06 25.53072 19 15 43.862 -20 17 45.95 26.6r 17OX166 266 C~6c3b 2020 06 25.61487 19 15 43.442 -20 17 46.66 26.6r 17OX166 266 C~6c3b 2020 08 13.24332 19 11 49.454 -20 25 27.48 26.6r 17OX166 266 C~6c3b 2020 08 13.33331 19 11 49.086 -20 25 28.30 26.6r 17OX166 266 C~6c3b 2020 08 13.42301 19 11 48.718 -20 25 29.10 26.6r 17OX166 266 C~6c3b
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 0.03 0.00 -0.00
2 0.0004 -9.92 0.03 -0.17 -0.00
3 0.0008 -19.62 0.03 -0.28 -0.00
4 0.0027 -69.15 -0.03 -1.14 0.00
5 0.0032 -80.47 -0.03 -1.33 0.00
6 0.0035 -89.99 -0.04 -1.45 0.01
7 2.8561 18990.15 -0.03 -366.52 -0.04
8 2.8563 18987.31 -0.02 -366.45 -0.05
9 2.8564 18984.37 -0.02 -366.36 -0.04
10 2.8616 18886.74 0.02 -363.68 0.00
11 2.8618 18881.81 0.01 -363.55 0.00
12 2.8621 18877.03 0.02 -363.42 -0.01
13 2.9191 17598.60 -0.02 -344.86 0.02
14 2.9193 17593.55 -0.02 -344.81 0.02
15 2.9196 17587.06 -0.02 -344.75 0.02
16 2.9246 17461.93 0.04 -344.16 0.01
17 2.9248 17456.90 0.04 -344.13 0.01
18 2.9249 17451.98 0.05 -344.09 0.01
19 2.9328 17253.04 -0.00 -343.47 0.02
20 2.9330 17247.13 -0.01 -343.44 0.02
21 2.9332 17241.14 -0.01 -343.40 0.02
22 3.0664 13899.89 -0.01 -395.03 -0.00
23 3.0666 13894.63 0.00 -395.22 -0.00
24 3.0669 13889.38 -0.01 -395.39 -0.00
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.
17OX166 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.947 44.090 43.912 ecceobj 0.071 0.100 0.062 incobj 2.429 2.428 2.430 qmin 40.336 39.187 40.691 qmax 48.272 49.801 47.831 amean 44.189 44.345 44.147 amin 43.841 43.986 43.797 amax 44.551 44.741 44.512 emean 0.068 0.097 0.059 emin 0.052 0.081 0.043 emax 0.084 0.113 0.075 imean 2.576 2.584 2.581 imin 1.924 1.904 1.926 imax 3.220 3.276 3.218 excite_mean 0.082 0.108 0.075 fracstop 1.000 1.000 1.000 cjmean 3.096 3.092 3.097 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 173.3 173.2 173.2 kozaiamp 180.0 180.0 179.9