Orbit Fit and Astrometric record for 01XQ254

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: 01XQ254   
# Created Fri Feb 22 02:08:00 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   81 observations of   81
# Arc:  16.27y
# First observation: 2001/12/10
#  Last observation: 2018/03/18
# Chi-squared of fit:   131.36 DOF:  156 RMS:  0.23
# Min/Max residuals:    -0.63    0.95
# Exact a, adot, b, bdot, g, gdot:
  2.140762E-05  4.327913E-02  2.064496E-06  5.354319E-03  3.266818E-02 -3.605645E-03
# Covariance matrix:
  1.6129E-13 -2.5048E-14  5.5704E-15 -2.1680E-15  3.8327E-15 -2.0085E-14
 -2.5048E-14  7.8331E-15 -2.2963E-15  8.8894E-16  5.7033E-15  8.1354E-15
  5.5704E-15 -2.2963E-15  1.1802E-13 -8.8306E-15 -1.0912E-15 -2.6747E-15
 -2.1680E-15  8.8894E-16 -8.8306E-15  8.1590E-16  3.8836E-16  1.0379E-15
  3.8327E-15  5.7033E-15 -1.0912E-15  3.8836E-16  5.4635E-14  2.8371E-15
 -2.0085E-14  8.1354E-15 -2.6747E-15  1.0379E-15  2.8371E-15  9.5514E-15
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.929088  100.626485    0.368518   -0.014783   -0.906862  2452254.003713
# Heliocentric elements and errors
Epoch:              2452254.5000  =  2001/12/11
Mean Anomaly:          353.99595 +/-     0.001
Argument of Peri:       10.08643 +/-     0.001
Long of Asc Node:      107.21896 +/-     0.000
Inclination:             7.09613 +/-     0.000
Eccentricity:         0.44716393 +/-    0.0000
Semi-Major Axis:     56.21720142 +/-    0.0033
Time of Perihelion: 2454822.2005 +/-      13.5
Perihelion:          31.07889671 +/-    0.0025
Aphelion:            81.35550613 +/-    0.0051
Period (y)              421.5140 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -5.44804437 +/-    0.0000
Ecliptic Y           31.04676034 +/-    0.0002
Ecliptic Z           -0.49629924 +/-    0.0000
Ecliptic XDOT        -0.00351914 +/-    0.0000
Ecliptic YDOT        -0.00095871 +/-    0.0000
Ecliptic ZDOT         0.00045379 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.52511121 +/-    0.0002
Geocenter to KBO     30.61091596 +/-    0.0002
# Hcoef:  7.85

The following table shows the complete astrometric record for 01XQ254. 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 (01XQ254) followed by the observatory code and reference code for the source of the astrometry.

