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: 208996 # Created Tue May 21 01:36:47 2013 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 92 observations of 92 # Arc: 15.87y # First observation: 1996/03/19 # Last observation: 2012/01/31 # Chi-squared of fit: 376.06 DOF: 178 RMS: 0.36 # Min/Max residuals: -1.76 1.26 # Exact a, adot, b, bdot, g, gdot: 1.353996E-05 1.780869E-02 -2.083463E-06 -3.821229E-03 2.170633E-02 -1.303394E-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 -6.484575 98.782643 -0.983963 -0.020294 -0.177713 2450161.663910 # Heliocentric elements and errors Epoch: 2450162.5000 = 1996/03/20 Mean Anomaly: 198.56202 +/- 0.000 Argument of Peri: 15.49221 +/- 0.000 Long of Asc Node: 252.10882 +/- 0.000 Inclination: 13.60236 +/- 0.000 Eccentricity: 0.18311554 +/- 0.0000 Semi-Major Axis: 39.31915187 +/- 0.0000 Time of Perihelion: 2490546.3634 +/- 0.0 Perihelion: 32.11920422 +/- 0.0000 Aphelion: 46.51909951 +/- 0.0000 Period (y) 246.5553 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -7.98535388 +/- 0.0000 Ecliptic Y 45.25723963 +/- 0.0000 Ecliptic Z -5.20298270 +/- 0.0000 Ecliptic XDOT -0.00217932 +/- 0.0000 Ecliptic YDOT -0.00055569 +/- 0.0000 Ecliptic ZDOT -0.00046052 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.24994578 +/- 0.0000 Geocenter to KBO 46.06960475 +/- 0.0000 # Hcoef: 3.68
The following table shows the complete astrometric record for 208996. 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 (208996) followed by the observatory code and reference code for the source of the astrometry.
1996 03 19.16319 06 36 26.97 +16 40 38.4 208996 261 x1751 2001 12 16.35892 07 07 14.79 +14 39 55.5 20.1R 208996 644 Ch6172 2001 12 16.37992 07 07 14.66 +14 39 56.0 20.1R 208996 644 Ch6172 2001 12 16.40222 07 07 14.59 +14 39 56.2 19.8R 208996 644 Ch6172 2001 12 28.32427 07 06 19.85 +14 40 27.1 19.7R 208996 644 Cp5837 2002 02 06.10881 07 03 18.42 +14 45 21.8 20.1R 208996 644 Ch6172 2002 02 06.13019 07 03 18.27 +14 45 22.0 20.1R 208996 644 Ch6172 2002 02 06.15300 07 03 18.21 +14 45 22.5 19.8R 208996 644 Ch6172 2003 01 13.27563 07 09 20.30 +14 22 04.4 20.2R 208996 644 Ch1861 2003 01 13.34172 07 09 19.98 +14 22 04.8 20.2R 208996 644 Ch1861 2003 01 13.40470 07 09 19.68 +14 22 05.2 20.2R 208996 644 Ch1861 2003 01 26.22365 07 08 20.39 +14 23 52.3 20.2R 208996 675 Ch1861 2003 01 26.26909 07 08 20.17 +14 23 52.6 208996 675 Ch1861 2003 01 26.45326 07 08 19.38 +14 23 54.5 208996 675 Ch1861 2003 03 06.16884 07 06 06.84 +14 30 44.9 19.5R 208996 662 Ch6172 2003 03 06.25617 07 06 06.65 +14 30 45.6 208996 662 Ch6172 2003 03 23.12509 07 05 43.90 +14 33 37.5 20.5R 208996 673 Ch6172 2003 03 23.13495 07 05 43.89 +14 33 37.5 208996 673 Ch6172 2003 03 23.21667 07 05 43.82 +14 33 38.3 