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: 99CZ118
# Created Wed Dec 25 02:07:54 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 29 observations of 29
# Arc: 17.09y
# First observation: 1999/02/10
# Last observation: 2016/03/13
# Chi-squared of fit: 101.65 DOF: 52 RMS: 0.33
# Min/Max residuals: -0.77 0.68
# Exact a, adot, b, bdot, g, gdot:
1.702937E-05 2.134218E-02 -9.923415E-06 -1.118721E-02 2.216416E-02 -9.845391E-03
# Covariance matrix:
9.7419E-14 -1.4419E-14 -6.2930E-15 4.6019E-15 1.9170E-14 -2.1319E-14
-1.4419E-14 1.5459E-14 8.8717E-15 -6.7749E-15 3.4451E-14 3.1179E-14
-6.2930E-15 8.8717E-15 8.5802E-14 -1.1423E-14 1.7513E-14 2.0371E-14
4.6019E-15 -6.7749E-15 -1.1423E-14 4.8616E-15 -1.3939E-14 -1.5484E-14
1.9170E-14 3.4451E-14 1.7513E-14 -1.3939E-14 1.8909E-13 6.3761E-14
-2.1319E-14 3.1179E-14 2.0371E-14 -1.5484E-14 6.3761E-14 7.1310E-14
# lat0 lon0 xBary yBary zBary JD0
0.288632 165.138911 0.397521 0.004361 -0.910232 2451219.933933
# Heliocentric elements and errors
Epoch: 2451220.5000 = 1999/02/11
Mean Anomaly: 350.46116 +/- 0.004
Argument of Peri: 236.86434 +/- 0.003
Long of Asc Node: 345.17710 +/- 0.000
Inclination: 27.83395 +/- 0.000
Eccentricity: 0.67421671 +/- 0.0001
Semi-Major Axis: 114.96879779 +/- 0.0283
Time of Perihelion: 2463151.0746 +/- 162.0
Perihelion: 37.45491269 +/- 0.0123
Aphelion: 192.48268290 +/- 0.0481
Period (y) 1232.7590 +/- 0.46
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.37791758 +/- 0.0009
Ecliptic Y 12.18853680 +/- 0.0002
Ecliptic Z 0.22683854 +/- 0.0000
Ecliptic XDOT 0.00049091 +/- 0.0000
Ecliptic YDOT -0.00284925 +/- 0.0000
Ecliptic ZDOT -0.00138802 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.02217929 +/- 0.0008
Geocenter to KBO 45.11824006 +/- 0.0009
# Hcoef: 7.87
The following table shows the complete astrometric record for 99CZ118. 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 (99CZ118) followed by the observatory code and reference code for the source of the astrometry.
1999 02 10.43319 11 05 43.05 +06 07 18.2 24.3R 99CZ118 568 Ca4013 1999 02 10.47428 11 05 42.89 +06 07 18.7 24.3R 99CZ118 568 Ca4013 1999 02 12.58336 11 05 34.59 +06 07 56.6 24.3R 99CZ118 568 Ca4013 1999 02 12.63119 11 05 34.38 +06 07 57.5 24.3R 99CZ118 568 Ca4013 1999 05 07.27921 11 00 31.64 +06 29 43.6 24.1R 99CZ118 568 Ca4843 1999 05 07.35417 11 00 31.51 +06 29 43.9 24.1R 99CZ118 568 Ca4843 2000 01 01.53995 11 11 08.16 +04 56 00.4 99CZ118 568 Ca8502 2000 01 01.57371 11 11 08.10 +04 56 00.4 23.6R 99CZ118 568 Ca8502 2000 01 01.61562 11 11 08.03 +04 56 00.4 99CZ118 568 Ca8502 2000 01 02.50997 11 11 06.73 +04 56 02.2 99CZ118 568 Ca8502 2000 01 02.55162 11 11 06.69 +04 56 02.1 99CZ118 568 Ca8502 