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: 17DZ164
# Created Wed Nov 27 02:10:48 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 25 observations of 25
# Arc: 11.09y
# First observation: 2008/03/04
# Last observation: 2019/04/06
# Chi-squared of fit: 20.34 DOF: 44 RMS: 0.16
# Min/Max residuals: -0.28 0.62
# Exact a, adot, b, bdot, g, gdot:
1.511538E-05 2.161538E-02 9.161132E-07 1.440470E-03 2.286564E-02 3.088557E-03
# Covariance matrix:
7.3277E-13 -1.5803E-13 2.4237E-15 -5.3482E-15 -6.5722E-14 -3.9860E-13
-1.5803E-13 2.0369E-13 -5.9026E-15 1.2988E-14 2.2055E-13 9.6618E-13
2.4237E-15 -5.9026E-15 6.9880E-13 -7.8641E-14 -6.7631E-15 -2.9383E-14
-5.3482E-15 1.2988E-14 -7.8641E-14 1.0493E-14 1.4597E-14 6.4669E-14
-6.5722E-14 2.2055E-13 -6.7631E-15 1.4597E-14 7.1250E-13 1.0722E-12
-3.9860E-13 9.6618E-13 -2.9383E-14 6.4669E-14 1.0722E-12 4.8116E-12
# lat0 lon0 xBary yBary zBary JD0
2.830672 179.562248 0.267268 0.047296 -0.955621 2454530.047107
# Heliocentric elements and errors
Epoch: 2454530.5000 = 2008/03/05
Mean Anomaly: 67.20536 +/- 0.028
Argument of Peri: 313.27189 +/- 0.040
Long of Asc Node: 143.46284 +/- 0.002
Inclination: 4.73270 +/- 0.000
Eccentricity: 0.13758365 +/- 0.0001
Semi-Major Axis: 46.36099600 +/- 0.0059
Time of Perihelion: 2433006.2032 +/- 9.8
Perihelion: 39.98248078 +/- 0.0067
Aphelion: 52.73951122 +/- 0.0080
Period (y) 315.6729 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.63356905 +/- 0.0016
Ecliptic Y 0.60265953 +/- 0.0000
Ecliptic Z 2.15982400 +/- 0.0001
Ecliptic XDOT -0.00037413 +/- 0.0000
Ecliptic YDOT -0.00258533 +/- 0.0000
Ecliptic ZDOT 0.00019041 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.68977167 +/- 0.0016
Geocenter to KBO 43.73367820 +/- 0.0016
# Hcoef: 7.33
The following table shows the complete astrometric record for 17DZ164. 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 (17DZ164) followed by the observatory code and reference code for the source of the astrometry.
2008 03 04.546353 12 02 54.06 +02 46 15.7 17DZ164 T09 C~85Iz 2008 03 05.596737 12 02 49.83 +02 46 45.3 17DZ164 T09 C~85Iz 2016 04 04.44255 12 37 19.91 -00 16 32.5 25.6g 17DZ164 T09 C~8COu 2016 04 04.51521 12 37 19.62 -00 16 30.3 25.9g 17DZ164 T09 C~8COu 2016 04 04.54513 12 37 19.52 -00 16 28.9 26.0g 17DZ164 T09 C~8COu 2016 04 05.452301 12 37 15.77 -00 16 05.4 17DZ164 T09 C~85Iz 2016 04 05.511208 12 37 15.53 -00 16 03.9 17DZ164 T09 C~85Iz 2016 04 05.570256 12 37 15.28 -00 16 02.3 17DZ164 T09 C~85Iz 2017 02 21.48870 12 44 27.32 -00 59 14.6 23.4z 17DZ164 T09 C~81Bx 2017 02 21.51504 12 44 27.25 -00 59 13.8 23.8z 17DZ164 T09 C~81Bx 2017 02 21.53656 12 44 27.17 -00 59 13.4 23.2z 17DZ164 T09 C~81Bx 2017 02 21.55809 12 44 27.11 -00 59 12.9 23.3z 17DZ164 T09 C~81Bx 2017 02 21.56076 12 44 27.12 -00 59 12.9 23.4z 17DZ164 T09 C~81Bx 2017 02 21.58766 12 44 27.03 -00 59 12.4 23.5z 17DZ164 T09 C~81Bx 2017 02 21.60643 12 44 26.96 -00 59 11.7 22.9z 17DZ164 T09 C~81Bx 2017 02 23.53005 12 44 21.05 -00 58 26.4 23.6r 17DZ164 T09 C~81Bx 2017 02 23.56973 12 44 20.92 -00 58 25.5 23.7r 17DZ164 T09 C~81Bx 2017 02 23.60376 12 44 20.82 -00 58 24.7 23.8r 17DZ164 T09 C~81Bx 2017 02 23.64192 12 44 20.71 -00 58 23.7 24.2r 17DZ164 T09 C~81Bx 2017 03 04.54160 12 43 50.87 -00 54 42.6 23.1y 17DZ164 T09 C~81Bx 2017 03 04.58510 12 43 50.71 -00 54 41.6 23.2y 17DZ164 T09 C~81Bx 2017 03 04.63382 12 43 50.54 -00 54 40.4 23.3y 17DZ164 T09 C~81Bx 2017 04 27.380876 12 40 18.69 -00 31 27.7 17DZ164 T09 C~85Iz 2017 04 27.426120 12 40 18.52 -00 31 26.7 17DZ164 T09 C~85Iz 2019 04 06.460461 12 50 33.49 -01 27 57.0 17DZ164 T09 C~85Iz
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 0.0029 0.00 0.01 0.00 -0.06
3 8.0846 0.00 -0.22 0.00 -0.25
4 8.0848 0.00 -0.01 0.00 0.02
5 8.0849 0.00 0.37 0.00 0.62
6 8.0874 0.00 -0.02 0.00 -0.00
7 8.0875 0.00 0.07 0.00 -0.06
8 8.0877 0.00 0.01 0.00 -0.03
9 8.9690 0.00 -0.09 0.00 -0.18
10 8.9691 0.00 0.08 0.00 0.00
11 8.9692 0.00 -0.12 0.00 -0.09
12 8.9692 0.00 -0.02 0.00 -0.09
13 8.9692 0.00 0.25 0.00 -0.16
14 8.9693 0.00 0.15 0.00 -0.28
15 8.9694 0.00 -0.03 0.00 -0.02
16 8.9746 0.00 -0.06 0.00 0.10
17 8.9747 0.00 -0.10 0.00 0.06
18 8.9748 0.00 0.03 0.00 0.05
19 8.9749 0.00 0.21 0.00 0.14
20 8.9993 0.00 -0.24 0.00 0.22
21 8.9994 0.00 -0.27 0.00 0.10
22 8.9996 0.00 -0.18 0.00 0.05
23 9.1467 0.00 0.01 0.00 -0.05
24 9.1468 0.00 -0.03 0.00 -0.03
25 11.0881 0.00 0.05 0.00 -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.
17DZ164 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0