208996 673 Ch6172 2003 03 23.22384 07 05 43.80 +14 33 38.4 208996 673 Ch6172 2003 03 24.18704 07 05 43.30 +14 33 47.2 20.5R 208996 673 Ch6172 2003 03 24.21424 07 05 43.28 +14 33 47.6 208996 673 Ch6172 2003 03 25.12778 07 05 42.85 +14 33 56.4 21.0R 208996 673 Ch6172 2003 03 25.14039 07 05 42.86 +14 33 56.4 208996 673 Ch6172 2003 03 25.15278 07 05 42.84 +14 33 56.6 208996 673 Ch6172 2003 04 01.21262 07 05 42.09 +14 34 58.8 19.9R 208996 675 Ch6172 2003 04 02.15123 07 05 42.33 +14 35 06.4 19.9R 208996 675 Ch6172 2003 10 28.19289 07 18 04.97 +14 03 37.4 20.3R 208996 621 Cj0464 2003 11 05.19272 07 17 55.05 +14 02 16.7 208996 621 Cj0464 2003 11 06.18870 07 17 53.43 +14 02 07.9 208996 621 Cj0464 2004 12 11.02096 07 20 20.43 +13 38 53.7 208996 621 Cm2693 2004 12 11.05604 07 20 20.28 +13 38 53.6 20. R 208996 621 Cm2693 2004 12 11.37681 07 20 18.96 +13 38 54.3 20.0R 208996 290 Cm4079 2004 12 11.42451 07 20 18.77 +13 38 54.4 20.1R 208996 290 Cm4079 2004 12 17.92615 07 19 51.19 +13 39 02.7 19.7R 208996 J86 Cz6609 2004 12 17.92969 07 19 51.16 +13 39 02.9 19.4R 208996 J86 Cz6609 2004 12 17.93323 07 19 51.16 +13 39 02.9 19.9R 208996 J86 Cz6609 2004 12 17.98907 07 19 50.91 +13 39 02.9 19.9R 208996 J86 Cz6609 2004 12 17.99263 07 19 50.87 +13 39 02.7 20.1R 208996 J86 Cz6609 2004 12 17.99617 07 19 50.87 +13 39 02.9 19.4R 208996 J86 Cz6609 2004 12 17.99971 07 19 50.86 +13 39 02.9 19.9R 208996 J86 Cz6609 2004 12 18.00325 07 19 50.84 +13 39 02.9 20.1R 208996 J86 Cz6609 2004 12 18.06050 07 19 50.58 +13 39 03.0 19.8R 208996 J86 Cz6609 2004 12 18.06943 07 19 50.55 +13 39 03.1 19.9R 208996 J86 Cz6609 2004 12 19.17120 07 19 45.71 +13 39 05.8 19.7R 208996 J86 Cz6609 2004 12 19.17590 07 19 45.68 +13 39 05.2 19.9R 208996 J86 Cz6609 2004 12 19.18050 07 19 45.67 +13 39 05.7 19.7R 208996 J86 Cz6609 2004 12 19.18404 07 19 45.66 +13 39 05.1 19.6R 208996 J86 Cz6609 2004 12 20.08409 07 19 41.66 +13 39 08.0 19.9R 208996 J86 Cz6609 2004 12 20.08764 07 19 41.64 +13 39 07.9 19.9R 208996 J86 Cz6609 2004 12 20.09118 07 19 41.64 +13 39 08.1 19.3R 208996 J86 Cz6609 2004 12 20.09472 07 19 41.62 +13 39 08.1 19.9R 208996 J86 Cz6609 2004 12 20.09826 07 19 41.59 +13 39 08.1 20.0R 208996 J86 Cz6609 2004 12 20.15610 07 19 41.33 +13 39 08.2 19.9R 208996 J86 Cz6609 2004 12 20.15964 07 19 41.30 +13 39 08.0 19.9R 208996 J86 Cz6609 2004 12 20.16318 07 19 41.30 +13 39 08.3 19.8R 208996 J86 Cz6609 2004 12 20.16672 07 19 41.28 +13 39 08.3 19.8R 208996 J86 Cz6609 2006 02 25.14819 07 19 08.05 +13 28 30.7 20.1R 208996 688 Cq6038 2006 02 25.22325 07 19 07.83 +13 28 31.7 208996 688 Cq6038 2008 12 20.09395 07 36 37.48 +12 13 18.8 20.1V 208996 A55 C~02Oh 2008 12 21.06016 07 36 33.26 +12 13 22.8 20.4V 208996 A55 C~02Oh 2009 02 18.79080 07 32 07.23 +12 23 25.3 19.6C 208996 