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: 02AR217 # Created Sun Oct 19 01:08:33 2025 # Orbit generated from Bernstein formalism # Fitting 6 observations of 6 # Arc: 1.05d # First observation: 2002/01/10 # Last observation: 2002/01/11 # WARNING Fitting with energy constraint # WARNING and with gdot fixed = 0 # Chi-squared of fit: 2.89 DOF: 8 RMS: 0.12 # Min/Max residuals: -0.22 0.17 # Exact a, adot, b, bdot, g, gdot: 1.604419E-05 2.522163E-02 3.370062E-06 3.720302E-03 2.542711E-02 0.000000E+00 # Covariance matrix: 3.4719E-11 5.4849E-08 -1.0183E-13 -1.8159E-10 8.8215E-09 0.0000E+00 5.4849E-08 8.7955E-05 -1.6262E-10 -2.9034E-07 1.4098E-05 0.0000E+00 -1.0183E-13 -1.6262E-10 3.3180E-13 -1.0580E-10 -2.6113E-11 0.0000E+00 -1.8159E-10 -2.9034E-07 -1.0580E-10 1.3148E-07 -4.6596E-08 0.0000E+00 8.8215E-09 1.4098E-05 -2.6113E-11 -4.6596E-08 2.2630E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.1633E-04 # lat0 lon0 xBary yBary zBary JD0 -0.794018 98.012239 -0.202617 -0.013346 -0.957409 2452284.729960 # Heliocentric elements and errors Epoch: 2452280.5000 = 2002/01/06 Mean Anomaly: 8.94093 +/- 249.804 Argument of Peri: 345.12773 +/- 316.172 Long of Asc Node: 103.54727 +/- 2.051 Inclination: 8.40914 +/- 3.215 Eccentricity: 0.03280824 +/- 0.5678 Semi-Major Axis: 41.63967594 +/- 22.0236 Time of Perihelion: 2449843.0269 +/- 264380.5 Perihelion: 40.27355139 +/- 31.8247 Aphelion: 43.00580050 +/- 32.8095 Period (y) 268.7010 +/- 213.18 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -5.81447239 +/- 0.3241 Ecliptic Y 39.86587412 +/- 2.3038 Ecliptic Z -0.54487030 +/- 0.0322 Ecliptic XDOT -0.00269853 +/- 0.0009 Ecliptic YDOT -0.00037341 +/- 0.0016 Ecliptic ZDOT 0.00040076 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 40.29135009 +/- 2.2800 Geocenter to KBO 39.32810715 +/- 2.3267 # Hcoef: 7.63
The following table shows the complete astrometric record for 02AR217. 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 (02AR217) followed by the observatory code and reference code for the source of the astrometry.
2002 01 10.229217 06 34 40.90 +22 24 16.0 23.4R 02AR217 T09 C~90G3 2002 01 10.255609 06 34 40.77 +22 24 16.5 02AR217 T09 C~90G3 2002 01 10.277376 06 34 40.64 +22 24 16.7 02AR217 T09 C~90G3 2002 01 11.232044 06 34 35.47 +22 24 22.9 23.2R 02AR217 T09 C~90G3 2002 01 11.253844 06 34 35.36 +22 24 23.3 02AR217 T09 C~90G3 2002 01 11.275859 06 34 35.23 +22 24 23.6 02AR217 T09 C~90G3
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 -0.07 0.00 -0.22
2 0.0001 -1.83 0.11 0.39 0.10
3 0.0001 -3.64 -0.04 0.48 0.13
4 0.0027 -75.58 -0.03 2.38 -0.22
5 0.0028 -77.13 0.08 2.69 0.03
6 0.0029 -78.94 -0.06 2.88 0.17
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.
02AR217 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