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: 19EV8
# Created Mon Apr 28 01:11:14 2025
# Orbit generated from Bernstein formalism
# Fitting 19 observations of 19
# Arc: 1.05y
# First observation: 2018/03/18
# Last observation: 2019/04/04
Preliminary a, adot, b, bdot, g, gdot:
-0.000034 0.021069 -0.000001 0.000278 0.022267 0.000000
# Chi-squared of fit: 9.33 DOF: 32 RMS: 0.12
# Min/Max residuals: -0.27 0.26
# Exact a, adot, b, bdot, g, gdot:
1.423033E-05 2.108793E-02 -2.821386E-07 2.780485E-04 2.244441E-02 8.506799E-04
# Covariance matrix:
4.8024E-13 8.4519E-13 7.2324E-15 7.4374E-15 1.0291E-12 6.3767E-11
8.4519E-13 8.9009E-12 2.8597E-14 5.1963E-14 4.8105E-12 4.2397E-10
7.2324E-15 2.8597E-14 1.9180E-13 -2.1347E-13 2.6251E-14 1.6829E-12
7.4374E-15 5.1963E-14 -2.1347E-13 4.0154E-13 3.2053E-14 2.6593E-12
1.0291E-12 4.8105E-12 2.6251E-14 3.2053E-14 3.9015E-12 2.6999E-10
6.3767E-11 4.2397E-10 1.6829E-12 2.6593E-12 2.6999E-10 2.1914E-08
# lat0 lon0 xBary yBary zBary JD0
3.833731 178.194331 0.017261 0.066560 -0.991972 2458195.987663
# Heliocentric elements and errors
Epoch: 2458190.5000 = 2018/03/13
Mean Anomaly: 55.67629 +/- 3.834
Argument of Peri: 18.48110 +/- 4.606
Long of Asc Node: 99.71218 +/- 0.026
Inclination: 3.82704 +/- 0.000
Eccentricity: 0.04426047 +/- 0.0062
Semi-Major Axis: 46.64663180 +/- 0.0254
Time of Perihelion: 2440193.6447 +/- 1239.2
Perihelion: 44.58203015 +/- 0.2910
Aphelion: 48.71123346 +/- 0.2912
Period (y) 318.5948 +/- 0.26
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -45.42726746 +/- 0.0039
Ecliptic Y 1.44220916 +/- 0.0001
Ecliptic Z 2.97898324 +/- 0.0003
Ecliptic XDOT -0.00017591 +/- 0.0000
Ecliptic YDOT -0.00257240 +/- 0.0000
Ecliptic ZDOT 0.00004063 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.54767763 +/- 0.0039
Geocenter to KBO 44.55452191 +/- 0.0039
# Hcoef: 7.62
The following table shows the complete astrometric record for 19EV8. 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 (19EV8) followed by the observatory code and reference code for the source of the astrometry.
2018 03 18.486862 11 59 28.99 +04 14 06.5 19EV8 T09 C~8Aix 2018 03 18.557320 11 59 28.69 +04 14 08.5 19EV8 T09 C~8Aix 2018 03 18.59740 11 59 28.49 +04 14 09.4 24.3i 19EV8 T09 C~8CPR 2018 04 24.379218 11 57 05.57 +04 28 44.2 19EV8 T09 C~8Aix 2018 04 24.38261 11 57 05.56 +04 28 44.2 24.3z 19EV8 T09 C~8CPR 2018 04 24.42024 11 57 05.42 +04 28 44.7 24.0z 19EV8 T09 C~8CPR 2018 04 24.45326 11 57 05.31 +04 28 45.5 24.4z 19EV8 T09 C~8CPR 2018 04 24.504079 11 57 05.15 +04 28 46.3 19EV8 T09 C~8Aix 2018 05 13.056389 11 56 13.771 +04 33 09.94 23.3g 19EV8 W84 C~8HR7 2019 02 05.55162 12 06 26.08 +03 28 13.1 23.3i 19EV8 T09 C~8Aix 2019 02 05.59538 12 06 25.95 +03 28 13.8 24.4i 19EV8 T09 C~8Aix 2019 02 05.59805 12 06 25.95 +03 28 13.9 24.0i 19EV8 T09 C~8Aix 2019 02 05.63843 12 06 25.83 +03 28 14.9 23.9i 19EV8 T09 C~8Aix 2019 03 03.51493 12 04 58.79 +03 39 02.5 24.3z 19EV8 T09 C~8Aix 2019 03 03.53922 12 04 58.70 +03 39 03.3 24.4z 19EV8 T09 C~8Aix 2019 03 03.57949 12 04 58.55 +03 39 04.2 24.1z 19EV8 T09 C~8Aix 2019 03 03.63045 12 04 58.35 +03 39 05.7 23.9z 19EV8 T09 C~8Aix 2019 04 04.440820 12 02 48.17 +03 53 23.5 19EV8 T09 C~8Aix 2019 04 04.467836 12 02 48.05 +03 53 24.1 19EV8 T09 C~8Aix
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 0.13 0.00 0.10
2 0.0002 -4.91 0.08 0.05 0.15
3 0.0003 -8.02 -0.27 -0.32 -0.21
4 0.1010 -2317.27 0.05 -49.33 0.10
5 0.1010 -2317.41 0.09 -49.39 0.05
6 0.1011 -2319.53 -0.02 -49.77 -0.20
7 0.1012 -2321.36 -0.10 -49.69 -0.01
8 0.1013 -2323.87 0.08 -49.91 -0.07
9 0.1521 -3133.78 -0.04 -113.66 0.01
10 0.8872 6824.87 0.08 -29.40 0.26
11 0.8874 6822.81 0.06 -29.54 -0.02
12 0.8874 6822.77 0.14 -29.45 0.06
13 0.8875 6820.72 -0.03 -29.25 0.12
14 0.9583 5366.09 -0.22 42.51 -0.07
15 0.9584 5364.53 -0.18 42.70 0.10
16 0.9585 5362.11 0.03 42.63 -0.03
17 0.9586 5358.76 0.01 42.81 0.08
18 1.0457 3228.90 0.11 49.84 -0.15
19 1.0458 3227.01 0.01 49.67 -0.27
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.
19EV8 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.315 46.442 46.217 ecceobj 0.045 0.063 0.028 incobj 3.824 3.825 3.824 qmin 43.494 42.800 44.163 qmax 49.718 50.603 48.809 amean 46.495 46.597 46.401 amin 46.119 46.205 46.030 amax 46.883 47.008 46.770 emean 0.048 0.065 0.031 emin 0.036 0.053 0.019 emax 0.061 0.077 0.044 imean 2.215 2.220 2.207 imin 1.868 1.866 1.865 imax 2.535 2.547 2.523 excite_mean 0.062 0.076 0.050 fracstop 1.000 1.000 1.000 cjmean 3.128 3.127 3.128 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 171.2 170.2 174.3 kozaiamp 179.9 180.0 179.9