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: 02PZ170 # Created Sat Apr 27 01:10:53 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 32 observations of 32 # Arc: 19.17y # First observation: 2002/08/05 # Last observation: 2021/10/07 # Chi-squared of fit: 22.42 DOF: 58 RMS: 0.15 # Min/Max residuals: -0.31 0.40 # Exact a, adot, b, bdot, g, gdot: 1.476652E-05 2.301773E-02 -7.204858E-07 -8.684641E-05 2.397884E-02 1.098061E-03 # Covariance matrix: 1.2863E-13 -3.0183E-14 -5.7715E-16 1.2295E-16 6.5553E-14 -6.1344E-14 -3.0183E-14 5.1817E-14 1.6908E-17 -1.9495E-16 1.6940E-14 1.1960E-13 -5.7715E-16 1.6908E-17 8.1027E-14 -4.7838E-15 -1.1962E-15 7.1617E-17 1.2295E-16 -1.9495E-16 -4.7838E-15 6.4973E-16 -9.2231E-18 -4.5714E-16 6.5553E-14 1.6940E-14 -1.1962E-15 -9.2231E-18 1.6190E-13 3.5420E-14 -6.1344E-14 1.1960E-13 7.1617E-17 -4.5714E-16 3.5420E-14 2.7966E-13 # lat0 lon0 xBary yBary zBary JD0 -1.281033 -31.126481 0.284751 -0.021923 -0.977618 2452491.956773 # Heliocentric elements and errors Epoch: 2452492.5000 = 2002/08/06 Mean Anomaly: 97.09062 +/- 0.081 Argument of Peri: 158.27411 +/- 0.073 Long of Asc Node: 68.65371 +/- 0.003 Inclination: 1.27167 +/- 0.000 Eccentricity: 0.03971211 +/- 0.0000 Semi-Major Axis: 42.40591319 +/- 0.0028 Time of Perihelion: 2425289.7492 +/- 22.9 Perihelion: 40.72188471 +/- 0.0028 Aphelion: 44.08994167 +/- 0.0030 Period (y) 276.1518 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 36.38034958 +/- 0.0006 Ecliptic Y -22.29577304 +/- 0.0004 Ecliptic Z -0.93234126 +/- 0.0000 Ecliptic XDOT 0.00145788 +/- 0.0000 Ecliptic YDOT 0.00218248 +/- 0.0000 Ecliptic ZDOT -0.00001251 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.67901689 +/- 0.0005 Geocenter to KBO 41.70343868 +/- 0.0007 # Hcoef: 7.59
The following table shows the complete astrometric record for 02PZ170. 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 (02PZ170) followed by the observatory code and reference code for the source of the astrometry.
2002 08 05.45603 22 05 52.65 -13 03 59.6 23.5R 02PZ170 568 Cp2010 2002 08 05.51978 22 05 52.36 -13 04 00.9 23.7R 02PZ170 568 Cp2010 2002 08 05.58203 22 05 52.08 -13 04 02.5 24.1R 02PZ170 568 Cp2010 2002 08 09.44155 22 05 35.16 -13 05 37.2 02PZ170 568 Cp2010 2002 09 04.16945 22 03 38.78 -13 16 09.1 02PZ170 309 Cp2010 2002 09 04.17557 22 03 38.76 -13 16 09.2 02PZ170 309 Cp2010 2002 09 04.21223 22 03 38.59 -13 16 10.1 02PZ170 309 Cp2010 2002 09 04.21835 22 03 38.56 -13 16 10.2 02PZ170 309 Cp2010 2002 09 30.278974 22 01 54.81 -13 25 08.9 02PZ170 568 C~5V8O 2002 09 30.334080 22 01 54.61 -13 25 09.8 02PZ170 568 C~5V8O 2002 09 30.395962 22 01 54.41 -13 25 10.9 02PZ170 568 C~5V8O 2002 11 28.213320 22 00 53.20 -13 28 58.8 23.6r 02PZ170 568 C~5V8O 2002 11 29.216851 22 00 54.84 -13 28 48.1 02PZ170 568 C~5V8O 2002 11 30.214437 22 00 56.55 -13 28 36.6 23.8r 