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: 19EL7
# Created Mon Apr 28 01:11:13 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:
-0.000051 0.023081 -0.000001 -0.000839 0.023758 0.000000
# Chi-squared of fit: 6.42 DOF: 30 RMS: 0.11
# Min/Max residuals: -0.32 0.23
# Exact a, adot, b, bdot, g, gdot:
1.543127E-05 2.303718E-02 -1.441345E-06 -8.421881E-04 2.400331E-02 2.239541E-04
# Covariance matrix:
4.9306E-13 1.3297E-12 7.3362E-15 -6.9881E-14 1.2272E-12 7.7295E-11
1.3297E-12 2.5739E-11 7.6216E-14 -9.1800E-13 1.1028E-11 1.0101E-09
7.3362E-15 7.6216E-14 2.3904E-13 -2.7199E-13 4.1950E-14 3.2658E-12
-6.9881E-14 -9.1800E-13 -2.7199E-13 4.9640E-13 -4.4137E-13 -3.7719E-11
1.2272E-12 1.1028E-11 4.1950E-14 -4.4137E-13 6.6428E-12 4.8704E-10
7.7295E-11 1.0101E-09 3.2658E-12 -3.7719E-11 4.8704E-10 4.1538E-08
# lat0 lon0 xBary yBary zBary JD0
1.888355 175.272230 -0.033028 0.032837 -0.993259 2458195.963881
# Heliocentric elements and errors
Epoch: 2458190.5000 = 2018/03/13
Mean Anomaly: 92.03099 +/- 4.325
Argument of Peri: 45.58314 +/- 4.289
Long of Asc Node: 36.72857 +/- 0.023
Inclination: 2.78745 +/- 0.001
Eccentricity: 0.00812982 +/- 0.0088
Semi-Major Axis: 42.63979881 +/- 0.0123
Time of Perihelion: 2432191.7338 +/- 1221.7
Perihelion: 42.29314477 +/- 0.3757
Aphelion: 42.98645285 +/- 0.3757
Period (y) 278.4395 +/- 0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -42.49116117 +/- 0.0045
Ecliptic Y 3.47375557 +/- 0.0004
Ecliptic Z 1.37277226 +/- 0.0001
Ecliptic XDOT -0.00023881 +/- 0.0000
Ecliptic YDOT -0.00262083 +/- 0.0000
Ecliptic ZDOT -0.00009532 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.65501446 +/- 0.0044
Geocenter to KBO 41.66092620 +/- 0.0045
# Hcoef: 8.25
The following table shows the complete astrometric record for 19EL7. 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 (19EL7) followed by the observatory code and reference code for the source of the astrometry.
2018 03 18.46308 11 45 38.68 +03 36 43.4 24.1i 19EL7 T09 C~83G9 2018 03 18.50571 11 45 38.48 +03 36 44.4 24.0i 19EL7 T09 C~83G9 2018 03 18.57871 11 45 38.16 +03 36 46.4 24.0i 19EL7 T09 C~83G9 2018 04 24.37247 11 43 09.01 +03 51 56.1 23.4z 19EL7 T09 C~83G9 2018 04 24.40148 11 43 08.91 +03 51 56.3 23.5z 19EL7 T09 C~83G9 2018 04 24.44523 11 43 08.77 +03 51 57.3 23.8z 19EL7 T09 C~83G9 2018 04 24.49606 11 43 08.60 +03 51 57.8 24.1z 19EL7 T09 C~83G9 2019 02 04.58875 11 53 12.93 +02 44 02.3 25.7g 19EL7 T09 C~83G9 2019 02 04.63313 11 53 12.78 +02 44 03.3 26.1g 19EL7 T09 C~83G9 2019 02 04.66250 11 53 12.69 +02 44 03.8 25.4g 19EL7 T09 C~83G9 2019 02 05.45789 11 53 10.27 +02 44 20.9 24.5i 19EL7 T09 C~83G9 2019 02 05.47392 11 53 10.22 +02 44 21.2 24.1i 19EL7 T09 C~83G9 2019 02 05.51157 11 53 10.09 +02 44 22.1 24.6i 19EL7 T09 C~83G9 2019 02 05.51425 11 53 10.09 +02 44 22.1 24.6i 19EL7 T09 C~83G9 2019 03 08.35114 11 51 11.30 +02 57 37.4 24.5r 19EL7 T09 C~83G9 2019 03 08.36022 11 51 11.26 +02 57 37.5 24.5r 19EL7 T09 C~83G9 2019 03 08.40431 11 51 11.08 +02 57 38.9 24.9r 19EL7 T09 C~83G9 2019 03 08.43604 11 51 10.93 +02 57 39.7 24.4r 19EL7 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 -0.05 0.00 0.18
2 0.0001 -3.14 -0.06 -0.27 -0.04
3 0.0003 -8.34 0.11 -0.34 -0.04
4 0.1011 -2418.62 -0.15 -51.41 0.23
5 0.1011 -2420.07 -0.04 -51.82 -0.10
6 0.1013 -2422.39 0.00 -51.73 0.10
7 0.1014 -2424.93 0.19 -52.28 -0.32
8 0.8847 7502.63 0.10 -191.60 0.04
9 0.8848 7500.17 -0.09 -191.58 0.02
10 0.8849 7498.73 -0.02 -191.66 -0.08
11 0.8870 7458.61 0.04 -190.44 0.01
12 0.8871 7457.80 0.06 -190.47 -0.03
13 0.8872 7455.66 -0.11 -190.42 -0.01
14 0.8872 7455.66 0.03 -190.42 -0.01
15 0.9716 5504.55 -0.11 -170.54 0.05
16 0.9717 5503.96 -0.04 -170.69 -0.10
17 0.9718 5500.93 0.12 -170.48 0.13
18 0.9719 5498.55 0.04 -170.64 -0.01
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.
19EL7 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.378 42.486 42.308 ecceobj 0.015 0.035 0.013 incobj 2.794 2.793 2.794 qmin 40.362 39.323 41.031 qmax 44.871 46.122 44.044 amean 42.515 42.619 42.451 amin 42.195 42.284 42.127 amax 42.859 42.978 42.776 emean 0.026 0.050 0.015 emin 0.004 0.026 0.000 emax 0.047 0.074 0.030 imean 1.941 2.015 1.955 imin 0.476 0.426 0.470 imax 2.836 2.950 2.849 excite_mean 0.045 0.063 0.038 fracstop 1.000 1.000 1.000 cjmean 3.082 3.080 3.081 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 176.5 178.3 184.9 kozaiamp 179.9 180.0 180.0