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: 17CD60 # Created Tue Apr 1 01:11:03 2025 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 95.75d # First observation: 2017/01/21 # Last observation: 2017/04/27 Preliminary a, adot, b, bdot, g, gdot: -0.000016 0.029283 0.000023 0.001692 0.024798 0.000000 # Chi-squared of fit: 10.74 DOF: 26 RMS: 0.14 # Min/Max residuals: -0.27 0.40 # Exact a, adot, b, bdot, g, gdot: 1.492986E-05 2.227166E-02 2.600700E-06 2.139005E-03 2.367905E-02 -8.345213E-04 # Covariance matrix: 2.2202E-13 -1.0138E-11 -2.5639E-14 7.1410E-13 -6.8431E-13 2.0941E-10 -1.0138E-11 5.6425E-09 1.7261E-11 -3.6542E-10 7.9863E-10 -4.8162E-08 -2.5639E-14 1.7261E-11 1.9014E-13 -1.8853E-12 2.4775E-12 -1.4192E-10 7.1410E-13 -3.6542E-10 -1.8853E-12 3.6970E-11 -5.0857E-11 3.3238E-09 -6.8431E-13 7.9863E-10 2.4775E-12 -5.0857E-11 1.1929E-10 -5.6309E-09 2.0941E-10 -4.8162E-08 -1.4192E-10 3.3238E-09 -5.6309E-09 6.5292E-07 # lat0 lon0 xBary yBary zBary JD0 -11.750147 151.759612 0.501083 -0.172743 -0.831340 2457775.092927 # Heliocentric elements and errors Epoch: 2457770.5000 = 2017/01/17 Mean Anomaly: 250.11732 +/- 20.219 Argument of Peri: 50.10278 +/- 19.593 Long of Asc Node: 216.05690 +/- 0.102 Inclination: 12.67600 +/- 0.010 Eccentricity: 0.05462758 +/- 0.0304 Semi-Major Axis: 42.17584800 +/- 0.2987 Time of Perihelion: 2488307.1150 +/- 5609.4 Perihelion: 39.87188355 +/- 1.3111 Aphelion: 44.47981246 +/- 1.3185 Period (y) 273.9075 +/- 2.91 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.93957409 +/- 0.0168 Ecliptic Y 20.40257082 +/- 0.0090 Ecliptic Z -8.60009820 +/- 0.0040 Ecliptic XDOT -0.00117681 +/- 0.0001 Ecliptic YDOT -0.00229618 +/- 0.0000 Ecliptic ZDOT 0.00026173 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.06690980 +/- 0.0151 Geocenter to KBO 42.23142098 +/- 0.0195 # Hcoef: 8.27
The following table shows the complete astrometric record for 17CD60. 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 (17CD60) followed by the observatory code and reference code for the source of the astrometry.
2017 01 21.592126 09 58 23.96 -00 08 49.5 17CD60 T09 C~89UW 2017 01 21.610954 09 58 23.89 -00 08 48.9 17CD60 T09 C~89UW 2017 01 23.446044 09 58 16.53 -00 08 22.2 17CD60 T09 C~89UW 2017 01 23.578080 09 58 15.99 -00 08 20.1 17CD60 T09 C~89UW 2017 01 26.55620 09 58 03.70 -00 07 32.7 24.2z 17CD60 T09 C~89UW 2017 01 26.56693 09 58 03.67 -00 07 32.4 24.1z 17CD60 T09 C~89UW 2017 01 26.58570 09 58 03.57 -00 07 32.1 24.1z 17CD60 T09 C~89UW 2017 01 26.59916 09 58 03.56 -00 07 31.7 24.4z 17CD60 T09 C~89UW 2017 02 02.39743 09 57 34.44 -00 05 27.4 24.9r 17CD60 T09 C~89UW 2017 02 02.41063 09 57 34.37 -00 05 27.1 25.0r 17CD60 T09 C~89UW 2017 02 02.42609 09 57 34.29 -00 05 26.9 24.6r 17CD60 T09 C~89UW 2017 02 02.56306 09 57 33.69 -00 05 24.2 24.3i 17CD60 T09 C~89UW 2017 03 06.444500 09 55 11.85 +00 08 05.5 17CD60 T09 C~89UW 2017 03 06.460646 09 55 11.78 +00 08 05.9 17CD60 T09 C~89UW 2017 04 27.326701 09 52 45.25 +00 32 23.7 17CD60 T09 C~89UW 2017 04 27.341022 09 52 45.23 +00 32 24.0 17CD60 T09 C~89UW
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 -0.24
2 0.0001 -1.19 -0.04 0.19 0.10
3 0.0051 -113.95 0.10 -13.49 -0.06
4 0.0054 -122.27 0.16 -14.36 0.06
5 0.0136 -311.54 -0.10 -34.57 -0.12
6 0.0136 -312.07 0.08 -34.44 0.07
7 0.0137 -313.58 -0.20 -34.69 -0.04
8 0.0137 -313.86 0.40 -34.37 0.37
9 0.0323 -766.52 0.02 -71.02 0.08
10 0.0324 -767.61 -0.15 -71.11 0.06
11 0.0324 -768.80 -0.27 -71.34 -0.10
12 0.0328 -778.18 -0.12 -71.96 -0.07
13 0.1201 -3054.83 0.07 -59.21 -0.06
14 0.1201 -3055.95 0.09 -59.20 -0.13
15 0.2621 -5626.51 0.02 536.21 0.06
16 0.2621 -5626.89 -0.05 536.38 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.
17CD60 quality flag:2 Type: CLASSICAL SCATEXTD CLASSICAL axisobj 41.997 43.039 41.484 ecceobj 0.052 0.139 0.040 incobj 12.694 12.674 12.724 qmin 39.156 36.518 39.108 qmax 45.076 50.038 44.075 amean 42.023 43.129 41.499 amin 41.696 42.763 41.188 amax 42.349 43.544 41.819 emean 0.050 0.133 0.041 emin 0.035 0.117 0.028 emax 0.065 0.150 0.055 imean 13.861 14.125 14.086 imin 13.147 13.225 13.259 imax 14.590 14.922 14.841 excite_mean 0.245 0.278 0.247 fracstop 1.000 1.000 1.000 cjmean 3.008 2.999 3.000 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 178.7 184.6 179.1 kozaiamp 180.0 180.0 180.0