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: 17CE56
# Created Sun Apr 27 01:11:04 2025
# Orbit generated from Bernstein formalism
# Fitting 25 observations of 25
# Arc: 0.92y
# First observation: 2016/04/02
# Last observation: 2017/03/04
Preliminary a, adot, b, bdot, g, gdot:
-0.000051 0.021864 -0.000003 0.001051 0.022405 0.000000
# Chi-squared of fit: 13.45 DOF: 44 RMS: 0.13
# Min/Max residuals: -0.41 0.28
# Exact a, adot, b, bdot, g, gdot:
1.475982E-05 2.174353E-02 -6.316566E-07 1.061020E-03 2.283553E-02 1.075405E-03
# Covariance matrix:
2.8561E-13 2.1155E-12 3.4167E-15 7.0728E-14 1.1669E-12 9.6456E-11
2.1155E-12 1.2542E-10 1.0076E-13 3.4036E-12 4.9782E-11 4.7638E-09
3.4167E-15 1.0076E-13 2.0397E-13 -2.3753E-13 4.9408E-14 4.1106E-12
7.0728E-14 3.4036E-12 -2.3753E-13 4.9469E-13 1.3956E-12 1.3087E-10
1.1669E-12 4.9782E-11 4.9408E-14 1.3956E-12 2.1222E-11 1.9378E-09
9.6456E-11 4.7638E-09 4.1106E-12 1.3087E-10 1.9378E-09 1.8271E-07
# lat0 lon0 xBary yBary zBary JD0
3.589746 -173.932872 -0.117284 0.062038 -0.986750 2457480.945354
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 50.16975 +/- 7.625
Argument of Peri: 355.47072 +/- 9.715
Long of Asc Node: 134.64258 +/- 0.020
Inclination: 4.47692 +/- 0.001
Eccentricity: 0.06498917 +/- 0.0170
Semi-Major Axis: 46.59849711 +/- 0.1106
Time of Perihelion: 2441288.6765 +/- 2460.2
Perihelion: 43.57009941 +/- 0.8012
Aphelion: 49.62689480 +/- 0.8031
Period (y) 318.1018 +/- 1.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.43515563 +/- 0.0088
Ecliptic Y -4.84320559 +/- 0.0009
Ecliptic Z 2.74186473 +/- 0.0006
Ecliptic XDOT 0.00015560 +/- 0.0001
Ecliptic YDOT -0.00261206 +/- 0.0000
Ecliptic ZDOT 0.00013504 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.78233489 +/- 0.0087
Geocenter to KBO 43.79141417 +/- 0.0088
# Hcoef: 8.16
The following table shows the complete astrometric record for 17CE56. 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 (17CE56) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.444565 12 27 57.68 +00 53 14.2 17CE56 T09 C~83Ex 2016 04 04.37012 12 27 49.61 +00 54 05.6 25.8g 17CE56 T09 C~8COt 2016 04 04.45424 12 27 49.30 +00 54 08.3 26.2g 17CE56 T09 C~8COt 2016 04 04.48932 12 27 49.13 +00 54 09.1 25.0g 17CE56 T09 C~8COt 2016 04 04.52167 12 27 48.99 +00 54 09.8 25.4g 17CE56 T09 C~8COt 2016 04 04.55367 12 27 48.86 +00 54 10.6 25.5g 17CE56 T09 C~8COt 2016 06 05.320049 12 24 46.18 +01 11 13.6 17CE56 T09 C~83Ex 2016 06 05.332736 12 24 46.17 +01 11 13.6 17CE56 T09 C~83Ex 2017 01 30.62076 12 36 10.27 +00 01 08.2 24.1z 17CE56 T09 C~81Br 2017 01 