2001 12  10.50297  06 45 54.63   +22 05 16.1         01XQ254   568  Ce7056      
2001 12  10.52777  06 45 54.49   +22 05 16.4         01XQ254   568  Ce7056      
2001 12  10.55144  06 45 54.33   +22 05 16.6         01XQ254   568  Ce7056      
2002 01  08.51228  06 42 44.92   +22 09 59.3   22.2R 01XQ254   568  Ce7056      
2002 01  08.53796  06 42 44.74   +22 09 59.5   22.5R 01XQ254   568  Ce7056      
2002 11  28.39920  06 57 53.04   +22 08 27.3         01XQ254   695  Ci0016      
2002 11  28.45383  06 57 52.74   +22 08 27.7   22.5R 01XQ254   695  Ci0016      
2002 11  28.51356  06 57 52.44   +22 08 28.1   22.5R 01XQ254   695  Ci0016      
2003 04  29.27787  06 50 31.18   +22 26 55.9   22.5R 01XQ254   568  Ci0016      
2003 04  30.27606  06 50 36.45   +22 26 53.1         01XQ254   568  Ci0016      
2005 12  23.40227  07 28 24.54   +22 13 15.6   21.9R 01XQ254   568  Cp7668      
2005 12  23.45592  07 28 24.19   +22 13 15.7         01XQ254   568  Cp7668      
2008 11  30.43965  08 03 20.90   +21 41 35.2   20.9R 01XQ254   688  C~02MK      
2008 11  30.48417  08 03 20.63   +21 41 35.5         01XQ254   688  C~02MK      
2010 05  12.26568  08 05 37.601  +21 58 54.42  23.1G 01XQ254   F51  C~2rXf      
2010 11  15.53463  08 25 34.205  +21 07 27.97  22.7G 01XQ254   F51  C~2rXf      
2011 01  25.36732  08 20 08.561  +21 31 40.61  22.2G 01XQ254   F51  C~2rXf      
2011 01  26.32586  08 20 02.320  +21 32 03.76  22.1G 01XQ254   F51  C~2rXf      
2011 01  30.46905  08 19 35.309  +21 33 43.25  22.8G 01XQ254   F51  C~2rXf      
2011 01  30.48429  08 19 35.213  +21 33 43.58  22.8G 01XQ254   F51  C~2rXf      
2011 01  30.50059  08 19 35.104  +21 33 43.97  22.6G 01XQ254   F51  C~2rXf      
2011 01  30.51568  08 19 35.009  +21 33 44.37  22.9G 01XQ254   F51  C~2rXf      
2011 04  26.26218  08 15 19.168  +21 47 45.34  22.9G 01XQ254   F51  C~2rXf      
2012 01  26.54374  08 30 59.748  +21 13 41.94  22.1G 01XQ254   F51  C~2rXf      
2014 02  23.26697  08 49 44.890  +20 41 43.72  23.1G 01XQ254   F51  C~2rXf      
2014 02  26.41951  08 49 27.331  +20 42 53.04  23.1G 01XQ254   F51  C~2rXf      
2014 02  26.44552  08 49 27.198  +20 42 53.53  23.1G 01XQ254   F51  C~2rXf      
2014 12  26.48822  09 06 09.403  +19 48 48.31  22.8G 01XQ254   F51  C~2rXf      
2015 01  14.38176  09 04 31.193  +19 57 40.05  22.9G 01XQ254   F51  C~2rXf      
2015 01  17.40837  09 04 13.343  +19 59 10.19  22.7G 01XQ254   F51  C~2rXf      
2015 01  17.42034  09 04 13.295  +19 59 10.86  22.8G 01XQ254   F51  C~2rXf      
2015 01  17.43237  09 04 13.216  +19 59 11.12  23.8G 01XQ254   F51  C~2rXf      
2015 01  17.44441  09 04 13.152  +19 59 11.66  22.2G 01XQ254   F51  C~2rXf      
2015 01  17.56931  09 04 12.367  +19 59 15.16  23.1G 01XQ254   F51  C~2rXf      
2015 01  17.58160  09 04 12.303  +19 59 15.39  23.9G 01XQ254   F51  C~2rXf      
2015 01  17.59396  09 04 12.224  +19 59 15.85  22.7G 01XQ254   F51  C~2rXf      
2015 01  17.60637  09 04 12.149  +19 59 16.14  22.3G 01XQ254   F51  C~2rXf      
2015 01  20.37244  09 03 55.498  +20 00 39.19  22.4G 01XQ254   F51  C~2rXf      
2015 01  20.38446  09 03 55.422  +20 00 39.57  22.4G 01XQ254   F51  C~2rXf      
2015 01  20.39651  09 03 55.352  +20 00 39.91  22.2G 01XQ254   F51  C~2rXf      
2015 01  20.40876  09 03 55.274  +20 00 40.34  22.4G 01XQ254   F51  C~2rXf      
