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: 02PC171 # Created Wed Dec 25 02:08:20 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 22 observations of 22 # Arc: 13.26y # First observation: 2002/08/05 # Last observation: 2015/11/08 # Chi-squared of fit: 74.79 DOF: 38 RMS: 0.33 # Min/Max residuals: -0.76 0.65 # Exact a, adot, b, bdot, g, gdot: 1.458539E-05 2.347265E-02 -5.366539E-07 1.456287E-03 2.395201E-02 1.080388E-03 # Covariance matrix: 2.7263E-13 -2.5227E-14 1.2142E-15 -2.3192E-15 2.8315E-13 -1.2738E-13 -2.5227E-14 1.5258E-13 -6.4030E-15 9.6068E-15 1.3977E-13 4.8421E-13 1.2142E-15 -6.4030E-15 8.6253E-14 -9.9848E-15 -5.1956E-15 -2.1206E-14 -2.3192E-15 9.6068E-15 -9.9848E-15 5.4740E-15 6.9937E-15 3.2021E-14 2.8315E-13 1.3977E-13 -5.1956E-15 6.9937E-15 6.1216E-13 3.3561E-13 -1.2738E-13 4.8421E-13 -2.1206E-14 3.2021E-14 3.3561E-13 1.6183E-12 # lat0 lon0 xBary yBary zBary JD0 -0.483979 -30.465783 0.295895 -0.008293 -0.974513 2452491.963623 # Heliocentric elements and errors Epoch: 2452492.5000 = 2002/08/06 Mean Anomaly: 40.36535 +/- 0.066 Argument of Peri: 307.75169 +/- 0.076 Long of Asc Node: 336.70799 +/- 0.000 Inclination: 3.58841 +/- 0.000 Eccentricity: 0.05504115 +/- 0.0001 Semi-Major Axis: 44.52999099 +/- 0.0056 Time of Perihelion: 2440322.6952 +/- 20.2 Perihelion: 42.07900897 +/- 0.0063 Aphelion: 46.98097302 +/- 0.0068 Period (y) 297.1578 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 36.67453331 +/- 0.0012 Ecliptic Y -21.91092267 +/- 0.0007 Ecliptic Z -0.35265644 +/- 0.0000 Ecliptic XDOT 0.00146025 +/- 0.0000 Ecliptic YDOT 0.00224671 +/- 0.0000 Ecliptic ZDOT 0.00016562 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.72273681 +/- 0.0011 Geocenter to KBO 41.75014595 +/- 0.0014 # Hcoef: 7.65
The following table shows the complete astrometric record for 02PC171. 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 (02PC171) followed by the observatory code and reference code for the source of the astrometry.
2002 08 05.46288 22 07 16.20 -12 05 19.2 23.5R 02PC171 568 Cp2010 2002 08 05.52504 22 07 15.93 -12 05 20.7 23.5R 02PC171 568 Cp2010 2002 08 05.59101 22 07 15.63 -12 05 22.2 23.4R 02PC171 568 Cp2010 2002 08 09.44654 22 06 58.82 -12 06 52.2 02PC171 568 Cp2010 2002 09 04.25628 22 05 02.61 -12 17 05.0 02PC171 309 Cp2010 2002 09 04.26240 22 05 02.59 -12 17 05.1 02PC171 309 Cp2010 2002 09 04.30259 22 05 02.40 -12 17 06.0 02PC171 309 Cp2010 2002 09 04.30893 22 05 02.37 -12 17 06.2 02PC171 309 Cp2010 2002 09 30.28467 22 03 19.08 -12 25 56.4 02PC171 568 Cp2010 2002 09 30.33935 22 03 18.89 -12 25 57.3 02PC171 568 Cp2010 2002 09 30.40147 22 03 18.64 -12 25 58.7 02PC171 568 Cp2010 2003 10 28.08099 22 07 10.34 -11 58 58.6 02PC171 309 Cp2010 2003 10 28.14869 22 07 10.24 -11 58 58.9 02PC171 309 Cp2010 2003 10 29.05427 22 07 08.96 -11 59 05.5 02PC171 309 Cp2010 2003 10 29.13192 22 07 08.88 -11 59 06.0 02PC171 309 Cp2010 2004 09 11.22046 22 14 30.29 -11 13 53.6 02PC171 695 Cp2010 2004 09 11.28003 22 14 30.04 -11 13 55.1 02PC171 695 Cp2010 2004 09 13.19258 22 14 21.91 -11 14 38.7 24.0r 02PC171 695 Cp2010 2004 09 13.25263 22 14 21.65 -11 14 40.0 24.0r 02PC171 695 Cp2010 2004 09 13.31249 22 14 21.43 -11 14 41.4 23.8r 02PC171 695 Cp2010 2015 11 08.08221 23 04 34.30 -05 16 18.4 23.9R 02PC171 G37 C~1dc5 2015 11 08.18608 23 04 34.02 -05 16 19.0 02PC171 G37 C~1dc5
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 0.07 0.00 0.36
2 0.0002 0.00 0.12 0.00 0.28
3 0.0004 0.00 -0.04 0.00 0.29
4 0.0109 0.00 -0.14 0.00 -0.09
5 0.0816 0.00 -0.12 0.00 -0.21
6 0.0816 0.00 -0.01 0.00 -0.17
7 0.0817 0.00 -0.16 0.00 -0.15
8 0.0817 0.00 -0.18 0.00 -0.21
9 0.1528 0.00 0.14 0.00 0.63
10 0.1530 0.00 0.12 0.00 0.65
11 0.1532 0.00 -0.42 0.00 0.30
12 1.2282 0.00 0.23 0.00 0.13
13 1.2284 0.00 0.25 0.00 0.25
14 1.2309 0.00 -0.23 0.00 -0.72
15 1.2311 0.00 0.21 0.00 -0.76
16 2.1020 0.00 0.06 0.00 -0.02
17 2.1022 0.00 0.20 0.00 -0.16
18 2.1074 0.00 -0.10 0.00 -0.21
19 2.1076 0.00 -0.14 0.00 -0.15
20 2.1077 0.00 0.41 0.00 -0.20
21 13.2584 0.00 0.65 0.00 -0.15
22 13.2587 0.00 -0.74 0.00 0.37
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.
02PC171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.880 44.880 44.880 ecceobj 0.060 0.060 0.060 incobj 3.573 3.573 3.573 qmin 41.563 41.562 41.502 qmax 48.191 48.166 48.223 amean 44.763 44.763 44.763 amin 44.404 44.404 44.407 amax 45.129 45.124 45.127 emean 0.055 0.055 0.055 emin 0.041 0.041 0.041 emax 0.068 0.068 0.069 imean 4.636 4.636 4.636 imin 4.077 4.077 4.077 imax 5.068 5.069 5.068 excite_mean 0.098 0.098 0.098 fracstop 1.000 1.000 1.000 cjmean 3.099 3.099 3.099 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 175.3 175.2 175.3 kozaiamp 180.0 179.9 180.0