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: 17OW166
# Created Sat May 4 01:18:17 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 24 observations of 24
# Arc: 6.14y
# First observation: 2014/06/25
# Last observation: 2020/08/13
# Chi-squared of fit: 0.57 DOF: 42 RMS: 0.03
# Min/Max residuals: -0.06 0.04
# Exact a, adot, b, bdot, g, gdot:
1.336964E-05 1.966232E-02 -2.428883E-07 -1.618222E-04 2.295206E-02 -4.452802E-03
# Covariance matrix:
4.8682E-13 -2.7725E-13 -2.1826E-15 1.8960E-15 -2.3549E-13 -1.6042E-12
-2.7725E-13 2.4565E-13 2.2675E-15 -1.9302E-15 2.7344E-13 1.6426E-12
-2.1826E-15 2.2675E-15 2.6441E-13 -5.0430E-14 3.0156E-15 1.5881E-14
1.8960E-15 -1.9302E-15 -5.0430E-14 1.2364E-14 -1.9512E-15 -1.3662E-14
-2.3549E-13 2.7344E-13 3.0156E-15 -1.9512E-15 8.1243E-13 1.8107E-12
-1.6042E-12 1.6426E-12 1.5881E-14 -1.3662E-14 1.8107E-12 1.1592E-11
# lat0 lon0 xBary yBary zBary JD0
2.337948 -78.827774 0.133942 0.041235 -1.008648 2456833.840208
# Heliocentric elements and errors
Epoch: 2456834.5000 = 2014/06/26
Mean Anomaly: 251.60964 +/- 0.045
Argument of Peri: 234.90270 +/- 0.030
Long of Asc Node: 179.18732 +/- 0.008
Inclination: 2.33456 +/- 0.000
Eccentricity: 0.25829427 +/- 0.0001
Semi-Major Axis: 39.33286814 +/- 0.0055
Time of Perihelion: 2483962.6394 +/- 17.5
Perihelion: 29.17341385 +/- 0.0059
Aphelion: 49.49232244 +/- 0.0081
Period (y) 246.6844 +/- 0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 8.49766355 +/- 0.0003
Ecliptic Y -43.72230247 +/- 0.0017
Ecliptic Z 1.77738930 +/- 0.0001
Ecliptic XDOT 0.00219316 +/- 0.0000
Ecliptic YDOT 0.00097050 +/- 0.0000
Ecliptic ZDOT -0.00004083 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.57601493 +/- 0.0016
Geocenter to KBO 43.56922869 +/- 0.0017
# Hcoef: 8.37
The following table shows the complete astrometric record for 17OW166. 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 (17OW166) followed by the observatory code and reference code for the source of the astrometry.
2014 06 25.33943 18 47 45.434 -20 38 22.17 24.4r 17OW166 266 C~6c3b 2014 06 25.45033 18 47 44.885 -20 38 22.77 24.4r 17OW166 266 C~6c3b 2014 06 25.56643 18 47 44.310 -20 38 23.37 24.4r 17OW166 266 C~6c3b 2016 06 05.49693 18 58 53.814 -20 25 30.45 24.8r 17OW166 266 C~6c3b 2016 06 05.54975 18 58 53.586 -20 25 30.69 24.8r 17OW166 266 C~6c3b 2016 06 05.60261 18 58 53.360 -20 25 30.92 24.8r 17OW166 266 C~6c3b 2017 07 20.27714 19 00 16.355 -20 23 59.84 24.6r 17OW166 266 C~6c3b 2017 07 20.41604 19 00 15.680 -20 24 00.96 24.6r 17OW166 266 C~6c3b 2017 07 20.55184 19 00 15.021 -20 24 02.00 24.6r 17OW166 266 C~6c3b 2017 07 21.26989 19 00 11.627 -20 24 07.68 24.8r 17OW166 266 C~6c3b 2017 07 21.39163 19 00 11.039 -20 24 08.65 24.8r 17OW166 266 C~6c3b 2017 07 21.52175 19 00 10.410 -20 24 09.66 24.8r 17OW166 266 C~6c3b 2020 06 20.45583 19 17 38.844 -19 57 27.45 24.7r 17OW166 266 C~6c3b 2020 06 20.52860 19 17 38.499 -19 57 28.02 24.7r 17OW166 266 C~6c3b 2020 06 20.62233 19 17 38.056 -19 57 28.74 24.7r 17OW166 266 C~6c3b 2020 06 22.44948 19 17 29.508 -19 57 43.27 24.8r 17OW166 266 C~6c3b 2020 06 22.52092 19 17 29.165 -19 57 43.84 24.8r 17OW166 266 C~6c3b 2020 06 22.59118 19 17 28.828 -19 57 44.39 24.8r 17OW166 266 C~6c3b 2020 06 25.44823 19 17 15.250 -19 58 07.89 24.6r 17OW166 266 C~6c3b 2020 06 25.52513 19 17 14.875 -19 58 08.52 24.6r 17OW166 266 C~6c3b 2020 06 25.60088 19 17 14.506 -19 58 09.14 24.6r 17OW166 266 C~6c3b 2020 08 13.24332 19 13 25.264 -20 05 41.83 24.7r 17OW166 266 C~6c3b 2020 08 13.33331 19 13 24.900 -20 05 42.65 24.7r 17OW166 266 C~6c3b 2020 08 13.42301 19 13 24.537 -20 05 43.46 24.7r 17OW166 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 0.04 0.00 0.03
2 0.0003 0.00 0.00 0.00 0.03
3 0.0006 0.00 -0.03 0.00 0.03
4 1.9470 0.00 0.04 0.00 -0.04
5 1.9472 0.00 0.01 0.00 -0.05
6 1.9473 0.00 0.02 0.00 -0.05
7 3.0690 0.00 0.01 0.00 0.01
8 3.0693 0.00 -0.01 0.00 0.00
9 3.0697 0.00 -0.04 0.00 0.00
10 3.0717 0.00 -0.00 0.00 -0.01
11 3.0720 0.00 -0.01 0.00 0.00
12 3.0724 0.00 -0.03 0.00 -0.00
13 5.9880 0.00 -0.03 0.00 0.03
14 5.9882 0.00 -0.03 0.00 0.02
15 5.9885 0.00 -0.03 0.00 0.02
16 5.9935 0.00 -0.03 0.00 0.02
17 5.9937 0.00 -0.03 0.00 0.03
18 5.9938 0.00 -0.03 0.00 0.03
19 6.0017 0.00 0.01 0.00 -0.06
20 6.0019 0.00 0.01 0.00 -0.05
21 6.0021 0.00 0.01 0.00 -0.06
22 6.1353 0.00 -0.00 0.00 0.02
23 6.1355 0.00 0.00 0.00 0.02
24 6.1358 0.00 0.00 0.00 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.
17OW166 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.375 39.375 39.375 ecceobj 0.261 0.261 0.261 incobj 2.335 2.335 2.335 qmin 28.951 28.951 28.951 qmax 50.329 50.332 50.326 amean 39.454 39.454 39.454 amin 39.067 39.067 39.067 amax 39.894 39.891 39.893 emean 0.243 0.243 0.243 emin 0.214 0.214 0.213 emax 0.264 0.264 0.264 imean 4.197 4.200 4.194 imin 2.205 2.207 2.203 imax 7.456 7.449 7.463 excite_mean 0.256 0.256 0.256 fracstop 1.000 1.000 1.000 cjmean 2.976 2.976 2.976 libcent 0 179.5 180.0 179.7 libamp 0 38.5 38.8 39.0 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 144.1 144.0 144.2 kozaiamp 93.3 93.3 93.4