2000 01 02.59326 11 11 06.60 +04 56 02.2 99CZ118 568 Ca8502 2000 03 29.29684 11 05 55.78 +05 18 16.9 99CZ118 568 Cb1942 2000 03 29.30500 11 05 55.73 +05 18 17.1 99CZ118 568 Cb1942 2000 03 29.31182 11 05 55.67 +05 18 17.4 99CZ118 568 Cb1942 2000 03 29.33800 11 05 55.60 +05 18 18.1 99CZ118 568 Cb1942 2000 03 29.34551 11 05 55.57 +05 18 18.6 99CZ118 568 Cb1943 2000 03 29.35359 11 05 55.55 +05 18 18.7 99CZ118 568 Cb1943 2001 02 23.25063 11 11 59.16 +04 01 05.7 24.1R 99CZ118 309 Cc6423 2001 02 24.18469 11 11 55.16 +04 01 24.3 99CZ118 309 Cc6423 2001 02 24.31901 11 11 54.58 +04 01 26.6 24.0R 99CZ118 309 Cc6423 2008 05 03.26114 11 34 36.14 -03 54 58.7 99CZ118 695 Cz0373 2008 05 03.26645 11 34 36.09 -03 54 59.0 99CZ118 695 Cz0373 2008 05 04.28675 11 34 33.38 -03 54 41.4 99CZ118 695 Cz0373 2008 05 05.16253 11 34 31.07 -03 54 27.4 99CZ118 695 Cz0373 2008 05 05.16913 11 34 31.03 -03 54 27.3 99CZ118 695 Cz0373 2008 05 05.21993 11 34 30.91 -03 54 26.4 99CZ118 695 Cz0373 2016 03 13.25037 12 14 37.36 -14 58 33.9 23.8R 99CZ118 G37 C~1pPV 2016 03 13.29876 12 14 37.12 -14 58 33.3 99CZ118 G37 C~1pPV
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 -0.19 0.00 0.51
2 0.0001 0.00 -0.14 0.00 0.28
3 0.0059 0.00 0.15 0.00 0.31
4 0.0060 0.00 -0.10 0.00 0.35
5 0.2350 0.00 -0.77 0.00 0.13
6 0.2352 0.00 -0.71 0.00 0.16
7 0.8901 0.00 0.23 0.00 -0.18
8 0.8902 0.00 0.07 0.00 -0.23
9 0.8903 0.00 -0.05 0.00 -0.30
10 0.8927 0.00 -0.39 0.00 -0.07
11 0.8929 0.00 -0.03 0.00 -0.26
12 0.8930 0.00 -0.41 0.00 -0.24
13 1.1304 0.00 0.68 0.00 -0.69
14 1.1304 0.00 0.42 0.00 -0.64
15 1.1304 0.00 -0.06 0.00 -0.46
16 1.1305 0.00 0.47 0.00 -0.23
17 1.1305 0.00 0.47 0.00 0.13
18 1.1305 0.00 0.66 0.00 0.09
19 2.0365 0.00 0.03 0.00 0.25
20 2.0390 0.00 -0.06 0.00 0.59
21 2.0394 0.00 0.04 0.00 0.26
22 9.2261 0.00 0.21 0.00 0.08
23 9.2261 0.00 -0.32 0.00 -0.31
24 9.2289 0.00 0.29 0.00 0.32
25 9.2313 0.00 0.02 0.00 0.04
26 9.2313 0.00 -0.32 0.00 0.03
27 9.2314 0.00 -0.08 0.00 0.11
28 17.0864 0.00 -0.00 0.00 0.05
29 17.0866 0.00 -0.01 0.00 -0.14
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.
99CZ118 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 115.200 115.198 115.202 ecceobj 0.674 0.674 0.674 incobj 27.810 27.810 27.810 qmin 36.254 36.278 36.349 qmax 204.690 204.449 204.866 amean 116.969 117.007 117.042 amin 114.587 114.462 114.483 amax 121.078 120.946 121.158 emean 0.678 0.679 0.679 emin 0.666 0.668 0.670 emax 0.691 0.691 0.691 imean 28.702 28.559 28.617 imin 28.260 28.242 28.359 imax 29.498 29.213 29.000 excite_mean 0.831 0.831 0.831 fracstop 1.000 1.000 1.000 cjmean 2.797 2.798 2.796 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 281.8 277.4 269.9 kozaiamp 44.7 42.4 35.1