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: 07NC7 # Created Thu May 24 01:37:35 2012 # Orbit generated from Bernstein formalism # Fitting 25 observations of 26 # Arc: 3.10y # First observation: 2007/07/11 # Last observation: 2010/08/17 Preliminary a, adot, b, bdot, g, gdot: 0.000626 0.074589 0.000081 0.008087 0.051673 0.000000 # Chi-squared of fit: 66.05 DOF: 44 RMS: 0.29 # Min/Max residuals: -0.87 0.69 # Exact a, adot, b, bdot, g, gdot: 2.460486E-05 7.904266E-02 2.056627E-06 8.655669E-03 5.144565E-02 2.969012E-02 # Covariance matrix: 2.4195E-13 -3.5462E-13 6.5065E-15 -3.9553E-14 3.0513E-13 -1.7000E-12 -3.5462E-13 1.2866E-12 -2.4406E-14 1.5227E-13 -3.5346E-13 6.5604E-12 6.5065E-15 -2.4406E-14 8.8734E-14 -4.3132E-14 7.7785E-15 -1.3041E-13 -3.9553E-14 1.5227E-13 -4.3132E-14 7.7143E-14 -4.5477E-14 8.1336E-13 3.0513E-13 -3.5346E-13 7.7785E-15 -4.5477E-14 7.3124E-13 -1.9471E-12 -1.7000E-12 6.5604E-12 -1.3041E-13 8.1336E-13 -1.9471E-12 3.5043E-11 # lat0 lon0 xBary yBary zBary JD0 -1.451261 -47.336567 0.410266 -0.023403 -0.925488 2454292.879484 # Heliocentric elements and errors Epoch: 2454290.5000 = 2007/07/09 Mean Anomaly: 19.25343 +/- 0.008 Argument of Peri: 287.10456 +/- 0.004 Long of Asc Node: 324.14424 +/- 0.000 Inclination: 6.30043 +/- 0.000 Eccentricity: 0.50791876 +/- 0.0001 Semi-Major Axis: 34.38733936 +/- 0.0088 Time of Perihelion: 2450351.3555 +/- 0.3 Perihelion: 16.92136471 +/- 0.0063 Aphelion: 51.85331402 +/- 0.0141 Period (y) 201.6536 +/- 0.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 13.49352314 +/- 0.0002 Ecliptic Y -15.25228118 +/- 0.0002 Ecliptic Z -0.49221287 +/- 0.0000 Ecliptic XDOT 0.00417784 +/- 0.0000 Ecliptic YDOT 0.00167838 +/- 0.0000 Ecliptic ZDOT 0.00042038 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 20.37030980 +/- 0.0002 Geocenter to KBO 19.43798847 +/- 0.0003 # Hcoef: 8.09
The following table shows the complete astrometric record for 07NC7. 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 (07NC7) followed by the observatory code and reference code for the source of the astrometry.
