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: 17DM171
# Created Sun Nov 24 02:10:50 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 23 observations of 23
# Arc: 15.01y
# First observation: 2004/03/29
# Last observation: 2019/04/03
# Chi-squared of fit: 10.81 DOF: 40 RMS: 0.12
# Min/Max residuals: -0.31 0.27
# Exact a, adot, b, bdot, g, gdot:
1.460032E-05 2.273291E-02 5.513203E-07 -3.298273E-04 2.371969E-02 -4.876450E-04
# Covariance matrix:
7.3168E-13 -1.1444E-13 -8.0294E-16 8.8476E-16 -5.5453E-14 -1.8819E-13
-1.1444E-13 7.9737E-14 7.8673E-16 -1.0663E-15 1.7019E-14 2.2388E-13
-8.0294E-16 7.8673E-16 6.7466E-13 -5.2332E-14 1.2785E-15 2.4322E-15
8.8476E-16 -1.0663E-15 -5.2332E-14 4.4592E-15 -2.7713E-16 -3.1737E-15
-5.5453E-14 1.7019E-14 1.2785E-15 -2.7713E-16 3.0001E-13 7.5610E-14
-1.8819E-13 2.2388E-13 2.4322E-15 -3.1737E-15 7.5610E-14 6.6780E-13
# lat0 lon0 xBary yBary zBary JD0
4.530146 170.565331 -0.318657 0.074525 -0.939932 2453093.992346
# Heliocentric elements and errors
Epoch: 2453094.5000 = 2004/03/30
Mean Anomaly: 305.55688 +/- 0.223
Argument of Peri: 156.97425 +/- 0.231
Long of Asc Node: 69.93862 +/- 0.002
Inclination: 4.51402 +/- 0.000
Eccentricity: 0.01603758 +/- 0.0000
Semi-Major Axis: 43.50248476 +/- 0.0040
Time of Perihelion: 2468943.7986 +/- 66.0
Perihelion: 42.80481009 +/- 0.0045
Aphelion: 44.20015943 +/- 0.0046
Period (y) 286.9322 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -42.44508291 +/- 0.0010
Ecliptic Y 6.73110750 +/- 0.0002
Ecliptic Z 3.32991861 +/- 0.0001
Ecliptic XDOT -0.00038107 +/- 0.0000
Ecliptic YDOT -0.00260401 +/- 0.0000
Ecliptic ZDOT -0.00004226 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.10431481 +/- 0.0009
Geocenter to KBO 42.15911954 +/- 0.0010
# Hcoef: 7.28
The following table shows the complete astrometric record for 17DM171. 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 (17DM171) followed by the observatory code and reference code for the source of the astrometry.
2004 03 29.491603 11 32 30.82 +07 54 04.7 17DM171 T14 C~89Ua 2004 03 29.508065 11 32 30.74 +07 54 05.4 17DM171 T14 C~89Ua 2013 02 03.345483 12 18 55.054 +02 34 18.26 22.5z 17DM171 W84 C~8HKW 2016 04 05.444295 12 29 14.07 +01 20 47.4 17DM171 T09 C~89Ua 2016 04 05.562263 12 29 13.55 +01 20 50.5 17DM171 T09 C~89Ua 2016 06 05.332736 12 26 04.74 +01 36 45.1 17DM171 T09 C~89Ua 2017 01 30.62076 12 37 54.54 +00 19 33.2 23.7z 17DM171 T09 C~89Ua 2017 01 30.62344 12 37 54.52 +00 19 33.2 23.4z 17DM171 T09 C~89Ua 2017 01 30.62613 12 37 54.52 +00 19 33.2 23.5z 17DM171 T09 C~89Ua 2017 01 30.65099 12 37 54.47 +00 19 33.6 23.1z 17DM171 T09 C~89Ua 2017 02 02.612845 12 37 48.72 +00 20 25.1 17DM171 T09 C~89Ua 2017 02 02.658456 12 37 48.62 +00 20 26.0 17DM171 T09 C~89Ua 2017 02 21.50560 12 36 57.16 +00 27 14.8 23.5z 17DM171 T09 C~89Ua 2017 02 21.56347 12 36 56.95 +00 27 16.5 24.0z 17DM171 T09 C~89Ua 2017 02 21.57161 12 36 56.93 +00 27 16.3 23.2z 17DM171 T09 C~89Ua 2017 02 21.59307 12 36 56.86 +00 27 17.0 23.4z 17DM171 T09 C~89Ua 2017 02 23.55566 12 36 50.17 +00 28 06.2 23.6r 17DM171 T09 C~89Ua 2017 02 23.57615 12 36 50.10 +00 28 06.7 23.7r 17DM171 T09 C~89Ua 2017 02 23.62075 12 36 49.95 +00 28 07.7 23.7r 17DM171 T09 C~89Ua 2017 02 23.65038 12 36 49.85 +00 28 08.7 23.7r 17DM171 T09 C~89Ua 2017 02 23.65247 12 36 49.82 +00 28 08.6 23.9r 17DM171 T09 C~89Ua 2019 04 03.450756 12 43 44.03 -00 21 52.0 17DM171 T09 C~89Ua 2019 04 03.474912 12 43 43.93 -00 21 51.6 17DM171 T09 C~89Ua
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 0.04 0.00 -0.19
2 0.0000 0.00 -0.10 0.00 0.10
3 8.8511 0.00 0.05 0.00 0.19
4 12.0190 0.00 0.02 0.00 -0.05
5 12.0194 0.00 0.05 0.00 -0.09
6 12.1857 0.00 -0.06 0.00 0.07
7 12.8409 0.00 0.12 0.00 0.12
8 12.8409 0.00 -0.10 0.00 0.08
9 12.8409 0.00 -0.03 0.00 0.03
10 12.8410 0.00 -0.07 0.00 0.02
11 12.8491 0.00 0.07 0.00 -0.08
12 12.8492 0.00 0.03 0.00 -0.01
13 12.9008 0.00 0.22 0.00 0.00
14 12.9009 0.00 0.04 0.00 0.27
15 12.9010 0.00 0.15 0.00 -0.13
16 12.9010 0.00 0.21 0.00 0.03
17 12.9064 0.00 -0.19 0.00 0.01
18 12.9065 0.00 -0.15 0.00 -0.01
19 12.9066 0.00 -0.04 0.00 -0.14
20 12.9067 0.00 0.02 0.00 0.11
21 12.9067 0.00 -0.31 0.00 -0.04
22 15.0115 0.00 -0.13 0.00 0.02
23 15.0116 0.00 -0.00 0.00 -0.25
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.