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: 17DK160
# Created Tue May 7 01:17:25 2024
# Orbit generated from Bernstein formalism
# Fitting 7 observations of 7
# Arc: 2.15d
# First observation: 2017/02/21
# Last observation: 2017/02/23
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# Chi-squared of fit: 1.45 DOF: 10 RMS: 0.08
# Min/Max residuals: -0.18 0.15
# Exact a, adot, b, bdot, g, gdot:
1.469455E-05 2.509099E-02 6.146764E-06 9.871598E-03 2.643313E-02 0.000000E+00
# Covariance matrix:
6.7142E-11 1.1129E-07 -4.6818E-12 -8.0080E-09 2.2530E-08 0.0000E+00
1.1129E-07 1.8588E-04 -7.8133E-09 -1.3364E-05 3.7600E-05 0.0000E+00
-4.6818E-12 -7.8133E-09 7.4110E-13 4.8807E-10 -1.5807E-09 0.0000E+00
-8.0080E-09 -1.3364E-05 4.8807E-10 9.8786E-07 -2.7038E-06 0.0000E+00
2.2530E-08 3.7600E-05 -1.5807E-09 -2.7038E-06 7.6071E-06 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.4303E-04
# lat0 lon0 xBary yBary zBary JD0
5.117754 -167.930944 0.629390 0.068117 -0.758830 2457806.003001
# Heliocentric elements and errors
Epoch: 2457800.5000 = 2017/02/16
Mean Anomaly: 324.66556 +/- 100.393
Argument of Peri: 50.65587 +/- 165.100
Long of Asc Node: 178.62778 +/- 7.815
Inclination: 22.05859 +/- 12.154
Eccentricity: 0.02759743 +/- 0.6036
Semi-Major Axis: 39.47796928 +/- 20.8233
Time of Perihelion: 2466693.0519 +/- 296984.0
Perihelion: 38.38847888 +/- 31.2714
Aphelion: 40.56745968 +/- 32.0276
Period (y) 248.0507 +/- 196.26
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -37.72736077 +/- 3.8448
Ecliptic Y -7.42727701 +/- 0.8218
Ecliptic Z 3.37489275 +/- 0.3522
Ecliptic XDOT 0.00063572 +/- 0.0016
Ecliptic YDOT -0.00252898 +/- 0.0012
Ecliptic ZDOT 0.00101832 +/- 0.0003
# Distances at JD0 (AU)
Heliocenter to KBO 38.59932765 +/- 3.7614
Geocenter to KBO 37.83131328 +/- 3.9474
# Hcoef: 8.10
The following table shows the complete astrometric record for 17DK160. 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 (17DK160) followed by the observatory code and reference code for the source of the astrometry.
2017 02 21.50220 12 52 22.64 -00 03 25.8 24.1z 17DK160 T09 C~7xTz 2017 02 21.52572 12 52 22.56 -00 03 24.9 23.5z 17DK160 T09 C~7xTz 2017 02 21.61177 12 52 22.26 -00 03 22.1 23.5z 17DK160 T09 C~7xTz 2017 02 23.54701 12 52 15.73 -00 02 17.9 24.1r 17DK160 T09 C~7xU0 2017 02 23.58243 12 52 15.60 -00 02 16.8 24.1r 17DK160 T09 C~7xU0 2017 02 23.64611 12 52 15.39 -00 02 14.4 23.8r 17DK160 T09 C~7xU0 2017 02 23.65665 12 52 15.35 -00 02 14.1 24.0r 17DK160 T09 C~7xU0
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 0.06 0.00 -0.05
2 0.0001 -1.46 0.01 0.36 0.07
3 0.0003 -6.69 -0.08 1.19 -0.01
4 0.0056 -121.90 -0.02 22.23 -0.07
5 0.0057 -124.12 -0.05 22.49 -0.18
6 0.0059 -127.96 0.05 23.47 0.15
7 0.0059 -128.63 0.03 23.52 0.09
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.
17DK160 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