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: 02CU154
# Created Wed Dec 25 02:08:14 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 28 observations of 28
# Arc: 20.17y
# First observation: 2002/02/06
# Last observation: 2022/04/08
# Chi-squared of fit: 109.54 DOF: 50 RMS: 0.35
# Min/Max residuals: -0.76 1.30
# Exact a, adot, b, bdot, g, gdot:
1.556096E-05 2.501188E-02 3.212923E-07 1.304549E-03 2.485974E-02 -3.021401E-04
# Covariance matrix:
1.8966E-13 -3.3966E-14 3.9934E-15 -1.3929E-15 6.2498E-14 -5.8216E-14
-3.3966E-14 1.2347E-14 -1.3665E-15 5.9422E-16 -2.2728E-15 2.3809E-14
3.9934E-15 -1.3665E-15 1.1338E-13 -9.2270E-15 2.8234E-15 -3.1597E-15
-1.3929E-15 5.9422E-16 -9.2270E-15 1.4263E-15 -2.5549E-16 1.3015E-15
6.2498E-14 -2.2728E-15 2.8234E-15 -2.5549E-16 1.6275E-13 -1.7039E-14
-5.8216E-14 2.3809E-14 -3.1597E-15 1.3015E-15 -1.7039E-14 5.2657E-14
# lat0 lon0 xBary yBary zBary JD0
1.563672 135.933510 -0.026670 0.026746 -0.982570 2452311.708613
# Heliocentric elements and errors
Epoch: 2452312.5000 = 2002/02/07
Mean Anomaly: 352.21516 +/- 0.011
Argument of Peri: 36.03678 +/- 0.012
Long of Asc Node: 108.85858 +/- 0.001
Inclination: 3.34675 +/- 0.000
Eccentricity: 0.06534016 +/- 0.0001
Semi-Major Axis: 44.05976422 +/- 0.0032
Time of Perihelion: 2454622.4832 +/- 11.7
Perihelion: 41.18089223 +/- 0.0037
Aphelion: 46.93863622 +/- 0.0041
Period (y) 292.4634 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -29.61675315 +/- 0.0005
Ecliptic Y 28.63583816 +/- 0.0005
Ecliptic Z 1.09768658 +/- 0.0000
Ecliptic XDOT -0.00189759 +/- 0.0000
Ecliptic YDOT -0.00200582 +/- 0.0000
Ecliptic ZDOT 0.00014293 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.21126923 +/- 0.0005
Geocenter to KBO 40.22572857 +/- 0.0007
# Hcoef: 6.99
The following table shows the complete astrometric record for 02CU154. 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 (02CU154) followed by the observatory code and reference code for the source of the astrometry.
2002 02 06.20787 09 15 31.36 +17 33 10.0 22.2R 02CU154 695 Cf0336 2002 02 06.30231 09 15 30.90 +17 33 12.0 02CU154 695 Cf0336 2002 02 07.25891 09 15 26.09 +17 33 34.5 02CU154 695 Cf0336 2002 03 08.39340 09 13 09.43 +17 43 46.3 21.7R 02CU154 568 Cf2717 2002 03 08.47157 09 13 09.11 +17 43 47.6 02CU154 568 Cf2717 2002 03 13.30877 09 12 49.93 +17 45 11.4 02CU154 696 Cf5529 2003 03 06.18484 09 19 09.39 +17 21 27.1 22.6R 02CU154 662 Ci0065 2003 03 06.27352 09 19 09.04 +17 21 29.0 02CU154 662 Ci0065 2003 04 29.28933 09 17 02.00 +17 29 56.5 23.2R 02CU154 568 Ci0065 2003 04 30.28578 09 17 02.08 +17 29 54.4 02CU154 568 Ci0065 2005 03 12.202045 09 30 