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: 17DO164
# Created Fri Nov 22 02:10:51 2024
# Orbit generated from Bernstein formalism
# Fitting 22 observations of 23
# Arc: 1.93y
# First observation: 2015/03/30
# Last observation: 2017/03/04
Preliminary a, adot, b, bdot, g, gdot:
-0.000045 0.017423 -0.000001 0.009929 0.022298 0.000000
# Chi-squared of fit: 6.16 DOF: 38 RMS: 0.09
# Min/Max residuals: -0.16 0.25
# Exact a, adot, b, bdot, g, gdot:
1.219624E-05 1.753808E-02 6.727886E-06 1.003253E-02 2.267741E-02 2.591303E-03
# Covariance matrix:
6.9699E-13 -8.4490E-13 6.0056E-14 -2.5716E-13 -3.3744E-13 -1.2360E-11
-8.4490E-13 3.6948E-12 -4.6679E-13 2.0280E-12 3.9198E-12 9.7060E-11
6.0056E-14 -4.6679E-13 6.2074E-13 -5.9279E-13 -5.7189E-13 -1.3415E-11
-2.5716E-13 2.0280E-12 -5.9279E-13 1.4216E-12 2.5010E-12 5.8436E-11
-3.3744E-13 3.9198E-12 -5.7189E-13 2.5010E-12 5.5313E-12 1.1947E-10
-1.2360E-11 9.7060E-11 -1.3415E-11 5.8436E-11 1.1947E-10 2.7947E-09
# lat0 lon0 xBary yBary zBary JD0
2.263196 -173.543723 -0.046988 0.039397 -0.993647 2457111.853967
# Heliocentric elements and errors
Epoch: 2457110.5000 = 2015/03/29
Mean Anomaly: 112.68053 +/- 0.560
Argument of Peri: 237.26614 +/- 0.525
Long of Asc Node: 182.64407 +/- 0.000
Inclination: 29.78859 +/- 0.001
Eccentricity: 0.14864495 +/- 0.0019
Semi-Major Axis: 41.96893916 +/- 0.0177
Time of Perihelion: 2426026.5081 +/- 153.3
Perihelion: 35.73046837 +/- 0.0821
Aphelion: 48.20740995 +/- 0.0833
Period (y) 271.8944 +/- 0.17
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.76883159 +/- 0.0045
Ecliptic Y -5.11326507 +/- 0.0005
Ecliptic Z 1.74169278 +/- 0.0002
Ecliptic XDOT -0.00002832 +/- 0.0000
Ecliptic YDOT -0.00213957 +/- 0.0000
Ecliptic ZDOT 0.00122273 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.09353896 +/- 0.0045
Geocenter to KBO 44.09674388 +/- 0.0046
# Hcoef: 7.85
The following table shows the complete astrometric record for 17DO164. 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 (17DO164) followed by the observatory code and reference code for the source of the astrometry.
