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: 02CD251
# Created Wed Dec 25 02:08:15 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 24 observations of 24
# Arc: 19.02y
# First observation: 2002/02/08
# Last observation: 2021/02/15
# Chi-squared of fit: 55.07 DOF: 42 RMS: 0.27
# Min/Max residuals: -0.92 0.92
# Exact a, adot, b, bdot, g, gdot:
1.508378E-05 2.319922E-02 1.389290E-08 -8.935592E-05 2.406064E-02 3.532184E-04
# Covariance matrix:
1.4396E-13 -2.8710E-14 1.8018E-16 6.6121E-17 7.1356E-14 -4.8611E-14
-2.8710E-14 2.2002E-14 1.4266E-16 -8.0808E-17 1.4271E-14 4.6313E-14
1.8018E-16 1.4266E-16 9.7696E-14 -6.8951E-15 1.3287E-15 3.2364E-16
6.6121E-17 -8.0808E-17 -6.8951E-15 1.3361E-15 -1.2714E-16 -1.8132E-16
7.1356E-14 1.4271E-14 1.3287E-15 -1.2714E-16 3.3126E-13 3.3010E-14
-4.8611E-14 4.6313E-14 3.2364E-16 -1.8132E-16 3.3010E-14 1.0379E-13
# lat0 lon0 xBary yBary zBary JD0
1.445816 147.583643 0.137800 0.024501 -0.973802 2452313.721073
# Heliocentric elements and errors
Epoch: 2452314.5000 = 2002/02/09
Mean Anomaly: 66.57881 +/- 0.231
Argument of Peri: 30.38158 +/- 0.240
Long of Asc Node: 48.77692 +/- 0.004
Inclination: 1.42875 +/- 0.000
Eccentricity: 0.01561416 +/- 0.0000
Semi-Major Axis: 42.79441899 +/- 0.0040
Time of Perihelion: 2433403.5801 +/- 65.6
Perihelion: 42.12621992 +/- 0.0042
Aphelion: 43.46261806 +/- 0.0043
Period (y) 279.9554 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -35.82170162 +/- 0.0008
Ecliptic Y 22.91632743 +/- 0.0005
Ecliptic Z 1.04866960 +/- 0.0000
Ecliptic XDOT -0.00145776 +/- 0.0000
Ecliptic YDOT -0.00220750 +/- 0.0000
Ecliptic ZDOT -0.00000894 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.53764569 +/- 0.0008
Geocenter to KBO 41.56166363 +/- 0.0010
# Hcoef: 7.07
The following table shows the complete astrometric record for 02CD251. 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 (02CD251) followed by the observatory code and reference code for the source of the astrometry.
2002 02 08.22033 10 01 08.51 +13 40 09.4 23.0R 02CD251 695 Cf5629 2002 02 08.31382 10 01 08.07 +13 40 11.9 02CD251 695 Cf5629 2002 03 18.17516 09 58 16.74 +13 55 09.5 23.2R 02CD251 695 Cf5629 2002 03 18.23602 09 58 16.55 +13 55 10.7 02CD251 695 Cf5629 2002 04 06.16343 09 57 11.67 +14 00 27.1 02CD251 696 Cf5629 2002 04 06.22481 09 57 11.50 +14 00 27.7 02CD251 696 Cf5629 2002 04 06.25210 09 57 11.42 +14 00 28.5 02CD251 696 Cf5629 2003 01 28.403760 10 07 05.71 +13 07 26.6 22.8V 02CD251 645 C~2Jx6 2003 01 28.404589 10 07 05.69 +13 07 26.4 22.2V 02CD251 645 C~2Jx6 2003 01 28.407077 10 07 05.70 +13 07 26.4 24.4V 02CD251 645 C~2Jx6 2003 03 07.20235 10 04 12.18 +13 23 13.5 22.6R 02CD251 662 Ck0860 2003 03 07.37417 10 04 11.40 +13 23 17.0 02CD251 662 Ck0860 2003 12 18.51995 10 14 15.81 +12 26 24.3 23.5R 02CD251 568 Ck9583 2003 12 18.61373 10 14 15.68 +12 26 25.2 02CD251 568 Ck9583 2004 02 22.33208 10 10 19.34 +12 49 26.6 23.1R 02CD251 695 Ck0860 2004 02 22.38762 10 10 19.09 +12 49 28.1 02CD251 695 Ck0860 2005 03 11.20766 10 14 04.48 +12 28 02.1 23.2R 02CD251 695 Cn0182 2005 03 11.27192 10 14 04.17 +12 28 04.0 02CD251 695 Cn0182 2013 03 13.33704 10 53 48.62 +08 29 42.9 23.0R 02CD251 695 C~0ucs 2013 03 14.31075 10 53 44.29 +08 30 08.8 02CD251 695 C~0ucs 2013 03 14.42080 10 53 43.79 +08 30 11.7 02CD251 695 C~0ucs 2021 02 15.360070 11 34 38.097 +04 04 13.90 23.4G 02CD251 G37 C~4YpU 2021 02 15.443940 11 34 37.724 +04 04 15.89 02CD251 G37 C~4YpU 2021 02 15.510890 11 34 37.497 +04 04 17.31 02CD251 G37 C~4YpU
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 -0.03
2 0.0003 0.00 0.05 0.00 0.10
3 0.1039 0.00 -0.92 0.00 0.11
4 0.1041 0.00 -0.07 0.00 0.09
5 0.1559 0.00 0.29 0.00 -0.12
6 0.1561 0.00 0.40 0.00 -0.33
7 0.1561 0.00 0.38 0.00 0.12
8 0.9697 0.00 0.01 0.00 -0.04
9 0.9697 0.00 -0.24 0.00 -0.26
10 0.9697 0.00 0.08 0.00 -0.32
11 1.0732 0.00 0.06 0.00 0.92
12 1.0737 0.00 0.02 0.00 0.40
13 1.8571 0.00 -0.05 0.00 -0.06
14 1.8573 0.00 0.19 0.00 -0.13
15 2.0373 0.00 -0.14 0.00 -0.08
16 2.0374 0.00 0.07 0.00 -0.00
17 3.0855 0.00 0.02 0.00 -0.36
18 3.0857 0.00 -0.36 0.00 0.02
19 11.0914 0.00 0.10 0.00 0.00
20 11.0940 0.00 0.01 0.00 -0.04
21 11.0943 0.00 -0.07 0.00 -0.05
22 19.0202 0.00 0.22 0.00 0.25
23 19.0205 0.00 -0.38 0.00 0.07
24 19.0206 0.00 0.20 0.00 -0.23
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.
02CD251 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.519 42.519 42.519 ecceobj 0.015 0.015 0.015 incobj 1.429 1.429 1.429 qmin 40.513 40.515 40.512 qmax 44.902 44.902 44.900 amean 42.622 42.622 42.622 amin 42.301 42.302 42.300 amax 42.952 42.952 42.951 emean 0.026 0.026 0.026 emin 0.003 0.003 0.003 emax 0.046 0.046 0.046 imean 1.417 1.417 1.417 imin 0.232 0.233 0.232 imax 2.041 2.041 2.041 excite_mean 0.037 0.037 0.037 fracstop 1.000 1.000 1.000 cjmean 3.084 3.084 3.084 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 179.0 178.9 179.0 kozaiamp 180.0 180.0 180.0