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: 19ET5
# Created Tue Apr 1 01:11:12 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 12 observations of 12
# Arc: 5.97y
# First observation: 2019/03/05
# Last observation: 2025/02/23
# Chi-squared of fit: 7.19 DOF: 18 RMS: 0.14
# Min/Max residuals: -0.24 0.30
# Exact a, adot, b, bdot, g, gdot:
1.230528E-05 1.433984E-02 1.989809E-06 2.405503E-03 1.831996E-02 3.814788E-03
# Covariance matrix:
3.5111E-13 -2.8994E-13 2.3608E-14 -3.9244E-14 1.3220E-13 -2.6366E-12
-2.8994E-13 5.3992E-13 -4.1951E-14 8.3743E-14 -7.9511E-14 5.7192E-12
2.3608E-14 -4.1951E-14 2.1657E-13 -5.0768E-14 2.2408E-14 -4.4998E-13
-3.9244E-14 8.3743E-14 -5.0768E-14 3.5750E-14 -1.0585E-14 9.2699E-13
1.3220E-13 -7.9511E-14 2.2408E-14 -1.0585E-14 4.2130E-13 -5.3420E-13
-2.6366E-12 5.7192E-12 -4.4998E-13 9.2699E-13 -5.3420E-13 6.3467E-11
# lat0 lon0 xBary yBary zBary JD0
7.976141 173.560923 0.167678 0.136153 -0.971381 2458547.900321
# Heliocentric elements and errors
Epoch: 2458548.5000 = 2019/03/06
Mean Anomaly: 88.15113 +/- 0.121
Argument of Peri: 283.33090 +/- 0.074
Long of Asc Node: 134.51198 +/- 0.002
Inclination: 12.36610 +/- 0.000
Eccentricity: 0.25256989 +/- 0.0004
Semi-Major Axis: 52.72077478 +/- 0.0191
Time of Perihelion: 2424311.4365 +/- 50.7
Perihelion: 39.40509453 +/- 0.0257
Aphelion: 66.03645503 +/- 0.0320
Period (y) 382.8079 +/- 0.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -54.67086983 +/- 0.0019
Ecliptic Y 6.33075320 +/- 0.0002
Ecliptic Z 7.57439622 +/- 0.0003
Ecliptic XDOT -0.00074362 +/- 0.0000
Ecliptic YDOT -0.00207317 +/- 0.0000
Ecliptic ZDOT 0.00043491 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 55.55478860 +/- 0.0019
Geocenter to KBO 54.58512177 +/- 0.0019
# Hcoef: 6.43
The following table shows the complete astrometric record for 19ET5. 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 (19ET5) followed by the observatory code and reference code for the source of the astrometry.
2019 03 05.39952 11 49 07.910 +09 52 27.71 23.8r 19ET5 568 C~5JzJ 2019 03 05.56697 11 49 07.331 +09 52 32.00 23.7r 19ET5 568 C~5JzJ 2019 05 07.16019 11 45 52.734 +10 11 31.37 19ET5 G37 C~5JzJ 2019 05 07.16796 11 45 52.701 +10 11 31.36 19ET5 G37 C~5JzJ 2019 05 07.20766 11 45 52.628 +10 11 31.81 19ET5 G37 C~5JzJ 2019 12 27.33359 11 54 38.560 +09 16 27.00 23.9r 19ET5 304 C~5JzJ 2019 12 28.31980 11 54 38.592 +09 16 37.76 23.8r 19ET5 304 C~5JzJ 2021 03 17.17960 11 54 55.418 +09 33 10.12 23.8r 19ET5 304 C~5JzJ 2021 03 18.22476 11 54 51.750 +09 33 35.36 23.9r 19ET5 304 C~5JzJ 2025 02 23.415710 12 08 45.699 +08 35 13.77 23.7G 19ET5 G37 C~8iif 2025 02 23.458090 12 08 45.573 +08 35 15.11 19ET5 G37 C~8iif 2025 02 23.509690 12 08 45.446 +08 35 16.52 19ET5 G37 C~8iif
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 0.02 0.00 0.01
2 0.0005 0.00 0.08 0.00 0.06
3 0.1718 0.00 0.05 0.00 -0.13
4 0.1719 0.00 -0.20 0.00 -0.19
5 0.1720 0.00 -0.03 0.00 -0.03
6 0.8130 0.00 -0.00 0.00 0.11
7 0.8157 0.00 0.06 0.00 0.10
8 2.0336 0.00 0.15 0.00 -0.07
9 2.0365 0.00 -0.09 0.00 0.20
10 5.9740 0.00 -0.18 0.00 -0.24
11 5.9742 0.00 -0.14 0.00 0.03
12 5.9743 0.00 0.30 0.00 0.15
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.
19ET5 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 52.673 52.673 52.673 ecceobj 0.259 0.259 0.259 incobj 12.358 12.358 12.358 qmin 38.138 38.219 38.146 qmax 68.820 68.646 68.688 amean 52.908 52.892 52.903 amin 52.289 52.292 52.300 amax 53.749 53.699 53.727 emean 0.259 0.258 0.260 emin 0.241 0.240 0.242 emax 0.280 0.278 0.280 imean 11.295 11.340 11.264 imin 10.745 10.726 10.591 imax 11.957 12.077 11.982 excite_mean 0.325 0.325 0.325 fracstop 1.000 1.000 1.000 cjmean 3.080 3.080 3.080 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 184.3 182.0 181.4 kozaiamp 180.0 180.0 180.0