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: 02PS170 # Created Sun Nov 24 02:08:19 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 30 observations of 30 # Arc: 19.16y # First observation: 2002/08/05 # Last observation: 2021/10/02 # Chi-squared of fit: 20.65 DOF: 54 RMS: 0.15 # Min/Max residuals: -0.34 0.42 # Exact a, adot, b, bdot, g, gdot: 1.595737E-05 2.510718E-02 -1.122282E-06 -8.751112E-04 2.490705E-02 1.555748E-03 # Covariance matrix: 1.3167E-13 -4.4941E-14 -1.1131E-15 1.5135E-15 6.3754E-14 -9.0774E-14 -4.4941E-14 8.5698E-14 1.4349E-15 -3.0970E-15 -4.3694E-15 1.8480E-13 -1.1131E-15 1.4349E-15 9.2571E-14 -5.2918E-15 -1.4020E-15 3.2144E-15 1.5135E-15 -3.0970E-15 -5.2918E-15 7.3690E-16 3.6326E-16 -6.7424E-15 6.3754E-14 -4.3694E-15 -1.4020E-15 3.6326E-16 1.8507E-13 -2.3058E-14 -9.0774E-14 1.8480E-13 3.2144E-15 -6.7424E-15 -2.3058E-14 4.0243E-13 # lat0 lon0 xBary yBary zBary JD0 -1.169931 -33.436712 0.245754 -0.020246 -0.988186 2452491.917843 # Heliocentric elements and errors Epoch: 2452492.5000 = 2002/08/06 Mean Anomaly: 39.45733 +/- 0.022 Argument of Peri: 163.89259 +/- 0.026 Long of Asc Node: 116.59387 +/- 0.001 Inclination: 2.30849 +/- 0.000 Eccentricity: 0.08008835 +/- 0.0001 Semi-Major Axis: 43.71382039 +/- 0.0036 Time of Perihelion: 2440922.0089 +/- 6.6 Perihelion: 40.21285284 +/- 0.0041 Aphelion: 47.21478795 +/- 0.0046 Period (y) 289.0256 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 34.18689016 +/- 0.0006 Ecliptic Y -22.86216314 +/- 0.0004 Ecliptic Z -0.81977284 +/- 0.0000 Ecliptic XDOT 0.00165398 +/- 0.0000 Ecliptic YDOT 0.00220737 +/- 0.0000 Ecliptic ZDOT -0.00009946 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.13503545 +/- 0.0005 Geocenter to KBO 40.14927456 +/- 0.0007 # Hcoef: 7.85
The following table shows the complete astrometric record for 02PS170. 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 (02PS170) followed by the observatory code and reference code for the source of the astrometry.
2002 08 05.41710 21 56 48.43 -13 45 38.8 23.5R 02PS170 568 Cp2009 2002 08 05.47983 21 56 48.15 -13 45 40.4 23.9R 02PS170 568 Cp2009 2002 08 05.54147 21 56 47.84 -13 45 41.6 23.4R 02PS170 568 Cp2009 2002 08 08.43317 21 56 34.65 -13 46 54.4 02PS170 568 Cp2009 2002 09 04.15548 21 54 30.05 -13 58 02.9 02PS170 309 Cp2009 2002 09 04.16160 21 54 30.04 -13 58 03.0 02PS170 309 Cp2009 2002 09 04.19819 21 54 29.87 -13 58 04.1 02PS170 309 Cp2009 2002 09 04.20432 21 54 29.85 -13 58 04.1 02PS170 309 Cp2009 2002 10 06.322176 21 52 26.95 -14 08 33.2 23.5R 02PS170 568 C~5Rk5 2002 10 06.360791 21 52 26.84 -14 08 33.7 02PS170 568 C~5Rk5 2002 11 28.203018 21 51 56.83 -14 10 05.0 23.1r 02PS170 568 C~5Rk5 2002 11 29.206966 21 51 58.81 -14 09 53.5 02PS170 568 C~5Rk5 2002 11 30.204846 21 52 00.88 -14 