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: 17DX165
# Created Tue Apr 1 01:11:04 2025
# Orbit generated from Bernstein formalism
# Fitting 14 observations of 14
# Arc: 3.00y
# First observation: 2016/04/04
# Last observation: 2019/04/03
Preliminary a, adot, b, bdot, g, gdot:
0.000075 0.027429 -0.000000 -0.000569 0.025349 0.000000
# Chi-squared of fit: 4.55 DOF: 22 RMS: 0.10
# Min/Max residuals: -0.17 0.26
# Exact a, adot, b, bdot, g, gdot:
1.670841E-05 2.731459E-02 2.041092E-07 -5.681571E-04 2.592169E-02 -5.843629E-04
# Covariance matrix:
7.3289E-13 -9.8244E-13 -8.6012E-15 1.5690E-14 -2.8484E-13 -8.9213E-12
-9.8244E-13 7.0864E-12 2.5853E-14 -1.3790E-13 -2.9709E-12 8.2046E-11
-8.6012E-15 2.5853E-14 3.0518E-13 -2.2021E-13 -9.4673E-16 3.0620E-13
1.5690E-14 -1.3790E-13 -2.2021E-13 2.4481E-13 5.9276E-14 -1.6528E-12
-2.8484E-13 -2.9709E-12 -9.4673E-16 5.9276E-14 2.3959E-12 -3.6012E-11
-8.9213E-12 8.2046E-11 3.0620E-13 -1.6528E-12 -3.6012E-11 9.8365E-10
# lat0 lon0 xBary yBary zBary JD0
3.159317 -173.254260 -0.139682 0.054491 -0.984826 2457482.940479
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 352.70525 +/- 0.487
Argument of Peri: 120.63922 +/- 0.628
Long of Asc Node: 75.62252 +/- 0.017
Inclination: 3.30633 +/- 0.000
Eccentricity: 0.12048920 +/- 0.0002
Semi-Major Axis: 44.92315297 +/- 0.0196
Time of Perihelion: 2459708.9948 +/- 148.9
Perihelion: 39.51039820 +/- 0.0193
Aphelion: 50.33590773 +/- 0.0236
Period (y) 301.1019 +/- 0.20
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -39.21922548 +/- 0.0023
Ecliptic Y -4.78186372 +/- 0.0003
Ecliptic Z 2.12615554 +/- 0.0001
Ecliptic XDOT 0.00039692 +/- 0.0000
Ecliptic YDOT -0.00286513 +/- 0.0000
Ecliptic ZDOT -0.00006331 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.56683467 +/- 0.0023
Geocenter to KBO 38.57772735 +/- 0.0023
# Hcoef: 8.54
The following table shows the complete astrometric record for 17DX165. 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 (17DX165) followed by the observatory code and reference code for the source of the astrometry.
2016 04 04.439690 12 29 46.19 +00 13 26.8 17DX165 T09 C~83F3 2016 04 04.553662 12 29 45.65 +00 13 30.1 17DX165 T09 C~83F3 2017 01 30.65438 12 39 32.61 -00 53 37.9 24.5z 17DX165 T09 C~83F3 2017 01 30.65709 12 39 32.62 -00 53 38.1 24.5z 17DX165 T09 C~83F3 2017 01 30.65979 12 39 32.61 -00 53 37.9 24.5z 17DX165 T09 C~83F3 2017 02 23.52726 12 38 25.68 -00 45 04.2 25.0r 17DX165 T09 C~83F3 2017 02 23.56764 12 38 25.54 -00 45 03.2 24.8r 17DX165 T09 C~83F3 2017 02 23.61010 12 38 25.38 -00 45 02.0 24.8r 17DX165 T09 C~83F3 2017 02 23.63983 12 38 25.26 -00 45 01.3 24.9r 17DX165 T09 C~83F3 2017 03 04.53892 12 37 50.66 -00 40 58.4 23.3y 17DX165 T09 C~83F3 2017 03 04.59319 12 37 50.42 -00 40 56.9 23.8y 17DX165 T09 C~83F3 2017 03 04.62835 12 37 50.28 -00 40 55.5 23.9y 17DX165 T09 C~83F3 2017 03 04.63107 12 37 50.27 -00 40 55.5 24.1y 17DX165 T09 C~83F3 2019 04 03.445387 12 47 04.24 -01 44 22.4 17DX165 T09 C~83F3
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 -0.11
2 0.0003 -8.74 0.00 -0.17 -0.12
3 0.8247 9677.57 -0.17 -223.41 0.06
4 0.8247 9677.79 0.13 -223.54 -0.07
5 0.8247 9677.57 0.01 -223.41 0.04
6 0.8900 8550.26 -0.04 -147.70 -0.01
7 0.8902 8547.93 0.12 -147.61 0.01
8 0.8903 8545.25 0.06 -147.46 0.08
9 0.8903 8543.32 -0.04 -147.53 -0.04
10 0.9147 7969.70 0.12 -129.27 -0.04
11 0.9149 7965.79 -0.04 -129.32 -0.15
12 0.9150 7963.31 -0.09 -128.86 0.26
13 0.9150 7963.17 -0.05 -128.92 0.20
14 2.9952 17134.11 -0.00 -349.89 -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.
17DX165 quality flag:2 Type: CLASSICAL CLASSICAL 9:5EEEE axisobj 44.402 44.472 44.333 ecceobj 0.110 0.111 0.109 incobj 3.307 3.307 3.307 qmin 38.829 38.858 38.905 qmax 50.747 50.897 50.567 amean 44.635 44.705 44.554 amin 44.255 44.342 44.146 amax 45.040 45.120 44.982 emean 0.110 0.112 0.109 emin 0.093 0.095 0.096 emax 0.127 0.128 0.125 imean 1.646 1.714 1.724 imin 0.887 0.970 0.934 imax 2.309 2.322 2.363 excite_mean 0.113 0.116 0.114 fracstop 1.000 1.000 1.000 cjmean 3.093 3.094 3.092 libcent 0 -180.0 -180.0 180.6 libamp 0 -180.0 -180.0 169.2 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 198.2 188.1 180.7 kozaiamp 179.9 179.9 180.0