B42 C~04Z4 2009 02 18.80614 07 32 07.18 +12 23 25.7 19.4C 208996 B42 C~04Z4 2009 02 18.89602 07 32 06.89 +12 23 27.8 20.2R 208996 130 C~04Z4 2010 11 08.34906 07 47 08.348 +11 31 24.57 208996 309 C~0X4z 2010 11 08.34972 07 47 08.348 +11 31 24.58 208996 309 C~0X4z 2010 11 08.35039 07 47 08.349 +11 31 24.55 208996 309 C~0X4z 2010 11 08.35138 07 47 08.347 +11 31 24.52 208996 309 C~0X4z 2010 11 08.35204 07 47 08.351 +11 31 24.46 208996 309 C~0X4z 2010 11 08.35272 07 47 08.347 +11 31 24.48 208996 309 C~0X4z 2010 11 08.35400 07 47 08.347 +11 31 24.47 208996 309 C~0X4z 2010 11 08.35509 07 47 08.348 +11 31 24.48 208996 309 C~0X4z 2010 11 08.35619 07 47 08.342 +11 31 24.48 208996 309 C~0X4z 2010 11 08.35729 07 47 08.337 +11 31 24.45 208996 309 C~0X4z 2010 11 08.35796 07 47 08.339 +11 31 24.45 208996 309 C~0X4z 2010 11 08.35865 07 47 08.338 +11 31 24.43 208996 309 C~0X4z 2010 11 08.35978 07 47 08.335 +11 31 24.44 208996 309 C~0X4z 2010 11 08.36091 07 47 08.334 +11 31 24.45 208996 309 C~0X4z 2010 11 08.36206 07 47 08.334 +11 31 24.38 208996 309 C~0X4z 2011 01 05.33251 07 43 55.61 +11 29 59.6 20.2 208996 I40 C~0UoJ 2011 01 05.33412 07 43 55.62 +11 29 59.5 20.2V 208996 I40 C~0UoJ 2011 01 05.33568 07 43 55.60 +11 29 59.4 19.9R 208996 I40 C~0UoJ 2011 01 05.33791 07 43 55.49 +11 30 00.0 19.0I 208996 I40 C~0UoJ 2012 01 14.15166 07 47 31.05 +11 08 26.5 19.4R 208996 735 C~0dMu 2012 01 14.16516 07 47 30.93 +11 08 25.9 20.2R 208996 735 C~0dMu 2012 01 14.18105 07 47 30.91 +11 08 25.1 20.3R 208996 735 C~0dMu 2012 01 15.24009 07 47 25.88 +11 08 37.5 20.3R 208996 735 C~0dMu 2012 01 15.25347 07 47 25.81 +11 08 37.6 19.8R 208996 735 C~0dMu 2012 01 15.26743 07 47 25.72 +11 08 37.9 19.9R 208996 735 C~0dMu 2012 01 31.89222 07 46 07.94 +11 12 01.8 20.9R 208996 561 C~0e3O 2012 01 31.89419 07 46 07.93 +11 12 01.3 20.7R 208996 561 C~0e3O 2012 01 31.89999 07 46 07.92 +11 12 01.4 20.0R 208996 561 C~0e3O
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 -0.19 0.00 0.58 2 5.7445 0.00 -0.05 0.00 0.62 3 5.7446 0.00 -0.58 0.00 1.09 4 5.7447 0.00 -0.13 0.00 1.26 5 5.7773 0.00 0.87 0.00 -0.55 6 5.8862 0.00 0.46 0.00 -0.36 7 5.8863 0.00 -0.51 0.00 -0.38 8 5.8864 0.00 -0.04 0.00 -0.11 9 6.8203 0.00 -0.09 0.00 0.17 10 6.8205 0.00 -0.11 0.00 0.09 11 6.8206 0.00 -0.06 0.00 0.03 12 6.8557 0.00 0.17 0.00 -0.10 13 6.8559 0.00 -0.04 0.00 -0.23 14 6.8564 0.00 0.57 0.00 -0.01 15 6.9624 0.00 -0.20 0.00 0.58 16 6.9626 0.00 -0.25 0.00 0.34 17 7.0088 0.00 0.16 0.00 -0.22 18 7.0088 0.00 0.11 0.00 -0.31 19 7.0090 0.00 -0.12 0.00 -0.28 20 7.0091 0.00 -0.35 0.00 -0.24 21 7.0117 0.00 0.16 0.00 -0.51 22 7.0118 0.00 0.09 0.00 -0.36 23 7.0143 0.00 0.00 0.00 -0.06 24 7.0143 0.00 0.24 0.00 -0.17 25 7.0143 0.00 0.03 0.00 -0.09 26 7.0337 0.00 -0.03 0.00 -0.01 27 