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: 91133
# Created Sun Dec 22 02:06:51 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 31 observations of 31
# Arc: 3.22y
# First observation: 1998/04/28
# Last observation: 2001/07/19
# Chi-squared of fit: 14.81 DOF: 56 RMS: 0.12
# Min/Max residuals: -0.35 0.34
# Exact a, adot, b, bdot, g, gdot:
1.907037E-05 4.277997E-02 -1.838441E-06 -4.452724E-03 3.402424E-02 1.370325E-04
# Covariance matrix:
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
# lat0 lon0 xBary yBary zBary JD0
0.043944 -129.754927 0.220962 0.000520 -0.987434 2450931.999271
# Heliocentric elements and errors
Epoch: 2450932.5000 = 1998/04/29
Mean Anomaly: 358.84794 +/- 0.000
Argument of Peri: 181.47034 +/- 0.000
Long of Asc Node: 50.25181 +/- 0.000
Inclination: 5.95050 +/- 0.000
Eccentricity: 0.22680477 +/- 0.0000
Semi-Major Axis: 39.28197342 +/- 0.0000
Time of Perihelion: 2451220.2814 +/- 0.0
Perihelion: 30.37263462 +/- 0.0000
Aphelion: 48.19131222 +/- 0.0000
Period (y) 246.2057 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -19.58822848 +/- 0.0000
Ecliptic Y -23.21597206 +/- 0.0000
Ecliptic Z 0.02251486 +/- 0.0000
Ecliptic XDOT 0.00264120 +/- 0.0000
Ecliptic YDOT -0.00220139 +/- 0.0000
Ecliptic ZDOT -0.00035838 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 30.37566091 +/- 0.0000
Geocenter to KBO 29.39084007 +/- 0.0000
# Hcoef: 7.62
The following table shows the complete astrometric record for 91133. 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 (91133) followed by the observatory code and reference code for the source of the astrometry.
1998 04 28.49854 15 11 15.66 -17 45 51.5 22.1R 91133 568 Ca4825 1998 04 28.53791 15 11 15.40 -17 45 50.6 22.1R 91133 568 Ca4825 1998 04 28.57687 15 11 15.15 -17 45 49.7 22.1R 91133 568 Ca4825 1998 04 30.42507 15 11 03.47 -17 45 08.2 22.1R 91133 568 Ca4825 1998 04 30.44055 15 11 03.37 -17 45 07.8 22.1R 91133 568 Ca4825 1998 05 22.40111 15 08 42.13 -17 36 41.6 22.1R 91133 568 Ca4825 1998 05 22.40926 15 08 42.08 -17 36 41.4 22.1R 91133 568 Ca4825 1998 05 22.41742 15 08 42.01 -17 36 41.2 22.1R 91133 568 Ca4825 1998 06 29.39329 15 05 23.52 -17 24 56.5 22.1R 91133 568 Ca4825 1998 06 30.38951 15 05 19.92 -17 24 44.4 22.1R 91133 568 Ca4825 1998 07 01.43602 15 05 16.25 -17 24 32.0 22.1R 91133 568 Ca4825 1999 03 13.59082 15 24 28.79 -18 49 53.5 21.8R 91133 568 Ca4825 1999 03 14.58160 15 24 26.48 -18 49 47.8 21.8R 91133 568 Ca4825 1999 04 08.56052 15 22 51.41 -18 45 09.8 21.8R 91133 568 Ca4825 1999 04 08.58311 15 22 51.29 -18 45 09.3 21.8R 91133 568 Ca4825 1999 05 22.31252 15 18 23.33 -18 30 23.4 22.1R 91133 