09 41.3 02PS170 568 C~5Rk5 2003 06 22.514372 22 04 55.71 -13 04 01.2 23.1i 02PS170 568 C~5Rk5 2003 06 23.504925 22 04 53.74 -13 04 14.2 02PS170 568 C~5Rk5 2003 06 23.556335 22 04 53.64 -13 04 14.7 22.9i 02PS170 568 C~5Rk5 2003 06 23.605004 22 04 53.53 -13 04 15.3 02PS170 568 C~5Rk5 2005 09 02.312593 22 11 21.85 -12 36 22.9 02PS170 568 C~5Rk5 2019 08 28.205327 23 25 59.84 -05 43 06.6 02PS170 W84 C~5Rk5 2019 08 28.398282 23 25 59.02 -05 43 11.8 02PS170 W84 C~5Rk5 2019 09 27.014583 23 23 49.711 -05 57 07.56 24.3r 02PS170 W84 C~7XOQ 2019 09 27.176040 23 23 49.001 -05 57 11.83 24.3r 02PS170 W84 C~7XOQ 2020 10 16.001792 23 27 35.615 -05 34 53.64 24.4r 02PS170 W84 C~7XOQ 2020 10 16.175804 23 27 34.968 -05 34 57.50 24.4r 02PS170 W84 C~7XOQ 2020 10 19.015429 23 27 24.934 -05 35 57.66 24.4r 02PS170 W84 C~7XOQ 2020 10 19.170607 23 27 24.387 -05 36 00.84 24.4r 02PS170 W84 C~7XOQ 2021 09 13.055538 23 34 57.497 -04 49 56.68 24.1r 02PS170 W84 C~7XOQ 2021 09 13.174687 23 34 56.964 -04 50 00.35 24.1r 02PS170 W84 C~7XOQ 2021 10 02.027293 23 33 35.066 -04 58 44.99 24.3r 02PS170 W84 C~7XOQ 2021 10 02.165093 23 33 34.468 -04 58 48.63 24.3r 02PS170 W84 C~7XOQ
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 -0.04 0.00 0.11
2 0.0002 0.00 0.11 0.00 0.08
3 0.0003 0.00 -0.27 0.00 0.42
4 0.0083 0.00 0.11 0.00 0.28
5 0.0814 0.00 -0.34 0.00 0.23
6 0.0814 0.00 -0.07 0.00 0.28
7 0.0815 0.00 -0.09 0.00 0.04
8 0.0816 0.00 0.03 0.00 0.19
9 0.1695 0.00 0.03 0.00 -0.29
10 0.1696 0.00 0.10 0.00 -0.25
11 0.3143 0.00 0.22 0.00 -0.05
12 0.3170 0.00 0.08 0.00 -0.23
13 0.3197 0.00 0.04 0.00 -0.13
14 0.8791 0.00 -0.06 0.00 -0.16
15 0.8818 0.00 0.08 0.00 -0.28
16 0.8820 0.00 0.21 0.00 -0.10
17 0.8821 0.00 0.12 0.00 -0.05
18 3.0771 0.00 -0.11 0.00 -0.11
19 17.0617 0.00 -0.00 0.00 -0.16
20 17.0622 0.00 0.09 0.00 0.05
21 17.1433 0.00 0.07 0.00 -0.03
22 17.1438 0.00 -0.03 0.00 0.05
23 18.1974 0.00 0.06 0.00 0.04
24 18.1978 0.00 -0.02 0.00 -0.03
25 18.2056 0.00 -0.00 0.00 -0.00
26 18.2060 0.00 0.02 0.00 0.02
27 19.1065 0.00 -0.08 0.00 0.18
28 19.1068 0.00 -0.10 0.00 -0.07
29 19.1584 0.00 0.04 0.00 -0.01
30 19.1588 0.00 -0.11 0.00 -0.02
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.
02PS170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.053 44.053 44.053 ecceobj 0.085 0.085 0.085 incobj 2.306 2.306 2.306 qmin 39.704 39.711 39.709 qmax 48.451 48.452 48.449 amean 43.953 43.953 43.953 amin 43.601 43.591 43.599 amax 44.336 44.327 44.328 emean 0.076 0.076 0.076 emin 0.059 0.059 0.059 emax 0.093 0.093 0.093 imean 1.372 1.372 1.372 imin 0.506 0.506 0.506 imax 2.072 2.073 2.071 excite_mean 0.081 0.081 0.081 fracstop 1.000 1.000 1.000 cjmean 3.093 3.093 3.093 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 166.8 166.7 166.8 kozaiamp 180.0 179.9 180.0