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: 19EQ7
# Created Tue Apr 1 01:11:12 2025
# Orbit generated from Bernstein formalism
# Fitting 15 observations of 15
# Arc: 0.95y
# First observation: 2018/04/22
# Last observation: 2019/04/04
Preliminary a, adot, b, bdot, g, gdot:
-0.000009 0.034024 -0.000002 0.002862 0.027926 0.000000
# Chi-squared of fit: 33.24 DOF: 24 RMS: 0.26
# Min/Max residuals: -0.50 1.02
# Exact a, adot, b, bdot, g, gdot:
1.847387E-05 3.374147E-02 2.070238E-06 2.855706E-03 2.826781E-02 2.600734E-03
# Covariance matrix:
5.1156E-13 2.9919E-12 -4.0552E-15 2.5799E-13 1.6045E-12 9.8846E-11
2.9919E-12 5.7874E-10 -6.4556E-13 4.2486E-11 2.7457E-10 1.6311E-08
-4.0552E-15 -6.4556E-13 4.8654E-13 -6.0403E-13 -3.0481E-13 -1.8189E-11
2.5799E-13 4.2486E-11 -6.0403E-13 3.9242E-12 2.0243E-11 1.2000E-09
1.6045E-12 2.7457E-10 -3.0481E-13 2.0243E-11 1.3212E-10 7.7758E-09
9.8846E-11 1.6311E-08 -1.8189E-11 1.2000E-09 7.7758E-09 4.6076E-07
# lat0 lon0 xBary yBary zBary JD0
3.882968 178.536970 -0.545377 0.056891 -0.837143 2458230.783437
# Heliocentric elements and errors
Epoch: 2458230.5000 = 2018/04/22
Mean Anomaly: 9.64563 +/- 1.892
Argument of Peri: 17.94707 +/- 4.226
Long of Asc Node: 141.13629 +/- 0.019
Inclination: 6.10826 +/- 0.002
Eccentricity: 0.33791107 +/- 0.0087
Semi-Major Axis: 53.82904908 +/- 0.3169
Time of Perihelion: 2454365.4817 +/- 757.2
Perihelion: 35.63961739 +/- 0.5149
Aphelion: 72.01848076 +/- 0.6331
Period (y) 394.9419 +/- 3.49
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -36.13705876 +/- 0.0143
Ecliptic Y 0.37006697 +/- 0.0004
Ecliptic Z 2.39571901 +/- 0.0010
Ecliptic XDOT -0.00030933 +/- 0.0001
Ecliptic YDOT -0.00326524 +/- 0.0000
Ecliptic ZDOT 0.00029285 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 36.21827487 +/- 0.0143
Geocenter to KBO 35.37592664 +/- 0.0144
# Hcoef: 8.45
The following table shows the complete astrometric record for 19EQ7. 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 (19EQ7) followed by the observatory code and reference code for the source of the astrometry.
2018 04 22.282636 12 00 49.16 +04 08 38.4 19EQ7 T09 C~870X 2018 04 24.382594 12 00 40.78 +04 09 28.2 19EQ7 T09 C~870X 2018 04 24.422899 12 00 40.61 +04 09 29.1 19EQ7 T09 C~870X 2019 02 05.55500 12 13 47.34 +02 51 27.3 23.7i 19EQ7 T09 C~83GA 2019 02 05.60072 12 13 47.21 +02 51 28.5 23.6i 19EQ7 T09 C~83GA 2019 02 05.62764 12 13 47.13 +02 51 29.1 23.4i 19EQ7 T09 C~83GA 2019 03 03.51760 12 12 07.68 +03 04 47.4 23.7z 19EQ7 T09 C~83GA 2019 03 03.52028 12 12 07.66 +03 04 47.4 23.9z 19EQ7 T09 C~83GA 2019 03 03.52564 12 12 07.67 +03 04 47.5 23.5z 19EQ7 T09 C~83GA 2019 03 03.54189 12 12 07.57 +03 04 48.0 23.3z 19EQ7 T09 C~83GA 2019 03 03.58217 12 12 07.39 +03 04 49.2 23.7z 19EQ7 T09 C~83GA 2019 03 29.36345 12 10 02.23 +03 19 29.9 24.3y 19EQ7 T09 C~83GA 2019 03 29.37692 12 10 02.10 +03 19 31.1 24.3y 19EQ7 T09 C~83GA 2019 03 29.39309 12 10 02.01 +03 19 32.1 24.5y 19EQ7 T09 C~83GA 2019 04 04.493018 12 09 32.13 +03 22 49.0 19EQ7 T09 C~870X
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 0.08 0.00 -0.10
2 0.0057 -134.83 0.01 -4.31 0.08
3 0.0059 -137.52 -0.09 -4.50 0.00
4 0.7920 12545.74 -0.11 421.39 -0.06
5 0.7921 12543.46 0.02 421.71 -0.01
6 0.7922 12542.12 0.09 421.78 -0.10
7 0.8631 10851.75 -0.18 554.51 0.23
8 0.8631 10851.47 -0.25 554.39 0.10
9 0.8631 10851.57 0.27 554.54 0.24
10 0.8631 10849.99 -0.05 554.40 0.04
11 0.8632 10847.04 0.12 554.41 -0.07
12 0.9338 8771.99 1.02 608.75 -0.50
13 0.9339 8769.73 -0.14 609.06 -0.18
14 0.9339 8768.09 -0.44 609.44 0.19
15 0.9506 8278.41 -0.34 610.35 0.11
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.
19EQ7 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 53.365 55.478 51.897 ecceobj 0.332 0.374 0.300 incobj 6.116 6.123 6.108 qmin 34.765 33.152 35.386 qmax 74.383 79.390 70.176 amean 53.961 55.449 52.215 amin 52.892 54.373 51.604 amax 55.202 56.754 53.083 emean 0.336 0.375 0.304 emin 0.319 0.351 0.289 emax 0.356 0.405 0.324 imean 4.840 5.746 4.789 imin 3.978 3.998 4.180 imax 5.951 8.320 5.591 excite_mean 0.347 0.389 0.315 fracstop 1.000 1.000 1.000 cjmean 3.070 3.044 3.076 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 174.2 165.2 179.7 kozaiamp 180.0 180.0 180.0