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: 99CT153 # Created Tue Apr 1 01:07:58 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 27 observations of 29 # Arc: 17.95y # First observation: 1999/02/11 # Last observation: 2017/01/23 # Chi-squared of fit: 13.80 DOF: 48 RMS: 0.13 # Min/Max residuals: -0.32 0.26 # Exact a, adot, b, bdot, g, gdot: 1.487001E-05 2.542492E-02 9.893936E-07 2.020711E-03 2.496176E-02 1.404661E-03 # Covariance matrix: 3.0801E-13 -7.0964E-14 3.7306E-15 -4.4761E-15 -3.7630E-14 -1.1730E-13 -7.0964E-14 1.7456E-13 -1.1614E-14 1.3946E-14 2.3909E-13 3.6316E-13 3.7306E-15 -1.1614E-14 2.7479E-13 -1.6843E-14 -1.5905E-14 -2.4320E-14 -4.4761E-15 1.3946E-14 -1.6843E-14 2.2184E-15 1.9106E-14 2.9202E-14 -3.7630E-14 2.3909E-13 -1.5905E-14 1.9106E-14 4.1807E-13 4.9583E-13 -1.1730E-13 3.6316E-13 -2.4320E-14 2.9202E-14 4.9583E-13 7.6054E-13 # lat0 lon0 xBary yBary zBary JD0 -0.188323 161.252115 0.317038 -0.003328 -0.941601 2451221.023253 # Heliocentric elements and errors Epoch: 2451220.5000 = 1999/02/11 Mean Anomaly: 28.13203 +/- 0.007 Argument of Peri: 323.82815 +/- 0.009 Long of Asc Node: 163.11435 +/- 0.000 Inclination: 4.55766 +/- 0.000 Eccentricity: 0.09502526 +/- 0.0001 Semi-Major Axis: 44.63447122 +/- 0.0056 Time of Perihelion: 2442709.0695 +/- 2.6 Perihelion: 40.39306889 +/- 0.0060 Aphelion: 48.87587355 +/- 0.0069 Period (y) 298.2042 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -38.71715983 +/- 0.0011 Ecliptic Y 13.47817600 +/- 0.0004 Ecliptic Z -0.13162425 +/- 0.0000 Ecliptic XDOT -0.00104456 +/- 0.0000 Ecliptic YDOT -0.00258193 +/- 0.0000 Ecliptic ZDOT 0.00022113 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.99627336 +/- 0.0010 Geocenter to KBO 40.06128340 +/- 0.0012 # Hcoef: 8.18
The following table shows the complete astrometric record for 99CT153. 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 (99CT153) followed by the observatory code and reference code for the source of the astrometry.
1999 02 11.52251 10 50 31.45 +07 10 15.6 23.9R 99CT153 568 Ca4208 1999 02 11.60642 10 50 31.06 +07 10 18.0 23.9R 99CT153 568 Ca4208 1999 03 15.51731 10 48 05.41 +07 25 44.3 23.9R 99CT153 568 Ca4208 1999 03 15.57045 10 48 05.15 +07 25 45.8 23.9R 99CT153 568 Ca4208 2002 03 20.22230 11 03 48.298 +06 10 39.59 22.4R 99CT153 695 2002 03 20.34667 11 03 47.694 +06 10 43.49 99CT153 695 2016 04 02.43374 12 18 59.80 -00 11 36.3 23.9i 99CT153 T09 C~8COV 2016 04 02.44189 12 18 59.76 -00 11 35.9 24.0i 99CT153 T09 C~8COV 2016 04 02.46633 12 18 59.66 -00 11 35.3 24.2i 99CT153 T09 C~8COV 2016 04 02.49093 12 18 59.54 -00 11 34.8 23.7i 99CT153 T09 C~8COV 2016 04 02.51252 12 18 59.45 -00 11 33.9 23.9i 99CT153 T09 C~8COV 2016 04 02.52328 12 18 59.40 -00 11 33.8 24.3i 