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: 16PP220
# Created Wed Dec 25 02:10:40 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 26 observations of 26
# Arc: 6.20y
# First observation: 2016/08/15
# Last observation: 2022/10/29
# Chi-squared of fit: 15.91 DOF: 46 RMS: 0.14
# Min/Max residuals: -0.36 0.28
# Exact a, adot, b, bdot, g, gdot:
1.633816E-05 2.656358E-02 2.378357E-06 2.956674E-03 2.558442E-02 -1.199768E-03
# Covariance matrix:
4.0196E-13 -2.8215E-13 3.0642E-14 -3.3898E-14 4.5397E-14 -1.6607E-12
-2.8215E-13 3.3751E-13 -3.7329E-14 4.1483E-14 1.0272E-13 2.0309E-12
3.0642E-14 -3.7329E-14 1.2827E-13 -4.0470E-14 -9.5932E-15 -2.3999E-13
-3.3898E-14 4.1483E-14 -4.0470E-14 2.4802E-14 1.0883E-14 2.6655E-13
4.5397E-14 1.0272E-13 -9.5932E-15 1.0883E-14 2.1278E-13 5.3109E-13
-1.6607E-12 2.0309E-12 -2.3999E-13 2.6655E-13 5.3109E-13 1.3050E-11
# lat0 lon0 xBary yBary zBary JD0
0.606446 -2.832294 0.571043 0.009029 -0.837706 2457615.763719
# Heliocentric elements and errors
Epoch: 2457616.5000 = 2016/08/16
Mean Anomaly: 333.24534 +/- 0.054
Argument of Peri: 38.95861 +/- 0.071
Long of Asc Node: 351.04736 +/- 0.000
Inclination: 6.40581 +/- 0.000
Eccentricity: 0.11629037 +/- 0.0001
Semi-Major Axis: 44.39076070 +/- 0.0034
Time of Perihelion: 2465644.9955 +/- 19.9
Perihelion: 39.22854294 +/- 0.0044
Aphelion: 49.55297847 +/- 0.0050
Period (y) 295.7652 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 39.84122369 +/- 0.0007
Ecliptic Y -2.54534450 +/- 0.0000
Ecliptic Z 0.41379314 +/- 0.0000
Ecliptic XDOT 0.00001032 +/- 0.0000
Ecliptic YDOT 0.00283869 +/- 0.0000
Ecliptic ZDOT 0.00031500 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.92463044 +/- 0.0007
Geocenter to KBO 39.08633839 +/- 0.0007
# Hcoef: 6.79
The following table shows the complete astrometric record for 16PP220. 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 (16PP220) followed by the observatory code and reference code for the source of the astrometry.
2016 08 15.26293 23 48 38.423 -00 34 10.98 22.4z 16PP220 W84 C~55ZF 2016 10 05.08483 23 44 53.466 -00 56 50.13 22.2z 16PP220 W84 C~55ZF 2016 11 05.05609 23 42 56.730 -01 08 48.98 22.4z 16PP220 W84 C~55ZF 2017 07 30.49131 23 54 47.06 +00 16 05.3 23.9r 16PP220 T09 C~7bNn 2017 07 30.52240 23 54 46.98 +00 16 04.9 23.5r 16PP220 T09 C~7bNn 2017 07 30.55643 23 54 46.89 +00 16 04.2 23.4r 16PP220 T09 C~7bNn 2017 07 30.56498 23 54 46.87 +00 16 04.2 23.6r 16PP220 T09 C~7bNn 2017 09 17.29967 23 51 36.68 -00 02 34.2 22.3i 16PP220 T09 C~7bNn 2017 09 17.34248 23 51 36.48 -00 02 35.6 22.3i 16PP220 T09 C~7bNn 2017 09 17.38284 23 51 