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: 16PO220
# Created Fri Apr 19 01:18:10 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 22 observations of 22
# Arc: 6.03y
# First observation: 2016/08/15
# Last observation: 2022/08/27
# Chi-squared of fit: 6.20 DOF: 38 RMS: 0.09
# Min/Max residuals: -0.24 0.21
# Exact a, adot, b, bdot, g, gdot:
1.452649E-05 2.123811E-02 7.699636E-06 1.153246E-02 2.461004E-02 -3.691448E-04
# Covariance matrix:
6.3536E-13 -7.4505E-14 -5.2661E-15 8.5396E-15 5.7569E-13 1.3678E-13
-7.4505E-14 1.1140E-13 -3.2070E-14 5.5183E-14 2.8564E-14 8.1062E-13
-5.2661E-15 -3.2070E-14 1.3397E-13 -5.0775E-14 -3.3739E-14 -2.9576E-13
8.5396E-15 5.5183E-14 -5.0775E-14 5.1360E-14 5.7431E-14 5.0837E-13
5.7569E-13 2.8564E-14 -3.3739E-14 5.7431E-14 7.1247E-13 8.5718E-13
1.3678E-13 8.1062E-13 -2.9576E-13 5.0837E-13 8.5718E-13 7.4795E-12
# lat0 lon0 xBary yBary zBary JD0
1.507896 -4.542183 0.545893 0.022643 -0.854057 2457615.756729
# Heliocentric elements and errors
Epoch: 2457616.5000 = 2016/08/16
Mean Anomaly: 290.56005 +/- 0.191
Argument of Peri: 75.56298 +/- 0.207
Long of Asc Node: 351.99245 +/- 0.000
Inclination: 28.63218 +/- 0.000
Eccentricity: 0.02796460 +/- 0.0001
Semi-Major Axis: 41.87013253 +/- 0.0057
Time of Perihelion: 2476704.5622 +/- 55.0
Perihelion: 40.69925101 +/- 0.0074
Aphelion: 43.04101404 +/- 0.0076
Period (y) 270.9347 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 41.29699669 +/- 0.0014
Ecliptic Y -3.83104013 +/- 0.0001
Ecliptic Z 1.06958101 +/- 0.0000
Ecliptic XDOT 0.00011396 +/- 0.0000
Ecliptic YDOT 0.00235425 +/- 0.0000
Ecliptic ZDOT 0.00128143 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.48812100 +/- 0.0014
Geocenter to KBO 40.63386855 +/- 0.0014
# Hcoef: 7.06
The following table shows the complete astrometric record for 16PO220. 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 (16PO220) followed by the observatory code and reference code for the source of the astrometry.
2016 08 15.25594 23 40 55.937 -00 25 15.44 22.6z 16PO220 W84 C~55ZE 2016 09 30.09716 23 37 26.935 -00 42 04.01 23.1r 16PO220 W84 C~55ZE 2016 09 30.09852 23 37 26.929 -00 42 03.82 23.1i 16PO220 W84 C~55ZE 2016 09 30.09989 23 37 26.930 -00 42 04.04 23.9g 16PO220 W84 C~55ZE 2016 10 05.08483 23 37 04.145 -00 43 59.42 22.7z 16PO220 W84 C~55ZE 2016 10 05.14856 23 37 03.856 -00 44 00.97 23.2i 16PO220 W84 C~55ZE 2016 10 05.14994 23 37 03.845 -00 44 00.93 23.0r 16PO220 W84 C~55ZE 2016 10 05.15132 23 37 03.829 -00 44 01.04 24.0g 16PO220 W84 C~55ZF 2016 11 05.05332 23 35 06.687 -00 53 45.50 22.8z 16PO220 W84 C~55ZF 2017 09 27.14836 23 41 07.144 +00 24 42.67 22.5z 16PO220 W84 C~55ZF 2017 11 15.06304 23 38 05.241 +00 09 11.05 23.7g 16PO220 W84 C~55ZF 2017 11 15.06581 23 38 05.242 +00 09 10.96 22.9i 16PO220 W84 C~55ZF 2017 11 25.04539 23 37 47.621 +00 07 52.89 22.6z 16PO220 W84 C~55ZF 2018 09 17.27023 23 45 21.296 +01 34 24.08 23.2i 16PO220 W84 C~55ZF 2018 09 17.27161 23 45 21.287 +01 34 24.11 22.7r 16PO220 W84 C~55ZF 2018 09 17.27297 23 45 21.285 +01 34 24.20 23.7g 16PO220 W84 C~55ZF 2019 09 27.27499 23 48 01.57 +02 36 13.5 24.3g 16PO220 T09 C~7bNn 2019 09 27.46365 23 48 00.65 +02 36 08.6 23.7g 16PO220 T09 C~7bNn 2019 09 27.47634 23 48 00.58 +02 36 08.4 23.9g 16PO220 T09 C~7bNn 2022 08 27.392170 00 00 50.423 +06 04 39.97 23.1G 16PO220 G37 C~5nKJ 2022 08 27.426000 00 00 50.279 +06 04 39.35 16PO220 G37 C~5nKJ 2022 08 27.461380 00 00 50.118 +06 04 38.83 16PO220 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 -0.14 0.00 -0.13
2 0.1255 0.00 0.01 0.00 -0.06
3 0.1255 0.00 0.02 0.00 0.16
4 0.1255 0.00 0.13 0.00 -0.03
5 0.1392 0.00 0.08 0.00 0.09
6 0.1393 0.00 0.12 0.00 -0.00
7 0.1393 0.00 0.05 0.00 0.07
8 0.1393 0.00 -0.09 0.00 -0.01
9 0.2239 0.00 -0.03 0.00 -0.07
10 1.1167 0.00 0.14 0.00 -0.11
11 1.2507 0.00 -0.07 0.00 0.08
12 1.2507 0.00 0.04 0.00 0.02
13 1.2780 0.00 -0.24 0.00 0.08
14 2.0890 0.00 0.00 0.00 -0.13
15 2.0890 0.00 -0.03 0.00 -0.07
16 2.0890 0.00 0.04 0.00 0.05
17 3.1157 0.00 0.15 0.00 0.21
18 3.1162 0.00 0.01 0.00 -0.08
19 3.1163 0.00 -0.12 0.00 0.03
20 6.0319 0.00 0.02 0.00 0.01
21 6.0320 0.00 0.04 0.00 -0.06
22 6.0320 0.00 -0.08 0.00 -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.
16PO220 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 42.201 42.201 42.201 ecceobj 0.033 0.033 0.033 incobj 28.501 28.501 28.501 qmin 40.225 40.225 40.223 qmax 44.084 44.085 44.082 amean 42.068 42.067 42.068 amin 41.755 41.756 41.754 amax 42.399 42.400 42.398 emean 0.029 0.029 0.029 emin 0.018 0.018 0.018 emax 0.040 0.040 0.040 imean 29.134 29.134 29.134 imin 28.831 28.830 28.829 imax 29.408 29.410 29.405 excite_mean 0.488 0.488 0.488 fracstop 1.000 1.000 1.000 cjmean 2.779 2.779 2.779 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 183.6 183.4 183.5 kozaiamp 179.9 180.0 179.9