17.59 +16 38 30.9 02CU154 645 C~1GLI 2005 03 12.202875 09 30 17.58 +16 38 31.0 02CU154 645 C~1GLI 2005 03 12.205362 09 30 17.57 +16 38 31.0 02CU154 645 C~1GLI 2006 05 01.20071 09 34 06.38 +16 23 19.3 23.2R 02CU154 695 Cr3562 2006 05 01.29035 09 34 06.36 +16 23 18.5 02CU154 695 Cr3562 2006 05 02.19662 09 34 06.24 +16 23 18.0 02CU154 695 Cr3562 2008 10 27.04263 09 58 21.96 +14 28 54.2 02CU154 250 S~06AS 2008 10 27.04888 09 58 21.94 +14 28 54.1 02CU154 250 S~06AS 2008 10 27.05583 09 58 21.97 +14 28 54.0 02CU154 250 S~06AS 2008 10 27.10305 09 58 22.12 +14 28 53.4 02CU154 250 S~06AS 2013 03 13.25950 10 15 37.91 +13 17 00.9 23.2R 02CU154 695 C~0ucs 2013 03 14.21830 10 15 33.70 +13 17 23.8 02CU154 695 C~0ucs 2013 03 14.36868 10 15 33.03 +13 17 27.5 02CU154 695 C~0ucs 2015 04 15.18755 10 24 48.17 +12 32 04.9 23.2R 02CU154 695 C~1RHO 2015 04 15.26016 10 24 47.99 +12 32 05.9 02CU154 695 C~1RHO 2015 04 15.33874 10 24 47.75 +12 32 06.7 02CU154 695 C~1RHO 2022 04 08.135600 11 03 23.970 +09 06 03.88 23.5G 02CU154 G37 C~5ZV2 2022 04 08.170400 11 03 23.849 +09 06 04.92 02CU154 G37 C~5ZV2
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 0.10 0.00 0.08
2 0.0003 0.00 0.40 0.00 -0.13
3 0.0029 0.00 0.04 0.00 0.18
4 0.0826 0.00 -0.27 0.00 -0.14
5 0.0829 0.00 -0.14 0.00 -0.21
6 0.0961 0.00 0.60 0.00 1.30
7 1.0759 0.00 0.27 0.00 0.06
8 1.0762 0.00 0.84 0.00 0.26
9 1.2240 0.00 -0.72 0.00 0.08
10 1.2268 0.00 -0.67 0.00 0.09
11 3.0938 0.00 0.15 0.00 -0.31
12 3.0938 0.00 0.06 0.00 -0.23
13 3.0938 0.00 0.06 0.00 -0.27
14 4.2300 0.00 -0.28 0.00 -0.09
15 4.2302 0.00 -0.27 0.00 -0.76
16 4.2327 0.00 -0.30 0.00 0.05
17 6.7210 0.00 0.02 0.00 -0.15
18 6.7210 0.00 -0.56 0.00 -0.17
19 6.7210 0.00 -0.43 0.00 -0.18
20 6.7211 0.00 -0.33 0.00 -0.19
21 11.0967 0.00 0.08 0.00 0.15
22 11.0993 0.00 0.19 0.00 0.18
23 11.0997 0.00 0.20 0.00 0.32
24 13.1854 0.00 0.14 0.00 0.16
25 13.1856 0.00 0.46 0.00 0.22
26 13.1858 0.00 0.11 0.00 0.01
27 20.1668 0.00 -0.20 0.00 -0.18
28 20.1669 0.00 -0.03 0.00 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.
02CU154 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.773 43.773 43.773 ecceobj 0.059 0.059 0.059 incobj 3.351 3.351 3.351 qmin 40.141 40.141 40.143 qmax 47.736 47.741 47.731 amean 43.827 43.827 43.827 amin 43.484 43.483 43.485 amax 44.187 44.190 44.185 emean 0.063 0.063 0.063 emin 0.046 0.046 0.046 emax 0.081 0.081 0.081 imean 1.905 1.905 1.905 imin 1.140 1.140 1.140 imax 2.592 2.592 2.592 excite_mean 0.072 0.072 0.072 fracstop 1.000 1.000 1.000 cjmean 3.093 3.093 3.093 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 182.3 182.2 182.3 kozaiamp 179.9 180.0 180.0