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: 19EU7
# Created Wed Dec 25 02:11:01 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 22 observations of 22
# Arc: 10.12y
# First observation: 2009/01/23
# Last observation: 2019/03/08
# Chi-squared of fit: 9.23 DOF: 38 RMS: 0.11
# Min/Max residuals: -0.17 0.24
# Exact a, adot, b, bdot, g, gdot:
1.592409E-05 2.274825E-02 -3.351566E-07 -5.317125E-05 2.359225E-02 -1.711432E-03
# Covariance matrix:
7.3425E-13 -1.5402E-13 -1.3854E-17 1.7256E-16 -7.9139E-14 -3.4229E-13
-1.5402E-13 1.3163E-12 2.0752E-15 -3.8859E-15 2.2608E-12 5.2981E-12
-1.3854E-17 2.0752E-15 7.1842E-13 -7.3587E-14 4.2120E-15 8.2334E-15
1.7256E-16 -3.8859E-15 -7.3587E-14 8.2526E-15 -7.0814E-15 -1.5639E-14
-7.9139E-14 2.2608E-12 4.2120E-15 -7.0814E-15 4.2367E-12 9.0666E-12
-3.4229E-13 5.2981E-12 8.2334E-15 -1.5639E-14 9.0666E-12 2.1485E-11
# lat0 lon0 xBary yBary zBary JD0
3.241866 164.906131 0.655684 0.041933 -0.739632 2454854.936257
# Heliocentric elements and errors
Epoch: 2454854.5000 = 2009/01/23
Mean Anomaly: 286.55389 +/- 0.082
Argument of Peri: 175.59365 +/- 0.086
Long of Asc Node: 72.46988 +/- 0.004
Inclination: 3.18725 +/- 0.000
Eccentricity: 0.09366243 +/- 0.0002
Semi-Major Axis: 43.93384973 +/- 0.0126
Time of Perihelion: 2476554.6948 +/- 43.9
Perihelion: 39.81889851 +/- 0.0155
Aphelion: 48.04880096 +/- 0.0173
Period (y) 291.2105 +/- 0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.40143441 +/- 0.0036
Ecliptic Y 11.84078473 +/- 0.0010
Ecliptic Z 2.39699129 +/- 0.0002
Ecliptic XDOT -0.00049088 +/- 0.0000
Ecliptic YDOT -0.00259727 +/- 0.0000
Ecliptic ZDOT -0.00001750 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.12810723 +/- 0.0034
Geocenter to KBO 42.38686740 +/- 0.0037
# Hcoef: 7.46
The following table shows the complete astrometric record for 19EU7. 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 (19EU7) followed by the observatory code and reference code for the source of the astrometry.
2009 01 23.435491 11 09 28.30 +08 56 03.2 19EU7 T09 C~870X 2009 01 23.494395 11 09 28.13 +08 56 04.3 19EU7 T09 C~870X 2018 03 18.48012 11 50 09.19 +04 31 30.1 23.2i 19EU7 T09 C~870X 2018 03 18.55199 11 50 08.87 +04 31 31.8 22.9i 19EU7 T09 C~870X 2018 03 18.59206 11 50 08.70 +04 31 33.1 22.9i 19EU7 T09 C~870X 2018 04 12.112846 11 48 23.256 +04 42 23.87 24.7V 19EU7 W84 C~8HR7 2018 04 13.110564 11 48 19.313 +04 42 46.98 23.8V 19EU7 W84 C~8HR7 2018 04 24.37585 11 47 37.96 +04 46 42.2 23.2z 19EU7 T09 C~870X 2018 04 24.41489 11 47 37.84 +04 46 42.8 22.7z 19EU7 T09 C~870X 2018 04 24.49874 11 47 37.53 +04 46 44.5 23.6z 19EU7 T09 C~870X 2019 02 04.565972 11 57 54.56 +03 38 44.4 19EU7 T09 C~870X 2019 02 04.643619 11 57 54.32 +03 38 46.1 19EU7 T09 C~870X 2019 03 02.45121 11 56 19.61 +03 50 02.8 23.3y 19EU7 T09 C~83GA 2019 03 02.53504 11 56 19.25 +03 50 05.4 22.9y 19EU7 T09 C~83GA 2019 03 02.57800 11 56 19.07 +03 50 06.5 23.0y 19EU7 T09 C~83GA 2019 03 02.61624 11 56 18.90 +03 50 07.5 23.1y 19EU7 T09 C~83GA 2019 03 07.57007 11 55 57.67 +03 52 31.2 23.2y 19EU7 T09 C~83GA 2019 03 07.58345 11 55 57.59 +03 52 31.5 23.0y 19EU7 T09 C~83GA 2019 03 07.62089 11 55 57.43 +03 52 32.5 23.2y 19EU7 T09 C~83GA 2019 03 08.37278 11 55 54.19 +03 52 54.6 25.0r 19EU7 T09 C~83GA 2019 03 08.40641 11 55 54.02 +03 52 55.6 24.5r 19EU7 T09 C~83GA 2019 03 08.41689 11 55 53.99 +03 52 55.9 25.0r 19EU7 T09 C~83GA
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 -0.11 0.00 0.11
2 0.0002 0.00 0.11 0.00 -0.13
3 9.1473 0.00 -0.05 0.00 0.24
4 9.1475 0.00 0.05 0.00 -0.12
5 9.1476 0.00 0.22 0.00 0.03
6 9.2147 0.00 -0.13 0.00 0.05
7 9.2175 0.00 -0.13 0.00 0.03
8 9.2483 0.00 -0.03 0.00 -0.01
9 9.2484 0.00 0.20 0.00 -0.13
10 9.2486 0.00 -0.13 0.00 0.02
11 10.0318 0.00 0.01 0.00 0.07
12 10.0321 0.00 -0.05 0.00 0.02
13 10.1027 0.00 -0.11 0.00 -0.13
14 10.1029 0.00 -0.10 0.00 0.07
15 10.1031 0.00 -0.03 0.00 -0.07
16 10.1032 0.00 -0.12 0.00 -0.17
17 10.1167 0.00 0.20 0.00 0.05
18 10.1168 0.00 -0.12 0.00 -0.04
19 10.1169 0.00 -0.04 0.00 -0.12
20 10.1189 0.00 0.23 0.00 0.06
21 10.1190 0.00 -0.08 0.00 0.08
22 10.1190 0.00 0.16 0.00 0.08
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.
19EU7 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.905 43.905 43.905 ecceobj 0.089 0.089 0.089 incobj 3.186 3.186 3.186 qmin 39.482 39.523 39.481 qmax 48.861 48.858 48.890 amean 44.084 44.084 44.084 amin 43.735 43.732 43.737 amax 44.465 44.462 44.458 emean 0.083 0.083 0.083 emin 0.067 0.066 0.067 emax 0.100 0.100 0.100 imean 1.446 1.446 1.445 imin 0.602 0.602 0.602 imax 2.107 2.107 2.107 excite_mean 0.087 0.087 0.087 fracstop 1.000 1.000 1.000 cjmean 3.093 3.093 3.093 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 204.2 204.3 204.1 kozaiamp 180.0 180.0 179.9