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 Thu Apr 25 01:18:27 2024
# Orbit generated from Bernstein formalism
# Fitting 9 observations of 9
# Arc: 2.04y
# First observation: 2019/03/05
# Last observation: 2021/03/18
Preliminary a, adot, b, bdot, g, gdot:
-0.000094 0.014255 -0.000007 0.002391 0.018052 0.000000
# Chi-squared of fit: 2.91 DOF: 12 RMS: 0.10
# Min/Max residuals: -0.23 0.18
# Exact a, adot, b, bdot, g, gdot:
1.230179E-05 1.434030E-02 1.786445E-06 2.405902E-03 1.832005E-02 3.831967E-03
# Covariance matrix:
5.1996E-13 -2.5470E-12 9.8711E-14 -4.4421E-13 -2.5571E-13 -8.9543E-11
-2.5470E-12 3.1023E-11 -1.2173E-12 5.8397E-12 5.1737E-12 1.1811E-09
9.8711E-14 -1.2173E-12 3.4438E-13 -4.1962E-13 -1.8749E-13 -4.6631E-11
-4.4421E-13 5.8397E-12 -4.1962E-13 1.3843E-12 9.9444E-13 2.2440E-10
-2.5571E-13 5.1737E-12 -1.8749E-13 9.9444E-13 1.3273E-12 2.0210E-10
-8.9543E-11 1.1811E-09 -4.6631E-11 2.2440E-10 2.0210E-10 4.5394E-08
# lat0 lon0 xBary yBary zBary JD0
7.976141 173.560923 0.167678 0.136153 -0.971381 2458547.900321
# Heliocentric elements and errors
Epoch: 2458540.5000 = 2019/02/26
Mean Anomaly: 87.88678 +/- 2.321
Argument of Peri: 283.44381 +/- 1.422
Long of Asc Node: 134.51613 +/- 0.009
Inclination: 12.36716 +/- 0.002
Eccentricity: 0.25349063 +/- 0.0115
Semi-Major Axis: 52.75022176 +/- 0.3626
Time of Perihelion: 2424377.5085 +/- 830.6
Perihelion: 39.37853469 +/- 0.6621
Aphelion: 66.12190883 +/- 0.7561
Period (y) 383.1287 +/- 3.95
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -54.67062235 +/- 0.0034
Ecliptic Y 6.33072546 +/- 0.0004
Ecliptic Z 7.57435012 +/- 0.0005
Ecliptic XDOT -0.00074614 +/- 0.0000
Ecliptic YDOT -0.00207294 +/- 0.0000
Ecliptic ZDOT 0.00043533 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 55.55471009 +/- 0.0033
Geocenter to KBO 54.58500997 +/- 0.0034
# Hcoef: 6.44
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
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 0.06
2 0.0005 -9.56 0.05 0.50 0.13
3 0.1718 -3099.88 0.09 -105.26 -0.07
4 0.1719 -3100.32 -0.11 -105.46 -0.23
5 0.1720 -3101.49 -0.02 -105.48 -0.01
6 0.8130 5347.88 -0.05 -6.19 0.07
7 0.8157 5343.95 0.00 3.84 0.09
8 2.0336 5169.63 0.18 1012.34 -0.09
9 2.0365 5109.76 -0.16 1013.44 0.05
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:1 Type: 7:3EEEE12:5EEEEEE SCATNEAR axisobj 52.699 53.844 51.736 ecceobj 0.260 0.291 0.231 incobj 12.360 12.365 12.355 qmin 38.569 37.640 39.310 qmax 68.266 71.176 65.034 amean 52.968 53.973 51.882 amin 52.337 53.379 51.394 amax 53.732 54.706 52.462 emean 0.258 0.290 0.227 emin 0.243 0.279 0.215 emax 0.271 0.301 0.240 imean 11.241 10.853 11.206 imin 10.906 10.599 10.813 imax 11.608 11.147 11.581 excite_mean 0.323 0.346 0.299 fracstop 1.000 1.000 1.000 cjmean 3.082 3.075 3.088 libcent 0 181.5 176.8 -180.0 libamp 0 165.9 93.4 -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 175.5 171.6 179.3 kozaiamp 180.0 180.0 180.0