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: 19EV9
# Created Wed Dec 25 02:11:01 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 21 observations of 21
# Arc: 5.98y
# First observation: 2013/03/14
# Last observation: 2019/03/08
# Chi-squared of fit: 14.45 DOF: 36 RMS: 0.15
# Min/Max residuals: -0.44 0.27
# Exact a, adot, b, bdot, g, gdot:
1.584064E-05 2.566373E-02 2.730361E-06 5.206583E-03 2.612764E-02 1.744454E-03
# Covariance matrix:
7.2913E-13 -2.8726E-13 1.5916E-14 -3.4272E-14 -1.6354E-13 -1.0815E-12
-2.8726E-13 5.6930E-13 -5.3732E-14 1.1595E-13 8.9239E-13 3.6533E-12
1.5916E-14 -5.3732E-14 6.5875E-13 -1.2971E-13 -9.1506E-14 -3.6157E-13
-3.4272E-14 1.1595E-13 -1.2971E-13 4.8745E-14 1.9784E-13 7.8044E-13
-1.6354E-13 8.9239E-13 -9.1506E-14 1.9784E-13 2.0085E-12 6.2246E-12
-1.0815E-12 3.6533E-12 -3.6157E-13 7.8044E-13 6.2246E-12 2.4585E-11
# lat0 lon0 xBary yBary zBary JD0
0.107456 166.804107 -0.122173 0.001887 -0.987366 2456365.822699
# Heliocentric elements and errors
Epoch: 2456366.5000 = 2013/03/15
Mean Anomaly: 82.40727 +/- 0.063
Argument of Peri: 269.89563 +/- 0.093
Long of Asc Node: 166.46229 +/- 0.000
Inclination: 11.47027 +/- 0.000
Eccentricity: 0.07182163 +/- 0.0002
Semi-Major Axis: 39.43326529 +/- 0.0059
Time of Perihelion: 2435662.4375 +/- 16.5
Perihelion: 36.60110372 +/- 0.0090
Aphelion: 42.26542685 +/- 0.0096
Period (y) 247.6295 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -38.25146466 +/- 0.0020
Ecliptic Y 8.84551968 +/- 0.0005
Ecliptic Z 0.07190154 +/- 0.0000
Ecliptic XDOT -0.00079714 +/- 0.0000
Ecliptic YDOT -0.00257612 +/- 0.0000
Ecliptic ZDOT 0.00054606 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.26091601 +/- 0.0020
Geocenter to KBO 38.27364437 +/- 0.0021
# Hcoef: 8.78
The following table shows the complete astrometric record for 19EV9. 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 (19EV9) followed by the observatory code and reference code for the source of the astrometry.
2013 03 14.321921 11 11 36.31 +05 18 32.1 19EV9 695 C~8Sg4 2013 03 14.432025 11 11 35.78 +05 18 35.4 19EV9 695 C~8Sg4 2017 03 23.210334 11 34 22.44 +04 10 52.5 19EV9 W84 C~8Sg4 2017 03 24.211438 11 34 17.79 +04 11 25.1 19EV9 W84 C~8Sg4 2018 03 18.47337 11 40 33.90 +03 49 43.5 24.3i 19EV9 T09 C~8Sg4 2018 03 18.50304 11 40 33.77 +03 49 44.2 24.8i 19EV9 T09 C~8Sg4 2018 03 18.57604 11 40 33.43 +03 49 46.9 24.5i 19EV9 T09 C~8Sg5 2018 04 24.36908 11 37 57.93 +04 07 49.3 24.2z 19EV9 T09 C~8Sg5 2018 04 24.39881 11 37 57.84 +04 07 49.8 23.9z 19EV9 T09 C~8Sg5 2018 04 24.49338 11 37 57.47 +04 07 52.2 24.1z 19EV9 T09 C~8Sg5 2019 02 02.653403 11 49 24.39 +03 08 16.4 19EV9 T09 C~8Sg5 2019 02 04.58665 11 49 18.23 +03 09 06.4 25.3g 19EV9 T09 C~8Sg5 2019 02 04.59733 11 49 18.21 +03 09 06.8 25.6g 19EV9 T09 C~8Sg5 2019 02 04.63104 11 49 18.09 +03 09 07.4 25.3g 19EV9 T09 C~8Sg5 2019 02 04.66041 11 49 18.01 +03 09 08.3 25.9g 19EV9 T09 C~8Sg5 2019 02 05.471236 11 49 15.36 +03 09 29.6 19EV9 T09 C~8Sg5 2019 02 05.511564 11 49 15.22 +03 09 30.9 19EV9 T09 C~8Sg5 2019 03 08.34835 11 47 08.83 +03 25 27.4 25.0r 19EV9 T09 C~8Sg5 2019 03 08.37068 11 47 08.72 +03 25 28.0 24.8r 19EV9 T09 C~8Sg5 2019 03 08.40222 11 47 08.59 +03 25 29.2 24.6r 19EV9 T09 C~8Sg5 2019 03 08.40431 11 47 08.56 +03 25 29.4 24.2r 19EV9 T09 C~8Sg5
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 -0.03 0.00 0.10
2 0.0003 0.00 -0.01 0.00 -0.24
3 4.0243 0.00 0.12 0.00 0.21
4 4.0271 0.00 0.09 0.00 0.13
5 5.0107 0.00 -0.18 0.00 0.13
6 5.0108 0.00 0.00 0.00 -0.16
7 5.0110 0.00 0.14 0.00 0.10
8 5.1117 0.00 0.02 0.00 0.08
9 5.1118 0.00 0.22 0.00 -0.11
10 5.1120 0.00 -0.44 0.00 0.11
11 5.8900 0.00 -0.02 0.00 0.09
12 5.8953 0.00 -0.25 0.00 0.05
13 5.8953 0.00 -0.02 0.00 0.17
14 5.8954 0.00 -0.13 0.00 -0.11
15 5.8955 0.00 0.13 0.00 0.01
16 5.8977 0.00 0.04 0.00 -0.15
17 5.8978 0.00 -0.00 0.00 0.08
18 5.9823 0.00 0.06 0.00 -0.11
19 5.9823 0.00 -0.01 0.00 -0.26
20 5.9824 0.00 0.27 0.00 -0.12
21 5.9824 0.00 -0.04 0.00 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.
19EV9 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.313 39.313 39.313 ecceobj 0.072 0.072 0.072 incobj 11.495 11.495 11.495 qmin 35.776 35.779 35.774 qmax 43.606 43.626 43.593 amean 39.462 39.462 39.462 amin 39.028 39.026 39.028 amax 39.938 39.914 39.919 emean 0.066 0.066 0.066 emin 0.036 0.036 0.036 emax 0.093 0.093 0.092 imean 11.590 11.535 11.586 imin 10.425 10.309 10.425 imax 13.214 13.219 13.213 excite_mean 0.212 0.211 0.212 fracstop 1.000 1.000 1.000 cjmean 3.001 3.002 3.001 libcent 0 179.3 179.2 179.5 libamp 0 118.4 119.7 118.5 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 180.0 179.6 179.5 kozaiamp 180.0 180.0 180.0