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: 99CK158 # Created Sun Dec 22 02:08:02 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 21 observations of 21 # Arc: 25.09y # First observation: 1999/02/10 # Last observation: 2024/03/13 # Chi-squared of fit: 29.44 DOF: 36 RMS: 0.21 # Min/Max residuals: -0.33 0.70 # Exact a, adot, b, bdot, g, gdot: 1.553178E-05 2.626943E-02 4.956357E-06 8.073061E-03 2.652018E-02 1.211479E-03 # Covariance matrix: 3.8830E-13 -2.2732E-14 6.5629E-15 -4.3542E-15 5.0717E-13 -2.6140E-14 -2.2732E-14 9.4423E-15 -3.2802E-15 2.7056E-15 -1.2336E-14 1.3559E-14 6.5629E-15 -3.2802E-15 1.1962E-13 -7.0896E-15 5.2173E-15 -5.1147E-15 -4.3542E-15 2.7056E-15 -7.0896E-15 1.5911E-15 -2.1516E-15 4.2180E-15 5.0717E-13 -1.2336E-14 5.2173E-15 -2.1516E-15 9.9991E-13 -1.9558E-14 -2.6140E-14 1.3559E-14 -5.1147E-15 4.2180E-15 -1.9558E-14 2.1141E-14 # lat0 lon0 xBary yBary zBary JD0 -0.029190 127.280133 -0.242709 -0.000710 -0.963103 2451219.813693 # Heliocentric elements and errors Epoch: 2451220.5000 = 1999/02/11 Mean Anomaly: 42.84688 +/- 0.057 Argument of Peri: 310.93103 +/- 0.067 Long of Asc Node: 127.72239 +/- 0.000 Inclination: 17.11303 +/- 0.000 Eccentricity: 0.07351064 +/- 0.0001 Semi-Major Axis: 40.75196557 +/- 0.0066 Time of Perihelion: 2439911.1417 +/- 15.4 Perihelion: 37.75626252 +/- 0.0070 Aphelion: 43.74766862 +/- 0.0079 Period (y) 260.1543 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -23.60833683 +/- 0.0008 Ecliptic Y 30.62196416 +/- 0.0011 Ecliptic Z -0.01902678 +/- 0.0000 Ecliptic XDOT -0.00223556 +/- 0.0000 Ecliptic YDOT -0.00153380 +/- 0.0000 Ecliptic ZDOT 0.00083337 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 38.66595536 +/- 0.0010 Geocenter to KBO 37.70713849 +/- 0.0014 # Hcoef: 8.20
The following table shows the complete astrometric record for 99CK158. 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 (99CK158) followed by the observatory code and reference code for the source of the astrometry.
1999 02 10.31295 08 38 42.04 +18 25 24.4 23.8R 99CK158 568 Cb7527 1999 02 10.36472 08 38 41.77 +18 25 25.7 23.8R 99CK158 568 Cb7527 1999 02 10.40914 08 38 41.52 +18 25 26.9 23.8R 99CK158 568 Cb7527 1999 03 15.42036 08 36 15.92 +18 37 01.9 23.8R 99CK158 568 Cb7527 1999 03 15.47220 08 36 15.73 +18 37 02.7 23.8R 99CK158 568 Cb7527 1999 05 06.28539 08 35 36.13 +18 43 24.0 23.8R 99CK158 568 Cb7527 1999 05 06.33480 08 35 36.23 +18 43 24.2 23.8R 99CK158 568 Cb7527 1999 05 07.33848 08 35 38.23 +18 43 21.1 23.8R 99CK158 568 Cb7527 2000 04 04.35459 08 41 59.36 +18 45 26.6 24.1R 99CK158 568 Cb7527 2000 04 05.37207 08 41 57.88 +18 45 36.2 23.9R 99CK158 568 Cb7527 2000 04 06.31943 08 41 56.58 +18 45 44.7 24.1R 99CK158 568 Cb7527 2000 04 06.41384 08 41 56.48 +18 45 45.6 24.0R 99CK158 568 Cb7527 2001 03 24.17437 08 48 56.69 +18 46 08.3 23.2R 99CK158 695 Cc7487 2001 03 24.26888 08 48 56.42 +18 46 10.0 99CK158 695 Cc7487 2013 03 12.15589 10 07 10.82 +18 12 41.1 23.5R 99CK158 695 C~0uco 2013 03 12.21765 10 07 10.52 +18 12 42.4 99CK158 695 C~0uco 2013 03 13.14965 10 07 06.25 +18 13 05.8 99CK158 695 C~0uco 2018 02 18.251626 10 40 15.98 +17 15 34.2 99CK158 W84 C~3i8w 2018 02 18.253090 10 40 15.97 +17 15 34.2 99CK158 W84 C~3i8w 2024 03 13.279610 11 14 39.102 +16 12 29.73 24.2G 99CK158 G37 C~7wJW 2024 03 13.322190 11 14 38.916 +16 12 31.06 99CK158 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 0.02 0.00 -0.04
2 0.0001 0.00 0.09 0.00 0.00
3 0.0003 0.00 -0.12 0.00 0.12
4 0.0906 0.00 0.32 0.00 -0.07
5 0.0908 0.00 0.09 0.00 -0.13
6 0.2326 0.00 -0.25 0.00 -0.18
7 0.2328 0.00 -0.13 0.00 0.16
8 0.2355 0.00 0.17 0.00 -0.13
9 1.1473 0.00 0.03 0.00 -0.28
10 1.1501 0.00 0.01 0.00 -0.23
11 1.1527 0.00 -0.33 0.00 -0.27
12 1.1529 0.00 0.11 0.00 -0.18
13 2.1160 0.00 0.02 0.00 0.33
14 2.1162 0.00 -0.03 0.00 0.70
15 14.0831 0.00 0.02 0.00 0.31
16 14.0832 0.00 -0.12 0.00 0.05
17 14.0858 0.00 0.31 0.00 0.30
18 19.0224 0.00 -0.10 0.00 -0.15
19 19.0224 0.00 -0.14 0.00 -0.20
20 25.0868 0.00 -0.15 0.00 -0.09
21 25.0870 0.00 0.19 0.00 -0.07
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.
99CK158 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 40.872 40.872 40.872 ecceobj 0.076 0.076 0.076 incobj 17.092 17.092 17.092 qmin 36.830 36.825 36.844 qmax 45.151 45.144 45.152 amean 40.886 40.886 40.886 amin 40.561 40.565 40.571 amax 41.218 41.223 41.228 emean 0.079 0.079 0.079 emin 0.064 0.063 0.064 emax 0.096 0.096 0.096 imean 15.763 15.763 15.763 imin 14.845 14.844 14.847 imax 16.785 16.785 16.787 excite_mean 0.283 0.283 0.283 fracstop 1.000 1.000 1.000 cjmean 2.973 2.973 2.973 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 178.5 178.4 178.3 kozaiamp 180.0 180.0 179.9