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: 19EY8
# Created Mon Apr 28 01:11:14 2025
# Orbit generated from Bernstein formalism
# Fitting 15 observations of 15
# Arc: 4.19y
# First observation: 2015/01/25
# Last observation: 2019/04/05
Preliminary a, adot, b, bdot, g, gdot:
-0.000077 0.025815 0.000002 -0.000667 0.024869 0.000000
# Chi-squared of fit: 5.96 DOF: 24 RMS: 0.11
# Min/Max residuals: -0.22 0.18
# Exact a, adot, b, bdot, g, gdot:
1.587108E-05 2.554435E-02 -3.796013E-07 -6.621604E-04 2.475025E-02 -1.085992E-04
# Covariance matrix:
8.8248E-13 4.2780E-14 -4.9793E-15 -5.7491E-15 5.2338E-13 2.1183E-12
4.2780E-14 1.2955E-12 -7.7253E-15 -3.1595E-14 1.3663E-12 1.2499E-11
-4.9793E-15 -7.7253E-15 7.0503E-13 -1.7954E-13 -1.5770E-14 -7.4577E-14
-5.7491E-15 -3.1595E-14 -1.7954E-13 5.3852E-14 -3.4927E-14 -3.1778E-13
5.2338E-13 1.3663E-12 -1.5770E-14 -3.4927E-14 2.0663E-12 1.3502E-11
2.1183E-12 1.2499E-11 -7.4577E-14 -3.1778E-13 1.3502E-11 1.2585E-10
# lat0 lon0 xBary yBary zBary JD0
4.011790 173.850756 0.740415 0.045309 -0.643850 2457048.065643
# Heliocentric elements and errors
Epoch: 2457040.5000 = 2015/01/18
Mean Anomaly: 350.68026 +/- 0.184
Argument of Peri: 121.44647 +/- 0.234
Long of Asc Node: 63.09475 +/- 0.006
Inclination: 4.19290 +/- 0.000
Eccentricity: 0.11506028 +/- 0.0002
Semi-Major Axis: 46.29471302 +/- 0.0090
Time of Perihelion: 2460018.9936 +/- 58.7
Perihelion: 40.96803028 +/- 0.0114
Aphelion: 51.62139575 +/- 0.0129
Period (y) 314.9962 +/- 0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -40.63814760 +/- 0.0023
Ecliptic Y 5.12275794 +/- 0.0003
Ecliptic Z 2.82667951 +/- 0.0002
Ecliptic XDOT -0.00029968 +/- 0.0000
Ecliptic YDOT -0.00281557 +/- 0.0000
Ecliptic ZDOT -0.00007381 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.05717728 +/- 0.0023
Geocenter to KBO 40.40362998 +/- 0.0023
# Hcoef: 8.18
The following table shows the complete astrometric record for 19EY8. 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 (19EY8) followed by the observatory code and reference code for the source of the astrometry.
2015 01 25.564865 11 43 48.20 +06 07 29.1 19EY8 T09 C~8Do3 2015 03 17.308664 11 40 28.97 +06 30 48.7 19EY8 T09 C~8Do3 2018 03 18.483490 11 56 33.85 +04 38 39.3 19EY8 T09 C~8Do3 2018 03 18.597393 11 56 33.32 +04 38 42.6 19EY8 T09 C~8Do3 2018 04 22.422267 11 54 04.23 +04 53 29.4 19EY8 T09 C~8Do3 2019 02 05.59538 12 04 40.63 +03 41 32.1 24.3i 19EY8 T09 C~8Do3 2019 02 05.63575 12 04 40.52 +03 41 32.9 23.9i 19EY8 T09 C~8Do3 2019 02 05.63843 12 04 40.52 +03 41 33.3 24.1i 19EY8 T09 C~8Do3 2019 03 03.51493 12 03 04.53 +03 53 10.2 23.8z 19EY8 T09 C~8Do3 2019 03 03.59019 12 03 04.18 +03 53 12.6 24.2z 19EY8 T09 C~8Do3 2019 03 03.63045 12 03 04.02 +03 53 13.8 24.4z 19EY8 T09 C~8Do3 2019 03 03.64654 12 03 03.96 +03 53 14.3 23.9z 19EY8 T09 C~8Do3 2019 04 04.440820 12 00 40.81 +04 08 34.4 19EY8 T09 C~8Do3 2019 04 04.467836 12 00 40.69 +04 08 35.0 19EY8 T09 C~8Do3 2019 04 05.530772 12 00 36.01 +04 09 03.1 19EY8 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 0.09 0.00 -0.01
2 0.1389 -3282.11 -0.07 105.26 -0.05
3 3.1428 12626.95 0.04 -308.07 0.07
4 3.1431 12618.33 0.05 -308.24 0.03
5 3.2385 10213.88 -0.16 -392.50 0.18
6 4.0302 20726.67 -0.22 -504.40 -0.15
7 4.0303 20724.82 0.02 -504.33 -0.20
8 4.0303 20724.66 -0.01 -503.96 0.16
9 4.1012 19113.93 0.16 -447.67 -0.14
10 4.1014 19108.12 -0.20 -447.59 -0.10
11 4.1015 19105.42 0.00 -447.47 0.02
12 4.1015 19104.39 0.13 -447.37 0.10
13 4.1886 16755.64 -0.02 -471.29 0.08
14 4.1886 16753.74 0.05 -471.47 -0.02
15 4.1916 16677.85 0.15 -474.04 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.
19EY8 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.866 45.889 45.842 ecceobj 0.106 0.107 0.106 incobj 4.193 4.193 4.193 qmin 40.299 40.339 40.274 qmax 52.093 52.134 52.039 amean 46.046 46.069 46.022 amin 45.669 45.676 45.649 amax 46.464 46.485 46.429 emean 0.108 0.108 0.107 emin 0.095 0.095 0.095 emax 0.121 0.122 0.121 imean 2.896 2.897 2.895 imin 2.459 2.462 2.455 imax 3.369 3.368 3.365 excite_mean 0.119 0.119 0.119 fracstop 1.000 1.000 1.000 cjmean 3.109 3.110 3.109 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 181.0 181.0 181.2 kozaiamp 180.0 180.0 180.0