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: 02PR170 # Created Sat Apr 20 01:10:50 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 27 observations of 27 # Arc: 15.12y # First observation: 2002/08/05 # Last observation: 2017/09/17 # Chi-squared of fit: 62.74 DOF: 48 RMS: 0.27 # Min/Max residuals: -0.52 0.77 # Exact a, adot, b, bdot, g, gdot: 1.238493E-05 2.070156E-02 2.379307E-06 1.696461E-04 2.254934E-02 1.837745E-03 # Covariance matrix: 1.8733E-13 -1.2730E-13 8.9485E-17 -1.0499E-15 1.0380E-13 -4.0334E-13 -1.2730E-13 1.8215E-13 -6.3814E-16 1.5683E-15 -4.7598E-14 5.9217E-13 8.9485E-17 -6.3814E-16 7.8237E-14 -5.9778E-15 -7.1702E-16 -2.0290E-15 -1.0499E-15 1.5683E-15 -5.9778E-15 1.6878E-15 -4.0218E-16 5.1450E-15 1.0380E-13 -4.7598E-14 -7.1702E-16 -4.0218E-16 1.9979E-13 -1.6989E-13 -4.0334E-13 5.9217E-13 -2.0290E-15 5.1450E-15 -1.6989E-13 1.9440E-12 # lat0 lon0 xBary yBary zBary JD0 -0.735764 -33.754021 0.240413 -0.012774 -0.989625 2452491.909723 # Heliocentric elements and errors Epoch: 2452492.5000 = 2002/08/06 Mean Anomaly: 105.39410 +/- 0.074 Argument of Peri: 188.41223 +/- 0.062 Long of Asc Node: 22.86964 +/- 0.006 Inclination: 0.85874 +/- 0.000 Eccentricity: 0.08671043 +/- 0.0000 Semi-Major Axis: 44.02498601 +/- 0.0044 Time of Perihelion: 2421256.0935 +/- 22.3 Perihelion: 40.20756050 +/- 0.0044 Aphelion: 47.84241152 +/- 0.0051 Period (y) 292.1171 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 37.55793348 +/- 0.0007 Ecliptic Y -25.38261250 +/- 0.0005 Ecliptic Z -0.56933395 +/- 0.0000 Ecliptic XDOT 0.00157452 +/- 0.0000 Ecliptic YDOT 0.00196311 +/- 0.0000 Ecliptic ZDOT 0.00001794 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.33425611 +/- 0.0007 Geocenter to KBO 44.34717624 +/- 0.0009 # Hcoef: 6.97
The following table shows the complete astrometric record for 02PR170. 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 (02PR170) followed by the observatory code and reference code for the source of the astrometry.
2002 08 05.40898 21 54 58.23 -13 27 38.8 24.0R 02PR170 568 Cp2009 2002 08 05.46821 21 54 57.97 -13 27 40.0 23.6R 02PR170 568 Cp2009 2002 08 05.53088 21 54 57.72 -13 27 41.2 23.9R 02PR170 568 Cp2009 2002 08 08.38708 21 54 45.60 -13 28 45.8 02PR170 568 Cp2009 2002 09 04.14068 21 52 50.47 -13 38 45.0 02PR170 309 Cp2009 2002 09 04.14680 21 52 50.45 -13 38 45.3 02PR170 309 Cp2009 2002 09 04.18376 21 52 50.29 -13 38 46.1 02PR170 309 Cp2009 2002 09 04.18988 21 52 50.26 -13 38 46.2 02PR170 309 Cp2009 2002 11 07.040664 21 50 10.35 -13 51 45.6 23.5r 02PR170 309 C~5i0z 2002 11 09.021200 21 50 10.21 -13 51 44.1 23.4r 02PR170 309 