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: 99CX118 # Created Wed Nov 27 02:07:55 2024 # Orbit generated from Bernstein formalism # Fitting 6 observations of 6 # Arc: 61.99d # First observation: 1999/02/10 # Last observation: 1999/04/13 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.018271 0.000001 0.000653 0.022264 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # Chi-squared of fit: 1.57 DOF: 7 RMS: 0.09 # Min/Max residuals: -0.14 0.22 # Exact a, adot, b, bdot, g, gdot: 1.235724E-05 1.740139E-02 1.155244E-06 6.518841E-04 2.207838E-02 -1.115411E-02 # Covariance matrix: 6.2455E-12 8.3523E-09 8.9845E-14 3.2863E-12 1.4863E-09 3.0783E-08 8.3523E-09 1.2591E-05 1.3718E-10 4.6710E-09 2.2316E-06 4.3942E-05 8.9845E-14 1.3718E-10 4.1856E-13 -2.6789E-12 2.4289E-11 4.7199E-10 3.2863E-12 4.6710E-09 -2.6789E-12 4.4945E-11 8.3147E-10 1.7368E-08 1.4863E-09 2.2316E-06 2.4289E-11 8.3147E-10 3.9561E-07 7.8195E-06 3.0783E-08 4.3942E-05 4.7199E-10 1.7368E-08 7.8195E-06 1.6263E-04 # lat0 lon0 xBary yBary zBary JD0 -0.135046 172.102235 0.503956 -0.002248 -0.855931 2451219.999173 # Heliocentric elements and errors Epoch: 2451210.5000 = 1999/02/01 Mean Anomaly: 303.35288 +/- 55.169 Argument of Peri: 118.22180 +/- 7.113 Long of Asc Node: 174.96793 +/- 0.723 Inclination: 2.17387 +/- 0.461 Eccentricity: 0.54949264 +/- 0.5214 Semi-Major Axis: 47.00723125 +/- 24.3088 Time of Perihelion: 2469733.9042 +/- 10908.0 Perihelion: 21.17710368 +/- 26.8465 Aphelion: 72.83735883 +/- 44.9395 Period (y) 322.2962 +/- 250.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -45.63378577 +/- 1.2781 Ecliptic Y 6.83983284 +/- 0.1774 Ecliptic Z -0.10669547 +/- 0.0030 Ecliptic XDOT 0.00107168 +/- 0.0017 Ecliptic YDOT -0.00231842 +/- 0.0002 Ecliptic ZDOT 0.00008410 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.14365721 +/- 1.2642 Geocenter to KBO 45.29316815 +/- 1.2903 # Hcoef: 6.96
The following table shows the complete astrometric record for 99CX118. 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 (99CX118) followed by the observatory code and reference code for the source of the astrometry.
1999 02 10.49843 11 30 46.40 +03 00 32.7 23.0R 99CX118 568 Ca4013 1999 02 10.54462 11 30 46.23 +03 00 33.8 23.0R 99CX118 568 Ca4013 1999 02 18.58637 11 30 16.32 +03 03 48.8 23.0R 99CX118 568 Ca4013 1999 02 18.59797 11 30 16.28 +03 03 49.2 23.0R 99CX118 568 Ca4013 1999 04 13.41191 11 26 38.40 +03 27 30.1 23.8R 99CX118 568 Ca4506 1999 04 13.48486 11 26 38.14 +03 27 31.7 23.8R 99CX118 568 Ca4506
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 -0.14
2 0.0001 -2.77 -0.02 0.01 -0.13
3 0.0221 -491.39 -0.02 2.45 0.09
4 0.0222 -492.09 0.02 2.58 0.22
5 0.1695 -4051.42 -0.02 22.83 0.01
6 0.1697 -4055.63 0.02 22.76 -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.
99CX118 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0