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: 99OD4
# Created Sun Dec 22 02:08:04 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 44 observations of 44
# Arc: 22.15y
# First observation: 1999/07/19
# Last observation: 2021/09/12
# Chi-squared of fit: 83.78 DOF: 82 RMS: 0.24
# Min/Max residuals: -0.46 0.75
# Exact a, adot, b, bdot, g, gdot:
9.794361E-06 2.019821E-02 1.403487E-06 5.178206E-03 2.301000E-02 -1.162042E-03
# Covariance matrix:
7.1513E-14 -1.3070E-14 2.9703E-15 -3.1029E-15 5.3466E-14 -2.7157E-14
-1.3070E-14 1.5710E-14 -3.6141E-15 3.9534E-15 1.2772E-14 3.3416E-14
2.9703E-15 -3.6141E-15 4.6816E-14 -3.7444E-15 -1.3723E-15 -8.1307E-15
-3.1029E-15 3.9534E-15 -3.7444E-15 1.6830E-15 1.9912E-15 8.8597E-15
5.3466E-14 1.2772E-14 -1.3723E-15 1.9912E-15 2.1913E-13 1.3718E-14
-2.7157E-14 3.3416E-14 -8.1307E-15 8.8597E-15 1.3718E-14 7.5105E-14
# lat0 lon0 xBary yBary zBary JD0
0.687526 -55.688409 0.148455 0.011796 -1.003144 2451378.919813
# Heliocentric elements and errors
Epoch: 2451378.5000 = 1999/07/19
Mean Anomaly: 225.03047 +/- 0.030
Argument of Peri: 144.68188 +/- 0.022
Long of Asc Node: 301.50995 +/- 0.000
Inclination: 14.39070 +/- 0.000
Eccentricity: 0.09387095 +/- 0.0000
Semi-Major Axis: 41.54387810 +/- 0.0029
Time of Perihelion: 2488046.9206 +/- 10.5
Perihelion: 37.64411484 +/- 0.0032
Aphelion: 45.44364135 +/- 0.0037
Period (y) 267.7742 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 24.94709797 +/- 0.0005
Ecliptic Y -36.80479099 +/- 0.0007
Ecliptic Z 0.52156641 +/- 0.0000
Ecliptic XDOT 0.00189955 +/- 0.0000
Ecliptic YDOT 0.00148353 +/- 0.0000
Ecliptic ZDOT 0.00061447 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.46600745 +/- 0.0007
Geocenter to KBO 43.45943221 +/- 0.0009
# Hcoef: 7.21
The following table shows the complete astrometric record for 99OD4. 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 (99OD4) followed by the observatory code and reference code for the source of the astrometry.
1999 07 19.41907 20 25 53.00 -18 30 47.9 23.4R 99OD4 568 Ca6755 1999 07 19.44678 20 25 52.85 -18 30 48.3 99OD4 568 Ca6755 1999 07 19.47521 20 25 52.71 -18 30 48.9 99OD4 568 Ca6755 1999 08 06.16666 20 24 28.84 -18 34 45.3 99OD4 807 Ca6755 1999 08 06.17234 20 24 28.81 -18 34 44.7 99OD4 807 Ca6755 1999 08 06.17802 20 24 28.79 -18 34 45.1 99OD4 807 Ca6755 1999 08 06.26267 20 24 28.37 -18 34 46.5 99OD4 807 Ca6755 1999 08 06.26823 20 24 28.33 -18 34 46.8 99OD4 807 Ca6755 1999 08 06.27391 20 24 28.32 -18 34 46.5 99OD4 807 Ca6755 1999 08 07.16469 20 24 24.16 -18 34 58.6 99OD4 807 Ca6755 1999 08 07.23817 20 24 23.83 -18 34 59.2 99OD4 807 Ca6755 1999 08 07.24393 20 24 23.78 -18 34 59.7 99OD4 807 Ca6755 1999 08 07.24962 20 24 23.74 -18 34 59.4 99OD4 807 Ca6755 2000 06 07.52960 20 33 01.44 -17 49 38.0 99OD4 568 Cb5150 2000 06 07.56054 20 33 01.36 -17 49 38.3 99OD4 568 Cb5150 2000 06 08.56817 20 32 58.47 -17 49 44.7 99OD4 568 Cb5150 2000 07 24.08177 20 29 53.79 -17 58 04.8 99OD4 809 Cb7609 2000 07 24.09600 20 29 53.72 -17 58 05.1 23.5R 99OD4 809 Cb7609 2000 07 24.11602 20 29 53.62 -17 58 05.3 23.5R 99OD4 809 Cb7609 2000 08 02.10854 20 29 10.95 -18 00 09.6 99OD4 809 Cb7609 2000 08 02.15962 20 29 10.68 -18 00 10.6 99OD4 809 Cb7609 2000 08 05.32778 20 28 55.78 -18 00 54.2 23.6R 99OD4 568 Cb7609 2000 08 05.37175 20 28 55.57 -18 00 55.0 99OD4 568 Cb7609 2000 08 05.41993 20 28 