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: 19ES7
# Created Sun Apr 27 01:11:13 2025
# Orbit generated from Bernstein formalism
# Fitting 19 observations of 19
# Arc: 0.97y
# First observation: 2018/03/18
# Last observation: 2019/03/08
Preliminary a, adot, b, bdot, g, gdot:
-0.000050 0.024377 -0.000001 -0.000349 0.024335 0.000000
# Chi-squared of fit: 8.04 DOF: 32 RMS: 0.11
# Min/Max residuals: -0.22 0.30
# Exact a, adot, b, bdot, g, gdot:
1.571774E-05 2.426345E-02 -4.278553E-07 -3.493997E-04 2.459533E-02 -9.579666E-04
# Covariance matrix:
4.8623E-13 1.5927E-12 5.4588E-15 -3.4731E-14 1.3421E-12 8.3319E-11
1.5927E-12 3.2684E-11 6.0560E-14 -5.2577E-13 1.4900E-11 1.2789E-09
5.4588E-15 6.0560E-14 2.6932E-13 -2.9053E-13 3.6460E-14 2.5574E-12
-3.4731E-14 -5.2577E-13 -2.9053E-13 4.4583E-13 -2.6075E-13 -2.1178E-11
1.3421E-12 1.4900E-11 3.6460E-14 -2.6075E-13 8.9660E-12 6.2913E-10
8.3319E-11 1.2789E-09 2.5574E-12 -2.1178E-11 6.2913E-10 5.1420E-08
# lat0 lon0 xBary yBary zBary JD0
2.539172 174.797884 -0.041493 0.044101 -0.992506 2458195.977535
# Heliocentric elements and errors
Epoch: 2458190.5000 = 2018/03/13
Mean Anomaly: 310.31262 +/- 5.304
Argument of Peri: 162.78982 +/- 6.332
Long of Asc Node: 66.42522 +/- 0.034
Inclination: 2.61255 +/- 0.001
Eccentricity: 0.05161608 +/- 0.0078
Semi-Major Axis: 43.01851199 +/- 0.0364
Time of Perihelion: 2472414.6089 +/- 1518.3
Perihelion: 40.79806516 +/- 0.3353
Aphelion: 45.23895883 +/- 0.3357
Period (y) 282.1573 +/- 0.36
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.44544971 +/- 0.0049
Ecliptic Y 3.72445412 +/- 0.0005
Ecliptic Z 1.80125675 +/- 0.0002
Ecliptic XDOT -0.00013415 +/- 0.0000
Ecliptic YDOT -0.00270377 +/- 0.0000
Ecliptic ZDOT -0.00004373 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.65142718 +/- 0.0049
Geocenter to KBO 40.65812497 +/- 0.0049
# Hcoef: 7.83
The following table shows the complete astrometric record for 19ES7. 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 (19ES7) followed by the observatory code and reference code for the source of the astrometry.
2018 03 18.476734 11 44 56.23 +04 23 51.4 19ES7 T09 C~870X 2018 03 18.578695 11 44 55.76 +04 23 54.3 19ES7 T09 C~870X 2018 03 18.605413 11 44 55.64 +04 23 55.0 19ES7 T09 C~870X 2018 04 12.106153 11 43 09.302 +04 34 53.04 23.9V 19ES7 W84 C~8HR7 2018 04 24.412196 11 42 23.99 +04 39 15.7 19ES7 T09 C~870X 2018 04 24.496049 11 42 23.70 +04 39 17.2 19ES7 T09 C~870X 2019 02 02.656217 11 52 58.44 +03 29 25.6 19ES7 T09 C~870X 2019 02 04.599415 11 52 52.57 +03 30 09.1 19ES7 T09 C~870X 2019 02 04.633119 11 52 52.46 +03 30 09.8 19ES7 T09 C~870X 2019 03 02.43427 11 51 14.64 +03 41 31.0 22.6y 19ES7 T09 C~83GA 2019 03 02.53504 11 51 14.19 +03 41 34.1 23.3y 19ES7 T09 C~83GA 2019 03 02.57532 11 51 14.01 +03 41 35.7 23.4y 19ES7 T09 C~83GA 2019 03 07.58077 11 50 52.04 +03 44 01.7 23.3y 19ES7 T09 C~83GA 2019 03 07.61821 11 50 51.87 +03 44 02.7 23.0y 19ES7 T09 C~83GA 2019 03 07.62089 11 50 51.84 +03 44 02.9 23.2y 19ES7 T09 C~83GA 2019 03 08.35114 11 50 48.61 +03 44 24.6 25.1r 19ES7 T09 C~83GA 2019 03 08.37278 11 50 48.52 +03 44 25.1 24.2r 19ES7 T09 C~83GA 2019 03 08.40431 11 50 48.37 +03 44 25.9 25.3r 19ES7 T09 C~83GA 2019 03 08.41479 11 50 48.33 +03 44 26.2 24.7r 19ES7 T09 C~83GA
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 -0.02 0.00 0.04
2 0.0003 -7.60 0.01 -0.13 -0.01
3 0.0004 -9.53 0.07 -0.20 -0.06
4 0.0674 -1730.30 -0.17 -27.60 -0.00
5 0.1011 -2456.46 0.07 -55.19 0.06
6 0.1014 -2461.04 0.05 -55.53 -0.03
7 0.8793 7923.54 -0.10 -120.16 -0.13
8 0.8847 7825.45 0.02 -115.39 0.09
9 0.8848 7823.66 0.01 -115.41 0.02
10 0.9554 6207.18 0.28 -75.56 -0.21
11 0.9557 6199.76 0.13 -75.41 -0.08
12 0.9558 6196.65 -0.08 -75.01 0.30
13 0.9695 5836.54 0.12 -72.37 0.04
14 0.9696 5833.81 0.14 -72.46 -0.06
15 0.9696 5833.32 -0.15 -72.46 -0.05
16 0.9716 5780.29 -0.22 -71.85 0.15
17 0.9717 5778.85 -0.06 -71.93 0.07
18 0.9717 5776.47 -0.10 -72.09 -0.09
19 0.9718 5775.80 0.00 -72.06 -0.05
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.
19ES7 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.726 42.766 42.693 ecceobj 0.044 0.062 0.043 incobj 2.613 2.614 2.613 qmin 40.278 39.664 40.320 qmax 45.622 46.389 45.591 amean 42.877 42.923 42.844 amin 42.544 42.594 42.519 amax 43.212 43.269 43.188 emean 0.036 0.052 0.035 emin 0.016 0.030 0.015 emax 0.056 0.072 0.056 imean 1.069 1.092 1.077 imin 0.211 0.305 0.237 imax 1.770 1.771 1.770 excite_mean 0.041 0.056 0.040 fracstop 1.000 1.000 1.000 cjmean 3.086 3.085 3.086 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 194.7 193.3 195.5 kozaiamp 179.9 180.0 179.9