Orbit Fit and Astrometric record for 02PQ152

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: 02PQ152   
# Created Sun Mar 24 01:08:05 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   33 observations of   33
# Arc:  16.11y
# First observation: 2001/09/19
#  Last observation: 2017/10/28
# Chi-squared of fit:    91.91 DOF:   60 RMS:  0.30
# Min/Max residuals:    -0.53    1.17
# Exact a, adot, b, bdot, g, gdot:
  2.404696E-05  7.338327E-02  5.913952E-06  1.195278E-02  4.979024E-02  1.462191E-03
# Covariance matrix:
  1.2479E-13 -2.1152E-14  4.4700E-15 -2.1773E-15 -1.5965E-14 -8.0183E-15
 -2.1152E-14  7.2096E-15 -2.1587E-15  1.0477E-15  4.6213E-15  3.9422E-15
  4.4700E-15 -2.1587E-15  9.6707E-14 -8.0325E-15 -3.4816E-16 -1.3878E-15
 -2.1773E-15  1.0477E-15 -8.0325E-15  9.8947E-16  2.8735E-16  6.6796E-16
 -1.5965E-14  4.6213E-15 -3.4816E-16  2.8735E-16  9.6929E-14 -1.5431E-15
 -8.0183E-15  3.9422E-15 -1.3878E-15  6.6796E-16 -1.5431E-15  2.6367E-15
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.573070  -27.047192   -0.393224    0.025189   -0.921823  2452171.766509
# Heliocentric elements and errors
Epoch:              2452172.5000  =  2001/09/20
Mean Anomaly:            8.84534 +/-     0.586
Argument of Peri:      356.13208 +/-     0.000
Long of Asc Node:      324.87891 +/-     0.000
Inclination:             9.36201 +/-     0.000
Eccentricity:         0.18876427 +/-    0.0011
Semi-Major Axis:     25.79028866 +/-    0.0001
Time of Perihelion: 2450997.0753 +/-      77.8
Perihelion:          20.92200377 +/-    0.0276
Aphelion:            30.65857354 +/-    0.0276
Period (y)              130.9762 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           18.88371828 +/-    0.0010
Ecliptic Y           -9.19248130 +/-    0.0005
Ecliptic Z            0.55148989 +/-    0.0000
Ecliptic XDOT         0.00188173 +/-    0.0000
Ecliptic YDOT         0.00356648 +/-    0.0000
Ecliptic ZDOT         0.00065943 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   21.00952051 +/-    0.0009
Geocenter to KBO     20.08428587 +/-    0.0011
# Hcoef:  9.13

The following table shows the complete astrometric record for 02PQ152. 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 (02PQ152) followed by the observatory code and reference code for the source of the astrometry.

2001 09  19.265766 22 17 18.36   -08 57 10.8   21.6V 02PQ152   645  C~1SKs      
2001 09  19.266595 22 17 18.36   -08 57 10.8   21.2V 02PQ152   645  C~1SKs      
2001 09  19.269083 22 17 18.34   -08 57 10.9   21.9V 02PQ152   645  C~1SKs      
2002 08  12.29280  22 37 21.34   -06 20 41.4   20.8R 02PQ152   807  Cg3360      
2002 08  12.37104  22 37 20.71   -06 20 44.3         02PQ152   807  Cg3360      
2002 09  10.25730  22 33 19.16   -06 41 03.2   21.3R 02PQ152   662  Cg3360      
2002 09  10.38032  22 33 18.13   -06 41 08.6         02PQ152   662  Cg3360      
2002 09  11.19041  22 33 11.43   -06 41 44.4   21.6R 02PQ152   662  Cg3360      
2002 09  11.27818  22 33 10.67   -06 41 48.3         02PQ152   662  Cg3360      
2002 10  04.18856  22 30 18.74   -06 57 09.1   22.0R 02PQ152   688  Cg3360      
2002 10  04.29491  22 30 18.00   -06 57 13.2         02PQ152   688  Cg3360      
2002 11  04.07719  22 28 05.00   -07 09 32.8   21.5R 02PQ152   688  Cg5879      
2002 11  04.17847  22 28 04.81   -07 09 33.7         02PQ152   688  Cg5879      
2004 07  16.34292  23 08 39.66   -01 49 27.6   21.5R 02PQ152   807  C~077I      
2004 07  16.39442  23 08 39.44   -01 49 28.2         02PQ152   807  C~077I      
2007 10  11.27426  23 40 05.18   +03 40 44.9   22.1R 02PQ152   688  C~077I      
2007 10  11.33360  23 40 04.69   +03 40 41.9         02PQ152   688  C~077I      
2009 10  12.27845  00 07 11.69   +07 44 41.4   22.8R 02PQ152   688  C~09x7      
2009 10  12.32486  00 07 11.32   +07 44 39.1         02PQ152   688  C~09x7      
2012 10  09.34925  00 47 56.487  +13 28 39.90  23.4G 02PQ152   F51  C~2r7A      
2012 10  09.36336  00 47 56.348  +13 28 39.33  22.9G 02PQ152   F51  C~2r7A      
2012 10  09.37758  00 47 56.244  +13 28 38.30  23.1G 02PQ152   F51  C~2r7A      
2012 10  09.39187  00 47 56.097  +13 28 37.70  22.6G 02PQ152   F51  C~2r7A      
2014 10  01.56244  01 15 42.127  +16 59 45.80  23.4G 02PQ152   F51  C~2r7A      
2014 10  25.47837  01 12 26.025  +16 42 08.39  23.1G 02PQ152   F51  C~2r7A      
2014 10  26.26125  01 12 19.76   +16 41 30.3   23.0R 02PQ152   G37  C~1eMs      
2014 10  26.32635  01 12 19.23   +16 41 27.0         02PQ152   G37  C~1eMs      
2014 10  26.36841  01 12 18.89   +16 41 24.9         02PQ152   G37  C~1eMs      
2014 10  29.24224  01 11 56.13   +16 39 03.5         02PQ152   G37  C~1eMs      
2014 10  29.24635  01 11 56.10   +16 39 03.4         02PQ152   G37  C~1eMs      
2015 07  25.57561  01 33 42.268  +18 37 38.98  23.2G 02PQ152   F51  C~2r7A      
2016 10  25.49274  01 38 47.401  +19 48 05.88  23.0G 02PQ152   F51  C~2r7A      
2017 10  28.33369  01 51 35.979  +21 11 27.12  22.8G 02PQ152   F51  C~2r7A      