7.0362 0.00 -0.15 0.00 -0.18 28 7.6086 0.00 0.08 0.00 -0.02 29 7.6305 0.00 0.38 0.00 -0.46 30 7.6332 0.00 0.46 0.00 -0.30 31 8.7306 0.00 0.48 0.00 -0.30 32 8.7307 0.00 0.40 0.00 -0.42 33 8.7316 0.00 0.26 0.00 0.11 34 8.7317 0.00 0.39 0.00 0.19 35 8.7495 0.00 0.09 0.00 0.04 36 8.7495 0.00 -0.13 0.00 0.23 37 8.7495 0.00 0.11 0.00 0.22 38 8.7497 0.00 0.07 0.00 0.09 39 8.7497 0.00 -0.30 0.00 -0.12 40 8.7497 0.00 -0.06 0.00 0.07 41 8.7497 0.00 0.02 0.00 0.07 42 8.7497 0.00 -0.04 0.00 0.06 43 8.7499 0.00 -0.13 0.00 0.03 44 8.7499 0.00 0.02 0.00 0.11 45 8.7529 0.00 0.20 0.00 0.24 46 8.7529 0.00 0.07 0.00 -0.38 47 8.7530 0.00 0.22 0.00 0.11 48 8.7530 0.00 0.31 0.00 -0.49 49 8.7554 0.00 0.08 0.00 0.05 50 8.7554 0.00 0.02 0.00 -0.06 51 8.7554 0.00 0.26 0.00 0.13 52 8.7555 0.00 0.20 0.00 0.12 53 8.7555 0.00 -0.01 0.00 0.11 54 8.7556 0.00 0.00 0.00 0.06 55 8.7556 0.00 -0.21 0.00 -0.15 56 8.7556 0.00 0.03 0.00 0.14 57 8.7557 0.00 -0.03 0.00 0.13 58 9.9384 0.00 -0.37 0.00 0.15 59 9.9386 0.00 -0.24 0.00 0.20 60 12.7555 0.00 -0.59 0.00 -1.03 61 12.7581 0.00 -1.45 0.00 -0.05 62 12.9216 0.00 0.24 0.00 -0.25 63 12.9217 0.00 0.33 0.00 -0.07 64 12.9219 0.00 0.81 0.00 0.72 65 14.6398 0.00 0.03 0.00 0.15 66 14.6398 0.00 0.04 0.00 0.17 67 14.6398 0.00 0.07 0.00 0.15 68 14.6398 0.00 0.06 0.00 0.13 69 14.6398 0.00 0.13 0.00 0.07 70 14.6398 0.00 0.09 0.00 0.10 71 14.6398 0.00 0.11 0.00 0.10 72 14.6398 0.00 0.15 0.00 0.13 73 14.6398 0.00 0.08 0.00 0.14 74 14.6398 0.00 0.03 0.00 0.12 75 14.6398 0.00 0.07 0.00 0.13 76 14.6398 0.00 0.07 0.00 0.12 77 14.6398 0.00 0.05 0.00 0.14 78 14.6398 0.00 0.06 0.00 0.16 79 14.6398 0.00 0.08 0.00 0.10 80 14.7985 0.00 -0.34 0.00 -0.07 81 14.7986 0.00 -0.08 0.00 -0.19 82 14.7986 0.00 -0.27 0.00 -0.30 83 14.7986 0.00 -1.76 0.00 0.28 84 15.8220 0.00 0.39 0.00 0.48 85 15.8220 0.00 -0.44 0.00 -0.26 86 15.8221 0.00 0.41 0.00 -1.23 87 15.8250 0.00 0.45 0.00 0.24 88 15.8250 0.00 0.36 0.00 0.20 89 15.8251 0.00 0.02 0.00 0.35 90 15.8706 0.00 0.36 0.00 0.08 91 15.8706 0.00 0.34 0.00 -0.44 92 15.8706 0.00 0.59 0.00 -0.42
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.
208996 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.577 39.577 39.577 ecceobj 0.175 0.175 0.175 incobj 13.528 13.528 13.528 qmin 31.662 31.661 31.662 qmax 47.807 47.807 47.806 amean 39.456 39.456 39.456 amin 39.074 39.074 39.074 amax 39.907 39.907 39.907 emean 0.169 0.169 0.169 emin 0.139 0.139 0.139 emax 0.198 0.198 0.198 imean 15.564 15.564 15.563 imin 14.807 14.807 14.807 imax 16.431 16.432 16.431 excite_mean 0.317 0.317 0.317 fracstop 1.000 1.000 1.000 cjmean 2.936 2.936 2.936 libcent 0 179.4 179.4 179.3 libamp 0 60.0 60.0 60.0 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 187.0 186.9 187.0 kozaiamp 180.0 180.0 180.0