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: 17DN170
# Created Sun Dec 22 02:10:58 2024
# Orbit generated from Bernstein formalism
# Fitting 17 observations of 17
# Arc: 3.09y
# First observation: 2016/04/05
# Last observation: 2019/05/09
Preliminary a, adot, b, bdot, g, gdot:
-0.000010 0.006699 -0.000001 0.000270 0.012688 0.000000
# Chi-squared of fit: 5.98 DOF: 28 RMS: 0.10
# Min/Max residuals: -0.30 0.29
# Exact a, adot, b, bdot, g, gdot:
8.166691E-06 6.700018E-03 2.019020E-07 2.701867E-04 1.271507E-02 7.590969E-05
# Covariance matrix:
6.6153E-13 -7.6435E-13 1.0812E-14 -2.4381E-14 -5.1023E-13 -2.7508E-11
-7.6435E-13 1.3493E-12 -2.7348E-14 5.0991E-14 5.9094E-13 5.6734E-11
1.0812E-14 -2.7348E-14 2.3729E-13 -1.1581E-13 -5.3552E-15 -1.2916E-12
-2.4381E-14 5.0991E-14 -1.1581E-13 8.9750E-14 1.9606E-14 2.3284E-12
-5.1023E-13 5.9094E-13 -5.3552E-15 1.9606E-14 7.4600E-13 2.2681E-11
-2.7508E-11 5.6734E-11 -1.2916E-12 2.3284E-12 2.2681E-11 2.5835E-09
# lat0 lon0 xBary yBary zBary JD0
4.748733 -171.867739 -0.133155 0.081881 -0.984114 2457483.957088
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 177.68568 +/- 0.511
Argument of Peri: 245.05603 +/- 0.560
Long of Asc Node: 124.27867 +/- 0.025
Inclination: 5.21716 +/- 0.001
Eccentricity: 0.43367463 +/- 0.0001
Semi-Major Axis: 55.55278453 +/- 0.0095
Time of Perihelion: 2534071.0984 +/- 213.9
Perihelion: 31.46095147 +/- 0.0077
Aphelion: 79.64461758 +/- 0.0147
Period (y) 414.0635 +/- 0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -78.55114120 +/- 0.0053
Ecliptic Y -11.36129560 +/- 0.0008
Ecliptic Z 6.51091949 +/- 0.0004
Ecliptic XDOT 0.00019286 +/- 0.0000
Ecliptic YDOT -0.00143677 +/- 0.0000
Ecliptic ZDOT 0.00005934 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 79.63512350 +/- 0.0052
Geocenter to KBO 78.64682865 +/- 0.0053
# Hcoef: 5.93
The following table shows the complete astrometric record for 17DN170. 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 (17DN170) followed by the observatory code and reference code for the source of the astrometry.
2016 04 05.456299 12 37 21.74 +01 08 20.6 17DN170 T09 C~89UY 2016 04 05.574240 12 37 21.44 +01 08 22.6 17DN170 T09 C~89UY 2017 02 21.50560 12 40 30.10 +00 48 19.6 24.6z 17DN170 T09 C~89UY 2017 02 21.52849 12 40 30.05 +00 48 20.0 24.4z 17DN170 T09 C~89UY 2017 02 21.54193 12 40 30.03 +00 48 20.5 24.4z 17DN170 T09 C~89UY 2017 02 21.57429 12 40 29.96 +00 48 20.6 24.5z 17DN170 T09 C~89UY 2017 02 21.59574 12 40 29.92 +00 48 21.0 24.9z 17DN170 T09 C~89UY 2017 02 21.61448 12 40 29.87 +00 48 21.1 24.8z 17DN170 T09 C~89UY 2017 02 23.62285 12 40 25.93 +00 48 51.7 25.5r 17DN170 T09 C~89UY 2017 02 23.65247 12 40 25.89 +00 48 52.2 25.1r 17DN170 T09 C~89UY 2017 04 02.487842 12 38 56.46 +00 59 13.2 17DN170 T09 C~89UY 2017 04 27.392208 12 37 56.11 +01 05 17.8 17DN170 T09 C~89UY 2017 04 27.417363 12 37 56.05 +01 05 18.1 17DN170 T09 C~89UY 2019 04 03.423840 12 41 48.27 +00 42 50.2 17DN170 T09 C~89UY 2019 04 03.458873 12 41 48.18 +00 42 50.8 17DN170 T09 C~89UY 2019 04 03.482982 12 41 48.12 +00 42 51.2 17DN170 T09 C~89UY 2019 05 09.444077 12 40 24.34 +00 51 02.6 17DN170 T09 C~89UY
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 0.03 0.00 0.03
2 0.0003 -4.92 0.00 0.07 0.15
3 0.8817 3069.90 0.02 9.09 -0.09
4 0.8818 3069.05 -0.07 9.16 -0.06
5 0.8818 3068.58 -0.09 9.50 0.25
6 0.8819 3067.57 -0.02 9.18 -0.14
7 0.8820 3066.86 -0.02 9.31 -0.05
8 0.8820 3066.14 -0.13 9.11 -0.30
9 0.8875 2999.75 0.03 13.94 -0.09
10 0.8876 2999.00 0.29 14.17 0.07
11 0.9912 1521.36 0.05 56.44 0.11
12 1.0594 545.79 -0.04 35.00 0.05
13 1.0594 544.84 -0.07 34.92 0.02
14 2.9924 4277.66 -0.02 168.45 -0.01
15 2.9925 4276.18 -0.03 168.47 0.02
16 2.9925 4275.20 -0.00 168.48 0.04
17 3.0910 2926.23 0.07 124.87 0.02
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.
17DN170 quality flag:3 Type: 5:2EEE 5:2EEE 5:2EEE axisobj 55.122 55.159 55.097 ecceobj 0.445 0.445 0.446 incobj 5.225 5.226 5.225 qmin 30.514 30.494 30.433 qmax 81.707 81.776 81.938 amean 55.462 55.462 55.462 amin 54.770 54.762 54.730 amax 56.375 56.406 56.473 emean 0.439 0.439 0.440 emin 0.430 0.430 0.431 emax 0.450 0.450 0.451 imean 3.732 3.727 3.732 imin 3.659 3.660 3.639 imax 3.799 3.801 3.817 excite_mean 0.444 0.444 0.445 fracstop 1.000 1.000 1.000 cjmean 2.976 2.976 2.975 libcent 0 179.2 179.8 180.1 libamp 0 63.9 68.8 76.6 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 191.6 190.5 191.3 kozaiamp 180.0 180.0 179.9