C~5i0z 2002 11 28.197863 21 50 26.80 -13 49 55.9 23.3r 02PR170 568 C~5i0z 2002 11 29.192179 21 50 28.53 -13 49 45.8 02PR170 568 C~5i0z 2002 11 29.201388 21 50 28.55 -13 49 45.8 23.5r 02PR170 568 C~5i0z 2002 11 30.199870 21 50 30.39 -13 49 35.5 02PR170 568 C~5i0z 2003 06 22.505188 22 01 53.17 -12 49 44.5 23.0i 02PR170 568 C~5i0z 2003 06 23.495701 22 01 51.23 -12 49 55.6 22.8i 02PR170 568 C~5i0z 2003 06 23.547142 22 01 51.11 -12 49 56.2 02PR170 568 C~5i0z 2003 06 23.595973 22 01 51.02 -12 49 56.7 02PR170 568 C~5i0z 2004 08 22.362907 22 02 47.60 -12 44 33.3 23.2r 02PR170 568 C~5i0z 2004 08 22.364901 22 02 47.59 -12 44 33.4 02PR170 568 C~5i0z 2004 08 22.366898 22 02 47.59 -12 44 33.3 02PR170 568 C~5i0z 2004 08 22.368895 22 02 47.58 -12 44 33.1 23.3r 02PR170 568 C~5i0z 2017 09 16.463692 22 57 34.36 -07 15 43.6 23.4r 02PR170 568 C~5i0z 2017 09 16.468904 22 57 34.33 -07 15 43.6 02PR170 568 C~5i0z 2017 09 17.458496 22 57 30.35 -07 16 08.5 23.4r 02PR170 568 C~5i0z 2017 09 17.463713 22 57 30.33 -07 16 08.7 02PR170 568 C~5i0z 2017 09 17.523178 22 57 30.09 -07 16 09.9 02PR170 568 C~5i0z
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 0.59 0.00 -0.29
2 0.0002 0.00 0.49 0.00 -0.16
3 0.0003 0.00 0.77 0.00 0.03
4 0.0082 0.00 0.13 0.00 -0.52
5 0.0814 0.00 -0.48 0.00 0.49
6 0.0814 0.00 -0.39 0.00 0.32
7 0.0815 0.00 -0.44 0.00 0.31
8 0.0815 0.00 -0.50 0.00 0.34
9 0.2563 0.00 0.03 0.00 -0.05
10 0.2618 0.00 -0.09 0.00 -0.12
11 0.3143 0.00 0.05 0.00 0.21
12 0.3170 0.00 -0.04 0.00 0.18
13 0.3170 0.00 0.02 0.00 0.09
14 0.3198 0.00 0.17 0.00 -0.23
15 0.8791 0.00 -0.01 0.00 -0.23
16 0.8818 0.00 -0.08 0.00 -0.12
17 0.8820 0.00 -0.29 0.00 -0.12
18 0.8821 0.00 -0.12 0.00 -0.06
19 2.0478 0.00 0.06 0.00 -0.11
20 2.0478 0.00 0.04 0.00 -0.16
21 2.0478 0.00 0.17 0.00 -0.01
22 2.0478 0.00 0.15 0.00 0.23
23 15.1158 0.00 -0.02 0.00 0.23
24 15.1158 0.00 -0.15 0.00 0.36
25 15.1185 0.00 0.03 0.00 -0.22
26 15.1186 0.00 0.05 0.00 -0.29
27 15.1187 0.00 0.10 0.00 -0.04
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.
02PR170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.333 44.333 44.333 ecceobj 0.083 0.083 0.083 incobj 0.856 0.856 0.856 qmin 39.723 39.757 39.744 qmax 49.009 49.032 49.053 amean 44.266 44.266 44.266 amin 43.903 43.903 43.917 amax 44.645 44.640 44.637 emean 0.082 0.082 0.082 emin 0.066 0.066 0.066 emax 0.098 0.099 0.099 imean 1.793 1.793 1.793 imin 1.000 1.000 1.000 imax 2.467 2.466 2.463 excite_mean 0.089 0.089 0.088 fracstop 1.000 1.000 1.000 cjmean 3.095 3.095 3.095 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 166.4 166.6 166.5 kozaiamp 180.0 180.0 179.9