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: 19EZ8
# Created Mon Apr 28 01:11:14 2025
# Orbit generated from Bernstein formalism
# Fitting 14 observations of 14
# Arc: 1.05y
# First observation: 2018/03/18
# Last observation: 2019/04/04
Preliminary a, adot, b, bdot, g, gdot:
-0.000027 0.022729 0.000000 -0.001090 0.023347 0.000000
# Chi-squared of fit: 2.93 DOF: 22 RMS: 0.08
# Min/Max residuals: -0.14 0.24
# Exact a, adot, b, bdot, g, gdot:
1.507425E-05 2.271499E-02 -4.803431E-07 -1.091643E-03 2.354087E-02 -8.843751E-04
# Covariance matrix:
4.8848E-13 1.0208E-12 7.3114E-15 -7.9188E-14 1.1218E-12 6.7070E-11
1.0208E-12 1.8383E-11 7.0234E-14 -9.3797E-13 1.0170E-11 7.8142E-10
7.3114E-15 7.0234E-14 3.1927E-13 -3.5363E-13 5.0199E-14 3.2880E-12
-7.9188E-14 -9.3797E-13 -3.5363E-13 6.2297E-13 -5.7268E-13 -4.1912E-11
1.1218E-12 1.0170E-11 5.0199E-14 -5.7268E-13 7.6031E-12 4.8292E-10
6.7070E-11 7.8142E-10 3.2880E-12 -4.1912E-11 4.8292E-10 3.5036E-08
# lat0 lon0 xBary yBary zBary JD0
3.868927 177.454428 0.004480 0.067179 -0.992070 2458195.984291
# Heliocentric elements and errors
Epoch: 2458190.5000 = 2018/03/13
Mean Anomaly: 310.81695 +/- 4.596
Argument of Peri: 179.84655 +/- 5.493
Long of Asc Node: 51.43700 +/- 0.020
Inclination: 4.67051 +/- 0.001
Eccentricity: 0.05251164 +/- 0.0068
Semi-Major Axis: 44.94090964 +/- 0.0370
Time of Perihelion: 2473224.4872 +/- 1404.7
Perihelion: 42.58098887 +/- 0.3089
Aphelion: 47.30083041 +/- 0.3094
Period (y) 301.2805 +/- 0.37
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -43.33520450 +/- 0.0050
Ecliptic Y 1.92388199 +/- 0.0002
Ecliptic Z 2.86625935 +/- 0.0003
Ecliptic XDOT -0.00001701 +/- 0.0000
Ecliptic YDOT -0.00264785 +/- 0.0000
Ecliptic ZDOT -0.00013376 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.47248226 +/- 0.0049
Geocenter to KBO 42.47931049 +/- 0.0050
# Hcoef: 7.71
The following table shows the complete astrometric record for 19EZ8. 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 (19EZ8) followed by the observatory code and reference code for the source of the astrometry.
2018 03 18.483490 11 56 49.40 +04 33 42.2 19EZ8 T09 C~8Do3 2018 03 18.554649 11 56 49.08 +04 33 44.3 19EZ8 T09 C~8Do3 2018 03 18.594723 11 56 48.91 +04 33 45.4 19EZ8 T09 C~8Do3 2018 04 24.379218 11 54 19.53 +04 48 24.1 19EZ8 T09 C~8Do3 2018 04 24.501401 11 54 19.11 +04 48 26.0 19EZ8 T09 C~8Do3 2019 02 05.54825 12 04 08.55 +03 40 50.5 24.0i 19EZ8 T09 C~8Do3 2019 02 05.56537 12 04 08.51 +03 40 50.9 23.9i 19EZ8 T09 C~8Do3 2019 02 05.59538 12 04 08.42 +03 40 51.6 24.2i 19EZ8 T09 C~8Do3 2019 02 05.63575 12 04 08.30 +03 40 52.6 24.0i 19EZ8 T09 C~8Do3 2019 02 05.63843 12 04 08.29 +03 40 52.6 24.0i 19EZ8 T09 C~8Do3 2019 03 03.51493 12 02 36.11 +03 51 53.7 23.8z 19EZ8 T09 C~8Do3 2019 03 03.63045 12 02 35.64 +03 51 56.8 23.4z 19EZ8 T09 C~8Do3 2019 03 03.64654 12 02 35.56 +03 51 57.4 23.7z 19EZ8 T09 C~8Do3 2019 04 04.440820 12 00 18.74 +04 06 29.5 19EZ8 T09 C~8Do3
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 0.04 0.00 -0.05
2 0.0002 -5.23 -0.06 0.02 0.04
3 0.0003 -8.00 0.05 0.01 0.07
4 0.1010 -2406.52 -0.10 -83.33 0.09
5 0.1013 -2413.04 0.07 -84.09 -0.14
6 0.8872 7293.28 -0.09 -281.06 -0.13
7 0.8873 7292.57 0.04 -280.93 -0.05
8 0.8874 7291.06 0.00 -280.83 -0.03
9 0.8875 7289.01 -0.06 -280.63 0.06
10 0.8875 7288.87 -0.06 -280.69 -0.01
11 0.9583 5758.34 0.01 -227.53 0.07
12 0.9587 5750.65 0.24 -227.50 0.04
13 0.9587 5749.31 -0.00 -227.43 0.10
14 1.0457 3522.91 -0.08 -247.11 -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.
19EZ8 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.598 44.654 44.562 ecceobj 0.044 0.062 0.039 incobj 4.680 4.681 4.679 qmin 42.047 41.383 42.273 qmax 47.667 48.531 47.403 amean 44.779 44.842 44.741 amin 44.427 44.480 44.402 amax 45.143 45.217 45.097 emean 0.043 0.060 0.038 emin 0.029 0.046 0.024 emax 0.057 0.074 0.051 imean 3.542 3.525 3.546 imin 3.047 3.001 3.052 imax 4.028 4.030 4.028 excite_mean 0.075 0.086 0.073 fracstop 1.000 1.000 1.000 cjmean 3.104 3.103 3.104 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 188.0 185.2 188.2 kozaiamp 180.0 179.9 180.0