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: 18FL73
# Created Tue Apr 1 01:11:09 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 21 observations of 21
# Arc: 5.01y
# First observation: 2014/02/28
# Last observation: 2019/03/02
# Chi-squared of fit: 7.07 DOF: 36 RMS: 0.10
# Min/Max residuals: -0.25 0.21
# Exact a, adot, b, bdot, g, gdot:
1.526279E-05 2.246285E-02 -1.938259E-07 -9.141406E-04 2.343934E-02 -2.676911E-03
# Covariance matrix:
3.6694E-13 -1.6422E-13 -5.4227E-16 3.4395E-15 -8.3582E-14 -7.9249E-13
-1.6422E-13 1.2232E-12 8.2199E-15 -4.6219E-14 1.7147E-12 1.0859E-11
-5.4227E-16 8.2199E-15 3.5441E-13 -7.9391E-14 1.1966E-14 7.4156E-14
3.4395E-15 -4.6219E-14 -7.9391E-14 2.3666E-14 -6.5020E-14 -4.1834E-13
-8.3582E-14 1.7147E-12 1.1966E-14 -6.5020E-14 2.6674E-12 1.5366E-11
-7.9249E-13 1.0859E-11 7.4156E-14 -4.1834E-13 1.5366E-11 9.8228E-11
# lat0 lon0 xBary yBary zBary JD0
2.611665 172.439668 0.218041 0.044042 -0.963364 2456716.991570
# Heliocentric elements and errors
Epoch: 2456716.5000 = 2014/02/28
Mean Anomaly: 292.40158 +/- 0.050
Argument of Peri: 213.88234 +/- 0.031
Long of Asc Node: 39.81365 +/- 0.004
Inclination: 3.45300 +/- 0.000
Eccentricity: 0.12551863 +/- 0.0005
Semi-Major Axis: 45.14036135 +/- 0.0133
Time of Perihelion: 2477517.3001 +/- 42.7
Perihelion: 39.47440489 +/- 0.0244
Aphelion: 50.80631780 +/- 0.0262
Period (y) 303.2884 +/- 0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -43.17722887 +/- 0.0029
Ecliptic Y 5.95189206 +/- 0.0004
Ecliptic Z 1.94400668 +/- 0.0001
Ecliptic XDOT -0.00004616 +/- 0.0000
Ecliptic YDOT -0.00264441 +/- 0.0000
Ecliptic ZDOT -0.00012078 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.62893698 +/- 0.0029
Geocenter to KBO 42.66343096 +/- 0.0030
# Hcoef: 6.89
The following table shows the complete astrometric record for 18FL73. 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 (18FL73) followed by the observatory code and reference code for the source of the astrometry.
2014 02 28.490792 11 36 22.25 +05 23 55.7 18FL73 T09 C~89VM 2014 02 28.505033 11 36 22.19 +05 23 56.2 18FL73 T09 C~89VM 2014 02 28.524138 11 36 22.11 +05 23 56.7 18FL73 T09 C~89VM 2014 02 28.566397 11 36 21.93 +05 23 57.8 18FL73 T09 C~89VM 2018 03 18.46645 11 53 55.90 +03 15 44.4 22.9i 18FL73 T09 C~86yU 2018 03 18.46982 11 53 55.87 +03 15 44.5 22.8i 18FL73 T09 C~86yU 2018 03 18.51105 11 53 55.71 +03 15 45.7 23.0i 18FL73 T09 C~86yU 2018 03 18.56803 11 53 55.45 +03 15 47.1 23.6i 18FL73 T09 C~86yU 2018 04 24.40415 11 51 25.82 +03 30 53.7 22.9z 18FL73 T09 C~86yU 2018 04 24.40683 11 51 25.79 +03 30 53.7 23.2z 18FL73 T09 C~86yU 2018 04 24.45059 11 51 25.65 +03 30 54.6 22.7z 18FL73 T09 C~86yU 2018 04 24.49071 11 51 25.50 +03 30 55.4 22.6z 18FL73 T09 C~86yU 2018 06 09.043981 11 50 01.335 +03 37 14.20 18FL73 X11 C~86yU 2018 06 09.049178 11 50 01.333 +03 37 14.20 18FL73 X11 C~86yU 2018 06 09.051771 11 50 01.330 +03 37 14.20 18FL73 X11 C~86yU 2019 02 02.644951 12 01 29.23 +02 22 07.3 18FL73 T09 C~89VM 2019 02 04.590836 12 01 23.80 +02 22 46.6 18FL73 T09 C~89VM 2019 03 02.42071 11 59 51.58 +02 33 20.1 22.7y 18FL73 T09 C~8CPH 2019 03 02.52415 11 59 51.15 +02 33 22.9 23.2y 18FL73 T09 C~8CPH 2019 03 02.56456 11 59 50.97 +02 33 23.8 23.1y 18FL73 T09 C~8CPH 2019 03 02.60552 11 59 50.80 +02 33 25.1 23.0y 18FL73 T09 C~8CPH
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 -0.06 0.00 -0.07
2 0.0000 0.00 -0.04 0.00 0.04
3 0.0001 0.00 -0.00 0.00 0.01
4 0.0002 0.00 0.03 0.00 -0.06
5 4.0492 0.00 -0.00 0.00 0.05
6 4.0492 0.00 -0.23 0.00 0.06
7 4.0493 0.00 0.14 0.00 0.10
8 4.0495 0.00 0.06 0.00 -0.09
9 4.1503 0.00 0.21 0.00 0.01
10 4.1504 0.00 -0.10 0.00 -0.04
11 4.1505 0.00 0.07 0.00 0.02
12 4.1506 0.00 -0.11 0.00 0.06
13 4.2753 0.00 0.09 0.00 0.14
14 4.2753 0.00 0.08 0.00 0.16
15 4.2753 0.00 0.04 0.00 0.17
16 4.9286 0.00 0.06 0.00 -0.07
17 4.9339 0.00 0.10 0.00 -0.08
18 5.0046 0.00 -0.10 0.00 -0.01
19 5.0049 0.00 -0.02 0.00 -0.04
20 5.0050 0.00 -0.17 0.00 -0.25
21 5.0051 0.00 -0.14 0.00 -0.07
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.
18FL73 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.824 44.823 44.824 ecceobj 0.124 0.124 0.124 incobj 3.458 3.458 3.458 qmin 38.824 38.826 38.825 qmax 51.619 51.621 51.616 amean 45.039 45.039 45.039 amin 44.667 44.654 44.665 amax 45.460 45.453 45.451 emean 0.120 0.120 0.120 emin 0.104 0.104 0.104 emax 0.136 0.136 0.136 imean 2.705 2.705 2.704 imin 2.022 2.021 2.023 imax 3.287 3.287 3.288 excite_mean 0.129 0.129 0.129 fracstop 1.000 1.000 1.000 cjmean 3.094 3.094 3.094 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 186.9 186.9 186.9 kozaiamp 180.0 179.9 180.0