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: 19EJ7
# Created Tue Apr 1 01:11:12 2025
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 0.97y
# First observation: 2018/03/18
# Last observation: 2019/03/08
Preliminary a, adot, b, bdot, g, gdot:
-0.000064 0.026956 -0.000001 0.003189 0.025440 0.000000
# Chi-squared of fit: 14.02 DOF: 30 RMS: 0.16
# Min/Max residuals: -0.37 0.51
# Exact a, adot, b, bdot, g, gdot:
1.698882E-05 2.689545E-02 2.477366E-06 3.197288E-03 2.573567E-02 8.949995E-04
# Covariance matrix:
4.9224E-13 1.6338E-12 -8.7241E-15 2.3919E-13 1.2857E-12 7.7187E-11
1.6338E-12 3.5813E-11 -1.6328E-13 3.8564E-12 1.4268E-11 1.2434E-09
-8.7241E-15 -1.6328E-13 2.3914E-13 -2.8097E-13 -6.5754E-14 -5.7378E-12
2.3919E-13 3.8564E-12 -2.8097E-13 8.7057E-13 1.6664E-12 1.3780E-10
1.2857E-12 1.4268E-11 -6.5754E-14 1.6664E-12 7.5367E-12 5.3751E-10
7.7187E-11 1.2434E-09 -5.7378E-12 1.3780E-10 5.3751E-10 4.4435E-08
# lat0 lon0 xBary yBary zBary JD0
1.643530 175.267560 -0.033108 0.028592 -0.993387 2458195.963881
# Heliocentric elements and errors
Epoch: 2458190.5000 = 2018/03/13
Mean Anomaly: 12.57390 +/- 2.879
Argument of Peri: 357.04244 +/- 3.780
Long of Asc Node: 162.07004 +/- 0.003
Inclination: 6.95705 +/- 0.001
Eccentricity: 0.12613938 +/- 0.0026
Semi-Major Axis: 45.39763205 +/- 0.0338
Time of Perihelion: 2454288.2443 +/- 893.5
Perihelion: 39.67120308 +/- 0.1213
Aphelion: 51.12406103 +/- 0.1237
Period (y) 305.8849 +/- 0.34
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -39.70270826 +/- 0.0041
Ecliptic Y 3.24630108 +/- 0.0004
Ecliptic Z 1.11456477 +/- 0.0001
Ecliptic XDOT -0.00031482 +/- 0.0000
Ecliptic YDOT -0.00284891 +/- 0.0000
Ecliptic ZDOT 0.00034258 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.85079382 +/- 0.0041
Geocenter to KBO 38.85657897 +/- 0.0041
# Hcoef: 8.57
The following table shows the complete astrometric record for 19EJ7. 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 (19EJ7) followed by the observatory code and reference code for the source of the astrometry.
2018 03 18.46308 11 45 14.27 +03 23 21.2 24.8i 19EJ7 T09 C~83G9 2018 03 18.50571 11 45 14.12 +03 23 22.9 25.3i 19EJ7 T09 C~83G9 2018 03 18.57871 11 45 13.71 +03 23 25.1 25.0i 19EJ7 T09 C~83G9 2018 04 24.35538 11 42 39.14 +03 40 42.7 24.0z 19EJ7 T09 C~83G9 2018 04 24.37247 11 42 39.08 +03 40 43.2 23.7z 19EJ7 T09 C~83G9 2018 04 24.40148 11 42 38.99 +03 40 43.9 24.2z 19EJ7 T09 C~83G9 2018 04 24.44523 11 42 38.82 +03 40 44.9 23.6z 19EJ7 T09 C~83G9 2019 02 04.58875 11 54 04.94 +02 35 43.9 25.9g 19EJ7 T09 C~83G9 2019 02 04.62048 11 54 04.84 +02 35 44.6 25.5g 19EJ7 T09 C~83G9 2019 02 04.63313 11 54 04.81 +02 35 45.1 25.5g 19EJ7 T09 C~83G9 2019 02 04.66250 11 54 04.72 +02 35 45.7 25.1g 19EJ7 T09 C~83G9 2019 03 02.51880 11 52 25.43 +02 48 00.8 23.6y 19EJ7 T09 C~83G9 2019 03 02.53504 11 52 25.36 +02 48 01.4 23.2y 19EJ7 T09 C~83G9 2019 03 02.61357 11 52 25.01 +02 48 03.8 23.9y 19EJ7 T09 C~83G9 2019 03 08.35114 11 51 59.33 +02 51 06.1 24.9r 19EJ7 T09 C~83G9 2019 03 08.40431 11 51 59.08 +02 51 07.9 24.5r 19EJ7 T09 C~83G9 2019 03 08.40641 11 51 59.08 +02 51 07.9 24.4r 19EJ7 T09 C~83G9 2019 03 08.43604 11 51 58.93 +02 51 08.8 24.1r 19EJ7 T09 C~83G9
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 -0.10 0.00 -0.11
2 0.0001 -2.74 0.48 0.67 0.51
3 0.0003 -9.24 -0.37 0.25 -0.00
4 0.1010 -2545.25 0.04 34.42 -0.24
5 0.1011 -2546.27 -0.02 34.52 -0.13
6 0.1011 -2547.79 0.11 34.63 -0.01
7 0.1013 -2550.52 -0.15 34.54 -0.09
8 0.8847 8434.29 -0.10 543.56 -0.02
9 0.8848 8432.63 -0.06 543.60 -0.08
10 0.8848 8432.02 0.01 543.88 0.16
11 0.8849 8430.54 0.10 543.89 0.08
12 0.9557 6770.85 0.03 624.65 -0.05
13 0.9557 6769.64 0.03 624.78 0.05
14 0.9559 6763.87 0.08 624.89 -0.00
15 0.9716 6337.93 0.01 638.70 -0.03
16 0.9718 6333.77 -0.09 638.86 0.03
17 0.9718 6333.77 0.07 638.86 0.02
18 0.9719 6331.35 -0.09 638.79 -0.10
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.
19EJ7 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.096 45.324 44.913 ecceobj 0.121 0.133 0.112 incobj 6.980 6.980 6.979 qmin 38.932 38.515 39.150 qmax 51.895 52.703 51.259 amean 45.236 45.452 45.057 amin 44.856 45.073 44.685 amax 45.655 45.874 45.463 emean 0.122 0.134 0.112 emin 0.109 0.120 0.097 emax 0.137 0.149 0.128 imean 6.469 6.452 6.440 imin 5.921 5.857 5.830 imax 7.079 7.111 7.054 excite_mean 0.166 0.175 0.159 fracstop 1.000 1.000 1.000 cjmean 3.083 3.082 3.084 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 172.6 173.3 173.8 kozaiamp 180.0 180.0 179.9