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: 312645 # Created Thu May 24 01:36:55 2012 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 75 observations of 75 # Arc: 29.00y # First observation: 1983/04/14 # Last observation: 2012/04/14 # Chi-squared of fit: 269.57 DOF: 144 RMS: 0.34 # Min/Max residuals: -0.86 1.77 # Exact a, adot, b, bdot, g, gdot: 1.575256E-05 2.870364E-02 3.927848E-06 3.000331E-03 2.663671E-02 -7.645455E-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 -17.963791 133.767525 -0.935247 -0.104480 -0.323133 2445438.908116 # Heliocentric elements and errors Epoch: 2445438.5000 = 1983/04/14 Mean Anomaly: 324.93183 +/- 0.000 Argument of Peri: 352.27192 +/- 0.000 Long of Asc Node: 205.16871 +/- 0.000 Inclination: 18.87562 +/- 0.000 Eccentricity: 0.30763109 +/- 0.0000 Semi-Major Axis: 47.64205021 +/- 0.0000 Time of Perihelion: 2457138.7391 +/- 0.0 Perihelion: 32.98587428 +/- 0.0000 Aphelion: 62.29822615 +/- 0.0000 Period (y) 328.8470 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -25.61911601 +/- 0.0000 Ecliptic Y 25.37916853 +/- 0.0000 Ecliptic Z -11.57851103 +/- 0.0000 Ecliptic XDOT -0.00167192 +/- 0.0000 Ecliptic YDOT -0.00251644 +/- 0.0000 Ecliptic ZDOT 0.00053558 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.87499168 +/- 0.0000 Geocenter to KBO 37.54239581 +/- 0.0000 # Hcoef: 5.50
The following table shows the complete astrometric record for 312645. 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 (312645) followed by the observatory code and reference code for the source of the astrometry.
1983 04 14.40750 08 44 36.21 -00 33 23.6 312645 260 ~0PnZ 1986 04 03.43555 09 04 49.37 -01 32 25.1 312645 260 ~0PnZ 1988 02 20.54792 09 21 28.39 -02 34 44.4 312645 260 ~0PnZ 2002 01 26.55054 11 12 22.86 -07 01 19.8 20.1R 312645 644 C~0PnZ 2002 02 07.56216 11 11 33.49 -06 57 46.0 20.3R 312645 644 C~0PnZ 2002 02 08.54102 11 11 29.03 -06 57 24.1 19.7R 312645 644 C~0PnZ 2002 03 06.44735 11 09 18.10 -06 44 00.3 20.0R 312645 644 C~0PnZ 2002 03 14.41058 11 08 35.84 -06 38 47.7 20.2R 312645 644 C~0PnZ 2002 03 15.45076 11 08 30.36 -06 38 05.3 20.2R 312645 644 C~0PnZ 2002 04 05.16778 11 06 48.63 -06 23 19.3 20.8R 312645 644 C~0PnZ 2002 04 08.17455 11 06 35.52 -06 21 08.2 20.0R 312645 644 C~0PnZ 2002 04 19.17383 11 05 52.87 -06 13 17.8 20.3R 312645 644 C~0PnZ 2005 04 03.27653 11 32 30.67 -07 14 25.7 20.4R 312645 644 C~0PnZ 2005 04 03.33965 11 32 30.37 -07 14 23.1 20.7R 312645 644 C~0PnZ 2005 04 03.40171 11 32 30.03 -07 14 20.5 21.2R 312645 644 C~0PnZ 2010 03 09.08269 12 18 39.620 -08 44 02.22 20.1R 312645 809 C~0F7m 2010 03 09.16708 12 18 39.181 -08 43 59.19 20.4R 312645 809 C~0F7m 2010 03 09.24981 12 18 38.763 -08 43 56.31 20.4R 312645 809 C~0F7m 2010 03 10.08103 12 18 34.537 -08 43 26.58 20.2R 312645 809 C~0F7m 2010 03 10.16556 12 18 34.105 -08 43 23.48 20.4R 312645 809 C~0F7m 2010 03 10.21843 12 18 33.818 -08 43 22.35 20.4R 312645 807 C~0F7m 2010 03 10.24875 12 18 33.644 -08 43 20.64 20.2R 312645 809 C~0F7m 2010 03 10.25815 12 18 33.610 -08 43 20.88 20.2R 312645 807 C~0F7m 2010 03 10.31289 12 18 33.325 -08 43 18.94 20.3R 312645 807 C~0F7m 2010 03 