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: 03QU91
# Created Sun Dec 22 02:08:31 2024
# Orbit generated from Bernstein formalism
# Fitting 7 observations of 7
# Arc: 57.87d
# First observation: 2003/08/25
# Last observation: 2003/10/22
Preliminary a, adot, b, bdot, g, gdot:
-0.000003 0.041852 0.000002 0.012898 0.029721 0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit: 9.26 DOF: 9 RMS: 0.20
# Min/Max residuals: -0.39 0.41
# Exact a, adot, b, bdot, g, gdot:
1.276014E-05 2.278570E-02 9.542939E-06 1.290713E-02 2.665212E-02 1.638852E-02
# Covariance matrix:
1.1151E-12 1.4494E-09 -2.3111E-14 -4.7273E-12 2.2671E-10 -4.4729E-09
1.4494E-09 3.7033E-06 -4.9450E-11 -1.8458E-08 5.6661E-07 -1.4606E-05
-2.3111E-14 -4.9450E-11 4.9767E-13 -3.1952E-12 -7.9068E-12 9.8918E-11
-4.7273E-12 -1.8458E-08 -3.1952E-12 2.5903E-10 -2.5934E-09 1.3783E-07
2.2671E-10 5.6661E-07 -7.9068E-12 -2.5934E-09 8.7102E-08 -2.1194E-06
-4.4729E-09 -1.4606E-05 9.8918E-11 1.3783E-07 -2.1194E-06 9.0120E-05
# lat0 lon0 xBary yBary zBary JD0
1.627806 -4.948512 0.403776 0.026523 -0.930965 2452876.870633
# Heliocentric elements and errors
Epoch: 2452870.5000 = 2003/08/19
Mean Anomaly: 30.14379 +/- 25.222
Argument of Peri: 268.07184 +/- 6.495
Long of Asc Node: 351.64448 +/- 0.235
Inclination: 29.49508 +/- 2.003
Eccentricity: 0.58258610 +/- 0.3345
Semi-Major Axis: 55.15803508 +/- 29.3060
Time of Perihelion: 2440341.7719 +/- 3193.1
Perihelion: 23.02373077 +/- 22.1361
Aphelion: 87.29233940 +/- 49.9140
Period (y) 409.6579 +/- 326.48
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 38.25577939 +/- 0.4138
Ecliptic Y -3.71373925 +/- 0.0358
Ecliptic Z 1.06616605 +/- 0.0118
Ecliptic XDOT 0.00183570 +/- 0.0010
Ecliptic YDOT 0.00218431 +/- 0.0002
Ecliptic ZDOT 0.00137335 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 38.45039955 +/- 0.4117
Geocenter to KBO 37.52046428 +/- 0.4155
# Hcoef: 7.14
The following table shows the complete astrometric record for 03QU91. 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 (03QU91) followed by the observatory code and reference code for the source of the astrometry.
2003 08 25.36989 23 39 15.03 -00 28 18.8 22.1R 03QU91 807 Ci4137 2003 08 26.29153 23 39 10.66 -00 28 38.4 03QU91 807 Ci4137 2003 08 26.39615 23 39 10.11 -00 28 40.5 03QU91 807 Ci4137 2003 10 19.20231 23 34 45.14 -00 50 23.5 23.4V 03QU91 645 C~2Jx8 2003 10 19.20604 23 34 45.14 -00 50 23.5 23.2V 03QU91 645 C~2Jx8 2003 10 22.16381 23 34 32.83 -00 51 24.8 22.8R 03QU91 695 Cj4699 2003 10 22.24392 23 34 32.50 -00 51 26.6 03QU91 695 Cj4699
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 0.16 0.00 -0.39
2 0.0025 -67.95 0.19 7.98 -0.02
3 0.0028 -76.35 -0.35 9.32 0.41
4 0.1501 -4242.24 -0.13 387.68 0.04
5 0.1501 -4242.24 0.12 387.68 0.02
6 0.1582 -4436.14 0.02 404.53 0.06
7 0.1585 -4441.40 -0.01 404.84 -0.12
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.
03QU91 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0