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: 17DN160
# Created Mon Apr 28 01:11:05 2025
# Orbit generated from Bernstein formalism
# Fitting 13 observations of 13
# Arc: 3.00y
# First observation: 2016/04/04
# Last observation: 2019/04/06
Preliminary a, adot, b, bdot, g, gdot:
-0.000095 0.020679 -0.000002 0.000032 0.022243 0.000000
# Chi-squared of fit: 3.74 DOF: 20 RMS: 0.09
# Min/Max residuals: -0.24 0.24
# Exact a, adot, b, bdot, g, gdot:
1.439129E-05 2.054993E-02 -1.498646E-07 2.989330E-05 2.237965E-02 -1.421107E-03
# Covariance matrix:
7.3288E-13 -9.6607E-13 -4.4801E-16 -1.0007E-15 -3.3135E-13 -1.1668E-11
-9.6607E-13 1.9159E-12 -5.3093E-15 3.5519E-15 2.0821E-13 2.6426E-11
-4.4801E-16 -5.3093E-15 2.9541E-13 -1.6340E-13 8.5860E-15 -9.1726E-14
-1.0007E-15 3.5519E-15 -1.6340E-13 1.4646E-13 -1.5507E-15 5.5703E-14
-3.3135E-13 2.0821E-13 8.5860E-15 -1.5507E-15 7.8838E-13 2.0782E-12
-1.1668E-11 2.6426E-11 -9.1726E-14 5.5703E-14 2.0782E-12 3.9605E-10
# lat0 lon0 xBary yBary zBary JD0
5.315786 -170.243394 -0.088083 0.092059 -0.987999 2457482.963558
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 261.51291 +/- 0.175
Argument of Peri: 195.37486 +/- 0.161
Long of Asc Node: 100.56314 +/- 0.012
Inclination: 5.20040 +/- 0.000
Eccentricity: 0.06796886 +/- 0.0009
Semi-Major Axis: 45.02457870 +/- 0.0068
Time of Perihelion: 2487669.5675 +/- 53.2
Perihelion: 41.96430954 +/- 0.0427
Aphelion: 48.08484785 +/- 0.0428
Period (y) 302.1222 +/- 0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.81443113 +/- 0.0017
Ecliptic Y -7.79728757 +/- 0.0003
Ecliptic Z 4.13972032 +/- 0.0002
Ecliptic XDOT 0.00059709 +/- 0.0000
Ecliptic YDOT -0.00245524 +/- 0.0000
Ecliptic ZDOT -0.00001246 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.67568517 +/- 0.0017
Geocenter to KBO 44.68344227 +/- 0.0018
# Hcoef: 7.07
The following table shows the complete astrometric record for 17DN160. 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 (17DN160) followed by the observatory code and reference code for the source of the astrometry.
2016 04 04.462769 12 44 12.39 +01 01 28.5 17DN160 T09 C~81Bu 2016 04 04.530127 12 44 12.10 +01 01 30.2 17DN160 T09 C~81Bu 2017 02 21.50220 12 51 12.90 +00 15 09.3 23.4z 17DN160 T09 C~7xU0 2017 02 21.52305 12 51 12.84 +00 15 10.3 23.7z 17DN160 T09 C~7xU0 2017 02 21.52572 12 51 12.84 +00 15 10.1 23.4z 17DN160 T09 C~7xU0 2017 02 23.58243 12 51 06.64 +00 15 59.5 23.7r 17DN160 T09 C~7xU0 2017 02 23.61428 12 51 06.55 +00 16 00.4 23.7r 17DN160 T09 C~7xU0 2017 03 06.641649 12 50 29.61 +00 20 41.1 17DN160 T09 C~81Bu 2017 03 25.267116 12 49 17.018 +00 29 05.60 23.5V 17DN160 W84 C~8HKV 2017 04 27.399658 12 47 02.69 +00 42 39.3 17DN160 T09 C~81Bu 2017 04 27.420264 12 47 02.61 +00 42 39.7 17DN160 T09 C~81Bu 2019 04 06.405562 12 57 12.99 -00 21 24.1 17DN160 T09 C~81Bu 2019 04 06.473958 12 57 12.69 -00 21 22.2 17DN160 T09 C~81Bu
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 0.04
2 0.0002 -4.67 -0.03 -0.14 -0.04
3 0.8844 6894.45 -0.01 -82.31 -0.24
4 0.8845 6893.23 -0.16 -81.74 0.24
5 0.8845 6893.31 0.05 -81.93 0.05
6 0.8901 6788.27 0.01 -72.98 -0.07
7 0.8902 6786.67 0.10 -72.68 0.11
8 0.9204 6166.26 0.10 -31.89 -0.01
9 0.9714 4965.90 -0.16 4.93 -0.01
10 1.0621 2792.60 0.03 -37.04 -0.02
11 1.0622 2791.34 0.02 -37.14 -0.05
12 3.0033 12736.83 0.08 19.90 -0.03
13 3.0035 12731.93 -0.08 19.88 0.03
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.
17DN160 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.539 44.559 44.520 ecceobj 0.071 0.071 0.072 incobj 5.199 5.199 5.199 qmin 41.008 41.057 40.961 qmax 48.813 48.808 48.789 amean 44.792 44.811 44.772 amin 44.438 44.460 44.417 amax 45.172 45.194 45.149 emean 0.067 0.067 0.068 emin 0.052 0.052 0.053 emax 0.081 0.080 0.081 imean 3.423 3.424 3.421 imin 2.931 2.933 2.924 imax 3.986 3.982 3.987 excite_mean 0.090 0.090 0.091 fracstop 1.000 1.000 1.000 cjmean 3.101 3.102 3.101 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 179.7 180.0 179.8 kozaiamp 180.0 180.0 179.9