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: 99CH154 # Created Sat Apr 27 01:09:48 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 17 observations of 17 # Arc: 25.08y # First observation: 1999/02/12 # Last observation: 2024/03/13 # Chi-squared of fit: 47.01 DOF: 28 RMS: 0.29 # Min/Max residuals: -0.48 1.02 # Exact a, adot, b, bdot, g, gdot: 1.604960E-05 2.285663E-02 1.497137E-06 2.767567E-04 2.381410E-02 1.493569E-04 # Covariance matrix: 6.7288E-13 -1.1706E-14 -2.7592E-15 -9.5082E-18 1.0382E-12 -1.5537E-14 -1.1706E-14 1.4412E-14 -3.3447E-16 1.7040E-16 3.2854E-14 2.2369E-14 -2.7592E-15 -3.3447E-16 1.5578E-13 -7.4938E-15 -6.6255E-15 -5.0154E-16 -9.5082E-18 1.7040E-16 -7.4938E-15 7.9425E-16 4.9897E-16 2.7914E-16 1.0382E-12 3.2854E-14 -6.6255E-15 4.9897E-16 2.2102E-12 3.6457E-14 -1.5537E-14 2.2369E-14 -5.0154E-16 2.7914E-16 3.6457E-14 3.6882E-14 # lat0 lon0 xBary yBary zBary JD0 -0.478139 130.724530 -0.218266 -0.008310 -0.969442 2451221.790693 # Heliocentric elements and errors Epoch: 2451222.5000 = 1999/02/13 Mean Anomaly: 92.53314 +/- 0.759 Argument of Peri: 232.02702 +/- 0.726 Long of Asc Node: 164.78382 +/- 0.002 Inclination: 0.84055 +/- 0.000 Eccentricity: 0.01454704 +/- 0.0000 Semi-Major Axis: 42.91994129 +/- 0.0105 Time of Perihelion: 2424823.8397 +/- 216.7 Perihelion: 42.29558333 +/- 0.0104 Aphelion: 43.54429925 +/- 0.0107 Period (y) 281.1881 +/- 0.10 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -28.18569468 +/- 0.0017 Ecliptic Y 32.41466098 +/- 0.0020 Ecliptic Z -0.35036264 +/- 0.0000 Ecliptic XDOT -0.00200455 +/- 0.0000 Ecliptic YDOT -0.00169220 +/- 0.0000 Ecliptic ZDOT 0.00003168 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.95655472 +/- 0.0019 Geocenter to KBO 41.99196426 +/- 0.0026 # Hcoef: 7.67
The following table shows the complete astrometric record for 99CH154. 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 (99CH154) followed by the observatory code and reference code for the source of the astrometry.
1999 02 12.28995 08 52 09.81 +17 05 06.1 23.5R 99CH154 568 Ca4208 1999 02 12.38212 08 52 09.39 +17 05 08.1 23.5R 99CH154 568 Ca4208 1999 03 16.24594 08 49 58.49 +17 14 09.9 23.5R 99CH154 568 Ca4208 1999 03 16.27012 08 49 58.41 +17 14 10.3 23.5R 99CH154 568 Ca4208 2000 04 05.30314 08 54 22.15 +16 57 38.0 24.1R 99CH154 568 Cb1943 2000 04 05.40522 08 54 21.98 +16 57 38.7 24.1R 99CH154 568 Cb1943 2000 04 06.37495 08 54 20.46 +16 57 45.8 24.1R 99CH154 568 Cb1943 2000 04 07.32321 08 54 19.07 +16 57 52.4 24.1R 99CH154 568 Cb1943 2001 03 24.20123 09 00 02.52 +16 34 55.7 22.6R 99CH154 695 Cc7487 2001 03 24.30328 09 00 02.25 +16 34 56.9 99CH154 695 Cc7487 2013 03 12.15117 10 02 04.86 +11 47 38.3 23.4R 99CH154 695 C~59cS 2013 03 12.21356 10 02 04.62 +11 47 40.4 99CH154 695 C~59cS 2015 03 16.14795 10 11 49.77 +10 56 23.3 24.2R 99CH154 G37 C~1N5b 2015 03 16.21631 10 11 49.50 +10 56 24.2 99CH154 G37 C~1N5b 2024 03 13.264660 10 56 03.578 +06 46 35.39 23.9G 99CH154 G37 C~7wJW 2024 03 13.306890 10 56 03.393 +06 46 36.41 99CH154 G37 C~7wJW 2024 03 13.348300 10 56 03.217 +06 46 37.48 99CH154 G37 C~7wJW
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 -0.21
2 0.0003 0.00 0.12 0.00 -0.03
3 0.0875 0.00 -0.26 0.00 -0.42
4 0.0876 0.00 -0.27 0.00 -0.35
5 1.1445 0.00 -0.05 0.00 -0.10
6 1.1447 0.00 -0.02 0.00 -0.13
7 1.1474 0.00 -0.07 0.00 -0.01
8 1.1500 0.00 0.08 0.00 0.10
9 2.1106 0.00 0.23 0.00 0.33
10 2.1109 0.00 0.48 0.00 0.30
11 14.0776 0.00 -0.13 0.00 0.36
12 14.0778 0.00 0.24 0.00 1.02
13 16.0872 0.00 -0.05 0.00 0.22
14 16.0874 0.00 0.18 0.00 -0.48
15 25.0814 0.00 -0.15 0.00 -0.12
16 25.0815 0.00 -0.10 0.00 -0.25
17 25.0816 0.00 0.02 0.00 -0.30
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.
99CH154 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.045 43.045 43.045 ecceobj 0.015 0.015 0.015 incobj 0.842 0.842 0.842 qmin 41.219 41.219 41.213 qmax 45.135 45.140 45.136 amean 43.082 43.082 43.082 amin 42.752 42.751 42.752 amax 43.418 43.418 43.418 emean 0.024 0.024 0.024 emin 0.003 0.003 0.003 emax 0.040 0.040 0.040 imean 2.142 2.142 2.142 imin 1.107 1.107 1.107 imax 2.859 2.860 2.859 excite_mean 0.045 0.045 0.045 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 196.6 196.6 196.6 kozaiamp 180.0 180.0 180.0