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: 17EN52
# Created Fri Nov 22 02:10:53 2024
# Orbit generated from Bernstein formalism
# Fitting 17 observations of 17
# Arc: 2.08y
# First observation: 2017/03/06
# Last observation: 2019/04/06
Preliminary a, adot, b, bdot, g, gdot:
-0.000008 0.016897 -0.000001 -0.004614 0.021795 0.000000
# Chi-squared of fit: 6.38 DOF: 28 RMS: 0.11
# Min/Max residuals: -0.34 0.20
# Exact a, adot, b, bdot, g, gdot:
1.136486E-05 1.694484E-02 -3.383800E-06 -4.635297E-03 2.179265E-02 3.861718E-03
# Covariance matrix:
3.7312E-13 9.5507E-13 1.3379E-14 -3.6242E-13 8.4274E-13 3.7942E-11
9.5507E-13 5.3817E-11 9.8254E-13 -1.9321E-11 1.5614E-11 2.0327E-09
1.3379E-14 9.8254E-13 1.7370E-13 -4.3148E-13 2.7041E-13 3.7204E-11
-3.6242E-13 -1.9321E-11 -4.3148E-13 7.0362E-12 -5.5901E-12 -7.3101E-10
8.4274E-13 1.5614E-11 2.7041E-13 -5.5901E-12 6.0268E-12 5.8761E-10
3.7942E-11 2.0327E-09 3.7204E-11 -7.3101E-10 5.8761E-10 7.6909E-08
# lat0 lon0 xBary yBary zBary JD0
7.209266 -165.022096 0.484806 0.108481 -0.856558 2457819.081181
# Heliocentric elements and errors
Epoch: 2457810.5000 = 2017/02/26
Mean Anomaly: 121.69571 +/- 2.524
Argument of Peri: 10.65021 +/- 2.141
Long of Asc Node: 38.90220 +/- 0.004
Inclination: 16.65158 +/- 0.002
Eccentricity: 0.27539773 +/- 0.0067
Semi-Major Axis: 39.33170249 +/- 0.1874
Time of Perihelion: 2427353.6261 +/- 592.9
Perihelion: 28.49984083 +/- 0.2953
Aphelion: 50.16356414 +/- 0.3548
Period (y) 246.6734 +/- 1.76
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.94004610 +/- 0.0050
Ecliptic Y -11.52527258 +/- 0.0013
Ecliptic Z 5.75839897 +/- 0.0006
Ecliptic XDOT 0.00001790 +/- 0.0000
Ecliptic YDOT -0.00220640 +/- 0.0000
Ecliptic ZDOT -0.00051692 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.75038834 +/- 0.0048
Geocenter to KBO 45.88702838 +/- 0.0052
# Hcoef: 7.24
The following table shows the complete astrometric record for 17EN52. 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 (17EN52) followed by the observatory code and reference code for the source of the astrometry.
2017 03 06.58038 13 06 16.83 +00 45 11.8 24.3r 17EN52 T09 C~7zpr 2017 03 06.60310 13 06 16.73 +00 45 12.5 23.9r 17EN52 T09 C~7zpr 2017 03 06.64800 13 06 16.57 +00 45 13.5 23.9r 17EN52 T09 C~7zpr 2017 03 29.44442 13 04 47.41 +00 54 41.6 23.5z 17EN52 T09 C~7zpr 2017 03 29.48659 13 04 47.23 +00 54 42.6 23.9z 17EN52 T09 C~7zpr 2017 03 30.54122 13 04 42.80 +00 55 08.1 23.4y 17EN52 T09 C~7zpr 2017 03 30.56835 13 04 42.69 +00 55 09.1 23.9y 17EN52 T09 C~7zpr 2017 03 30.58180 13 04 42.63 +00 55 09.5 23.6y 17EN52 T09 C~7zpr 2017 04 29.306880 13 02 39.25 +01 05 49.7 17EN52 T09 C~81Bz 2017 04 29.349662 13 02 39.08 +01 05 50.2 17EN52 T09 C~81Bz 2019 03 29.344549 13 11 11.24 -00 19 33.4 17EN52 T09 C~81Bz 2019 04 03.507135 13 10 49.72 -00 17 29.1 17EN52 T09 C~81Bz 2019 04 04.545514 13 10 45.35 -00 17 04.5 17EN52 T09 C~81Bz 2019 04 06.42440 13 10 37.43 -00 16 20.0 23.5i 17EN52 T09 C~81Bz 2019 04 06.44653 13 10 37.34 -00 16 19.3 23.6i 17EN52 T09 C~81Bz 2019 04 06.45475 13 10 37.30 -00 16 19.1 23.4i 17EN52 T09 C~81Bz 2019 04 06.52314 13 10 37.01 -00 16 17.6 23.6i 17EN52 T09 C~81Bz
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 0.19 0.00 0.00
2 0.0001 -1.65 -0.12 0.07 0.03
3 0.0002 -4.25 -0.08 0.07 -0.05
4 0.0626 -1457.17 -0.06 10.71 0.08
5 0.0627 -1460.04 -0.05 10.60 0.04
6 0.0656 -1531.19 0.10 8.61 -0.34
7 0.0657 -1533.09 0.05 8.90 0.01
8 0.0657 -1534.08 -0.01 8.92 0.05
9 0.1471 -3488.75 -0.06 -110.81 0.20
10 0.1472 -3491.30 0.03 -111.33 -0.03
11 2.0610 5571.66 -0.14 -1889.89 0.13
12 2.0751 5225.64 0.16 -1899.17 0.01
13 2.0779 5155.62 0.17 -1901.65 -0.13
14 2.0831 5028.76 -0.04 -1906.22 -0.12
15 2.0831 5027.24 -0.04 -1906.09 0.08
16 2.0832 5026.61 -0.10 -1906.13 0.06
17 2.0833 5022.02 -0.02 -1906.42 -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.
17EN52 quality flag:2 Type: 3:2E 3:2E CENTAURR axisobj 39.043 39.609 38.575 ecceobj 0.283 0.300 0.270 incobj 16.742 16.734 16.750 qmin 27.852 27.576 28.160 qmax 51.914 52.328 49.502 amean 39.455 39.456 38.065 amin 38.896 38.854 36.842 amax 40.126 40.168 39.162 emean 0.281 0.288 0.238 emin 0.260 0.272 0.197 emax 0.294 0.303 0.270 imean 15.778 15.909 16.967 imin 15.107 15.088 16.187 imax 16.442 16.715 17.741 excite_mean 0.391 0.397 0.377 fracstop 1.000 1.000 0.023 cjmean 2.877 2.872 2.873 libcent 0 180.0 179.0 -180.0 libamp 0 132.8 141.5 -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 170.1 178.1 7.4 kozaiamp 180.0 180.0 179.6