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: 16PL220 # Created Fri Nov 22 02:10:42 2024 # Orbit generated from Bernstein formalism # Fitting 14 observations of 14 # Arc: 3.06y # First observation: 2015/11/08 # Last observation: 2018/11/29 Preliminary a, adot, b, bdot, g, gdot: -0.000418 0.044690 0.000063 0.002151 0.032612 0.000000 # Chi-squared of fit: 5.45 DOF: 22 RMS: 0.11 # Min/Max residuals: -0.20 0.28 # Exact a, adot, b, bdot, g, gdot: 2.215405E-05 4.375401E-02 6.343974E-07 2.159519E-03 3.173051E-02 -6.866985E-03 # Covariance matrix: 1.2909E-12 -1.6445E-12 5.4938E-14 -8.8863E-14 -3.8290E-13 -9.4296E-12 -1.6445E-12 2.9058E-12 -1.8861E-13 2.0745E-13 2.6308E-13 1.8683E-11 5.4938E-14 -1.8861E-13 3.8023E-13 -2.0700E-13 4.6570E-14 -1.3808E-12 -8.8863E-14 2.0745E-13 -2.0700E-13 1.5648E-13 -9.8847E-15 1.4499E-12 -3.8290E-13 2.6308E-13 4.6570E-14 -9.8847E-15 3.8030E-13 1.1841E-12 -9.4296E-12 1.8683E-11 -1.3808E-12 1.4499E-12 1.1841E-12 1.2712E-10 # lat0 lon0 xBary yBary zBary JD0 -29.287779 -9.391006 -0.808530 -0.282911 -0.504822 2457334.589769 # Heliocentric elements and errors Epoch: 2457330.5000 = 2015/11/04 Mean Anomaly: 355.69571 +/- 0.008 Argument of Peri: 296.89324 +/- 0.039 Long of Asc Node: 74.62420 +/- 0.001 Inclination: 28.98993 +/- 0.000 Eccentricity: 0.58849654 +/- 0.0001 Semi-Major Axis: 76.05822068 +/- 0.0172 Time of Perihelion: 2460227.2879 +/- 5.3 Perihelion: 31.29822127 +/- 0.0105 Aphelion: 120.81822010 +/- 0.0284 Period (y) 663.3266 +/- 0.22 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.81783427 +/- 0.0005 Ecliptic Y -3.78214889 +/- 0.0001 Ecliptic Z -15.41725770 +/- 0.0003 Ecliptic XDOT 0.00019470 +/- 0.0000 Ecliptic YDOT 0.00378746 +/- 0.0000 Ecliptic ZDOT 0.00045241 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 32.02855583 +/- 0.0005 Geocenter to KBO 31.51540715 +/- 0.0006 # Hcoef: 8.66
The following table shows the complete astrometric record for 16PL220. 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 (16PL220) followed by the observatory code and reference code for the source of the astrometry.
2015 11 08.08898 00 17 01.208 -30 21 37.56 23.7i 16PL220 W84 C~55ZE 2016 08 14.38661 00 34 56.659 -28 28 49.14 23.9r 16PL220 W84 C~55ZE 2016 08 14.38798 00 34 56.660 -28 28 49.24 22.7i 16PL220 W84 C~55ZE 2016 08 14.38935 00 34 56.671 -28 28 49.40 24.0g 16PL220 W84 C~55ZE 2016 09 07.27208 00 33 02.675 -28 49 23.86 23.0i 16PL220 W84 C~55ZE 2016 10 28.13524 00 27 53.133 -29 07 15.85 23.7r 16PL220 W84 C~55ZE 2016 11 05.08795 00 27 12.193 -29 05 31.96 23.9i 16PL220 W84 C~55ZE 2016 11 06.22283 00 27 06.774 -29 05 10.88 23.6i 16PL220 W84 C~55ZE 2016 11 06.22419 00 27 06.753 -29 05 10.91 23.6r 16PL220 W84 C~55ZE 2017 09 24.23453 00 41 17.139 -27 37 41.61 23.8r 16PL220 W84 C~55ZE 2017 09 24.23591 00 41 17.144 -27 37 41.56 23.2i 16PL220 W84 C~55ZE 2017 09 26.34959 00 41 03.908 -27 38 49.88 24.1g 16PL220 W84 C~55ZE 2018 11 29.10036 00 45 11.097 -26 10 26.07 24.1r 16PL220 W84 C~55ZE 2018 11 29.10174 00 45 11.108 -26 10 25.89 24.6g 16PL220 W84 C~55ZE
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 -0.07 0.00 0.09
2 0.7674 15610.22 -0.04 -667.14 0.04
3 0.7674 15610.19 0.02 -667.23 -0.02
4 0.7674 15610.24 0.17 -667.44 -0.20
5 0.8328 13688.84 -0.03 -1015.44 -0.07
6 0.9721 9598.14 0.08 -1.87 -0.16
7 0.9938 9174.46 -0.01 344.76 0.28
8 0.9969 9121.82 0.14 397.05 -0.01
9 0.9969 9121.56 -0.05 397.15 0.03
10 1.8786 21552.94 -0.18 -490.64 -0.06
11 1.8786 21553.02 0.03 -490.63 -0.07
12 1.8844 21364.51 -0.16 -461.72 0.12
13 3.0582 26966.23 -0.07 2482.50 0.01
14 3.0582 26966.45 0.18 2482.58 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.
16PL220 quality flag:2 Type: CENTAURS SCATNEAR SCATNEAR axisobj 77.745 77.802 77.688 ecceobj 0.598 0.598 0.597 incobj 29.011 29.011 29.011 qmin 29.654 30.677 30.367 qmax 142.597 125.863 128.235 amean 78.647 76.995 77.537 amin 75.773 75.346 75.651 amax 86.415 79.443 80.643 emean 0.598 0.573 0.585 emin 0.564 0.544 0.563 emax 0.650 0.599 0.608 imean 27.843 29.341 28.597 imin 25.562 27.546 27.057 imax 29.835 30.968 29.874 excite_mean 0.759 0.754 0.756 fracstop 1.000 1.000 1.000 cjmean 2.672 2.676 2.674 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 167.1 142.9 158.0 kozaiamp 180.0 180.0 180.0