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: 16PT220
# Created Wed Dec 25 02:10:40 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 18 observations of 18
# Arc: 6.03y
# First observation: 2016/08/14
# Last observation: 2022/08/27
# Chi-squared of fit: 6.39 DOF: 30 RMS: 0.11
# Min/Max residuals: -0.26 0.28
# Exact a, adot, b, bdot, g, gdot:
1.732171E-05 2.722153E-02 -3.120467E-07 1.419606E-03 2.615888E-02 -5.314741E-04
# Covariance matrix:
7.4666E-13 -1.1641E-13 9.0796E-15 -2.3191E-15 6.6246E-13 -7.8823E-14
-1.1641E-13 2.2893E-13 -6.4926E-15 1.1685E-14 7.9342E-14 1.3089E-12
9.0796E-15 -6.4926E-15 1.4477E-13 -3.5018E-14 5.5095E-15 -3.5544E-14
-2.3191E-15 1.1685E-14 -3.5018E-14 1.9731E-14 7.1308E-15 7.4563E-14
6.6246E-13 7.9342E-14 5.5095E-15 7.1308E-15 8.7293E-13 1.0187E-12
-7.8823E-14 1.3089E-12 -3.5544E-14 7.4563E-14 1.0187E-12 8.4887E-12
# lat0 lon0 xBary yBary zBary JD0
5.587965 -14.819824 0.400134 0.090883 -0.927246 2457614.773694
# Heliocentric elements and errors
Epoch: 2457614.5000 = 2016/08/14
Mean Anomaly: 340.01164 +/- 0.070
Argument of Peri: 84.30450 +/- 0.082
Long of Asc Node: 283.77564 +/- 0.002
Inclination: 6.24287 +/- 0.000
Eccentricity: 0.07801196 +/- 0.0001
Semi-Major Axis: 42.21593856 +/- 0.0066
Time of Perihelion: 2463177.2273 +/- 29.5
Perihelion: 38.92259046 +/- 0.0078
Aphelion: 45.50928666 +/- 0.0087
Period (y) 274.2981 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 37.57551382 +/- 0.0013
Ecliptic Y -10.35896017 +/- 0.0004
Ecliptic Z 3.72238933 +/- 0.0001
Ecliptic XDOT 0.00066265 +/- 0.0000
Ecliptic YDOT 0.00276517 +/- 0.0000
Ecliptic ZDOT 0.00014243 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.15462797 +/- 0.0013
Geocenter to KBO 38.22798292 +/- 0.0014
# Hcoef: 7.08
The following table shows the complete astrometric record for 16PT220. 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 (16PT220) followed by the observatory code and reference code for the source of the astrometry.
2016 08 14.272905 22 56 47.56 -00 40 59.0 22.2z 16PT220 W84 C~55ZF 2016 09 26.113750 22 53 29.45 -01 00 45.6 22.9r 16PT220 W84 C~55ZF 2016 09 26.115127 22 53 29.45 -01 00 45.6 22.7i 16PT220 W84 C~55ZF 2016 09 30.101123 22 53 12.37 -01 02 43.0 22.5z 16PT220 W84 C~55ZF 2016 10 29.042975 22 51 34.84 -01 15 15.6 22.8r 16PT220 W84 C~55ZF 2016 10 29.044329 22 51 34.85 -01 15 15.7 22.7i 16PT220 W84 C~55ZF 2016 10 29.04620 22 51 34.855 -01 15 15.43 23.8g 16PT220 W84 C~55ZF 2017 09 27.13168 22 59 03.845 -00 20 41.46 23.3r 16PT220 W84 C~55ZF 2017 09 27.13307 22 59 03.842 -00 20 41.52 22.8i 16PT220 W84 C~55ZF 2017 09 27.13444 22 59 03.836 -00 20 41.70 22.5z 16PT220 W84 C~55ZF 2017 11 08.04221 22 56 49.723 -00 38 26.75 23.4r 16PT220 W84 C~55ZF 2018 09 17.24249 23 05 28.859 +00 24 59.30 23.4r 16PT220 W84 C~55ZF 2018 09 17.24386 23 05 28.848 +00 24 59.25 22.5i 16PT220 W84 C~55ZF 2018 09 19.19611 23 05 19.742 +00 24 00.33 22.7z 16PT220 W84 C~55ZF 2018 11 26.04387 23 02 07.547 -00 02 37.17 22.7z 16PT220 W84 C~55ZF 2022 08 27.258950 23 29 52.564 +03 17 44.80 23.1G 16PT220 G37 C~5nKJ 2022 08 27.305550 23 29 52.356 +03 17 43.41 16PT220 G37 C~5nKJ 2022 08 27.352590 23 29 52.139 +03 17 42.31 16PT220 G37 C~5nKJ
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 -0.26 0.00 0.15
2 0.1173 0.00 0.00 0.00 0.05
3 0.1173 0.00 0.09 0.00 0.09
4 0.1282 0.00 0.28 0.00 -0.11
5 0.2074 0.00 -0.23 0.00 -0.08
6 0.2075 0.00 -0.03 0.00 -0.15
7 0.2075 0.00 0.11 0.00 0.16
8 1.1194 0.00 -0.00 0.00 0.03
9 1.1194 0.00 0.05 0.00 0.01
10 1.1194 0.00 0.05 0.00 -0.12
11 1.2341 0.00 -0.01 0.00 0.02
12 2.0916 0.00 0.07 0.00 -0.00
13 2.0916 0.00 0.00 0.00 -0.01
14 2.0970 0.00 0.03 0.00 -0.02
15 2.2827 0.00 -0.07 0.00 -0.04
16 6.0342 0.00 -0.04 0.00 0.15
17 6.0343 0.00 0.01 0.00 -0.09
18 6.0344 0.00 -0.03 0.00 -0.03
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.
16PT220 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.553 42.553 42.553 ecceobj 0.086 0.086 0.086 incobj 6.251 6.251 6.251 qmin 36.236 36.329 36.369 qmax 48.978 49.060 49.037 amean 42.466 42.466 42.465 amin 42.039 42.071 42.088 amax 42.875 42.889 42.882 emean 0.105 0.104 0.106 emin 0.072 0.070 0.074 emax 0.143 0.144 0.144 imean 7.914 7.920 7.932 imin 6.048 6.065 6.031 imax 9.436 9.438 9.433 excite_mean 0.173 0.173 0.174 fracstop 1.000 1.000 1.000 cjmean 3.047 3.047 3.046 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 180.7 180.8 182.1 kozaiamp 179.9 180.0 180.0