30.62344 12 36 10.26 +00 01 08.2 24.4z 17CE56 T09 C~81Br 2017 01 30.62613 12 36 10.26 +00 01 08.2 24.0z 17CE56 T09 C~81Br 2017 01 30.62880 12 36 10.25 +00 01 08.2 24.1z 17CE56 T09 C~81Br 2017 01 30.63419 12 36 10.24 +00 01 08.4 24.4z 17CE56 T09 C~81Br 2017 01 30.65099 12 36 10.22 +00 01 08.7 24.2z 17CE56 T09 C~81Br 2017 02 02.61286 12 36 04.65 +00 02 00.0 24.5i 17CE56 T09 C~81Br 2017 02 02.62200 12 36 04.63 +00 02 00.0 24.4i 17CE56 T09 C~81Br 2017 02 02.63046 12 36 04.62 +00 02 00.3 24.5i 17CE56 T09 C~81Br 2017 02 02.65847 12 36 04.55 +00 02 00.8 24.7i 17CE56 T09 C~81Br 2017 02 23.53862 12 35 08.45 +00 09 35.5 24.9r 17CE56 T09 C~81Br 2017 02 23.57615 12 35 08.34 +00 09 36.0 24.8r 17CE56 T09 C~81Br 2017 02 23.60801 12 35 08.22 +00 09 37.0 24.9r 17CE56 T09 C~81Br 2017 02 23.65038 12 35 08.08 +00 09 38.3 24.7r 17CE56 T09 C~81Br 2017 03 04.54977 12 34 36.76 +00 13 29.5 23.6y 17CE56 T09 C~81Br 2017 03 04.59052 12 34 36.59 +00 13 30.7 24.1y 17CE56 T09 C~81Br 2017 03 04.64192 12 34 36.40 +00 13 31.8 23.8y 17CE56 T09 C~81Br
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 0.28
2 0.0053 -131.50 -0.27 -0.67 -0.41
3 0.0055 -136.83 0.20 -0.03 0.28
4 0.0056 -139.49 -0.04 -0.31 0.02
5 0.0057 -141.70 -0.02 -0.49 -0.15
6 0.0058 -143.80 0.07 -0.53 -0.17
7 0.1749 -3064.99 -0.03 -144.46 0.08
8 0.1749 -3065.13 0.04 -144.52 0.07
9 0.8301 8026.50 0.01 53.42 0.07
10 0.8301 8026.36 -0.04 53.36 0.00
11 0.8301 8026.36 0.04 53.36 -0.01
12 0.8301 8026.22 -0.01 53.30 -0.08
13 0.8301 8026.00 -0.05 53.42 0.02
14 0.8301 8025.61 0.09 53.58 0.10
15 0.8382 7928.43 -0.02 67.62 0.08
16 0.8383 7928.15 0.03 67.50 -0.08
17 0.8383 7927.90 0.08 67.72 0.10
18 0.8384 7926.73 -0.09 67.76 0.02
19 0.8955 6972.73 -0.18 152.25 0.09
20 0.8956 6971.02 0.22 152.06 -0.21
21 0.8957 6968.97 -0.02 152.26 -0.10
22 0.8958 6966.52 -0.08 152.63 0.14
23 0.9202 6443.03 0.12 178.97 0.03
24 0.9203 6440.21 -0.14 179.07 0.03
25 0.9205 6437.15 0.03 178.95 -0.20
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.
17CE56 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.098 46.629 45.839 ecceobj 0.060 0.113 0.021 incobj 4.486 4.488 4.484 qmin 42.626 40.683 44.225 qmax 50.261 53.384 48.103 amean 46.327 46.855 46.077 amin 45.951 46.464 45.715 amax 46.722 47.290 46.443 emean 0.064 0.116 0.023 emin 0.051 0.104 0.010 emax 0.076 0.129 0.036 imean 3.354 3.361 3.353 imin 3.005 2.995 3.001 imax 3.708 3.761 3.694 excite_mean 0.087 0.130 0.063 fracstop 1.000 1.000 1.000 cjmean 3.121 3.116 3.122 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 173.3 175.5 178.0 kozaiamp 180.0 180.0 180.0