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: 17CJ55
# Created Mon Apr 28 01:11:04 2025
# Orbit generated from Bernstein formalism
# Fitting 20 observations of 20
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000038 0.021528 0.000000 0.000143 0.022571 0.000000
# Chi-squared of fit: 15.11 DOF: 34 RMS: 0.15
# Min/Max residuals: -0.42 0.33
# Exact a, adot, b, bdot, g, gdot:
1.443476E-05 2.142808E-02 5.351045E-07 1.468272E-04 2.293331E-02 -9.621946E-04
# Covariance matrix:
3.4521E-13 3.4022E-12 8.9534E-15 -1.4405E-14 1.6688E-12 1.4628E-10
3.4022E-12 3.0318E-10 5.4579E-13 -1.3052E-12 1.0984E-10 1.1160E-08
8.9534E-15 5.4579E-13 2.3837E-13 -2.8747E-13 2.1016E-13 2.0501E-11
-1.4405E-14 -1.3052E-12 -2.8747E-13 5.0453E-13 -4.6580E-13 -4.7879E-11
1.6688E-12 1.0984E-10 2.1016E-13 -4.6580E-13 4.1594E-11 4.1039E-09
1.4628E-10 1.1160E-08 2.0501E-11 -4.7879E-11 4.1039E-09 4.1315E-07
# lat0 lon0 xBary yBary zBary JD0
3.052321 -173.715471 -0.112644 0.052813 -0.987812 2457480.894196
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 263.77168 +/- 7.098
Argument of Peri: 183.77058 +/- 6.811
Long of Asc Node: 103.69475 +/- 0.046
Inclination: 3.00852 +/- 0.000
Eccentricity: 0.04239360 +/- 0.0292
Semi-Major Axis: 44.31481119 +/- 0.0948
Time of Perihelion: 2486282.4692 +/- 2122.5
Perihelion: 42.43614688 +/- 1.2993
Aphelion: 46.19347550 +/- 1.2999
Period (y) 295.0065 +/- 0.95
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.25581374 +/- 0.0122
Ecliptic Y -4.98938100 +/- 0.0013
Ecliptic Z 2.32190273 +/- 0.0007
Ecliptic XDOT 0.00039508 +/- 0.0001
Ecliptic YDOT -0.00253710 +/- 0.0000
Ecliptic ZDOT 0.00001139 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.59666137 +/- 0.0121
Geocenter to KBO 43.60469570 +/- 0.0123
# Hcoef: 9.06
The following table shows the complete astrometric record for 17CJ55. 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 (17CJ55) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.393407 12 27 54.51 +00 18 28.2 17CJ55 T09 C~81Bq 2016 04 02.419999 12 27 54.40 +00 18 29.1 17CJ55 T09 C~81Bq 2016 04 02.444565 12 27 54.29 +00 18 29.6 17CJ55 T09 C~81Bq 2016 04 06.568131 12 27 36.91 +00 20 19.7 17CJ55 T09 C~81Bq 2016 04 06.573767 12 27 36.92 +00 20 19.6 17CJ55 T09 C~81Bq 2016 06 05.328496 12 24 40.23 +00 36 39.5 17CJ55 T09 C~81Bq 2016 06 05.358251 12 24 40.20 +00 36 39.8 17CJ55 T09 C~81Bq 2017 01 30.63152 12 36 01.48 -00 35 27.3 25.2z 17CJ55 T09 C~7zpj 2017 01 30.63419 12 36 01.46 -00 35 27.3 25.3z 17CJ55 T09 C~7zpj 2017 01 30.65979 12 36 01.44 -00 35 26.8 25.4z 17CJ55 T09 C~7zpj 2017 01 30.66247 12 36 01.42 -00 35 26.8 25.1z 17CJ55 T09 C~7zpj 2017 02 02.61286 12 35 55.75 -00 34 38.6 25.2i 17CJ55 T09 C~7zpj 2017 02 02.61925 12 35 55.74 -00 34 38.8 25.4i 17CJ55 T09 C~7zpj 2017 02 02.62764 12 35 55.72 -00 34 38.2 25.5i 17CJ55 T09 C~7zpj 2017 02 02.65568 12 35 55.66 -00 34 37.9 25.3i 17CJ55 T09 C~7zpj 2017 02 02.66749 12 35 55.65 -00 34 37.6 25.3i 17CJ55 T09 C~7zpj 2017 02 23.53862 12 34 58.64 -00 27 21.7 25.9r 17CJ55 T09 C~7zpj 2017 02 23.56555 12 34 58.56 -00 27 21.0 25.1r 17CJ55 T09 C~7zpj 2017 02 23.63774 12 34 58.34 -00 27 19.1 26.3r 17CJ55 T09 C~7zpj 2017 02 23.63983 12 34 58.29 -00 27 19.0 25.4r 17CJ55 T09 C~7zpj
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 0.07 0.00 -0.09
2 0.0001 -1.87 0.06 0.17 0.11
3 0.0001 -3.58 0.07 -0.02 -0.07
4 0.0114 -286.57 -0.42 -1.97 0.11
5 0.0114 -286.39 0.15 -2.00 0.08
6 0.1750 -3108.37 0.05 -149.70 -0.20
7 0.1751 -3108.91 0.03 -149.60 0.02
8 0.8302 7992.52 0.13 -83.74 0.01
9 0.8302 7992.24 -0.06 -83.86 -0.12
10 0.8303 7991.77 0.29 -83.52 0.14
11 0.8303 7991.49 0.10 -83.64 0.01
12 0.8384 7894.18 -0.14 -72.98 0.03
13 0.8384 7894.12 0.03 -73.22 -0.23
14 0.8384 7893.60 -0.18 -72.79 0.18
15 0.8385 7892.66 -0.13 -72.87 0.01
16 0.8385 7892.40 0.04 -72.65 0.19
17 0.8957 6933.38 -0.15 -10.28 -0.23
18 0.8957 6932.00 0.01 -10.11 -0.11
19 0.8959 6928.21 0.33 -9.67 0.19
20 0.8960 6927.48 -0.28 -9.87 -0.02
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.
17CJ55 quality flag:2 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 43.853 44.259 43.805 ecceobj 0.045 0.122 0.031 incobj 3.008 3.008 3.008 qmin 41.496 34.956 42.021 qmax 46.834 54.716 46.194 amean 44.079 44.553 44.027 amin 43.744 44.047 43.680 amax 44.425 45.107 44.373 emean 0.040 0.154 0.027 emin 0.024 0.115 0.010 emax 0.055 0.213 0.041 imean 1.412 1.714 1.429 imin 0.779 0.290 0.790 imax 2.003 3.665 2.021 excite_mean 0.048 0.158 0.038 fracstop 1.000 1.000 1.000 cjmean 3.100 3.077 3.100 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 159.0 189.2 156.9 kozaiamp 179.9 180.0 180.0