The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory.
# Object: 120348 # Created Fri May 2 02:36:21 2008 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 20 observations of 21 # Arc: 22.13y # First observation: 1983/07/16 # Last observation: 2005/08/31 # Chi-squared of fit: 124.99 DOF: 34 RMS: 0.44 # Min/Max residuals: -1.82 0.63 # Exact a, adot, b, bdot, g, gdot: 1.138720E-05 2.214418E-02 -5.705762E-06 -8.486369E-03 2.478064E-02 -4.406698E-04 # Covariance matrix: 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 # lat0 lon0 xBary yBary zBary JD0 -13.332464 -7.943402 0.854252 -0.124131 -0.524951 2445532.274027 # Heliocentric elements and errors Epoch: 2445530.5000 = 1983/07/15 Mean Anomaly: 216.25436 +/- 0.000 Argument of Peri: 0.66613 +/- 0.000 Long of Asc Node: 140.46434 +/- 0.000 Inclination: 24.82560 +/- 0.000 Eccentricity: 0.06448402 +/- 0.0000 Semi-Major Axis: 38.81473780 +/- 0.0000 Time of Perihelion: 2480798.8854 +/- 0.0 Perihelion: 36.31180734 +/- 0.0000 Aphelion: 41.31766825 +/- 0.0000 Period (y) 241.8261 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 39.30153267 +/- 0.0000 Ecliptic Y -6.35524462 +/- 0.0000 Ecliptic Z -9.30597749 +/- 0.0000 Ecliptic XDOT 0.00008494 +/- 0.0000 Ecliptic YDOT 0.00245603 +/- 0.0000 Ecliptic ZDOT -0.00090126 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.88523727 +/- 0.0000 Geocenter to KBO 40.35412568 +/- 0.0000 # Hcoef: 4.25
The following table shows the complete astrometric record for 120348. 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 (120348) followed by the observatory code and reference code for the source of the astrometry.
1983 07 16.77340 23 52 28.61 -15 22 14.2 120348 260 o1719 1983 10 07.53708 23 47 15.30 -16 11 29.4 120348 260 o1719 1991 09 06.65410 00 35 30.17 -15 03 03.1 120348 260 o1719 2001 08 20.54252 01 33 59.72 -12 56 32.0 19.9R 120348 608 Co1719 2001 09 21.33655 01 32 15.26 -13 19 13.3 19.4R 120348 644 Co1719 2001 10 14.46036 01 30 28.46 -13 32 59.0 19.9R 120348 644 Co1719 2002 08 23.49326 01 39 39.86 -12 44 12.4 19.9R 120348 644 Co1719 2002 08 24.48409 01 39 37.65 -12 44 55.0 20.2R 120348 644 Co1719 2002 11 05.15694 01 34 34.70 -13 27 18.3 120348 644 Cn8896 2002 11 05.17840 01 34 35.05 -13 27 19.1 19.8R 120348 644 Co1719 2004 08 19.39730 01 51 18.35 -12 11 43.5 120348 675 Cn8896 2004 08 25.40102 01 51 06.66 -12 16 01.7 120348 675 Cn8897 2004 10 03.28506 01 48 48.56 -12 43 10.3 19.8R 120348 675 Cn8897 2004 10 03.35041 01 48 48.28 -12 43 12.6 20.3R 120348 675 Cn8897 2004 10 03.41437 01 48 47.95 -12 43 15.0 20.0R 120348 675 Cn8897 2004 10 04.27879 01 48 43.98 -12 43 47.2 20.1R 120348 675 Cn8897 2004 10 04.34391 01 48 43.68 -12 43 49.6 19.7R 120348 675 Cn8897 2004 10 04.40960 01 48 43.36 -12 43 51.8 19.8R 120348 675 Cn8897 2005 08 30.08059 01 56 42.78 -12 03 31.7 20.5R 120348 461 Co0223 2005 08 31.09351 01 56 40.23 -12 04 16.1 120348 461 Co0223 2005 09 01.07690 01 56 37.74 -12 04 58.8 20. R 120348 461 Co1097
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 -0.11 0.00 -1.82 2 0.2266 0.00 -0.37 0.00 -0.61 3 8.1420 0.00 -0.12 0.00 0.54 4 18.0966 0.00 0.06 0.00 0.15 5 18.1836 0.00 -0.08 0.00 -0.19 6 18.2469 0.00 -0.14 0.00 -0.47 7 19.1040 0.00 -0.35 0.00 0.17 8 19.1067 0.00 0.27 0.00 0.40 9 19.3056 0.00 ( -6.12) 0.00 ( 0.55) 10 19.3057 0.00 0.63 0.00 0.10 11 21.0941 0.00 0.22 0.00 -0.40 12 21.1105 0.00 -0.29 0.00 -0.65 13 21.2170 0.00 0.06 0.00 0.50 14 21.2172 0.00 0.43 0.00 0.62 15 21.2174 0.00 -0.05 0.00 0.57 16 21.2197 0.00 -0.09 0.00 0.05 17 21.2199 0.00 -0.01 0.00 0.03 18 21.2201 0.00 -0.18 0.00 0.22 19 22.1227 0.00 0.31 0.00 -0.28 20 22.1254 0.00 -0.21 0.00 -0.40 21 22.1281 0.00 0.23 0.00 -0.06
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.
120348 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 39.153 39.153 39.153 ecceobj 0.063 0.063 0.063 incobj 24.822 24.822 24.822 qmin 35.409 35.477 35.363 qmax 42.508 42.503 42.514 amean 38.869 38.868 38.864 amin 38.574 38.558 38.562 amax 39.200 39.187 39.178 emean 0.070 0.069 0.070 emin 0.056 0.056 0.056 emax 0.085 0.085 0.087 imean 23.780 23.786 23.779 imin 23.039 23.060 23.046 imax 24.497 24.503 24.508 fracstop 1.000 1.000 1.000 cjmean 2.849 2.849 2.849 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 172.0 172.0 172.5 kozaiamp 180.0 180.0 180.0