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: 120178 # Created Fri May 2 02:36:21 2008 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 40 observations of 41 # Arc: 15.12y # First observation: 1990/07/21 # Last observation: 2005/09/01 # Chi-squared of fit: 328.47 DOF: 74 RMS: 0.51 # Min/Max residuals: -1.48 0.85 # Exact a, adot, b, bdot, g, gdot: 1.654036E-05 2.597652E-02 -2.158877E-06 -5.641203E-03 2.573488E-02 1.858910E-03 # 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 25.077303 -59.384917 0.037856 0.430322 -0.919512 2448093.835042 # Heliocentric elements and errors Epoch: 2448095.5000 = 1990/07/23 Mean Anomaly: 38.76209 +/- 0.000 Argument of Peri: 67.88111 +/- 0.000 Long of Asc Node: 182.98832 +/- 0.000 Inclination: 27.16129 +/- 0.000 Eccentricity: 0.10409238 +/- 0.0000 Semi-Major Axis: 43.06870270 +/- 0.0000 Time of Perihelion: 2436979.5704 +/- 0.0 Perihelion: 38.58557887 +/- 0.0000 Aphelion: 47.55182653 +/- 0.0000 Period (y) 282.6512 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 18.40826497 +/- 0.0000 Ecliptic Y -31.18212714 +/- 0.0000 Ecliptic Z 16.46944043 +/- 0.0000 Ecliptic XDOT 0.00259410 +/- 0.0000 Ecliptic YDOT 0.00103254 +/- 0.0000 Ecliptic ZDOT -0.00045967 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.77974568 +/- 0.0000 Geocenter to KBO 38.85776230 +/- 0.0000 # Hcoef: 4.17
The following table shows the complete astrometric record for 120178. 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 (120178) followed by the observatory code and reference code for the source of the astrometry.
1990 07 21.33438 19 50 14.78 +04 31 11.6 120178 261 x3180 2001 06 01.57872 20 58 46.95 +04 12 03.2 19.7R 120178 608 Cn8883 2001 08 12.24278 20 54 16.52 +04 04 47.0 20.3R 120178 644 Cn8883 2001 08 12.25330 20 54 16.49 +04 04 46.9 20.3R 120178 644 Cn8883 2001 08 12.25331 20 54 16.35 +04 04 49.4 120178 644 CEP010 2001 08 12.26376 20 54 16.39 +04 04 47.3 20.4R 120178 644 Cn8883 2001 08 18.19748 20 53 49.22 +04 01 54.2 19.9R 120178 644 Cn8883 2001 08 18.20767 20 53 49.12 +04 01 53.9 20.1R 120178 644 Cn8883 2001 08 18.21889 20 53 49.08 +04 01 53.3 120178 644 Cn8883 2001 09 23.11527 20 51 34.81 +03 40 19.9 19.9R 120178 644 Cn8883 2001 09 23.15875 20 51 34.68 +03 40 18.2 20.0R 120178 644 Cn8883 2002 06 22.45957 21 03 40.67 +04 13 02.2 20.0R 120178 644 Cn8883 2002 06 22.46998 21 03 40.64 +04 13 02.0 19.9R 120178 644 Cn8883 2002 06 22.48034 21 03 40.57 +04 13 02.2 20.3R 120178 644 Cn8883 2002 07 01.47836 21 03 09.84 +04 13 09.1 20.0R 120178 644 Cn8883 2002 07 09.29933 21 02 39.41 +04 12 31.8 19.9R 120178 644 Cn8883 2002 07 09.31486 21 02 39.32 +04 12 31.6 20.1R 120178 644 Cn8883 2002 07 09.33280 21 02 39.25 +04 12 31.5 20.0R 120178 644 Cn8883 2002 07 19.30814 21 01 56.72 +04 10 45.4 20.1R 120178 644 Cn8883 2002 07 19.33027 21 01 56.64 +04 10 45.3 20.2R 120178 644 Cn8883 2002 07 19.36236 21 01 56.48 +04 10 44.7 20.1R 120178 644 Cn8883 2002 08 25.27794 20 59 07.39 +03 55 51.7 19.9R 120178 644 Cn8883 2002 08 25.29913 20 59 07.28 +03 55 50.7 20.2R 120178 644 Cn8883 2002 08 25.32019 20 59 07.19 +03 