55.32 -18 00 55.6 23.6R 99OD4 568 Cb7609 2000 08 06.31837 20 28 51.15 -18 01 08.0 23.1R 99OD4 568 Cb7609 2000 08 06.36419 20 28 50.93 -18 01 08.5 23.2R 99OD4 568 Cb7609 2000 08 06.40555 20 28 50.73 -18 01 09.2 99OD4 568 Cb7609 2000 09 23.24918 20 25 52.66 -18 09 46.6 23.5R 99OD4 568 Cc0831 2000 09 23.29902 20 25 52.54 -18 09 47.0 23.8R 99OD4 568 Cc0831 2000 09 23.34696 20 25 52.43 -18 09 47.4 24.0R 99OD4 568 Cc0831 2000 09 24.25098 20 25 50.44 -18 09 52.8 23.7R 99OD4 568 Cc0831 2000 09 24.30045 20 25 50.32 -18 09 53.3 23.8R 99OD4 568 Cc0831 2000 09 24.35897 20 25 50.18 -18 09 53.5 23.7R 99OD4 568 Cc0831 2001 07 25.37212 20 34 13.78 -17 23 57.8 22.5R 99OD4 568 Cd2765 2001 07 25.42968 20 34 13.50 -17 23 58.6 22.7R 99OD4 568 Cd2765 2001 07 25.49457 20 34 13.18 -17 23 59.6 22.6R 99OD4 568 Cd2765 2001 07 26.43385 20 34 08.74 -17 24 13.1 99OD4 568 Cd3195 2013 10 07.13223 21 21 27.78 -10 21 16.0 22.3R 99OD4 695 C~0zdB 2013 10 07.20671 21 21 27.58 -10 21 16.8 99OD4 695 C~0zdB 2016 08 03.191389 21 38 29.82 -08 02 09.5 99OD4 W84 C~3i90 2016 08 03.192350 21 38 29.82 -08 02 09.4 99OD4 W84 C~3i90 2021 09 12.134850 21 57 06.346 -04 51 17.52 23.4G 99OD4 G37 C~552V 2021 09 12.193730 21 57 06.106 -04 51 18.96 99OD4 G37 C~552V 2021 09 12.251010 21 57 05.855 -04 51 20.23 99OD4 G37 C~552V
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 0.75 0.00 0.63
2 0.0001 0.00 0.49 0.00 0.60
3 0.0002 0.00 0.44 0.00 0.37
4 0.0486 0.00 0.14 0.00 -0.17
5 0.0486 0.00 0.09 0.00 0.50
6 0.0486 0.00 0.20 0.00 0.18
7 0.0489 0.00 -0.06 0.00 -0.11
8 0.0489 0.00 -0.26 0.00 -0.34
9 0.0489 0.00 -0.01 0.00 0.03
10 0.0513 0.00 0.00 0.00 -0.28
11 0.0515 0.00 0.29 0.00 0.08
12 0.0515 0.00 -0.05 0.00 -0.34
13 0.0516 0.00 -0.25 0.00 0.03
14 0.8874 0.00 -0.19 0.00 0.47
15 0.8875 0.00 -0.04 0.00 0.36
16 0.8902 0.00 -0.14 0.00 0.37
17 1.0148 0.00 0.04 0.00 -0.21
18 1.0149 0.00 0.01 0.00 -0.31
19 1.0149 0.00 -0.04 0.00 -0.23
20 1.0395 0.00 -0.09 0.00 0.01
21 1.0397 0.00 -0.46 0.00 -0.27
22 1.0483 0.00 -0.12 0.00 0.12
23 1.0485 0.00 -0.13 0.00 -0.07
24 1.0486 0.00 -0.43 0.00 -0.00
25 1.0511 0.00 0.02 0.00 -0.04
26 1.0512 0.00 -0.01 0.00 0.10
27 1.0513 0.00 -0.06 0.00 -0.03
28 1.1823 0.00 0.15 0.00 0.08
29 1.1824 0.00 0.10 0.00 -0.02
30 1.1826 0.00 0.12 0.00 -0.13
31 1.1850 0.00 0.09 0.00 -0.17
32 1.1852 0.00 -0.04 0.00 -0.39
33 1.1853 0.00 -0.17 0.00 -0.26
34 2.0177 0.00 -0.02 0.00 -0.13
35 2.0178 0.00 -0.07 0.00 -0.11
36 2.0180 0.00 -0.19 0.00 -0.19
37 2.0206 0.00 -0.27 0.00 -0.36
38 14.2196 0.00 0.32 0.00 -0.09
39 14.2198 0.00 -0.13 0.00 0.12
40 17.0425 0.00 0.14 0.00 0.18
41 17.0425 0.00 0.21 0.00 0.30
42 22.1512 0.00 -0.13 0.00 -0.10
43 22.1513 0.00 -0.01 0.00 -0.14
44 22.1515 0.00 -0.16 0.00 -0.05
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.
99OD4 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.482 41.482 41.482 ecceobj 0.095 0.095 0.095 incobj 14.405 14.405 14.405 qmin 36.544 36.534 36.560 qmax 46.656 46.638 46.689 amean 41.475 41.475 41.475 amin 41.143 41.141 41.145 amax 41.833 41.833 41.833 emean 0.099 0.099 0.099 emin 0.083 0.084 0.083 emax 0.116 0.116 0.117 imean 15.770 15.770 15.770 imin 14.897 14.903 14.896 imax 16.639 16.638 16.641 excite_mean 0.289 0.289 0.289 fracstop 1.000 1.000 1.000 cjmean 2.974 2.974 2.974 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 180.4 180.4 180.5 kozaiamp 180.0 180.0 180.0