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: 04FW164 # Created Sun Dec 22 02:08:37 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 31 observations of 34 # Arc: 14.89y # First observation: 2003/04/26 # Last observation: 2018/03/17 # Chi-squared of fit: 407.63 DOF: 56 RMS: 0.64 # Min/Max residuals: -1.73 0.98 # Exact a, adot, b, bdot, g, gdot: -1.510926E-06 3.573772E-02 -1.081865E-05 5.735205E-03 3.090280E-02 -7.033612E-04 # Covariance matrix: 1.8900E-13 -5.7724E-14 1.3082E-14 -7.4665E-15 5.9385E-14 -7.4015E-14 -5.7724E-14 2.9144E-14 -7.4414E-15 4.2579E-15 -2.7722E-14 4.2210E-14 1.3082E-14 -7.4414E-15 1.0328E-13 -9.5553E-15 6.2788E-15 -1.1313E-14 -7.4665E-15 4.2579E-15 -9.5553E-15 1.8868E-15 -3.2736E-15 6.4900E-15 5.9385E-14 -2.7722E-14 6.2788E-15 -3.2736E-15 2.0667E-13 -3.2369E-14 -7.4015E-14 4.2210E-14 -1.1313E-14 6.4900E-15 -3.2369E-14 6.4343E-14 # lat0 lon0 xBary yBary zBary JD0 -0.266670 -164.236899 -0.346772 -0.004402 -0.945422 2452755.824823 # Heliocentric elements and errors Epoch: 2452756.5000 = 2003/04/27 Mean Anomaly: 357.92909 +/- 0.002 Argument of Peri: 1.26273 +/- 0.003 Long of Asc Node: 197.96957 +/- 0.000 Inclination: 9.11767 +/- 0.000 Eccentricity: 0.16014838 +/- 0.0001 Semi-Major Axis: 39.65188343 +/- 0.0032 Time of Perihelion: 2453281.1303 +/- 10.9 Perihelion: 33.30169848 +/- 0.0035 Aphelion: 46.00206839 +/- 0.0043 Period (y) 249.6916 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.96006013 +/- 0.0005 Ecliptic Y -9.37696679 +/- 0.0001 Ecliptic Z -0.15094016 +/- 0.0000 Ecliptic XDOT 0.00091166 +/- 0.0000 Ecliptic YDOT -0.00303577 +/- 0.0000 Ecliptic ZDOT 0.00050859 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 33.30759690 +/- 0.0004 Geocenter to KBO 32.35957714 +/- 0.0005 # Hcoef: 8.05
The following table shows the complete astrometric record for 04FW164. 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 (04FW164) followed by the observatory code and reference code for the source of the astrometry.
2003 04 26.32408 12 57 39.91 -06 26 58.6 22.7R 04FW164 568 Cq9909 2003 04 26.36628 12 57 39.69 -06 26 57.1 22.6R 04FW164 568 Cq9909 2003 04 26.40867 12 57 39.46 -06 26 55.6 22.5R 04FW164 568 Cq9909 2004 03 20.57450 13 09 00.65 -07 17 45.3 04FW164 568 Cq9909 2004 03 29.52259 13 08 13.60 -07 12 26.1 23.3R 04FW164 568 Cq9909 2004 03 29.54560 13 08 13.43 -07 12 25.2 23.2R 04FW164 568 Cq9909 2004 03 29.57409 13 08 13.29 -07 12 24.2 23.6R 04FW164 568 Cq9909 2004 04 15.29003 13 06 42.28 -07 02 08.3 04FW164 675 Cq9909 2004 04 15.33913 13 06 42.00 -07 02 06.2 04FW164 675 Cq9909 2004 04 15.38135 13 06 41.76 -07 02 05.0 04FW164 675 Cq9909 2004 04 16.24938 13 06 37.08 -07 01 32.4 04FW164 675 Cq9909 2004 05 24.19250 13 03 43.16 -06 41 31.6 04FW164 695 Cq9909 2004 05 24.24012 13 03 43.01 -06 41 30.8 04FW164 695 Cq9909 2004 05 24.29308 13 03 42.83 -06 41 29.3 04FW164 695 Cq9909 2005 07 08.28030 13 10 46.54 -07 01 35.5 22.9r 04FW164 568 Cq9909 2005 08 01.97568 13 11 43.10 -07 