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: 17DH160
# Created Fri Nov 1 01:10:31 2024
# Orbit generated from Bernstein formalism
# Fitting 24 observations of 24
# Arc: 3.00y
# First observation: 2016/04/04
# Last observation: 2019/04/06
Preliminary a, adot, b, bdot, g, gdot:
-0.000162 0.029118 -0.000013 0.001222 0.027698 0.000000
# Chi-squared of fit: 11.35 DOF: 42 RMS: 0.12
# Min/Max residuals: -0.37 0.24
# Exact a, adot, b, bdot, g, gdot:
1.626473E-05 2.882108E-02 4.248792E-07 1.204959E-03 2.798058E-02 -2.299235E-03
# Covariance matrix:
2.9307E-13 -3.8604E-13 5.4155E-15 -1.3108E-14 -1.2158E-13 -3.3094E-12
-3.8604E-13 9.2439E-13 -1.8776E-14 3.7643E-14 -9.1858E-15 9.3246E-12
5.4155E-15 -1.8776E-14 1.4390E-13 -7.0645E-14 5.5078E-15 -2.0653E-13
-1.3108E-14 3.7643E-14 -7.0645E-14 6.0785E-14 -2.7842E-15 4.0755E-13
-1.2158E-13 -9.1858E-15 5.5078E-15 -2.7842E-15 4.5847E-13 -4.6104E-13
-3.3094E-12 9.3246E-12 -2.0653E-13 4.0755E-13 -4.6104E-13 1.0077E-10
# lat0 lon0 xBary yBary zBary JD0
5.149979 -170.530453 -0.093053 0.089158 -0.987809 2457482.963558
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 274.34947 +/- 0.073
Argument of Peri: 159.22546 +/- 0.061
Long of Asc Node: 124.89809 +/- 0.005
Inclination: 5.53812 +/- 0.000
Eccentricity: 0.07642772 +/- 0.0003
Semi-Major Axis: 36.73025398 +/- 0.0035
Time of Perihelion: 2476825.1954 +/- 16.3
Perihelion: 33.92304448 +/- 0.0131
Aphelion: 39.53746348 +/- 0.0133
Period (y) 222.6097 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -36.07642495 +/- 0.0008
Ecliptic Y -6.11377256 +/- 0.0001
Ecliptic Z 3.20809790 +/- 0.0001
Ecliptic XDOT 0.00069555 +/- 0.0000
Ecliptic YDOT -0.00275004 +/- 0.0000
Ecliptic ZDOT 0.00009724 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 36.73116584 +/- 0.0008
Geocenter to KBO 35.73906948 +/- 0.0009
# Hcoef: 8.69
The following table shows the complete astrometric record for 17DH160. 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 (17DH160) followed by the observatory code and reference code for the source of the astrometry.
2016 04 04.462769 12 42 53.66 +00 59 03.1 17DH160 T09 C~81Bu 2016 04 04.482759 12 42 53.55 +00 59 03.7 17DH160 T09 C~81Bu 2016 04 04.495674 12 42 53.49 +00 59 04.1 17DH160 T09 C~81Bu 2016 04 04.528005 12 42 53.32 +00 59 05.1 17DH160 T09 C~81Bu 2016 04 04.560026 12 42 53.16 +00 59 06.2 17DH160 T09 C~81Bu 2017 02 21.50220 12 52 20.00 +00 00 41.5 24.6z 17DH160 T09 C~7xTz 2017 02 21.52572 12 52 19.89 +00 00 42.4 24.2z 17DH160 T09 C~7xTz 2017 02 21.54727 12 52 19.83 +00 00 42.9 23.8z 17DH160 T09 C~7xTz 2017 02 21.61177 12 52 19.59 +00 00 44.7 23.9z 17DH160 T09 C~7xTz 2017 02 21.61983 12 52 19.56 +00 00 45.2 24.1z 17DH160 T09 C~7xTz 2017 02 23.54701 12 52 12.59 +00 01 42.2 24.8r 17DH160 T09 C~7xTz 2017 02 23.58243 12 52 12.46 +00 01 43.2 24.7r 17DH160 T09 C~7xTz 2017 02 23.61428 12 52 12.34 +00 01 44.3 24.4r 17DH160 T09 C~7xTz 2017 02 23.64611 12 52 12.22 +00 01 45.5 25.3r 17DH160 T09 C~7xTz 2017 03 25.267116 12 49 59.434 +00 17 59.28 24.3V 17DH160 W84 C~8HKV 2017 03 25.273819 12 49 59.395 +00 17 59.35 24.3V 17DH160 W84 C~8HKV 2017 04 27.39967 12 47 15.51 +00 34 55.5 23.9i 17DH160 T09 C~81Bu 2017 04 27.41137 12 47 15.47 +00 34 55.7 23.9i 17DH160 T09 C~81Bu 2017 04 27.42027 12 47 15.42 +00 34 55.9 23.7i 17DH160 T09 C~81Bu 2019 04 06.37036 13 01 30.92 -00 46 32.2 23.8i 17DH160 T09 C~81Bu 2019 04 06.40557 13 01 30.73 -00 46 30.7 23.6i 17DH160 T09 C~81Bu 2019 04 06.45208 13 01 30.49 -00 46 29.3 23.5i 17DH160 T09 C~81Bu 2019 04 06.46582 13 01 30.40 -00 46 29.3 23.7i 17DH160 T09 C~81Bu 2019 04 06.51779 13 01 30.13 -00 46 27.2 24.3i 17DH160 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 0.00 0.00 0.05
2 0.0001 -1.75 -0.07 -0.10 -0.03
3 0.0001 -2.74 0.03 -0.08 -0.01
4 0.0002 -5.48 0.00 -0.16 -0.07
5 0.0003 -8.11 0.04 -0.09 0.01
6 0.8844 9193.44 0.23 114.96 0.03
7 0.8845 9191.56 -0.19 115.14 0.07
8 0.8846 9190.54 0.12 115.25 0.06
9 0.8847 9186.51 0.08 115.49 -0.06
10 0.8848 9185.90 -0.03 115.77 0.18
11 0.8900 9067.13 -0.01 127.14 -0.11
12 0.8901 9064.94 0.07 127.29 -0.15
13 0.8902 9062.85 0.02 127.60 -0.01
14 0.8903 9060.72 -0.07 128.00 0.21
15 0.9714 6843.23 -0.20 241.32 0.02
16 0.9714 6842.66 -0.21 241.15 -0.15
17 1.0621 4180.96 -0.06 210.29 0.02
18 1.0621 4180.33 0.18 210.24 0.01
19 1.0622 4179.56 0.07 210.13 -0.06
20 3.0032 17945.01 0.19 755.98 -0.05
21 3.0033 17941.78 -0.03 756.24 0.24
22 3.0034 17937.89 0.05 756.12 0.15
23 3.0034 17936.64 -0.03 755.58 -0.37
24 3.0036 17932.06 -0.18 755.93 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.
17DH160 quality flag:3 Type: 4:3E 4:3E 4:3E axisobj 36.383 36.394 36.371 ecceobj 0.077 0.076 0.077 incobj 5.544 5.544 5.544 qmin 32.871 32.902 32.805 qmax 40.414 40.431 40.632 amean 36.482 36.483 36.482 amin 36.132 36.134 36.152 amax 36.839 36.849 36.847 emean 0.078 0.076 0.079 emin 0.057 0.054 0.060 emax 0.098 0.097 0.103 imean 4.729 4.256 5.075 imin 1.723 1.831 1.621 imax 6.868 6.557 7.270 excite_mean 0.115 0.109 0.121 fracstop 1.000 1.000 1.000 cjmean 3.013 3.014 3.011 libcent 0 181.8 179.1 180.8 libamp 0 67.9 74.7 63.0 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 179.2 179.8 179.0 kozaiamp 180.0 180.0 179.9