55 49.9 20.0R 120178 644 Cn8883 2002 09 21.26134 20 57 27.20 +03 39 21.5 20.2R 120178 644 Cn8883 2002 09 21.28257 20 57 27.13 +03 39 20.8 19.9R 120178 644 Cn8883 2002 09 21.30355 20 57 27.06 +03 39 19.6 19.8R 120178 644 Cn8883 2002 10 18.29415 20 56 37.98 +03 22 00.7 19.5R 120178 644 Cn9310 2003 07 26.26364 21 07 12.92 +04 06 18.2 20.3R 120178 675 Cn8883 2003 07 26.34922 21 07 12.54 +04 06 16.6 20.0R 120178 675 Cn8883 2003 07 26.41359 21 07 12.24 +04 06 15.3 19.8R 120178 675 Cn8883 2003 07 28.58493 21 07 02.36 +04 05 34.1 20.1R 120178 608 Cn8883 2003 08 10.22417 21 06 03.6 +04 00 47. 19.8R 120178 675 YCn8883 2003 08 30.15904 21 04 34.1 +03 50 39. 19.8R 120178 675 YCn8883 2004 09 22.17348 21 08 51.69 +03 33 14.5 19.9R 120178 675 Cn8883 2004 09 22.21505 21 08 51.59 +03 33 13.1 20.0R 120178 675 Cn8883 2004 09 22.23896 21 08 51.49 +03 33 12.1 20.0R 120178 675 Cn8883 2005 08 07.02664 21 17 45.45 +03 56 09.1 120178 J95 Cn9310 2005 08 07.07366 21 17 45.20 +03 56 07.6 20.1R 120178 J95 Cn9310 2005 09 01.89250 21 15 49.47 +03 43 08.9 19.5R 120178 143 Co1078 2005 09 03.81220 21 15 41.43 +03 42 02.0 18.9R 120178 143 Co1078
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 -0.17 0.00 -1.48 2 10.8645 0.00 0.79 0.00 -0.74 3 11.0607 0.00 0.52 0.00 -0.47 4 11.0607 0.00 0.82 0.00 -0.28 5 11.0607 0.00 ( -1.28) 0.00 ( 2.22) 6 11.0607 0.00 0.06 0.00 0.41 7 11.0770 0.00 0.45 0.00 -0.23 8 11.0770 0.00 -0.35 0.00 -0.22 9 11.0770 0.00 -0.18 0.00 -0.48 10 11.1753 0.00 0.38 0.00 0.39 11 11.1754 0.00 0.21 0.00 0.40 12 11.9209 0.00 -0.08 0.00 0.37 13 11.9210 0.00 -0.03 0.00 0.13 14 11.9210 0.00 -0.58 0.00 0.29 15 11.9456 0.00 0.42 0.00 0.30 16 11.9671 0.00 -0.26 0.00 0.31 17 11.9671 0.00 -0.65 0.00 0.22 18 11.9671 0.00 -0.59 0.00 0.25 19 11.9945 0.00 -0.03 0.00 0.06 20 11.9945 0.00 0.27 0.00 0.26 21 11.9946 0.00 0.04 0.00 0.11 22 12.0957 0.00 0.24 0.00 0.40 23 12.0957 0.00 0.00 0.00 0.10 24 12.0958 0.00 0.04 0.00 -0.01 25 12.1695 0.00 0.54 0.00 0.05 26 12.1696 0.00 0.44 0.00 0.18 27 12.1697 0.00 0.32 0.00 -0.20 28 12.2436 0.00 -1.05 0.00 0.38 29 13.0128 0.00 0.06 0.00 0.85 30 13.0130 0.00 0.28 0.00 0.77 31 13.0132 0.00 0.24 0.00 0.62 32 13.0192 0.00 0.81 0.00 -0.45 33 13.0538 0.00 -1.25 0.00 -0.69 34 13.1083 0.00 -1.37 0.00 -0.35 35 14.1734 0.00 0.15 0.00 -0.21 36 14.1735 0.00 0.56 0.00 0.00 37 14.1736 0.00 0.16 0.00 -0.07 38 15.0464 0.00 0.75 0.00 -0.22 39 15.0465 0.00 0.30 0.00 -0.57 40 15.1172 0.00 0.64 0.00 -0.73 41 15.1225 0.00 -0.99 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.
120178 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 43.245 43.246 43.245 ecceobj 0.104 0.104 0.104 incobj 27.112 27.112 27.112 qmin 38.090 38.089 38.091 qmax 48.698 48.699 48.699 amean 43.254 43.254 43.254 amin 42.909 42.915 42.905 amax 43.618 43.612 43.618 emean 0.102 0.102 0.102 emin 0.089 0.089 0.089 emax 0.117 0.117 0.117 imean 27.020 27.020 27.020 imin 26.670 26.670 26.670 imax 27.374 27.384 27.377 fracstop 1.000 1.000 1.000 cjmean 2.821 2.821 2.821 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 188.8 188.9 189.0 kozaiamp 180.0 179.9 180.0