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 Nov 16 02:07:57 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   14 observations of   14
# Arc:   6.97y
# First observation: 2001/12/10
#  Last observation: 2008/11/30
# Chi-squared of fit:    53.47 DOF:   22 RMS:  0.35
# Min/Max residuals:    -0.71    0.87
# Exact a, adot, b, bdot, g, gdot:
  2.131417E-05  4.327901E-02  1.695841E-06  5.354527E-03  3.266755E-02 -3.606340E-03
# Covariance matrix:
  2.5799E-13 -1.3352E-13  6.1193E-15 -1.1513E-14  8.7113E-14 -3.0415E-13
 -1.3352E-13  2.3932E-13 -1.5425E-14  2.7788E-14  1.1741E-13  7.3128E-13
  6.1193E-15 -1.5425E-14  1.7809E-13 -3.7149E-14 -1.0718E-14 -5.1048E-14
 -1.1513E-14  2.7788E-14 -3.7149E-14  2.0308E-14  1.7497E-14  9.1716E-14
  8.7113E-14  1.1741E-13 -1.0718E-14  1.7497E-14  5.7658E-13  4.5614E-13
 -3.0415E-13  7.3128E-13 -5.1048E-14  9.1716E-14  4.5614E-13  2.4130E-12
#      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:          353.99715 +/-     0.003
Argument of Peri:       10.08734 +/-     0.007
Long of Asc Node:      107.21884 +/-     0.000
Inclination:             7.09642 +/-     0.000
Eccentricity:         0.44724469 +/-    0.0001
Semi-Major Axis:     56.22629927 +/-    0.0108
Time of Perihelion: 2454822.3091 +/-      43.5
Perihelion:          31.07938564 +/-    0.0080
Aphelion:            81.37321289 +/-    0.0165
Period (y)              421.6164 +/-      0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -5.44815077 +/-    0.0001
Ecliptic Y           31.04734287 +/-    0.0007
Ecliptic Z           -0.49632013 +/-    0.0000
Ecliptic XDOT        -0.00351919 +/-    0.0000
Ecliptic YDOT        -0.00095879 +/-    0.0000
Ecliptic ZDOT         0.00045381 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.52570364 +/-    0.0007
Geocenter to KBO     30.61150839 +/-    0.0007
# Hcoef:  7.49

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      

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    -0.07       0.00     0.19
  2   0.0001      0.00     0.14       0.00     0.27
  3   0.0001      0.00    -0.06       0.00     0.26
  4   0.0794      0.00    -0.21       0.00    -0.31
  5   0.0795      0.00    -0.32       0.00    -0.36
  6   0.9662      0.00     0.38       0.00     0.38
  7   0.9663      0.00     0.02       0.00     0.28
  8   0.9665      0.00     0.06       0.00     0.14
  9   1.3820      0.00     0.01       0.00    -0.20
 10   1.3847      0.00     0.23       0.00    -0.41
 11   4.0353      0.00    -0.12       0.00     0.09
 12   4.0355      0.00    -0.26       0.00    -0.71
 13   6.9731      0.00     0.87       0.00     0.38
 14   6.9733      0.00    -0.71       0.00    -0.01

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        55.847    55.847    55.848
ecceobj         0.443     0.443     0.443
incobj          7.105     7.105     7.105
qmin           30.565    30.587    30.591
qmax           81.937    82.001    82.123
amean          55.463    55.463    55.463
amin           54.609    54.601    54.535
amax           56.519    56.554    56.614
emean           0.438     0.438     0.438
emin            0.428     0.427     0.428
emax            0.450     0.450     0.451
imean           5.649     5.657     5.649
imin            5.402     5.407     5.403
imax            5.894     5.902     5.894
excite_mean     0.449     0.449     0.449
fracstop        1.000     1.000     1.000
cjmean          2.970     2.970     2.970

libcent 0       179.4     179.9     179.4
libamp  0       134.3     131.6     133.7
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       143.6     144.9     143.1
kozaiamp        179.9     180.0     180.0