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: 16PN220
# Created Fri Apr 26 01:17:56 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 12 observations of 12
# Arc: 6.03y
# First observation: 2016/08/14
# Last observation: 2022/08/27
# Chi-squared of fit: 1.77 DOF: 18 RMS: 0.07
# Min/Max residuals: -0.12 0.16
# Exact a, adot, b, bdot, g, gdot:
1.455502E-05 2.236479E-02 2.111035E-06 2.088939E-03 2.344525E-02 -3.894307E-03
# Covariance matrix:
9.5825E-13 -1.6981E-13 1.5837E-14 -5.4590E-15 6.4050E-13 -2.2373E-13
-1.6981E-13 6.4086E-13 -4.7703E-14 6.3509E-14 6.0971E-13 4.4464E-12
1.5837E-14 -4.7703E-14 2.8301E-13 -6.7788E-14 -3.8676E-14 -3.3808E-13
-5.4590E-15 6.3509E-14 -6.7788E-14 3.1494E-14 6.9148E-14 4.6306E-13
6.4050E-13 6.0971E-13 -3.8676E-14 6.9148E-14 1.4468E-12 5.0202E-12
-2.2373E-13 4.4464E-12 -3.3808E-13 4.6306E-13 5.0202E-12 3.2551E-11
# lat0 lon0 xBary yBary zBary JD0
4.683169 -13.088765 0.428066 0.075210 -0.916108 2457614.775609
# Heliocentric elements and errors
Epoch: 2457614.5000 = 2016/08/14
Mean Anomaly: 292.25680 +/- 0.038
Argument of Peri: 129.14867 +/- 0.037
Long of Asc Node: 306.02679 +/- 0.002
Inclination: 7.06521 +/- 0.000
Eccentricity: 0.18386917 +/- 0.0003
Semi-Major Axis: 45.29250862 +/- 0.0107
Time of Perihelion: 2478565.3268 +/- 34.0
Perihelion: 36.96461285 +/- 0.0151
Aphelion: 53.62040440 +/- 0.0176
Period (y) 304.8230 +/- 0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 42.20059928 +/- 0.0021
Ecliptic Y -10.25434697 +/- 0.0005
Ecliptic Z 3.48248929 +/- 0.0002
Ecliptic XDOT 0.00013199 +/- 0.0000
Ecliptic YDOT 0.00264400 +/- 0.0000
Ecliptic ZDOT 0.00020597 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.56810955 +/- 0.0021
Geocenter to KBO 42.65270612 +/- 0.0022
# Hcoef: 6.97
The following table shows the complete astrometric record for 16PN220. 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 (16PN220) followed by the observatory code and reference code for the source of the astrometry.
2016 08 14.27482 23 04 33.138 -00 51 07.58 22.8z 16PN220 W84 C~55ZE 2016 09 30.11121 23 01 16.235 -01 10 38.15 22.5z 16PN220 W84 C~55ZE 2017 09 27.13996 23 06 01.682 -00 32 45.71 23.3r 16PN220 W84 C~55ZE 2017 11 09.02547 23 03 51.364 -00 48 53.40 24.5g 16PN220 W84 C~55ZE 2017 11 09.02684 23 03 51.364 -00 48 53.34 23.6r 16PN220 W84 C~55ZE 2017 11 15.04649 23 03 43.025 -00 50 18.78 23.8r 16PN220 W84 C~55ZE 2018 09 18.21024 23 11 15.693 +00 08 12.76 23.1z 16PN220 W84 C~55ZE 2018 10 01.22043 23 10 21.246 +00 02 19.44 22.5i 16PN220 W84 C~55ZE 2018 11 26.04525 23 08 05.946 -00 15 59.55 23.0z 16PN220 W84 C~55ZE 2022 08 27.261260 23 31 40.447 +02 48 16.16 23.4G 16PN220 G37 C~5nKJ 2022 08 27.307870 23 31 40.242 +02 48 14.98 16PN220 G37 C~5nKJ 2022 08 27.354890 23 31 40.051 +02 48 14.09 16PN220 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 0.16 0.00 -0.09
2 0.1282 0.00 -0.07 0.00 0.00
3 1.1194 0.00 -0.04 0.00 -0.00
4 1.2368 0.00 0.01 0.00 -0.05
5 1.2368 0.00 0.04 0.00 0.03
6 1.2533 0.00 -0.02 0.00 0.06
7 2.0943 0.00 -0.11 0.00 0.02
8 2.1299 0.00 -0.03 0.00 0.09
9 2.2827 0.00 0.08 0.00 0.02
10 6.0342 0.00 0.05 0.00 0.01
11 6.0343 0.00 -0.08 0.00 -0.12
12 6.0344 0.00 0.03 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.
16PN220 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 45.726 45.726 45.726 ecceobj 0.188 0.188 0.188 incobj 7.061 7.061 7.061 qmin 35.876 35.814 35.517 qmax 55.522 55.596 56.100 amean 45.494 45.498 45.497 amin 45.049 45.025 45.023 amax 45.991 46.012 46.043 emean 0.190 0.190 0.196 emin 0.169 0.170 0.174 emax 0.210 0.210 0.219 imean 8.242 8.139 7.872 imin 7.185 6.952 6.714 imax 9.411 9.425 9.416 excite_mean 0.238 0.237 0.239 fracstop 1.000 1.000 1.000 cjmean 3.050 3.051 3.049 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 181.8 186.9 181.6 kozaiamp 180.0 180.0 179.9