99CT153 T09 C~8COV 2016 04 04.34598 12 18 51.43 -00 10 40.8 25.4g 99CT153 T09 C~8COV 2016 04 04.36164 12 18 51.36 -00 10 40.3 25.4g 99CT153 T09 C~8COV 2016 04 04.40435 12 18 51.18 -00 10 39.0 25.5g 99CT153 T09 C~8COV 2016 04 04.41295 12 18 51.15 -00 10 38.8 25.7g 99CT153 T09 C~8COV 2016 06 04.25196 12 15 48.06 +00 08 32.4 24.1z 99CT153 T09 C~8COV 2016 06 04.27037 12 15 48.05 +00 08 32.4 24.1z 99CT153 T09 C~8COV 2016 06 04.28656 12 15 48.03 +00 08 32.5 23.8z 99CT153 T09 C~8COV 2016 06 04.30275 12 15 48.02 +00 08 32.5 24.0z 99CT153 T09 C~8COV 2016 06 04.30544 12 15 48.02 +00 08 32.5 23.8z 99CT153 T09 C~8COV 2016 06 04.32707 12 15 47.98 +00 08 32.5 23.6z 99CT153 T09 C~8COV 2016 06 04.34057 12 15 47.98 +00 08 32.9 24.1z 99CT153 T09 C~8COV 2017 01 23.60759 12 28 15.03 -01 07 33.1 24.6i 99CT153 T09 C~8eIr 2017 01 23.61026 12 28 15.02 -01 07 33.3 24.5i 99CT153 T09 C~8eIr 2017 01 23.61293 12 28 15.02 -01 07 33.1 24.8i 99CT153 T09 C~8eIr 2017 01 23.61560 12 28 15.02 -01 07 33.1 24.5i 99CT153 T09 C~8eIr 2017 01 23.62095 12 28 15.00 -01 07 32.9 24.6i 99CT153 T09 C~8eIr 2017 01 23.64653 12 28 14.97 -01 07 32.6 24.8i 99CT153 T09 C~8eIr
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 0.26 0.00 -0.04
2 0.0002 0.00 -0.02 0.00 0.04
3 0.0876 0.00 0.04 0.00 -0.01
4 0.0877 0.00 -0.24 0.00 -0.02
5 3.1012 0.00 (-595.97) 0.00 ( 196.78)
6 3.1015 0.00 (-596.65) 0.00 ( 197.11)
7 17.1387 0.00 0.06 0.00 0.09
8 17.1387 0.00 0.00 0.00 0.25
9 17.1388 0.00 0.14 0.00 0.14
10 17.1389 0.00 -0.01 0.00 -0.08
11 17.1389 0.00 0.08 0.00 0.19
12 17.1389 0.00 0.05 0.00 -0.02
13 17.1439 0.00 -0.17 0.00 0.10
14 17.1440 0.00 -0.18 0.00 0.15
15 17.1441 0.00 -0.03 0.00 0.21
16 17.1441 0.00 0.09 0.00 0.17
17 17.3107 0.00 -0.16 0.00 -0.06
18 17.3107 0.00 -0.01 0.00 -0.15
19 17.3108 0.00 -0.06 0.00 -0.13
20 17.3108 0.00 0.05 0.00 -0.21
21 17.3108 0.00 0.09 0.00 -0.22
22 17.3109 0.00 -0.17 0.00 -0.32
23 17.3109 0.00 0.05 0.00 0.01
24 17.9496 0.00 0.04 0.00 0.06
25 17.9496 0.00 -0.05 0.00 -0.18
26 17.9496 0.00 0.01 0.00 -0.01
27 17.9496 0.00 0.07 0.00 -0.05
28 17.9496 0.00 -0.10 0.00 0.08
29 17.9497 0.00 0.03 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.
99CT153 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.741 44.741 44.741 ecceobj 0.097 0.097 0.097 incobj 4.555 4.555 4.555 qmin 39.619 39.616 39.624 qmax 50.506 50.514 50.505 amean 44.940 44.940 44.940 amin 44.579 44.581 44.572 amax 45.333 45.335 45.333 emean 0.100 0.100 0.100 emin 0.086 0.086 0.086 emax 0.115 0.115 0.115 imean 4.282 4.282 4.282 imin 3.694 3.693 3.694 imax 4.925 4.925 4.925 excite_mean 0.125 0.125 0.125 fracstop 1.000 1.000 1.000 cjmean 3.094 3.094 3.094 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 176.4 176.5 176.4 kozaiamp 180.0 179.9 179.9