Orbit Fit and Astrometric record for 02PD155

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: 02PD155   
# Created Thu Dec  9 02:09:21 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     18 observations of     18
# Arc:  19.17y
# First observation: 2001/08/21
#  Last observation: 2020/10/20
# Chi-squared of fit:   277.81 DOF:     30 RMS:  0.69
# Min/Max residuals:    -1.24    1.58
# Exact a, adot, b, bdot, g, gdot:
  1.508673E-05  2.274804E-02  2.962149E-06  2.214821E-03  2.379208E-02  1.703975E-05
# Covariance matrix:
  3.3069E-13 -1.1941E-13  1.1743E-14 -1.1772E-14  1.8404E-13 -2.5745E-13
 -1.1941E-13  1.7111E-13 -1.4971E-14  1.6972E-14  1.1970E-13  3.6183E-13
  1.1743E-14 -1.4971E-14  1.5319E-13 -1.0625E-14 -5.6812E-15 -3.2374E-14
 -1.1772E-14  1.6972E-14 -1.0625E-14  3.3511E-15  1.0213E-14  3.6386E-14
  1.8404E-13  1.1970E-13 -5.6812E-15  1.0213E-14  7.2530E-13  2.0185E-13
 -2.5745E-13  3.6183E-13 -3.2374E-14  3.6386E-14  2.0185E-13  7.7705E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.539032  -22.622159    0.168001    0.026712   -0.997926  2452142.677053
# Heliocentric elements and errors
Epoch:              2452142.5000  =  2001/08/21
Mean Anomaly:          304.90229 +/-     0.635
Argument of Peri:       70.92024 +/-     0.647
Long of Asc Node:      322.13211 +/-     0.000
Inclination:             5.77888 +/-     0.000
Eccentricity:         0.00760816 +/-    0.0001
Semi-Major Axis:     43.21582181 +/-    0.0058
Time of Perihelion: 2468024.0776 +/-     183.9
Perihelion:          42.88702897 +/-    0.0064
Aphelion:            43.54461465 +/-    0.0065
Period (y)              284.1007 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.64279774 +/-    0.0014
Ecliptic Y          -16.69436753 +/-    0.0006
Ecliptic Z            1.12897502 +/-    0.0000
Ecliptic XDOT         0.00099376 +/-    0.0000
Ecliptic YDOT         0.00241951 +/-    0.0000
Ecliptic ZDOT         0.00025504 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.02938819 +/-    0.0013
Geocenter to KBO     42.03083327 +/-    0.0015
# Hcoef:  6.89

The following table shows the complete astrometric record for 02PD155. 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 (02PD155) followed by the observatory code and reference code for the source of the astrometry.

2001 08  21.17631  22 34 00.06   -07 22 18.8   22.0R 02PD155   807  Ch1602      
2001 08  21.25156  22 33 59.72   -07 22 20.5         02PD155   807  Ch1602      
2001 09  12.26600  22 32 22.54   -07 31 28.8   22.9R 02PD155   695  Ch1602      
2001 09  12.31021  22 32 22.36   -07 31 29.8         02PD155   695  Ch1602      
2002 08  12.29280  22 39 19.91   -06 42 37.8   21.7R 02PD155   807  Ch1602      
2002 08  12.37104  22 39 19.57   -06 42 39.6         02PD155   807  Ch1602      
2002 11  07.10355  22 34 13.40   -07 12 37.0   23.1R 02PD155   695  Ch1602      
2002 11  08.10036  22 34 12.29   -07 12 45.4         02PD155   695  Ch1602      
2002 11  08.12870  22 34 12.26   -07 12 44.7         02PD155   695  Ch1602      
2004 09  18.34812  22 45 55.67   -05 45 40.4   23.3R 02PD155   568  Cl5725      
2004 09  18.41217  22 45 55.38   -05 45 42.0         02PD155   568  Cl5725      
2007 06  13.69406  23 04 38.72   -03 30 59.6   23.8R 02PD155   250  S~06AX      
2007 06  13.70101  23 04 38.72   -03 30 59.6         02PD155   250  S~06AX      
2007 06  13.70864  23 04 38.72   -03 30 59.5         02PD155   250  S~06AX      
2007 06  13.71559  23 04 38.72   -03 30 59.5         02PD155   250  S~06AX      
2020 10  20.103130 23 57 49.142  +03 51 26.08  23.6G 02PD155   G37  C~4Knz      
2020 10  20.151630 23 57 48.952  +03 51 24.65        02PD155   G37  C~4Knz      
2020 10  20.212650 23 57 48.713  +03 51 22.92        02PD155   G37  C~4Knz      

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     0.12       0.00    -0.28
     2   0.0002      0.00     0.07       0.00    -0.15
     3   0.0605      0.00     0.51       0.00    -0.29
     4   0.0606      0.00     0.72       0.00    -0.20
     5   0.9750      0.00     0.10       0.00    -0.29
     6   0.9752      0.00    -0.04       0.00    -0.32
     7   1.2127      0.00     0.25       0.00    -0.60
     8   1.2154      0.00     0.40       0.00    -1.24
     9   1.2155      0.00     0.44       0.00    -0.32
    10   3.0778      0.00    -0.41       0.00    -0.58
    11   3.0780      0.00    -0.62       0.00    -0.57
    12   5.8111      0.00    -0.56       0.00     1.56
    13   5.8112      0.00    -0.58       0.00     1.52
    14   5.8112      0.00    -0.59       0.00     1.58
    15   5.8112      0.00    -0.61       0.00     1.54
    16  19.1648      0.00     0.30       0.00    -0.39
    17  19.1649      0.00     0.26       0.00    -0.55
    18  19.1651      0.00     0.21       0.00    -0.67

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.

02PD155    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.444    43.444    43.444
ecceobj         0.011     0.011     0.011
incobj          5.762     5.762     5.762
qmin           42.093    42.094    42.092
qmax           44.678    44.678    44.678
amean          43.282    43.282    43.282
amin           42.955    42.956    42.953
amax           43.613    43.613    43.613
emean           0.010     0.010     0.010
emin            0.000     0.000     0.000
emax            0.025     0.025     0.025
imean           6.918     6.918     6.918
imin            6.203     6.203     6.203
imax            7.576     7.576     7.576
excite_mean     0.121     0.121     0.121
fracstop        1.000     1.000     1.000
cjmean          3.075     3.075     3.075

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       177.2     177.3     177.3
kozaiamp        179.9     180.0     179.9