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: 09DQ143
# Created Wed Nov 27 02:08:58 2024
# Orbit generated from Bernstein formalism
# Fitting 8 observations of 8
# Arc: 34.85d
# First observation: 2009/02/18
# Last observation: 2009/03/25
Preliminary a, adot, b, bdot, g, gdot:
0.000001 0.015391 -0.000001 -0.001587 0.018924 0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit: 0.46 DOF: 11 RMS: 0.04
# Min/Max residuals: -0.11 0.06
# Exact a, adot, b, bdot, g, gdot:
1.137194E-05 1.310302E-02 -1.235995E-06 -1.466633E-03 1.846942E-02 -8.966336E-03
# Covariance matrix:
4.3017E-13 1.3968E-10 -8.2319E-14 -7.5768E-12 2.8515E-11 2.7834E-09
1.3968E-10 6.3353E-07 -2.9968E-10 -3.2939E-08 1.1068E-07 3.0325E-06
-8.2319E-14 -2.9968E-10 4.0407E-13 1.1511E-11 -5.2729E-11 -1.6539E-09
-7.5768E-12 -3.2939E-08 1.1511E-11 1.9286E-09 -5.7591E-09 -1.5925E-07
2.8515E-11 1.1068E-07 -5.2729E-11 -5.7591E-09 1.9428E-08 5.8191E-07
2.7834E-09 3.0325E-06 -1.6539E-09 -1.5925E-07 5.8191E-07 4.6610E-05
# lat0 lon0 xBary yBary zBary JD0
9.737300 -175.419386 0.566201 0.137922 -0.803683 2454881.111464
# Heliocentric elements and errors
Epoch: 2454880.5000 = 2009/02/18
Mean Anomaly: 306.58292 +/- 45.320
Argument of Peri: 245.28890 +/- 15.242
Long of Asc Node: 59.97869 +/- 1.234
Inclination: 11.52418 +/- 0.165
Eccentricity: 0.57346747 +/- 0.3229
Semi-Major Axis: 57.11871552 +/- 28.1979
Time of Perihelion: 2478276.6134 +/- 9688.1
Perihelion: 24.36299028 +/- 22.0184
Aphelion: 89.87444077 +/- 48.0490
Period (y) 431.6938 +/- 319.67
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -54.04872503 +/- 0.4014
Ecliptic Y -3.76740819 +/- 0.0322
Ecliptic Z 9.15730882 +/- 0.0691
Ecliptic XDOT 0.00142961 +/- 0.0010
Ecliptic YDOT -0.00183119 +/- 0.0002
Ecliptic ZDOT -0.00043918 +/- 0.0002
# Distances at JD0 (AU)
Heliocenter to KBO 54.94828793 +/- 0.3950
Geocenter to KBO 54.14356409 +/- 0.4086
# Hcoef: 7.92
The following table shows the complete astrometric record for 09DQ143. 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 (09DQ143) followed by the observatory code and reference code for the source of the astrometry.
2009 02 18.610698 12 32 19.470 +07 06 54.82 24.8i 09DQ143 568 C~0aRR 2009 02 18.648391 12 32 19.370 +07 06 55.72 24.3i 09DQ143 568 C~0aRR 2009 02 22.566072 12 32 08.344 +07 08 30.06 26.9g 09DQ143 568 C~0aRR 2009 02 22.622360 12 32 08.183 +07 08 31.44 25.0g 09DQ143 568 C~0aRR 2009 02 23.514308 12 32 05.589 +07 08 53.10 25.9g 09DQ143 568 C~0aRR 2009 02 23.570079 12 32 05.417 +07 08 54.49 09DQ143 568 C~0aRR 2009 02 23.625785 12 32 05.249 +07 08 55.70 26.2g 09DQ143 568 C~0aRR 2009 03 25.462412 12 30 24.492 +07 20 57.91 09DQ143 568 C~0aRR
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 -0.00
2 0.0001 -1.72 0.03 0.23 0.03
3 0.0108 -189.86 -0.07 21.14 -0.01
4 0.0110 -192.61 -0.00 21.45 0.04
5 0.0134 -236.65 0.06 25.89 0.03
6 0.0136 -239.56 -0.01 26.14 0.03
7 0.0137 -242.33 0.03 26.25 -0.11
8 0.0954 -1905.31 -0.00 90.19 0.00
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.
09DQ143 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