697 Cb0746 1999 05 22.35266 15 18 23.06 -18 30 22.3 22.0R 91133 697 Cb0746 1999 05 23.30755 15 18 16.94 -18 30 01.6 21.6R 91133 697 Cb0746 2000 04 07.62459 15 32 35.21 -19 35 40.9 22.3R 91133 568 Cb1843 2000 04 07.62926 15 32 35.18 -19 35 41.0 22.3R 91133 568 Cb1843 2000 04 07.63392 15 32 35.16 -19 35 40.9 22.5R 91133 568 Cb1843 2000 04 07.63859 15 32 35.14 -19 35 40.8 22.5R 91133 568 Cb1843 2000 04 30.58301 15 30 24.63 -19 29 13.7 22.1R 91133 568 Cb5090 2000 04 30.60086 15 30 24.52 -19 29 13.3 22.1R 91133 568 Cb5090 2000 05 01.54937 15 30 18.50 -19 28 55.0 22.2R 91133 568 Cb5090 2000 05 01.56719 15 30 18.40 -19 28 54.3 22.1R 91133 568 Cb5091 2000 05 01.59122 15 30 18.25 -19 28 54.0 22.1R 91133 568 Cb5091 2000 05 07.49642 15 29 40.20 -19 26 56.2 22.3R 91133 568 Cb5091 2000 05 07.53809 15 29 39.93 -19 26 55.5 22.4R 91133 568 Cb5091 2001 07 18.38355 15 33 08.491 -19 57 02.33 91133 568 Cl5160 2001 07 19.36575 15 33 06.214 -19 56 55.73 91133 568 Cl5160
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 -0.09
2 0.0001 0.00 0.05 0.00 -0.08
3 0.0002 0.00 0.04 0.00 -0.06
4 0.0053 0.00 0.06 0.00 -0.10
5 0.0053 0.00 0.06 0.00 -0.05
6 0.0654 0.00 -0.12 0.00 0.04
7 0.0655 0.00 -0.08 0.00 0.05
8 0.0655 0.00 -0.35 0.00 0.07
9 0.1695 0.00 -0.05 0.00 -0.11
10 0.1722 0.00 -0.03 0.00 -0.16
11 0.1751 0.00 0.03 0.00 -0.08
12 0.8736 0.00 0.18 0.00 -0.04
13 0.8763 0.00 0.23 0.00 0.05
14 0.9447 0.00 0.05 0.00 -0.10
15 0.9448 0.00 0.00 0.00 0.04
16 1.0645 0.00 0.16 0.00 0.12
17 1.0646 0.00 0.05 0.00 0.34
18 1.0672 0.00 0.11 0.00 0.18
19 1.9442 0.00 -0.03 0.00 0.15
20 1.9442 0.00 -0.13 0.00 -0.02
21 1.9442 0.00 -0.09 0.00 0.02
22 1.9443 0.00 -0.04 0.00 0.05
23 2.0071 0.00 -0.06 0.00 0.01
24 2.0071 0.00 0.00 0.00 0.06
25 2.0097 0.00 -0.19 0.00 -0.10
26 2.0098 0.00 0.04 0.00 0.24
27 2.0098 0.00 0.11 0.00 0.07
28 2.0260 0.00 -0.07 0.00 -0.00
29 2.0261 0.00 0.02 0.00 -0.16
30 3.2221 0.00 0.02 0.00 -0.11
31 3.2248 0.00 0.15 0.00 -0.30
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.
91133 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.105 39.105 39.105 ecceobj 0.223 0.223 0.223 incobj 5.956 5.956 5.956 qmin 28.921 28.921 28.921 qmax 50.296 50.295 50.296 amean 39.455 39.455 39.455 amin 39.059 39.059 39.059 amax 39.924 39.924 39.924 emean 0.240 0.240 0.240 emin 0.212 0.212 0.212 emax 0.264 0.264 0.264 imean 4.474 4.474 4.473 imin 1.792 1.792 1.791 imax 7.195 7.195 7.195 excite_mean 0.254 0.254 0.254 fracstop 1.000 1.000 1.000 cjmean 2.978 2.978 2.978 libcent 0 179.7 179.7 179.7 libamp 0 49.4 49.4 49.4 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 88.5 88.6 88.5 kozaiamp 84.4 84.4 84.4