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     0.01       0.00    -0.46
  2   0.0000      0.00     0.11       0.00    -0.43
  3   0.0000      0.00     0.10       0.00    -0.44
  4   0.8954      0.00    -0.25       0.00    -0.24
  5   0.8956      0.00    -0.22       0.00    -0.17
  6   0.9747      0.00    -0.24       0.00     0.76
  7   0.9750      0.00    -0.08       0.00     0.72
  8   0.9772      0.00    -0.20       0.00     0.15
  9   0.9774      0.00    -0.53       0.00     0.07
 10   1.0402      0.00     1.17       0.00     0.20
 11   1.0405      0.00     0.62       0.00    -0.15
 12   1.1247      0.00    -0.25       0.00    -0.19
 13   1.1250      0.00    -0.05       0.00     0.00
 14   2.8229      0.00     0.12       0.00    -0.05
 15   2.8231      0.00     0.15       0.00    -0.09
 16   6.0589      0.00     0.25       0.00     0.27
 17   6.0590      0.00    -0.41       0.00     0.14
 18   8.0630      0.00    -0.31       0.00     0.23
 19   8.0631      0.00    -0.39       0.00     0.26
 20  11.0557      0.00     0.19       0.00     0.06
 21  11.0557      0.00    -0.12       0.00     0.15
 22  11.0557      0.00     0.10       0.00    -0.20
 23  11.0558      0.00    -0.31       0.00    -0.13
 24  13.0330      0.00     0.11       0.00     0.11
 25  13.0985      0.00     0.15       0.00    -0.27
 26  13.1006      0.00     0.10       0.00    -0.04
 27  13.1008      0.00     0.10       0.00    -0.14
 28  13.1009      0.00     0.12       0.00    -0.17
 29  13.1088      0.00     0.07       0.00    -0.22
 30  13.1088      0.00     0.11       0.00    -0.12
 31  13.8462      0.00     0.14       0.00     0.00
 32  15.0999      0.00     0.05       0.00     0.09
 33  16.1070      0.00    -0.29       0.00     0.19

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.

02PQ152    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        25.930    25.930    25.930
ecceobj         0.193     0.193     0.193
incobj          9.344     9.344     9.344
qmin           20.923    20.923    20.923
qmax           31.695    30.938    30.937
amean          27.326    26.257    26.230
amin           25.656    25.657    25.655
amax           29.240    27.067    27.467
emean           0.106     0.155     0.156
emin            0.068     0.122     0.102
emax            0.193     0.193     0.193
imean          11.226    10.677    10.695
imin           10.344    10.508    10.600
imax           12.067    10.760    10.762
excite_mean     0.222     0.242     0.243
fracstop        0.022     0.002     0.002
cjmean          2.962     2.958     2.957

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       115.2      58.3      66.3
kozaiamp        179.1     179.1     179.1