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: 17EH56
# Created Mon Apr 28 01:11:08 2025
# Orbit generated from Bernstein formalism
# Fitting 12 observations of 12
# Arc: 3.00y
# First observation: 2016/04/04
# Last observation: 2019/04/06
Preliminary a, adot, b, bdot, g, gdot:
-0.000093 0.026309 0.000004 -0.001192 0.025353 0.000000
# Chi-squared of fit: 1.99 DOF: 18 RMS: 0.07
# Min/Max residuals: -0.11 0.11
# Exact a, adot, b, bdot, g, gdot:
1.625667E-05 2.624866E-02 -3.334073E-07 -1.191345E-03 2.548479E-02 5.539435E-05
# Covariance matrix:
7.3217E-13 -9.6625E-13 -1.8473E-14 3.6013E-14 -3.0714E-13 -9.1696E-12
-9.6625E-13 1.7834E-12 3.5802E-14 -7.4376E-14 3.2592E-13 1.9065E-11
-1.8473E-14 3.5802E-14 3.1909E-13 -1.7221E-13 1.2972E-14 4.1324E-13
3.6013E-14 -7.4376E-14 -1.7221E-13 1.5225E-13 -1.3755E-14 -8.6832E-13
-3.0714E-13 3.2592E-13 1.2972E-14 -1.3755E-14 8.9425E-13 3.1825E-12
-9.1696E-12 1.9065E-11 4.1324E-13 -8.6832E-13 3.1825E-12 2.2283E-10
# lat0 lon0 xBary yBary zBary JD0
4.673469 -169.535477 -0.075564 0.081062 -0.989993 2457482.949010
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 2.64139 +/- 0.329
Argument of Peri: 116.48890 +/- 0.395
Long of Asc Node: 70.80438 +/- 0.008
Inclination: 5.24715 +/- 0.000
Eccentricity: 0.08881211 +/- 0.0002
Semi-Major Axis: 44.14926955 +/- 0.0080
Time of Perihelion: 2456694.3344 +/- 97.8
Perihelion: 40.22827989 +/- 0.0102
Aphelion: 48.07025921 +/- 0.0112
Period (y) 293.3550 +/- 0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -39.42487982 +/- 0.0014
Ecliptic Y -7.36057622 +/- 0.0003
Ecliptic Z 3.19710232 +/- 0.0001
Ecliptic XDOT 0.00049621 +/- 0.0000
Ecliptic YDOT -0.00278297 +/- 0.0000
Ecliptic ZDOT -0.00012707 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.23332815 +/- 0.0014
Geocenter to KBO 39.23909692 +/- 0.0015
# Hcoef: 8.80
The following table shows the complete astrometric record for 17EH56. 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 (17EH56) followed by the observatory code and reference code for the source of the astrometry.
2016 04 04.448221 12 45 47.76 +00 09 26.6 17EH56 T09 C~86v9 2016 04 04.560026 12 45 47.23 +00 09 29.8 17EH56 T09 C~86v9 2017 02 21.611762 12 54 10.64 -00 49 32.0 17EH56 T09 C~86v9 2017 02 23.646095 12 54 03.93 -00 48 40.9 17EH56 T09 C~86v9 2017 03 06.54520 12 53 23.77 -00 43 49.0 24.8r 17EH56 T09 C~86v9 2017 03 06.58835 12 53 23.61 -00 43 47.8 25.0r 17EH56 T09 C~86v9 2017 03 06.63104 12 53 23.43 -00 43 46.7 25.2r 17EH56 T09 C~86v9 2017 04 27.38837 12 49 32.41 -00 19 53.5 24.4i 17EH56 T09 C~86v9 2017 04 27.41137 12 49 32.32 -00 19 53.0 24.2i 17EH56 T09 C~86v9 2017 04 27.42903 12 49 32.23 -00 19 52.7 24.5i 17EH56 T09 C~86v9 2019 04 06.353478 13 02 01.89 -01 47 17.3 17EH56 T09 C~86v9 2019 04 06.465808 13 02 01.34 -01 47 14.1 17EH56 T09 C~86v9
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 -0.08
2 0.0003 -8.57 -0.01 -0.16 -0.07
3 0.8848 8330.65 0.02 -306.74 -0.00
4 0.8903 8217.86 -0.03 -299.04 0.11
5 0.9202 7548.36 -0.11 -265.85 0.01
6 0.9203 7545.67 0.10 -265.68 0.10
7 0.9204 7542.76 0.04 -265.73 -0.03
8 1.0621 3790.15 -0.03 -301.78 0.05
9 1.0622 3788.72 0.10 -301.85 0.08
10 1.0622 3787.36 -0.07 -302.10 -0.09
11 3.0032 16218.49 0.11 -737.48 0.00
12 3.0035 16209.60 -0.11 -737.75 -0.07
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.
17EH56 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.647 43.673 43.620 ecceobj 0.078 0.079 0.077 incobj 5.251 5.251 5.251 qmin 39.499 39.513 39.506 qmax 48.539 48.624 48.457 amean 43.877 43.903 43.849 amin 43.533 43.541 43.520 amax 44.263 44.289 44.208 emean 0.079 0.080 0.078 emin 0.063 0.064 0.061 emax 0.097 0.098 0.097 imean 3.617 3.630 3.595 imin 2.833 2.845 2.823 imax 4.332 4.348 4.304 excite_mean 0.101 0.102 0.100 fracstop 1.000 1.000 1.000 cjmean 3.087 3.088 3.087 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 186.1 184.7 187.3 kozaiamp 180.0 180.0 180.0