2007 07 11.37873 21 02 14.20 -18 23 59.6 21.4R 07NC7 675 Cv4527 2007 07 11.42218 21 02 13.83 -18 24 00.7 21.4R 07NC7 675 Cv4527 2007 07 12.31282 21 02 06.60 -18 24 27.6 21.8R 07NC7 675 Cv4527 2007 07 12.35789 21 02 06.23 -18 24 30.1 21.3R 07NC7 675 Cv4527 2007 07 24.28223 21 00 23.36 -18 30 58.2 07NC7 675 Cv4527 2007 07 24.33853 21 00 22.87 -18 30 59.8 07NC7 675 Cv4527 2007 07 24.41108 21 00 22.20 -18 31 02.0 07NC7 675 Cv4527 2007 08 07.24444 20 58 15.51 -18 38 43.2 07NC7 675 Cv4527 2007 08 07.29968 20 58 14.94 -18 38 44.2 07NC7 675 Cv4527 2007 08 07.37575 20 58 14.27 -18 38 46.9 07NC7 675 Cv4527 2007 08 20.20228 20 56 18.06 -18 45 30.0 21.0R 07NC7 675 Cz1397 2007 08 20.24391 20 56 17.71 -18 45 30.2 20.8R 07NC7 675 Cz1397 2007 08 21.19766 20 56 09.39 -18 45 58.6 20.9R 07NC7 675 Cz1397 2007 08 21.20312 20 56 09.34 -18 45 59.2 07NC7 675 Cv4527 2007 08 21.24138 20 56 08.99 -18 45 59.8 20.9R 07NC7 675 Cz1397 2007 08 21.25722 20 56 08.86 -18 46 00.7 07NC7 675 Cv4527 2007 08 21.31080 20 56 08.40 -18 46 02.2 07NC7 675 Cv4527 2008 06 07.41506 21 22 13.68 -16 26 24.3 07NC7 675 Cz1397 2008 06 09.41025 21 22 07.77 -16 26 47.3 07NC7 675 Cz1397 2008 07 26.27992 21 17 10.97 -16 47 04.7 07NC7 675 Cz2998 2008 07 26.44753 21 17 09.49 -16 47 10.8 07NC7 675 Cz2998 2009 07 27.28230 21 33 01.62 -15 03 13.9 21.5R 07NC7 688 C~07sE 2009 07 27.34166 21 33 01.13 -15 03 15.8 07NC7 688 C~07sE 2010 08 17.03007 21 45 03.845 -13 33 48.81 21.0 07NC7 809 C~0Mu9 2010 08 17.11749 21 45 03.113 -13 33 52.02 21.0 07NC7 809 C~0Mu9 2010 08 17.22705 21 45 02.153 -13 33 56.52 21.5 07NC7 809 C~0Mu9
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 -0.06 0.00 0.12 2 0.0001 -5.36 -0.14 0.44 0.40 3 0.0026 -111.67 ( 0.25) 3.87 ( 1.15) 4 0.0027 -117.43 0.03 2.97 0.09 5 0.0353 -1631.10 -0.08 44.60 -0.59 6 0.0355 -1638.24 0.33 45.03 -0.41 7 0.0357 -1648.00 0.30 45.61 -0.18 8 0.0736 -3506.67 0.15 107.64 -0.87 9 0.0737 -3514.73 -0.32 108.94 0.13 10 0.0739 -3524.63 0.22 109.00 -0.25 11 0.1090 -5223.52 -0.62 179.89 -0.23 12 0.1091 -5228.36 -0.04 181.08 0.69 13 0.1118 -5349.86 0.11 186.41 0.28 14 0.1118 -5350.71 -0.03 186.02 -0.14 15 0.1119 -5355.65 -0.03 186.82 0.41 16 0.1119 -5357.68 -0.01 186.46 -0.05 17 0.1121 -5364.37 0.23 186.83 -0.05 18 0.9091 18536.11 0.21 1646.02 0.17 19 0.9145 18447.43 -0.36 1650.41 0.36 20 1.0429 13985.76 0.22 1795.60 0.15 21 1.0433 13963.56 -0.02 1796.22 -0.05 22 2.0449 29129.97 -0.17 3454.43 0.20 23 2.0451 29122.49 -0.06 3454.91 0.40 24 3.1010 41151.82 0.10 5134.82 -0.23 25 3.1013 41140.25 0.27 5135.33 -0.11 26 3.1016 41124.96 -0.23 5135.72 -0.26
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.
07NC7 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 33.953 33.982 33.924 ecceobj 0.502 0.502 0.501 incobj 6.306 6.306 6.306 qmin 16.653 16.738 16.785 qmax 52.590 60.035 51.479 amean 33.846 36.617 33.545 amin 33.052 33.489 33.092 amax 34.711 38.541 34.214 emean 0.505 0.536 0.496 emin 0.495 0.498 0.487 emax 0.515 0.558 0.505 imean 7.470 6.398 7.560 imin 7.172 5.551 7.412 imax 7.632 7.632 7.632 excite_mean 0.521 0.548 0.513 fracstop 0.002 0.015 0.002 cjmean 2.703 2.672 2.713 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 293.4 165.8 292.9 kozaiamp 6.4 179.4 5.4