12.27362 12 18 23.235 -08 42 07.21 312645 807 C~0F7m 2010 03 12.32119 12 18 22.982 -08 42 05.55 312645 807 C~0F7m 2010 03 25.22286 12 17 14.467 -08 33 39.25 20.2R 312645 807 C~0Fo2 2010 03 25.26579 12 17 14.229 -08 33 37.37 20.3R 312645 807 C~0Fo2 2010 04 22.04637 12 14 52.225 -08 13 55.89 20.4R 312645 807 C~0Gty 2010 04 22.07569 12 14 52.091 -08 13 54.47 20.4R 312645 807 C~0Gty 2010 06 04.07471 12 12 46.434 -07 49 03.53 312645 807 C~0IRj 2011 03 12.08338 12 27 20.09 -08 54 41.4 20.2R 312645 304 C~0U0v 2011 03 12.08765 12 27 20.05 -08 54 41.4 312645 304 C~0U0v 2011 03 12.13659 12 27 19.80 -08 54 39.5 312645 304 C~0U0v 2011 03 12.14086 12 27 19.78 -08 54 39.4 312645 304 C~0U0v 2011 03 12.18500 12 27 19.55 -08 54 37.9 312645 304 C~0U0v 2011 03 12.18927 12 27 19.53 -08 54 37.7 312645 304 C~0U0v 2011 03 12.25153 12 27 19.20 -08 54 35.4 312645 304 C~0U0v 2011 03 12.25580 12 27 19.18 -08 54 35.2 312645 304 C~0U0v 2011 03 12.27303 12 27 19.09 -08 54 34.6 312645 304 C~0U0v 2011 03 12.29030 12 27 19.00 -08 54 34.0 312645 304 C~0U0v 2011 03 12.29456 12 27 18.98 -08 54 33.8 312645 304 C~0U0v 2011 03 12.34162 12 27 18.74 -08 54 32.1 312645 304 C~0U0v 2011 03 12.34589 12 27 18.71 -08 54 32.0 312645 304 C~0U0v 2011 03 13.06729 12 27 15.05 -08 54 05.6 312645 304 C~0U0v 2011 03 13.07156 12 27 15.02 -08 54 05.5 312645 304 C~0U0v 2011 03 13.07583 12 27 15.00 -08 54 05.3 312645 304 C~0U0v 2011 03 13.13623 12 27 14.69 -08 54 03.1 312645 304 C~0U0v 2011 03 13.14050 12 27 14.67 -08 54 03.0 312645 304 C~0U0v 2011 03 13.14477 12 27 14.65 -08 54 02.8 312645 304 C~0U0v 2011 03 13.17916 12 27 14.46 -08 54 01.5 312645 304 C~0U0v 2011 03 13.18344 12 27 14.44 -08 54 01.4 312645 304 C~0U0v 2011 03 13.18772 12 27 14.42 -08 54 01.2 312645 304 C~0U0v 2011 03 13.25832 12 27 14.05 -08 53 58.7 312645 304 C~0U0v 2011 03 13.26368 12 27 14.02 -08 53 58.5 312645 304 C~0U0v 2011 03 13.26794 12 27 14.00 -08 53 58.3 312645 304 C~0U0v 2011 03 13.32410 12 27 13.70 -08 53 56.2 312645 304 C~0U0v 2011 03 13.32837 12 27 13.68 -08 53 56.1 312645 304 C~0U0v 2011 03 13.33267 12 27 13.66 -08 53 55.9 312645 304 C~0U0v 2011 12 28.450382 12 38 45.906 -09 21 20.00 21.2R 312645 697 C~0byp 2011 12 28.460139 12 38 45.927 -09 21 20.24 21.5R 312645 697 C~0byp 2011 12 29.492917 12 38 47.820 -09 21 34.56 20.8R 312645 697 C~0byp 2011 12 29.496134 12 38 47.824 -09 21 34.63 21.0R 312645 697 C~0byp 2011 12 30.493171 12 38 49.569 -09 21 48.53 20.9R 312645 697 C~0byp 2011 12 30.496400 12 38 49.583 -09 21 48.36 20.9R 312645 697 C~0byp 2012 03 19.06661 12 35 36.82 -09 01 26.6 20.2R 312645 304 C~0gtF 2012 03 19.19758 12 35 36.12 -09 01 21.5 312645 304 C~0gtF 2012 03 19.38003 12 35 35.14 -09 01 14.5 312645 304 C~0gtF 2012 03 20.10847 12 35 31.32 -09 00 46.3 312645 304 C~0gtF 2012 03 20.20936 12 35 30.77 -09 00 42.3 312645 304 C~0gtF 2012 03 20.36802 12 35 29.92 -09 00 36.1 312645 304 C~0gtF 2012 04 14.34248 12 33 16.935 -08 43 22.55 20.5w 312645 F51 C~0g5i 2012 04 14.35734 12 33 16.841 -08 43 21.78 20.6w 312645 F51 C~0g5i 2012 04 14.37217 12 33 16.777 -08 43 21.26 20.5w 312645 F51 C~0g5i 2012 04 14.38700 12 33 16.686 -08 43 20.52 20.5w 312645 F51 C~0g5i