02PZ170 568 C~5V8O 2003 06 24.529543 22 13 13.73 -12 22 54.3 02PZ170 568 C~5V8O 2003 06 25.503143 22 13 11.86 -12 23 06.6 02PZ170 568 C~5V8O 2003 06 25.553990 22 13 11.75 -12 23 07.0 23.6r 02PZ170 568 C~5V8O 2003 06 25.602405 22 13 11.63 -12 23 07.6 02PZ170 568 C~5V8O 2005 10 26.211984 22 15 48.19 -12 08 57.2 02PZ170 568 C~5V8O 2005 10 26.259280 22 15 48.10 -12 08 57.8 02PZ170 568 C~5V8O 2005 10 26.306965 22 15 48.01 -12 08 58.1 23.1i 02PZ170 568 C~5V8O 2019 08 28.205327 23 27 09.96 -04 55 45.0 02PZ170 W84 C~5V8O 2019 08 29.211497 23 27 05.78 -04 56 12.1 02PZ170 W84 C~5V8O 2019 08 29.252898 23 27 05.59 -04 56 13.5 02PZ170 W84 C~5V8O 2019 08 29.336479 23 27 05.25 -04 56 15.7 02PZ170 W84 C~5V8O 2019 08 29.378075 23 27 05.08 -04 56 16.9 02PZ170 W84 C~5V8O 2019 09 27.014583 23 25 02.093 -05 09 21.60 23.9r 02PZ170 W84 C~7Wu0 2019 09 27.176040 23 25 01.397 -05 09 25.89 23.9r 02PZ170 W84 C~7Wu0 2021 09 05.096099 23 35 59.954 -03 58 12.40 24.0r 02PZ170 W84 C~7Wu0 2021 09 05.195929 23 35 59.519 -03 58 15.13 24.0r 02PZ170 W84 C~7Wu0 2021 10 07.004805 23 33 44.309 -04 12 36.84 24.0r 02PZ170 W84 C~7Wu0 2021 10 07.169933 23 33 43.642 -04 12 40.97 24.0r 02PZ170 W84 C~7Wu0
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 0.03 0.00 0.16
2 0.0002 0.00 -0.09 0.00 0.40
3 0.0003 0.00 -0.16 0.00 0.30
4 0.0109 0.00 -0.01 0.00 -0.08
5 0.0814 0.00 -0.17 0.00 0.09
6 0.0814 0.00 -0.05 0.00 0.14
7 0.0815 0.00 -0.12 0.00 0.10
8 0.0815 0.00 -0.15 0.00 0.14
9 0.1528 0.00 0.07 0.00 -0.25
10 0.1530 0.00 -0.08 0.00 -0.22
11 0.1532 0.00 0.12 0.00 -0.28
12 0.3142 0.00 0.14 0.00 -0.15
13 0.3169 0.00 0.12 0.00 -0.14
14 0.3197 0.00 -0.09 0.00 0.25
15 0.8845 0.00 -0.10 0.00 -0.10
16 0.8872 0.00 0.28 0.00 -0.18
17 0.8873 0.00 0.21 0.00 0.08
18 0.8875 0.00 -0.09 0.00 0.10
19 3.2245 0.00 0.20 0.00 0.00
20 3.2246 0.00 0.13 0.00 -0.22
21 3.2248 0.00 0.08 0.00 -0.14
22 17.0616 0.00 0.06 0.00 0.10
23 17.0644 0.00 -0.09 0.00 0.14
24 17.0645 0.00 -0.31 0.00 -0.14
25 17.0647 0.00 -0.11 0.00 -0.08
26 17.0648 0.00 -0.03 0.00 -0.16
27 17.1432 0.00 0.03 0.00 -0.01
28 17.1437 0.00 -0.03 0.00 -0.04
29 19.0846 0.00 0.10 0.00 0.05
30 19.0848 0.00 0.03 0.00 0.08
31 19.1719 0.00 0.05 0.00 0.06
32 19.1724 0.00 0.11 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.
02PZ170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.716 42.716 42.716 ecceobj 0.038 0.038 0.038 incobj 1.272 1.272 1.272 qmin 40.256 40.257 40.276 qmax 45.151 45.159 45.160 amean 42.619 42.619 42.619 amin 42.291 42.293 42.284 amax 42.953 42.956 42.960 emean 0.031 0.031 0.031 emin 0.008 0.008 0.008 emax 0.051 0.051 0.052 imean 1.441 1.441 1.441 imin 0.233 0.233 0.234 imax 2.065 2.065 2.064 excite_mean 0.042 0.042 0.042 fracstop 1.000 1.000 1.000 cjmean 3.083 3.083 3.083 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 179.6 179.9 179.6 kozaiamp 179.9 180.0 179.9