2015 01  22.39339  09 03 43.134  +20 01 39.87  22.9G 01XQ254   F51  C~2rXf      
2015 01  22.40551  09 03 43.050  +20 01 40.12  22.6G 01XQ254   F51  C~2rXf      
2015 01  22.41765  09 03 42.982  +20 01 40.64  22.7G 01XQ254   F51  C~2rXf      
2015 01  22.42981  09 03 42.909  +20 01 40.93  22.8G 01XQ254   F51  C~2rXf      
2015 02  12.33923  09 01 31.842  +20 11 51.15  22.1G 01XQ254   F51  C~2rXf      
2015 03  14.25598  08 58 48.912  +20 23 06.11  22.7G 01XQ254   F51  C~2rXf      
2015 03  15.23741  08 58 44.670  +20 23 21.80  22.4G 01XQ254   F51  C~2rXf      
2015 03  16.41124  08 58 39.713  +20 23 40.18  22.8G 01XQ254   F51  C~2rXf      
2015 03  17.35087  08 58 35.853  +20 23 54.84  22.8G 01XQ254   F51  C~2rXf      
2015 03  17.36337  08 58 35.799  +20 23 54.70  22.3G 01XQ254   F51  C~2rXf      
2015 03  17.37588  08 58 35.731  +20 23 55.26  22.6G 01XQ254   F51  C~2rXf      
2015 03  17.38849  08 58 35.701  +20 23 55.13  22.8G 01XQ254   F51  C~2rXf      
2015 11  08.58978  09 17 39.771  +19 08 32.49  23.6G 01XQ254   F51  C~2rXf      
2015 12  24.47437  09 16 43.647  +19 19 35.80  22.5G 01XQ254   F51  C~2rXf      
2016 01  18.40487  09 14 39.154  +19 31 31.15  22.6G 01XQ254   F51  C~2rXf      
2016 01  29.57089  09 13 31.803  +19 37 17.66  22.4G 01XQ254   F51  C~2rXf      
2016 02  03.38846  09 13 01.808  +19 39 46.02  22.5G 01XQ254   F51  C~2rXf      
2016 02  05.55079  09 12 48.285  +19 40 51.46  22.4G 01XQ254   F51  C~2rXf      
2016 03  03.28473  09 10 09.370  +19 52 53.07  22.9G 01XQ254   F51  C~2rXf      
2016 04  22.34017  09 07 42.074  +20 01 13.92  22.6G 01XQ254   F51  C~2rXf      
2016 12  23.64829  09 26 58.856  +18 49 24.64  22.7G 01XQ254   F51  C~2rXf      
2017 01  28.38062  09 23 57.197  +19 07 14.32  22.2G 01XQ254   F51  C~2rXf      
2017 01  28.39295  09 23 57.138  +19 07 14.35  22.3G 01XQ254   F51  C~2rXf      
2017 01  28.40517  09 23 57.043  +19 07 14.52  22.7G 01XQ254   F51  C~2rXf      
2017 01  28.41734  09 23 56.965  +19 07 15.27  22.9G 01XQ254   F51  C~2rXf      
2017 02  04.52058  09 23 13.347  +19 11 00.76  22.4G 01XQ254   F51  C~2rXf      
2017 02  04.53312  09 23 13.268  +19 11 01.01  22.1G 01XQ254   F51  C~2rXf      
2017 02  04.55814  09 23 13.100  +19 11 01.94  23.0G 01XQ254   F51  C~2rXf      
2017 02  22.35802  09 21 24.465  +19 19 52.20  22.3G 01XQ254   F51  C~2rXf      
2017 03  17.24164  09 19 24.282  +19 28 38.87  22.5G 01XQ254   F51  C~2rXf      
2018 01  14.59708  09 35 28.721  +18 27 58.63  22.6G 01XQ254   F51  C~2rXf      
2018 02  12.35249  09 32 40.521  +18 43 32.41  22.6G 01XQ254   F51  C~2rXf      
2018 02  12.36574  09 32 40.427  +18 43 32.75  22.5G 01XQ254   F51  C~2rXf      
2018 02  12.37906  09 32 40.351  +18 43 33.15  22.6G 01XQ254   F51  C~2rXf      
2018 02  12.39267  09 32 40.263  +18 43 33.43  22.1G 01XQ254   F51  C~2rXf      
2018 03  08.26832  09 30 21.627  +18 54 44.01  23.1G 01XQ254   F51  C~2rXf      
2018 03  08.28147  09 30 21.582  +18 54 44.08  23.2G 01XQ254   F51  C~2rXf      
2018 03  08.29467  09 30 21.503  +18 54 44.39  22.7G 01XQ254   F51  C~2rXf      
2018 03  08.30794  09 30 21.432  +18 54 44.94  23.1G 01XQ254   F51  C~2rXf      
2018 03  18.26792  09 29 32.494  +18 58 17.96  22.9G 01XQ254   F51  C~2rXf      