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 -0.22 0.00 1.77 2 2.9706 0.00 -0.15 0.00 0.20 3 4.8546 0.00 0.17 0.00 -0.26 4 18.7875 0.00 0.93 0.00 0.77 5 18.8204 0.00 0.19 0.00 -0.56 6 18.8231 0.00 -0.23 0.00 -0.86 7 18.8940 0.00 0.01 0.00 -0.22 8 18.9158 0.00 -0.48 0.00 0.05 9 18.9187 0.00 -0.63 0.00 0.07 10 18.9754 0.00 -0.23 0.00 0.31 11 18.9836 0.00 -0.49 0.00 0.54 12 19.0137 0.00 -0.14 0.00 0.29 13 21.9709 0.00 0.43 0.00 -0.03 14 21.9711 0.00 0.65 0.00 -0.19 15 21.9712 0.00 0.16 0.00 -0.31 16 26.9012 0.00 0.46 0.00 0.78 17 26.9015 0.00 0.39 0.00 0.82 18 26.9017 0.00 0.55 0.00 0.76 19 26.9040 0.00 0.48 0.00 0.71 20 26.9042 0.00 0.58 0.00 0.78 21 26.9043 0.00 0.40 0.00 0.01 22 26.9044 0.00 0.17 0.00 0.63 23 26.9045 0.00 0.39 0.00 0.05 24 26.9046 0.00 0.40 0.00 0.01 25 26.9100 0.00 0.48 0.00 0.15 26 26.9101 0.00 0.45 0.00 0.05 27 26.9454 0.00 0.26 0.00 0.23 28 26.9455 0.00 0.22 0.00 0.35 29 27.0216 0.00 0.07 0.00 0.25 30 27.0217 0.00 0.11 0.00 0.44 31 27.1394 0.00 -0.02 0.00 0.36 32 27.9088 0.00 0.14 0.00 -0.15 33 27.9088 0.00 -0.13 0.00 -0.31 34 27.9089 0.00 -0.09 0.00 -0.17 35 27.9089 0.00 -0.05 0.00 -0.23 36 27.9090 0.00 -0.07 0.00 -0.32 37 27.9091 0.00 -0.04 0.00 -0.28 38 27.9092 0.00 -0.13 0.00 -0.23 39 27.9092 0.00 -0.09 0.00 -0.19 40 27.9093 0.00 -0.10 0.00 -0.21 41 27.9093 0.00 -0.10 0.00 -0.24 42 27.9093 0.00 -0.07 0.00 -0.19 43 27.9095 0.00 0.00 0.00 -0.21 44 27.9095 0.00 -0.12 0.00 -0.26 45 27.9115 0.00 0.02 0.00 -0.18 46 27.9115 0.00 -0.10 0.00 -0.24 47 27.9115 0.00 -0.07 0.00 -0.19 48 27.9116 0.00 -0.01 0.00 -0.19 49 27.9117 0.00 0.03 0.00 -0.25 50 27.9117 0.00 0.06 0.00 -0.20 51 27.9118 0.00 -0.09 0.00 -0.16 52 27.9118 0.00 -0.06 0.00 -0.22 53 27.9118 0.00 -0.02 0.00 -0.17 54 27.9120 0.00 -0.03 0.00 -0.26 55 27.9120 0.00 -0.05 0.00 -0.26 56 27.9120 0.00 -0.02 0.00 -0.22 57 27.9122 0.00 -0.11 0.00 -0.18 58 27.9122 0.00 -0.08 0.00 -0.24 59 27.9122 0.00 -0.04 0.00 -0.20 60 28.7065 0.00 0.26 0.00 -0.15 61 28.7065 0.00 0.30 0.00 -0.25 62 28.7093 0.00 -0.16 0.00 0.19 63 28.7093 0.00 -0.18 0.00 0.17 64 28.7121 0.00 -0.13 0.00 -0.22 65 28.7121 0.00 0.00 0.00 0.00 66 28.9299 0.00 0.08 0.00 -0.12 67 28.9303 0.00 0.09 0.00 -0.06 68 28.9308 0.00 0.06 0.00 -0.12 69 28.9328 0.00 0.09 0.00 -0.16 70 28.9331 0.00 -0.02 0.00 -0.08 71 28.9335 0.00 0.04 0.00 -0.08 72 29.0019 0.00 -0.03 0.00 -0.29 73 29.0019 0.00 -0.27 0.00 -0.14 74 29.0020 0.00 -0.06 0.00 -0.25 75 29.0020 0.00 -0.26 0.00 -0.14
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.
312645 quality flag:3 Type: 2:1E 2:1E 2:1E axisobj 47.344 47.344 47.344 ecceobj 0.302 0.302 0.302 incobj 18.930 18.930 18.930 qmin 30.971 32.481 32.337 qmax 65.705 64.255 64.573 amean 47.795 47.796 47.797 amin 47.112 47.073 47.042 amax 48.654 48.672 48.709 emean 0.322 0.305 0.307 emin 0.300 0.288 0.288 emax 0.353 0.323 0.326 imean 18.897 19.462 19.315 imin 17.520 19.020 18.922 imax 19.609 19.820 19.832 excite_mean 0.457 0.452 0.452 fracstop 1.000 1.000 1.000 cjmean 2.886 2.892 2.892 libcent 0 180.3 180.7 179.8 libamp 0 158.6 160.2 164.0 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 159.6 149.7 151.7 kozaiamp 180.0 180.0 180.0