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: 88269 # Created Thu Nov 21 02:06:50 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 19 observations of 19 # Arc: 4.94y # First observation: 2001/05/22 # Last observation: 2006/05/02 # Chi-squared of fit: 85.48 DOF: 32 RMS: 0.37 # Min/Max residuals: -0.47 1.07 # Exact a, adot, b, bdot, g, gdot: 2.321612E-05 6.411761E-02 5.017899E-07 -4.683485E-03 4.649719E-02 -1.436591E-02 # 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 -1.507937 -147.278165 -0.496407 -0.023526 -0.889445 2452052.484873 # Heliocentric elements and errors Epoch: 2452052.5000 = 2001/05/23 Mean Anomaly: 315.81155 +/- 0.000 Argument of Peri: 266.73519 +/- 0.000 Long of Asc Node: 14.63315 +/- 0.000 Inclination: 4.36207 +/- 0.000 Eccentricity: 0.23571361 +/- 0.0000 Semi-Major Axis: 25.86771399 +/- 0.0000 Time of Perihelion: 2457951.0030 +/- 0.0 Perihelion: 19.77034182 +/- 0.0000 Aphelion: 31.96508616 +/- 0.0000 Period (y) 131.5665 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -18.56389884 +/- 0.0000 Ecliptic Y -12.51530283 +/- 0.0000 Ecliptic Z -0.56596378 +/- 0.0000 Ecliptic XDOT 0.00274993 +/- 0.0000 Ecliptic YDOT -0.00271294 +/- 0.0000 Ecliptic ZDOT -0.00025322 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 22.39588459 +/- 0.0000 Geocenter to KBO 21.50681732 +/- 0.0000 # Hcoef: 9.51
The following table shows the complete astrometric record for 88269. 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 (88269) followed by the observatory code and reference code for the source of the astrometry.
2001 05 22.98413 13 59 57.01 -13 49 58.7 23.2R 88269 807 Cd1817 2001 05 23.08099 13 59 56.35 -13 49 55.3 88269 807 Cd1817 2001 05 29.19891 13 59 15.99 -13 46 21.7 23.0R 88269 695 Cd1817 2001 05 29.27459 13 59 15.53 -13 46 19.6 88269 695 Cd1817 2001 06 09.00264 13 58 15.12 -13 40 53.4 22.1R 88269 304 Cd1817 2001 06 09.05179 13 58 14.88 -13 40 52.1 88269 304 Cd1817 2001 07 19.98530 13 56 59.39 -13 33 16.8 88269 309 Cd3323 2001 07 20.01280 13 56 59.45 -13 33 17.0 88269 309 Cd3323 2002 04 07.40800 14 20 18.26 -15 50 07.4 22.0R 88269 807 Cf4617 2002 04 08.12888 14 20 12.65 -15 49 43.1 88269 807 Cf4617 2002 04 08.21516 14 20 11.98 -15 49 40.2 88269 807 Cf4617 2003 03 03.60741 14 38 25.88 -17 29 42.5 88269 568 Ch5853 2003 03 03.64092 14 38 25.78 -17 29 42.1 88269 568 Ch5853 2004 05 26.17962 14 43 36.66 -18 16 20.6 22.9R 88269 304 Ck8652 2004 05 26.21205 14 43 36.40 -18 16 19.1 88269 304 Ck8652 2006 05 02.42003 15 19 57.54 -21 16 59.5 22.5R 88269 250 S~06GW 2006 05 02.42443 15 19 57.49 -21 16 59.3 88269 250 S~06GW 2006 05 02.42883 15 19 57.45 -21 16 59.2 88269 250 S~06GW 2006 05 02.43322 15 19 57.41 -21 16 59.1 88269 250 S~06GW
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 -0.43 0.00 -0.31
2 0.0003 0.00 -0.11 0.00 -0.40
3 0.0170 0.00 -0.11 0.00 0.06
4 0.0172 0.00 0.27 0.00 -0.37
5 0.0466 0.00 -0.14 0.00 -0.05
6 0.0467 0.00 0.03 0.00 -0.08
7 0.1588 0.00 -0.35 0.00 -0.32
8 0.1589 0.00 -0.01 0.00 -0.35
9 0.8745 0.00 -0.14 0.00 0.38
10 0.8765 0.00 0.09 0.00 -0.06
11 0.8767 0.00 0.42 0.00 -0.11
12 1.7786 0.00 0.07 0.00 0.56
13 1.7787 0.00 0.19 0.00 0.75
14 3.0094 0.00 0.38 0.00 0.74
15 3.0095 0.00 0.44 0.00 1.07
16 4.9430 0.00 0.26 0.00 -0.47
17 4.9430 0.00 0.10 0.00 -0.39
18 4.9430 0.00 0.10 0.00 -0.42
19 4.9431 0.00 0.09 0.00 -0.45
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.
88269 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 25.838 25.838 25.838 ecceobj 0.236 0.236 0.236 incobj 4.368 4.368 4.368 qmin 19.646 19.225 18.658 qmax 32.845 32.839 32.850 amean 26.089 25.867 25.326 amin 25.235 24.400 24.303 amax 26.540 26.541 26.535 emean 0.227 0.209 0.215 emin 0.207 0.169 0.186 emax 0.244 0.244 0.244 imean 6.012 7.621 7.566 imin 4.720 4.720 4.720 imax 6.973 9.487 9.203 excite_mean 0.251 0.249 0.253 fracstop 0.004 0.006 0.012 cjmean 2.956 2.959 2.965 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 306.3 226.0 167.7 kozaiamp 41.4 179.5 178.8