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: 17DK170
# Created Tue Apr 1 01:11:05 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 19 observations of 19
# Arc: 5.09y
# First observation: 2014/02/27
# Last observation: 2019/04/03
# Chi-squared of fit: 7.45 DOF: 32 RMS: 0.11
# Min/Max residuals: -0.28 0.36
# Exact a, adot, b, bdot, g, gdot:
1.633486E-05 2.581113E-02 -5.040905E-07 -3.953235E-04 2.520510E-02 1.711297E-05
# Covariance matrix:
7.3165E-13 -4.5723E-13 -3.9158E-15 4.7001E-15 -2.5970E-14 -2.6370E-12
-4.5723E-13 4.5221E-13 4.7356E-15 -6.0060E-15 2.2211E-13 3.4790E-12
-3.9158E-15 4.7356E-15 4.6987E-13 -1.6027E-13 1.5211E-15 4.2303E-14
4.7001E-15 -6.0060E-15 -1.6027E-13 6.5428E-14 -3.0683E-15 -5.3920E-14
-2.5970E-14 2.2211E-13 1.5211E-15 -3.0683E-15 7.4629E-13 2.1435E-12
-2.6370E-12 3.4790E-12 4.2303E-14 -5.3920E-14 2.1435E-12 3.1320E-11
# lat0 lon0 xBary yBary zBary JD0
3.348781 -174.588198 0.442743 0.051714 -0.882247 2456716.098874
# Heliocentric elements and errors
Epoch: 2456716.5000 = 2014/02/28
Mean Anomaly: 354.65033 +/- 0.142
Argument of Peri: 110.75069 +/- 0.167
Long of Asc Node: 80.30775 +/- 0.009
Inclination: 3.38270 +/- 0.000
Eccentricity: 0.07996688 +/- 0.0001
Semi-Major Axis: 44.06603382 +/- 0.0062
Time of Perihelion: 2458304.2368 +/- 47.6
Perihelion: 40.54221061 +/- 0.0073
Aphelion: 47.58985703 +/- 0.0081
Period (y) 292.5258 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -40.35306093 +/- 0.0014
Ecliptic Y -3.37654826 +/- 0.0001
Ecliptic Z 2.31753741 +/- 0.0001
Ecliptic XDOT 0.00025431 +/- 0.0000
Ecliptic YDOT -0.00279455 +/- 0.0000
Ecliptic ZDOT -0.00004263 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.56035018 +/- 0.0013
Geocenter to KBO 39.67453233 +/- 0.0014
# Hcoef: 9.33
The following table shows the complete astrometric record for 17DK170. 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 (17DK170) followed by the observatory code and reference code for the source of the astrometry.
2014 02 27.598096 12 25 10.60 +00 55 29.7 17DK170 T09 C~89UY 2014 02 27.603516 12 25 10.58 +00 55 29.8 17DK170 T09 C~89UY 2016 04 04.43970 12 33 19.93 +00 00 08.6 26.2g 17DK170 T09 C~89UY 2016 04 04.44255 12 33 19.93 +00 00 08.4 26.1g 17DK170 T09 C~89UY 2016 04 04.47854 12 33 19.76 +00 00 09.6 26.0g 17DK170 T09 C~89UY 2016 04 04.51309 12 33 19.61 +00 00 10.6 26.2g 17DK170 T09 C~89UY 2016 04 04.54301 12 33 19.46 +00 00 11.5 25.6g 17DK170 T09 C~89UY 2016 04 05.452301 12 33 15.30 +00 00 37.5 17DK170 T09 C~89UY 2016 04 05.570256 12 33 14.76 +00 00 40.9 17DK170 T09 C~89UY 2017 01 30.657082 12 42 42.25 -01 03 58.1 17DK170 T09 C~89UY 2017 02 02.664746 12 42 36.55 -01 03 08.5 17DK170 T09 C~89UY 2017 02 21.48870 12 41 44.93 -00 56 27.9 25.0z 17DK170 T09 C~89UY 2017 02 21.53656 12 41 44.76 -00 56 26.4 24.3z 17DK170 T09 C~89UY 2017 02 21.55809 12 41 44.67 -00 56 26.1 25.1z 17DK170 T09 C~89UY 2017 02 21.60643 12 41 44.51 -00 56 24.9 24.7z 17DK170 T09 C~89UY 2017 02 23.53005 12 41 37.86 -00 55 36.6 25.4r 17DK170 T09 C~89UY 2017 02 23.56764 12 41 37.72 -00 55 35.7 25.7r 17DK170 T09 C~89UY 2017 02 23.60167 12 41 37.60 -00 55 34.7 25.6r 17DK170 T09 C~89UY 2019 04 03.469560 12 49 45.34 -01 50 27.1 17DK170 T09 C~89UY
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 0.0000 0.00 0.02 0.00 0.01
3 2.0995 0.00 -0.23 0.00 0.00
4 2.0995 0.00 -0.03 0.00 -0.28
5 2.0996 0.00 -0.05 0.00 -0.11
6 2.0997 0.00 0.11 0.00 -0.10
7 2.0998 0.00 -0.05 0.00 -0.05
8 2.1023 0.00 -0.06 0.00 0.01
9 2.1026 0.00 0.06 0.00 0.05
10 2.9242 0.00 -0.01 0.00 -0.04
11 2.9324 0.00 0.09 0.00 -0.07
12 2.9840 0.00 0.08 0.00 0.05
13 2.9841 0.00 0.04 0.00 0.36
14 2.9841 0.00 -0.19 0.00 0.13
15 2.9843 0.00 -0.06 0.00 0.12
16 2.9895 0.00 0.09 0.00 0.01
17 2.9896 0.00 0.03 0.00 -0.05
18 2.9897 0.00 0.07 0.00 0.08
19 5.0948 0.00 -0.05 0.00 -0.12
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.
17DK170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.745 43.745 43.745 ecceobj 0.073 0.073 0.073 incobj 3.381 3.381 3.381 qmin 39.866 39.878 39.858 qmax 48.289 48.302 48.310 amean 43.969 43.969 43.969 amin 43.625 43.625 43.625 amax 44.352 44.350 44.340 emean 0.073 0.073 0.073 emin 0.057 0.057 0.057 emax 0.090 0.090 0.090 imean 1.690 1.690 1.690 imin 0.908 0.908 0.908 imax 2.337 2.337 2.337 excite_mean 0.079 0.079 0.079 fracstop 1.000 1.000 1.000 cjmean 3.093 3.093 3.093 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 193.8 193.8 193.7 kozaiamp 180.0 179.9 179.9