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: 02PU170 # Created Fri May 2 02:36:50 2008 # Orbit generated from Bernstein formalism # Fitting 22 observations of 22 # Arc: 3.98y # First observation: 2002/08/05 # Last observation: 2006/07/30 Preliminary a, adot, b, bdot, g, gdot: -0.000084 0.019782 -0.000007 0.000661 0.021688 0.000000 # Chi-squared of fit: 56.17 DOF: 38 RMS: 0.28 # Min/Max residuals: -0.65 0.52 # Exact a, adot, b, bdot, g, gdot: 1.169684E-05 1.944908E-02 -1.852833E-06 6.494599E-04 2.164474E-02 -4.330394E-03 # Covariance matrix: 2.4576E-13 -1.0856E-13 2.4792E-16 -9.8740E-16 1.9908E-13 -3.9780E-13 -1.0856E-13 3.3708E-13 -2.8557E-15 1.0265E-14 8.3071E-14 4.1347E-12 2.4792E-16 -2.8557E-15 1.3392E-13 -4.3381E-14 -1.5493E-15 -3.9870E-14 -9.8740E-16 1.0265E-14 -4.3381E-14 2.7980E-14 5.3567E-15 1.4285E-13 1.9908E-13 8.3071E-14 -1.5493E-15 5.3567E-15 5.0057E-13 2.1574E-12 -3.9780E-13 4.1347E-12 -3.9870E-14 1.4285E-13 2.1574E-12 5.7538E-11 # lat0 lon0 xBary yBary zBary JD0 -0.078210 -32.893771 0.255009 -0.001410 -0.986045 2452491.923773 # Heliocentric elements and errors Epoch: 2452490.5000 = 2002/08/04 Mean Anomaly: 285.38927 +/- 0.046 Argument of Peri: 98.26731 +/- 0.028 Long of Asc Node: 329.08230 +/- 0.000 Inclination: 1.92604 +/- 0.000 Eccentricity: 0.22506607 +/- 0.0004 Semi-Major Axis: 47.65404637 +/- 0.0102 Time of Perihelion: 2477393.2266 +/- 13.0 Perihelion: 36.92873759 +/- 0.0195 Aphelion: 58.37935516 +/- 0.0218 Period (y) 328.9712 +/- 0.11 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 39.48314816 +/- 0.0013 Ecliptic Y -25.83465244 +/- 0.0008 Ecliptic Z -0.06312132 +/- 0.0000 Ecliptic XDOT 0.00086843 +/- 0.0000 Ecliptic YDOT 0.00236055 +/- 0.0000 Ecliptic ZDOT 0.00008311 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 47.18423720 +/- 0.0011 Geocenter to KBO 46.20059968 +/- 0.0015 # Hcoef: 7.07
The following table shows the complete astrometric record for 02PU170. 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 (02PU170) followed by the observatory code and reference code for the source of the astrometry.
2002 08 05.42303 21 57 22.16 -12 32 57.2 23.2R 02PU170 568 Cp2009 2002 08 05.48562 21 57 21.90 -12 32 58.5 23.7R 02PU170 568 Cp2009 2002 08 05.54820 21 57 21.63 -12 33 00.1 23.5R 02PU170 568 Cp2009 2002 08 08.44795 21 57 09.87 -12 34 02.1 02PU170 568 Cp2009 2002 09 03.97196 21 55 20.10 -12 43 35.3 02PU170 950 Cp2009 2002 09 04.01127 21 55 19.97 -12 43 36.1 02PU170 950 Cp2009 2002 09 04.05201 21 55 19.78 -12 43 36.7 23.4R 02PU170 950 Cp2009 2002 09 30.24743 21 53 46.07 -12 51 39.9 23.4R 02PU170 568 Cp2009 2002 09 30.30449 21 53 45.90 -12 51 40.9 23.2R 02PU170 568 Cp2009 2002 09 30.36635 21 53 45.71 -12 51 41.8 23.3R 02PU170 568 Cp2009 2003 10 29.04176 21 56 58.52 -12 32 04.9 02PU170 309 Cp2009 2003 10 29.11922 21 56 58.44 -12 32 05.3 02PU170 309 Cp2009 2004 08 12.39657 22 05 21.84 -11 44 54.9 23.7R 02PU170 568 Cp2009 2004 08 12.42677 22 05 21.71 -11 44 55.8 24.0R 02PU170 568 Cp2009 2004 08 12.46130 22 05 21.57 -11 44 56.4 23.7R 02PU170 568 Cp2009 2005 07 08.52640 22 11 44.19 -11 07 31.2 23.4r 02PU170 568 Cp2009 2005 07 08.56812 22 11 44.08 -11 07 31.8 23.6r 02PU170 568 Cp2009 2005 07 09.54830 22 11 41.35 -11 07 46.5 23.5r 02PU170 568 Cp2009 2006 07 30.43492 22 14 51.514 -10 47 25.80 23.0R 02PU170 500 2006 07 30.43931 22 14 51.494 -10 47 25.90 02PU170 500 2006 07 30.44371 22 14 51.477 -10 47 25.99 02PU170 500 2006 07 30.44811 22 14 51.461 -10 47 26.08 02PU170 500
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 0.52 0.00 0.48 2 0.0002 -4.02 0.48 0.08 0.52 3 0.0003 -8.28 0.20 -0.07 0.32 4 0.0083 -191.28 -0.02 0.57 -0.01 5 0.0809 -1897.10 -0.46 9.90 -0.52 6 0.0810 -1899.17 -0.02 9.80 -0.65 7 0.0811 -1901.98 -0.25 10.18 -0.30 8 0.1528 -3355.61 -0.22 21.27 -0.01 9 0.1530 -3358.29 -0.20 21.17 -0.15 10 0.1532 -3361.21 -0.20 21.26 -0.11 11 1.2310 -307.38 0.29 167.53 0.09 12 1.2312 -308.62 0.40 167.55 0.05 13 2.0205 7600.14 -0.09 273.34 0.07 14 2.0205 7598.03 -0.21 273.16 -0.13 15 2.0206 7595.89 -0.08 273.32 0.00 16 2.9243 13667.97 -0.24 397.23 0.39 17 2.9244 13666.24 -0.12 397.24 0.37 18 2.9271 13623.27 -0.16 397.72 0.46 19 3.9836 16691.26 0.14 544.00 -0.22 20 3.9836 16690.95 0.09 544.01 -0.21 21 3.9836 16690.68 0.08 544.02 -0.21 22 3.9836 16690.43 0.09 544.02 -0.21
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.
02PU170 quality flag:3 Type: 2:1E 2:1E 2:1E axisobj 48.004 48.004 48.004 ecceobj 0.224 0.224 0.224 incobj 1.917 1.917 1.917 qmin 36.553 36.597 36.597 qmax 59.955 59.967 59.888 amean 47.797 47.798 47.797 amin 47.135 47.137 47.137 amax 48.558 48.550 48.529 emean 0.218 0.218 0.218 emin 0.201 0.201 0.201 emax 0.236 0.235 0.235 imean 3.119 3.118 3.121 imin 2.717 2.717 2.717 imax 3.543 3.542 3.548 fracstop 1.000 1.000 1.000 cjmean 3.085 3.085 3.085 libcent 0 180.0 180.2 179.8 libamp 0 152.5 151.8 152.2 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 162.1 161.9 162.2 kozaiamp 180.0 180.0 180.0