36.31 -00 02 36.6 22.3i 16PP220 T09 C~7bNn 2017 09 18.22364 23 51 32.366 -00 03 00.47 21.9i 16PP220 W84 C~55ZF 2017 10 11.19600 23 49 47.256 -00 13 46.79 22.0z 16PP220 W84 C~55ZF 2017 11 15.03240 23 47 48.819 -00 26 02.74 22.8r 16PP220 W84 C~55ZF 2017 11 15.06992 23 47 48.734 -00 26 03.15 23.9g 16PP220 W84 C~55ZF 2017 11 15.07129 23 47 48.734 -00 26 03.26 22.2i 16PP220 W84 C~55ZF 2017 11 17.02214 23 47 44.593 -00 26 28.99 22.6r 16PP220 W84 C~55ZF 2017 11 17.02487 23 47 44.585 -00 26 29.17 23.9g 16PP220 W84 C~55ZF 2017 11 25.04833 23 47 31.006 -00 27 52.65 21.7z 16PP220 W84 C~55ZF 2018 09 11.25017 23 57 27.127 +00 46 18.90 22.6r 16PP220 W84 C~55ZF 2018 09 17.28275 23 56 59.168 +00 43 29.54 22.3i 16PP220 W84 C~55ZF 2018 09 17.28411 23 56 59.151 +00 43 29.42 23.8g 16PP220 W84 C~55ZF 2018 10 01.23177 23 55 53.994 +00 36 50.38 21.8z 16PP220 W84 C~55ZF 2018 11 26.05101 23 52 46.201 +00 17 15.45 22.4Y 16PP220 W84 C~55ZF 2022 10 29.132180 00 15 29.974 +03 28 54.45 22.4G 16PP220 G37 C~5z9S 2022 10 29.170980 00 15 29.792 +03 28 53.54 16PP220 G37 C~5z9S 2022 10 29.208710 00 15 29.674 +03 28 52.69 16PP220 G37 C~5z9S
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 0.06 0.00 -0.10
2 0.1391 0.00 0.07 0.00 0.14
3 0.2239 0.00 0.12 0.00 -0.26
4 0.9561 0.00 0.04 0.00 0.00
5 0.9562 0.00 0.08 0.00 0.03
6 0.9563 0.00 0.08 0.00 -0.19
7 0.9563 0.00 0.12 0.00 -0.07
8 1.0898 0.00 -0.36 0.00 0.28
9 1.0899 0.00 -0.31 0.00 0.10
10 1.0900 0.00 0.02 0.00 0.25
11 1.0923 0.00 -0.02 0.00 0.17
12 1.1552 0.00 0.07 0.00 0.07
13 1.2506 0.00 -0.02 0.00 -0.06
14 1.2507 0.00 -0.01 0.00 0.05
15 1.2507 0.00 0.04 0.00 -0.05
16 1.2560 0.00 -0.03 0.00 -0.12
17 1.2560 0.00 -0.06 0.00 -0.26
18 1.2780 0.00 0.13 0.00 -0.01
19 2.0725 0.00 0.07 0.00 -0.04
20 2.0890 0.00 -0.01 0.00 0.00
21 2.0890 0.00 -0.17 0.00 -0.08
22 2.1272 0.00 0.00 0.00 0.13
23 2.2800 0.00 0.16 0.00 0.12
24 6.2036 0.00 0.12 0.00 -0.09
25 6.2037 0.00 -0.30 0.00 -0.04
26 6.2038 0.00 0.18 0.00 0.05
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.
16PP220 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.859 44.859 44.859 ecceobj 0.125 0.125 0.125 incobj 6.379 6.379 6.379 qmin 38.338 38.330 38.341 qmax 51.380 51.408 51.322 amean 44.661 44.661 44.662 amin 44.284 44.301 44.286 amax 45.079 45.076 45.082 emean 0.122 0.122 0.122 emin 0.105 0.105 0.105 emax 0.140 0.140 0.140 imean 6.711 6.711 6.711 imin 5.922 5.919 5.924 imax 7.503 7.502 7.503 excite_mean 0.169 0.169 0.169 fracstop 1.000 1.000 1.000 cjmean 3.074 3.074 3.074 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 178.6 178.6 178.6 kozaiamp 179.9 179.9 180.0