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    -0.09       0.00     0.12
  2   0.0001      0.00     0.11       0.00     0.19
  3   0.0001      0.00    -0.09       0.00     0.18
  4   0.0794      0.00    -0.17       0.00    -0.39
  5   0.0795      0.00    -0.28       0.00    -0.43
  6   0.9662      0.00     0.31       0.00     0.35
  7   0.9663      0.00    -0.05       0.00     0.25
  8   0.9665      0.00    -0.01       0.00     0.12
  9   1.3820      0.00     0.13       0.00    -0.23
 10   1.3847      0.00     0.35       0.00    -0.43
 11   4.0353      0.00    -0.12       0.00     0.20
 12   4.0355      0.00    -0.25       0.00    -0.60
 13   6.9731      0.00     0.95       0.00     0.63
 14   6.9733      0.00    -0.63       0.00     0.24
 15   8.4182      0.00    -0.27       0.00    -0.03
 16   8.9310      0.00    -0.02       0.00    -0.29
 17   9.1249      0.00    -0.22       0.00     0.12
 18   9.1275      0.00     0.11       0.00    -0.03
 19   9.1389      0.00    -0.00       0.00    -0.02
 20   9.1389      0.00     0.06       0.00    -0.05
 21   9.1389      0.00     0.04       0.00    -0.05
 22   9.1390      0.00     0.11       0.00     0.00
 23   9.3737      0.00    -0.11       0.00     0.00
 24  10.1274      0.00     0.03       0.00    -0.04
 25  12.2047      0.00     0.18       0.00     0.39
 26  12.2133      0.00     0.15       0.00     0.12
 27  12.2134      0.00     0.33       0.00     0.05
 28  13.0431      0.00     0.09       0.00     0.02
 29  13.0948      0.00    -0.04       0.00     0.03
 30  13.1031      0.00    -0.16       0.00    -0.13
 31  13.1031      0.00     0.21       0.00     0.18
 32  13.1032      0.00     0.12       0.00     0.08
 33  13.1032      0.00     0.26       0.00     0.26
 34  13.1035      0.00    -0.12       0.00     0.03
 35  13.1036      0.00     0.04       0.00    -0.11
 36  13.1036      0.00    -0.02       0.00    -0.01
 37  13.1036      0.00    -0.01       0.00    -0.09
 38  13.1112      0.00     0.02       0.00    -0.05
 39  13.1112      0.00    -0.01       0.00    -0.03
 40  13.1113      0.00     0.06       0.00    -0.06
 41  13.1113      0.00     0.03       0.00     0.00
 42  13.1167      0.00     0.03       0.00    -0.13
 43  13.1168      0.00    -0.09       0.00    -0.25
 44  13.1168      0.00     0.03       0.00    -0.10
 45  13.1168      0.00     0.08       0.00    -0.17
 46  13.1741      0.00    -0.08       0.00     0.07
 47  13.2560      0.00     0.02       0.00     0.19
 48  13.2587      0.00    -0.12       0.00    -0.04
 49  13.2619      0.00     0.00       0.00    -0.11
 50  13.2645      0.00    -0.06       0.00     0.26
 51  13.2645      0.00    -0.08       0.00    -0.07
 52  13.2645      0.00    -0.32       0.00     0.30
 53  13.2646      0.00     0.02       0.00    -0.01
 54  13.9113      0.00    -0.57       0.00     0.69
 55  14.0369      0.00    -0.00       0.00     0.37
 56  14.1051      0.00    -0.14       0.00    -0.06
 57  14.1357      0.00     0.13       0.00    -0.02
 58  14.1489      0.00    -0.24       0.00     0.16
 59  14.1548      0.00     0.10       0.00    -0.09
 60  14.2280      0.00    -0.00       0.00    -0.10
 61  14.3651      0.00    -0.06       0.00     0.14
 62  15.0367      0.00     0.18       0.00     0.08
 63  15.1345      0.00     0.17       0.00     0.21
 64  15.1345      0.00     0.43       0.00    -0.15
 65  15.1346      0.00     0.13       0.00    -0.38
 66  15.1346      0.00     0.09       0.00    -0.02
 67  15.1541      0.00    -0.32       0.00    -0.43
 68  15.1541      0.00    -0.32       0.00    -0.57
 69  15.1542      0.00    -0.49       0.00    -0.42
 70  15.2029      0.00    -0.06       0.00    -0.05
 71  15.2655      0.00     0.09       0.00     0.45
 72  16.0961      0.00     0.13       0.00     0.10
 73  16.1748      0.00     0.16       0.00     0.17
 74  16.1748      0.00    -0.01       0.00     0.09
 75  16.1749      0.00     0.09       0.00     0.07
 76  16.1749      0.00     0.04       0.00    -0.08
 77  16.2403      0.00    -0.26       0.00     0.01
 78  16.2403      0.00     0.12       0.00    -0.23
 79  16.2404      0.00    -0.00       0.00    -0.24
 80  16.2404      0.00     0.00       0.00    -0.01
 81  16.2677      0.00    -0.14       0.00    -0.09

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.

01XQ254    quality flag:3

Type:         5:2EEE    5:2EEE    5:2EEE

axisobj        55.839    55.838    55.839
ecceobj         0.443     0.443     0.443
incobj          7.104     7.104     7.104
qmin           30.587    30.566    30.583
qmax           82.221    82.022    82.114
amean          55.463    55.463    55.463
amin           54.586    54.544    54.586
amax           56.674    56.576    56.614
emean           0.438     0.438     0.438
emin            0.428     0.428     0.428
emax            0.451     0.451     0.450
imean           5.652     5.655     5.653
imin            5.405     5.405     5.405
imax            5.892     5.892     5.892
excite_mean     0.449     0.449     0.449
fracstop        1.000     1.000     1.000
cjmean          2.970     2.970     2.970

libcent 0       179.3     180.3     180.8
libamp  0       134.2     133.0     132.7
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       142.2     143.8     143.4
kozaiamp        179.9     180.0     180.0