Orbit Fit and Astrometric record for 02PS170

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 Sat Mar 30 01:10:56 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