2015 03 30.353189 12 27 17.46 -00 29 05.4 17DO164 T09 C~83F2 2015 03 30.392045 12 27 17.29 -00 29 04.1 17DO164 T09 C~83F2 2016 04 04.439690 12 31 29.20 -00 18 09.4 17DO164 T09 C~83F2 2016 04 04.543002 12 31 28.77 -00 18 06.2 17DO164 T09 C~83F2 2016 06 05.314338 12 28 24.29 +00 05 25.2 17DO164 T09 C~83F2 2016 06 05.328496 12 28 24.27 +00 05 25.4 17DO164 T09 C~83F2 2017 01 30.63419 12 39 39.98 -00 42 18.7 23.9z 17DO164 T09 C~81Bw 2017 01 30.65438 12 39 39.93 -00 42 18.0 23.9z 17DO164 T09 C~81Bw 2017 01 30.65709 12 39 39.92 -00 42 18.0 24.0z 17DO164 T09 C~81Bw 2017 01 30.65979 12 39 39.93 -00 42 18.0 24.1z 17DO164 T09 C~81Bw 2017 02 02.65568 12 39 34.52 -00 41 12.8 23.8i 17DO164 T09 C~81Bw 2017 02 02.66205 12 39 34.52 -00 41 12.6 23.7i 17DO164 T09 C~81Bw 2017 02 02.66476 12 39 34.51 -00 41 12.6 24.0i 17DO164 T09 C~81Bw 2017 02 02.66749 12 39 34.50 -00 41 12.5 24.1i 17DO164 T09 C~81Bw 2017 02 23.53862 12 38 40.04 -00 32 02.6 24.8r 17DO164 T09 C~81Bw 2017 02 23.54142 12 38 40.04 -00 32 02.6 24.7r 17DO164 T09 C~81Bw 2017 02 23.56764 12 38 39.95 -00 32 02.0 24.9r 17DO164 T09 C~81Bw 2017 02 23.61010 12 38 39.82 -00 32 00.8 24.5r 17DO164 T09 C~81Bw 2017 02 23.63983 12 38 39.71 -00 31 59.8 24.5r 17DO164 T09 C~81Bw 2017 03 04.53892 12 38 09.00 -00 27 26.1 24.3y 17DO164 T09 C~81Bw 2017 03 04.59319 12 38 08.80 -00 27 24.4 24.4y 17DO164 T09 C~81Bw 2017 03 04.62835 12 38 08.64 -00 27 22.6 24.6y 17DO164 T09 C~81Bw 2017 03 04.63107 12 38 08.66 -00 27 23.1 24.3y 17DO164 T09 C~81Bw
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 0.01 0.00 0.06
2 0.0001 -2.86 -0.07 0.19 0.04
3 1.0160 3209.73 0.01 2095.14 -0.05
4 1.0163 3202.54 0.13 2095.53 -0.15
5 1.1854 102.40 0.02 2298.31 -0.01
6 1.1854 102.04 -0.04 2298.37 0.03
7 1.8406 10555.09 0.20 3674.30 -0.13
8 1.8407 10554.12 -0.11 3674.65 0.03
9 1.8407 10553.98 -0.16 3674.59 -0.05
10 1.8407 10554.12 0.07 3674.65 -0.02
11 1.8489 10453.56 -0.09 3702.52 -0.11
12 1.8489 10453.48 0.06 3702.70 0.02
13 1.8489 10453.35 0.02 3702.64 -0.06
14 1.8489 10453.17 -0.06 3702.68 -0.05
15 1.9061 9483.22 -0.10 3885.24 0.18
16 1.9061 9483.22 0.06 3885.24 0.16
17 1.9061 9481.74 0.08 3885.26 -0.02
18 1.9062 9479.47 0.25 3885.59 -0.02
19 1.9063 9477.56 0.04 3885.86 0.02
20 1.9307 8945.15 -0.12 3955.28 0.02
21 1.9308 8941.72 -0.09 3955.66 0.01
22 1.9309 8938.80 ( -0.77) 3956.37 ( 0.46)
23 1.9309 8939.27 -0.12 3956.03 0.10
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.
17DO164 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.678 41.729 41.630 ecceobj 0.153 0.157 0.149 incobj 29.937 29.937 29.937 qmin 34.583 34.637 34.835 qmax 49.341 49.426 49.050 amean 41.809 41.871 41.804 amin 41.447 41.529 41.456 amax 42.193 42.242 42.187 emean 0.151 0.152 0.146 emin 0.133 0.135 0.128 emax 0.170 0.170 0.164 imean 29.642 29.694 29.675 imin 29.193 29.270 29.256 imax 30.072 30.163 30.127 excite_mean 0.517 0.518 0.516 fracstop 1.000 1.000 1.000 cjmean 2.746 2.745 2.747 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 178.7 178.4 178.1 kozaiamp 179.9 179.9 180.0