06 17.5 04FW164 309 Cq9909 2005 08 01.97898 13 11 43.12 -07 06 17.8 04FW164 309 Cq9909 2005 08 01.98307 13 11 43.12 -07 06 17.8 04FW164 309 Cq9909 2005 08 02.97488 13 11 46.72 -07 06 37.3 04FW164 309 Cq9909 2005 08 02.97822 13 11 46.72 -07 06 37.8 04FW164 309 Cq9909 2005 08 02.98225 13 11 46.73 -07 06 37.4 04FW164 309 Cq9909 2013 03 13.40915 14 23 11.76 -11 09 39.9 23.2R 04FW164 G37 C~0qSW 2013 03 13.46460 14 23 11.57 -11 09 38.6 04FW164 G37 C~0qSW 2013 03 22.34052 14 22 37.08 -11 05 43.0 22.9R 04FW164 G37 C~0qSW 2013 03 22.48717 14 22 36.47 -11 05 39.2 04FW164 G37 C~0qSW 2013 03 24.31887 14 22 28.59 -11 04 46.7 22.8R 04FW164 G37 C~0qSW 2013 03 24.39542 14 22 28.23 -11 04 45.0 04FW164 G37 C~0qSW 2013 03 24.44799 14 22 27.99 -11 04 43.3 04FW164 G37 C~0qSW 2018 03 17.50007 15 03 44.88 -12 45 15.7 23.6r 04FW164 568 2018 03 17.56797 15 03 44.67 -12 45 14.3 23.7r 04FW164 568 2018 03 17.63469 15 03 44.47 -12 45 12.9 23.0r 04FW164 568 2019 05 06.310780 15 08 03.39 -12 40 25.9 23.1G 04FW164 705 C~39ne 2019 05 06.344340 15 08 03.20 -12 40 24.9 22.8G 04FW164 705 C~39ne 2019 05 06.379460 15 08 02.99 -12 40 24.0 23.0G 04FW164 705 C~39ne
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 ( 4.89) 0.00 ( 1.04)
2 0.0001 0.00 ( 4.85) 0.00 ( 1.07)
3 0.0002 0.00 ( 4.67) 0.00 ( 1.08)
4 0.9014 0.00 -1.73 0.00 0.26
5 0.9259 0.00 -0.90 0.00 -0.15
6 0.9260 0.00 -1.56 0.00 -0.09
7 0.9261 0.00 -1.32 0.00 -0.13
8 0.9718 0.00 -1.18 0.00 -0.65
9 0.9720 0.00 -1.32 0.00 -0.35
10 0.9721 0.00 -1.44 0.00 -0.70
11 0.9745 0.00 -1.44 0.00 0.07
12 1.0784 0.00 -0.77 0.00 0.28
13 1.0785 0.00 -0.56 0.00 -0.06
14 1.0786 0.00 -0.54 0.00 0.16
15 2.2011 0.00 -0.43 0.00 -0.27
16 2.2687 0.00 -0.74 0.00 0.01
17 2.2687 0.00 -0.61 0.00 -0.23
18 2.2687 0.00 -0.83 0.00 -0.15
19 2.2715 0.00 -0.77 0.00 -0.28
20 2.2715 0.00 -0.95 0.00 -0.71
21 2.2715 0.00 -1.02 0.00 -0.23
22 9.8811 0.00 0.72 0.00 -0.12
23 9.8813 0.00 0.87 0.00 -0.21
24 9.9056 0.00 0.59 0.00 -0.10
25 9.9060 0.00 0.96 0.00 -0.41
26 9.9110 0.00 0.98 0.00 0.28
27 9.9112 0.00 0.71 0.00 -0.20
28 9.9114 0.00 0.64 0.00 -0.00
29 14.8917 0.00 -0.56 0.00 0.41
30 14.8918 0.00 -0.60 0.00 0.33
31 14.8920 0.00 -0.53 0.00 0.25
32 16.0273 0.00 -0.70 0.00 0.24
33 16.0274 0.00 -0.64 0.00 0.33
34 16.0275 0.00 -0.75 0.00 0.28
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.
04FW164 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.254 39.254 39.254 ecceobj 0.152 0.152 0.152 incobj 9.148 9.148 9.148 qmin 32.620 32.618 32.622 qmax 46.829 46.829 46.829 amean 39.457 39.457 39.457 amin 39.053 39.054 39.052 amax 39.925 39.922 39.926 emean 0.153 0.153 0.153 emin 0.131 0.131 0.131 emax 0.174 0.174 0.174 imean 10.016 10.016 10.016 imin 9.267 9.267 9.267 imax 10.787 10.788 10.787 excite_mean 0.232 0.232 0.232 fracstop 1.000 1.000 1.000 cjmean 2.991 2.991 2.991 libcent 0 180.8 180.8 180.7 libamp 0 75.3 75.3 75.3 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 185.4 185.5 185.3 kozaiamp 180.0 180.0 180.0