Orbit Fit and Astrometric record for 01XX254

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: 01XX254   
# Created Tue Oct 24 01:37:15 2017
# Orbit generated from Bernstein formalism
# Fitting   13 observations of   14
# Arc:  13.19y
# First observation: 2001/12/11
#  Last observation: 2015/02/18
Preliminary a, adot, b, bdot, g, gdot:
  -0.000238   0.022854  -0.000007   0.000652   0.023552   0.000000
# Chi-squared of fit:     5.77 DOF:   20 RMS:  0.12
# Min/Max residuals:    -0.28    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.542800E-05  2.228699E-02  1.513584E-06  6.337629E-04  2.338891E-02 -3.790800E-04
# Covariance matrix:
  2.2245E-13 -5.7181E-14  6.3932E-16 -1.4892E-15  7.8497E-14 -1.8036E-13
 -5.7181E-14  2.0273E-13 -1.6456E-15  6.0252E-15  9.6639E-14  7.2107E-13
  6.3932E-16 -1.6456E-15  1.9298E-13 -1.5965E-14  6.0947E-16 -6.3901E-15
 -1.4892E-15  6.0252E-15 -1.5965E-14  3.2482E-15  1.7703E-15  2.2123E-14
  7.8497E-14  9.6639E-14  6.0947E-16  1.7703E-15  5.0948E-13  2.0177E-13
 -1.8036E-13  7.2107E-13 -6.3901E-15  2.2123E-14  2.0177E-13  2.6508E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.639602  107.254605    0.456872    0.009588   -0.865698  2452254.904443
# Heliocentric elements and errors
Epoch:              2452250.5000  =  2001/12/07
Mean Anomaly:          293.81311 +/-     0.172
Argument of Peri:       90.20641 +/-     0.186
Long of Asc Node:       85.67348 +/-     0.002
Inclination:             1.75056 +/-     0.000
Eccentricity:         0.02866805 +/-    0.0001
Semi-Major Axis:     44.10824827 +/-    0.0051
Time of Perihelion: 2471922.4578 +/-      50.9
Perihelion:          42.84375076 +/-    0.0058
Aphelion:            45.37274579 +/-    0.0061
Period (y)              292.9462 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -12.50061874 +/-    0.0004
Ecliptic Y           41.79630977 +/-    0.0012
Ecliptic Z            0.47732989 +/-    0.0000
Ecliptic XDOT        -0.00248663 +/-    0.0000
Ecliptic YDOT        -0.00081705 +/-    0.0000
Ecliptic ZDOT         0.00007390 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.62825716 +/-    0.0012
Geocenter to KBO     42.75530603 +/-    0.0013
# Hcoef:  7.31

The following table shows the complete astrometric record for 01XX254. 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 (01XX254) followed by the observatory code and reference code for the source of the astrometry.

2001 12  11.40370  07 15 09.88   +22 57 37.2         01XX254   568  Ce7056      
2001 12  11.42722  07 15 09.79   +22 57 37.7         01XX254   568  Ce7056      
2001 12  11.45024  07 15 09.68   +22 57 37.9         01XX254   568  Ce7056      
2002 01  09.46883  07 12 46.17   +23 02 06.4         01XX254   568  Ce7056      
2002 01  09.49446  07 12 46.02   +23 02 06.8   23.5R 01XX254   568  Ce7056      
2002 04  06.15033  07 08 36.12   +23 08 44.9         01XX254   696  Cf5236      
2002 04  06.21341  07 08 36.16   +23 08 44.4         01XX254   696  Cf5236      
2002 11  02.53348  07 22 38.54   +22 45 06.5   23.6R 01XX254   568  Cg5849      
2002 11  03.52438  07 22 37.22   +22 45 10.2         01XX254   568  Cg5849      
2013 03  12.12103  08 08 47.06   +21 11 39.6   23.5R 01XX254   G37  C~0qSR      
2013 03  12.26300  08 08 46.65   +21 11 40.7         01XX254   G37  C~0qSR      
2015 02  18.15977  08 21 02.49   +20 36 58.1   22.9R 01XX254   695  C~1M62      
2015 02  18.20668  08 21 02.29   +20 36 58.7         01XX254   695  C~1M62      
2015 02  18.25255  08 21 02.09   +20 36 59.3         01XX254   695  C~1M62      

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    -0.22
  2   0.0001     -1.30     0.11       0.34     0.09
  3   0.0001     -2.83     0.04       0.34     0.07
  4   0.0796  -2002.49     0.04      16.80     0.06
  5   0.0796  -2004.59    -0.19      16.94     0.20
  6   0.3169  -5476.85 (   0.13)     -3.56 (   0.55)
  7   0.3171  -5476.24     0.06      -3.99     0.18
  8   0.8929   6247.98    -0.02      89.82    -0.15
  9   0.8956   6229.37     0.03      90.92    -0.28
 10  11.2491  45863.75     0.00    1470.92     0.08
 11  11.2494  45857.62    -0.01    1470.75     0.10
 12  13.1876  57029.43    -0.15    1774.62    -0.00
 13  13.1877  57026.34     0.03    1774.54    -0.04
 14  13.1878  57023.25     0.13    1774.46    -0.08

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.

01XX254    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.928    43.943    43.913
ecceobj         0.025     0.025     0.025
incobj          1.750     1.750     1.750
qmin           41.826    41.850    41.806
qmax           46.003    46.025    45.999
amean          43.822    43.837    43.807
amin           43.485    43.503    43.473
amax           44.169    44.184    44.150
emean           0.026     0.026     0.026
emin            0.009     0.009     0.009
emax            0.042     0.042     0.042
imean           0.654     0.651     0.657
imin            0.564     0.560     0.569
imax            0.761     0.759     0.762
excite_mean     0.029     0.029     0.028
fracstop        1.000     1.000     1.000
cjmean          3.098     3.099     3.098

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       180.8     180.1     181.6
kozaiamp        180.0     179.9     179.9