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: 17DA160
# Created Fri Nov 1 01:10:31 2024
# Orbit generated from Bernstein formalism
# Fitting 17 observations of 17
# Arc: 1.06y
# First observation: 2016/04/04
# Last observation: 2017/04/27
Preliminary a, adot, b, bdot, g, gdot:
-0.000002 0.023943 0.000000 -0.000527 0.024307 0.000000
# Chi-squared of fit: 14.70 DOF: 28 RMS: 0.16
# Min/Max residuals: -0.32 0.40
# Exact a, adot, b, bdot, g, gdot:
1.538939E-05 2.398259E-02 7.527946E-08 -5.276835E-04 2.441230E-02 -1.266913E-03
# Covariance matrix:
4.9706E-13 9.7214E-12 5.2509E-15 -2.4061E-13 8.4038E-12 4.3948E-10
9.7214E-12 7.8414E-10 4.1024E-13 -1.8628E-11 6.5556E-10 3.4105E-08
5.2509E-15 4.1024E-13 3.6409E-13 -4.0362E-13 3.4423E-13 1.7869E-11
-2.4061E-13 -1.8628E-11 -4.0362E-13 1.0026E-12 -1.5581E-11 -8.1074E-10
8.4038E-12 6.5556E-10 3.4423E-13 -1.5581E-11 5.4978E-10 2.8550E-08
4.3948E-10 3.4105E-08 1.7869E-11 -8.1074E-10 2.8550E-08 1.4846E-06
# lat0 lon0 xBary yBary zBary JD0
4.843627 -170.436383 -0.091425 0.083888 -0.988422 2457482.963558
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 307.33768 +/- 20.032
Argument of Peri: 163.48661 +/- 25.370
Long of Asc Node: 84.57941 +/- 0.066
Inclination: 4.89740 +/- 0.002
Eccentricity: 0.06057067 +/- 0.0450
Semi-Major Axis: 43.44559407 +/- 0.3114
Time of Perihelion: 2472781.3127 +/- 5817.9
Perihelion: 40.81406516 +/- 1.9776
Aphelion: 46.07712297 +/- 1.9835
Period (y) 286.3695 +/- 3.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.21605458 +/- 0.0387
Ecliptic Y -7.03903356 +/- 0.0065
Ecliptic Z 3.45880819 +/- 0.0033
Ecliptic XDOT 0.00058167 +/- 0.0001
Ecliptic YDOT -0.00263657 +/- 0.0000
Ecliptic ZDOT -0.00007096 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.95562540 +/- 0.0380
Geocenter to KBO 40.96295553 +/- 0.0393
# Hcoef: 8.68
The following table shows the complete astrometric record for 17DA160. 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 (17DA160) followed by the observatory code and reference code for the source of the astrometry.
2016 04 04.462769 12 42 45.50 +00 39 56.3 17DA160 T09 C~81Bu 2016 04 04.560026 12 42 45.05 +00 39 59.1 17DA160 T09 C~81Bu 2016 04 06.484435 12 42 36.44 +00 40 52.2 17DA160 T09 C~81Bu 2016 04 06.605250 12 42 35.90 +00 40 55.5 17DA160 T09 C~81Bu 2017 02 21.53924 12 50 39.02 -00 13 50.7 24.9z 17DA160 T09 C~7ujK 2017 02 21.59034 12 50 38.88 -00 13 50.2 24.6z 17DA160 T09 C~7ujK 2017 02 21.60910 12 50 38.82 -00 13 49.5 24.5z 17DA160 T09 C~7ujK 2017 02 23.54701 12 50 32.52 -00 13 00.5 25.2r 17DA160 T09 C~7ujK 2017 02 23.57183 12 50 32.43 -00 12 59.5 24.8r 17DA160 T09 C~7ujK 2017 02 23.61428 12 50 32.29 -00 12 58.8 25.2r 17DA160 T09 C~7ujK 2017 02 23.64611 12 50 32.17 -00 12 57.9 25.4r 17DA160 T09 C~7ujK 2017 02 23.65665 12 50 32.14 -00 12 57.8 25.5r 17DA160 T09 C~7ujK 2017 03 04.55785 12 50 00.45 -00 09 01.6 24.1y 17DA160 T09 C~7ujK 2017 03 04.59852 12 50 00.29 -00 09 00.4 24.0y 17DA160 T09 C~7ujK 2017 03 04.63649 12 50 00.12 -00 08 59.6 24.3y 17DA160 T09 C~7ujK 2017 04 27.384634 12 46 09.24 +00 15 19.8 17DA160 T09 C~81Bu 2017 04 27.411358 12 46 09.13 +00 15 20.4 17DA160 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 -0.09
2 0.0003 -7.31 -0.10 -0.07 -0.03
3 0.0055 -146.93 -0.02 -1.89 0.04
4 0.0059 -155.67 0.09 -2.03 0.07
5 0.8845 7803.00 -0.28 -181.37 0.23
6 0.8847 7800.86 0.40 -181.74 -0.32
7 0.8847 7799.76 0.32 -181.45 -0.10
8 0.8900 7693.46 0.02 -173.45 0.06
9 0.8901 7691.83 -0.21 -173.06 0.37
10 0.8902 7689.62 -0.01 -173.24 0.04
11 0.8903 7687.61 -0.21 -173.12 0.05
12 0.8903 7687.15 -0.07 -173.20 -0.07
13 0.9147 7156.56 0.13 -142.45 0.01
14 0.9148 7153.88 0.06 -142.28 0.07
15 0.9149 7151.21 -0.16 -142.55 -0.29
16 1.0621 3390.56 0.01 -159.15 -0.02
17 1.0621 3388.81 -0.01 -159.24 -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.
17DA160 quality flag:2 Type: CLASSICAL 9:5EEEE CLASSICAL axisobj 42.972 44.372 42.858 ecceobj 0.055 0.188 0.024 incobj 4.897 4.902 4.896 qmin 40.213 35.616 41.165 qmax 46.359 54.031 45.187 amean 43.202 44.555 43.081 amin 42.870 44.090 42.758 amax 43.560 45.095 43.424 emean 0.045 0.187 0.023 emin 0.025 0.176 0.005 emax 0.065 0.199 0.041 imean 2.875 3.306 3.020 imin 1.981 2.400 2.163 imax 3.738 4.186 3.870 excite_mean 0.068 0.196 0.058 fracstop 1.000 1.000 1.000 cjmean 3.087 3.061 3.087 libcent 0 -180.0 181.1 -180.0 libamp 0 -180.0 112.4 -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 185.0 160.2 188.5 kozaiamp 179.9 180.0 180.0