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: 99CZ131 # Created Tue Apr 1 01:07:57 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 20 observations of 20 # Arc: 20.07y # First observation: 1999/02/11 # Last observation: 2019/03/08 # Chi-squared of fit: 12.69 DOF: 34 RMS: 0.14 # Min/Max residuals: -0.34 0.33 # Exact a, adot, b, bdot, g, gdot: 1.694973E-05 2.275367E-02 4.866835E-07 9.619783E-04 2.374859E-02 1.009255E-03 # Covariance matrix: 3.6892E-13 -2.4150E-14 5.7017E-17 -2.6865E-16 3.8675E-14 -1.4158E-14 -2.4150E-14 1.1897E-13 -9.7451E-16 4.8825E-15 2.1863E-13 2.5030E-13 5.7017E-17 -9.7451E-16 3.6396E-13 -1.9099E-14 -1.6584E-15 -2.0819E-15 -2.6865E-16 4.8825E-15 -1.9099E-14 1.4210E-15 8.4813E-15 1.0419E-14 3.8675E-14 2.1863E-13 -1.6584E-15 8.4813E-15 8.9411E-13 4.3088E-13 -1.4158E-14 2.5030E-13 -2.0819E-15 1.0419E-14 4.3088E-13 5.3438E-13 # lat0 lon0 xBary yBary zBary JD0 -0.005164 151.897737 0.161737 -0.000312 -0.980268 2451220.910353 # Heliocentric elements and errors Epoch: 2451220.5000 = 1999/02/11 Mean Anomaly: 87.17156 +/- 0.116 Argument of Peri: 267.80801 +/- 0.134 Long of Asc Node: 151.79670 +/- 0.001 Inclination: 2.42712 +/- 0.000 Eccentricity: 0.04275622 +/- 0.0000 Semi-Major Axis: 43.09319784 +/- 0.0059 Time of Perihelion: 2426200.6991 +/- 33.8 Perihelion: 41.25069561 +/- 0.0058 Aphelion: 44.93570006 +/- 0.0063 Period (y) 282.8924 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -37.92416338 +/- 0.0015 Ecliptic Y 20.43858949 +/- 0.0008 Ecliptic Z -0.00377364 +/- 0.0000 Ecliptic XDOT -0.00133996 +/- 0.0000 Ecliptic YDOT -0.00225008 +/- 0.0000 Ecliptic ZDOT 0.00011089 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.08103737 +/- 0.0014 Geocenter to KBO 42.10776266 +/- 0.0017 # Hcoef: 7.84
The following table shows the complete astrometric record for 99CZ131. 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 (99CZ131) followed by the observatory code and reference code for the source of the astrometry.
1999 02 11.40961 10 15 35.09 +10 47 40.6 24.0R 99CZ131 568 Ca4191 1999 02 11.48720 10 15 34.76 +10 47 42.4 24.0R 99CZ131 568 Ca4191 1999 02 19.54360 10 14 58.11 +10 51 13.5 24.0R 99CZ131 568 Ca4191 1999 02 19.56681 10 14 57.98 +10 51 14.0 24.0R 99CZ131 568 Ca4191 2016 03 17.425731 11 35 54.19 +03 35 14.2 99CZ131 T09 C~8SDV 2016 03 17.568282 11 35 53.59 +03 35 18.3 99CZ131 T09 C~8SDV 2017 03 24.208417 11 40 10.584 +03 10 55.52 24.1V 99CZ131 W84 C~8SDW 2018 03 10.439321 11 45 54.65 +02 36 52.8 99CZ131 T09 C~8SDW 2018 03 10.498974 11 45 54.39 +02 36 54.4 99CZ131 T09 C~8SDW 2018 03 18.44252 11 45 20.10 +02 40 41.4 23.8i 99CZ131 T09 C~8SDW 2018 03 18.46308 11 45 20.01 +02 40 42.0 24.0i 99CZ131 T09 C~8SDW 2018 03 18.49223 11 45 19.87 +02 40 42.9 23.8i 99CZ131 T09 C~8SDW 2018 04 24.38531 11 42 54.96 +02 56 21.7 24.0z 99CZ131 T09 C~8SDW 2018 04 24.40148 11 42 54.93 +02 56 21.9 23.4z 99CZ131 T09 C~8SDW 2018 04 24.43185 11 42 54.83 +02 56 22.7 23.5z 99CZ131 T09 C~8SDW 2018 04 24.48803 11 42 54.63 +02 56 23.7 23.5z 99CZ131 T09 C~8SDW 2019 02 05.498105 11 52 42.40 +01 55 16.0 99CZ131 T09 C~8SDW 2019 03 08.36022 11 50 47.05 +02 08 23.2 24.5r 99CZ131 T09 C~8SDW 2019 03 08.39383 11 50 46.92 +02 08 24.4 24.5r 99CZ131 T09 C~8SDW 2019 03 08.42333 11 50 46.78 +02 08 25.0 24.8r 99CZ131 T09 C~8SDW
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 -0.34 0.00 0.16
2 0.0002 0.00 0.04 0.00 -0.05
3 0.0223 0.00 0.33 0.00 -0.02
4 0.0223 0.00 -0.01 0.00 -0.13
5 17.0952 0.00 -0.19 0.00 0.10
6 17.0956 0.00 0.22 0.00 0.16
7 18.1131 0.00 -0.18 0.00 0.06
8 19.0747 0.00 0.08 0.00 0.05
9 19.0749 0.00 0.09 0.00 -0.05
10 19.0966 0.00 0.15 0.00 -0.13
11 19.0967 0.00 0.16 0.00 -0.11
12 19.0967 0.00 -0.02 0.00 -0.04
13 19.1977 0.00 -0.21 0.00 0.02
14 19.1978 0.00 0.13 0.00 -0.11
15 19.1979 0.00 0.12 0.00 0.08
16 19.1980 0.00 -0.13 0.00 -0.06
17 19.9838 0.00 0.11 0.00 -0.02
18 20.0683 0.00 -0.21 0.00 -0.05
19 20.0684 0.00 0.01 0.00 0.19
20 20.0685 0.00 -0.18 0.00 -0.04
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.
99CZ131 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.200 43.200 43.200 ecceobj 0.044 0.044 0.044 incobj 2.426 2.426 2.426 qmin 40.190 40.181 40.202 qmax 46.671 46.661 46.684 amean 43.338 43.339 43.339 amin 43.001 43.000 43.005 amax 43.696 43.694 43.696 emean 0.052 0.052 0.052 emin 0.033 0.033 0.033 emax 0.069 0.069 0.069 imean 2.628 2.628 2.628 imin 1.675 1.675 1.675 imax 3.363 3.362 3.363 excite_mean 0.070 0.070 0.070 fracstop 1.000 1.000 1.000 cjmean 3.088 3.088 3.088 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 183.3 183.4 183.6 kozaiamp 180.0 179.9 180.0