Orbit Fit and Astrometric record for 01XR254

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: 01XR254   
# Created Mon Dec 18 02:37:09 2017
# Orbit generated from Bernstein formalism
# Fitting   50 observations of   50
# Arc:  14.26y
# First observation: 2001/12/10
#  Last observation: 2016/03/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000977   0.021625   0.000003   0.000094   0.021236   0.000000
# Chi-squared of fit:   331.06 DOF:   94 RMS:  0.45
# Min/Max residuals:    -1.24    0.74
# Exact a, adot, b, bdot, g, gdot:
  1.690578E-05  2.148301E-02  7.449201E-07  9.242665E-05  2.307633E-02 -1.178004E-04
# Covariance matrix:
  1.3183E-13 -3.7239E-14  1.2026E-16 -1.5987E-16  2.3345E-14 -1.1039E-13
 -3.7239E-14  1.6948E-14 -8.1368E-17  9.2057E-17 -1.1354E-14  6.4657E-14
  1.2026E-16 -8.1368E-17  9.1201E-14 -1.3418E-14 -3.1613E-16 -3.1476E-16
 -1.5987E-16  9.2057E-17 -1.3418E-14  2.9155E-15 -1.5163E-16  4.3629E-16
  2.3345E-14 -1.1354E-14 -3.1613E-16 -1.5163E-16  9.6267E-14 -6.6023E-14
 -1.1039E-13  6.4657E-14 -3.1476E-16  4.3629E-16 -6.6023E-14  3.0006E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.236124  101.319162    0.378228   -0.019559   -0.902745  2452254.078693
# Heliocentric elements and errors
Epoch:              2452250.5000  =  2001/12/07
Mean Anomaly:          211.90902 +/-     0.047
Argument of Peri:       70.86119 +/-     0.044
Long of Asc Node:      179.57023 +/-     0.006
Inclination:             1.23441 +/-     0.000
Eccentricity:         0.02592921 +/-    0.0000
Semi-Major Axis:     43.28351507 +/-    0.0024
Time of Perihelion: 2495037.1544 +/-      13.1
Perihelion:          42.16120785 +/-    0.0031
Aphelion:            44.40582230 +/-    0.0032
Period (y)              284.7685 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -8.30880140 +/-    0.0001
Ecliptic Y           43.44674016 +/-    0.0006
Ecliptic Z           -0.93481756 +/-    0.0000
Ecliptic XDOT        -0.00250513 +/-    0.0000
Ecliptic YDOT        -0.00051378 +/-    0.0000
Ecliptic ZDOT         0.00001148 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.24397468 +/-    0.0006
Geocenter to KBO     43.33444338 +/-    0.0006
# Hcoef:  5.80

The following table shows the complete astrometric record for 01XR254. 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 (01XR254) followed by the observatory code and reference code for the source of the astrometry.

2001 12  10.57795  06 48 46.70   +21 43 31.0         01XR254   568  Ce7056      
2001 12  10.60115  06 48 46.60   +21 43 31.0         01XR254   568  Ce7056      
2001 12  10.62681  06 48 46.46   +21 43 31.1         01XR254   568  Ce7056      
2002 01  08.52922  06 46 22.74   +21 46 10.5   21.6R 01XR254   568  Ce7056      
2002 01  08.55399  06 46 22.62   +21 46 10.6   21.6R 01XR254   568  Ce7056      
2002 02  07.37434  06 44 06.58   +21 49 00.5   21.7R 01XR254   568  Cf2430      
2002 02  07.41451  06 44 06.42   +21 49 00.7         01XR254   568  Cf2430      
2002 03  12.34701  06 42 43.51   +21 51 14.7   21.7R 01XR254   568  Cf2430      
2002 03  13.30124  06 42 42.54   +21 51 17.6   21.8R 01XR254   568  Cf2430      
2002 10  31.48763  06 56 17.35   +21 35 07.5   21.9R 01XR254   568  Cg5849      
2002 11  01.51091  06 56 15.60   +21 35 08.3   21.8R 01XR254   568  Cg5849      
2002 11  05.54752  06 56 07.73   +21 35 13.3   21.7R 01XR254   568  Cl8351      
2002 11  06.54390  06 56 05.56   +21 35 14.5         01XR254   568  Cl8351      
2002 11  06.61618  06 56 05.39   +21 35 14.7         01XR254   568  Cl8351      
2005 12  23.39350  07 08 54.85   +21 16 24.7   22.0R 01XR254   568  Cp7668      
2005 12  23.44723  07 08 54.54   +21 16 24.8         01XR254   568  Cp7668      
2006 12  20.27161  07 14 26.79   +21 07 22.4   22.2R 01XR254   250  S~06AS      
2006 12  20.27601  07 14 26.77   +21 07 22.4         01XR254   250  S~06AS      
2006 12  20.28040  07 14 26.75   +21 07 22.4         01XR254   250  S~06AS      
2006 12  20.28480  07 14 26.73   +21 07 22.5         01XR254   250  S~06AS      
2007 02  15.16792  07 09 58.69   +21 15 28.0         01XR254   688  Cu2303      
2007 02  15.26559  07 09 58.31   +21 15 28.7         01XR254   688  Cu2303      
2007 09  17.43098  07 21 31.29   +20 56 38.9   22.8R 01XR254   250  S~06AS      
2007 09  17.43862  07 21 31.31   +20 56 38.9         01XR254   250  S~06AS      
2007 09  17.49348  07 21 31.48   +20 56 38.5         01XR254   250  S~06AS      
2007 09  17.50112  07 21 31.50   +20 56 38.4         01XR254   250  S~06AS      
2007 09  18.09210  07 21 33.31   +20 56 34.0         01XR254   250  S~06AS      
2007 09  18.09973  07 21 33.34   +20 56 34.0         01XR254   250  S~06AS      
2007 09  18.10807  07 21 33.36   +20 56 33.9         01XR254   250  S~06AS      
2007 09  18.11571  07 21 33.39   +20 56 33.8         01XR254   250  S~06AS      
2007 09  21.29973  07 21 42.62   +20 56 11.2         01XR254   250  S~06AS      
2007 09  21.30737  07 21 42.64   +20 56 11.1         01XR254   250  S~06AS      
2007 09  21.31501  07 21 42.66   +20 56 11.1         01XR254   250  S~06AS      
2007 09  21.35529  07 21 42.78   +20 56 10.8         01XR254   250  S~06AS      
2007 12  05.35518  07 20 47.36   +20 56 12.0         01XR254   250  S~06AS      
2007 12  05.36143  07 20 47.34   +20 56 12.1         01XR254   250  S~06AS      
2007 12  05.37601  07 20 47.28   +20 56 12.2         01XR254   250  S~06AS      
2007 12  05.42115  07 20 47.10   +20 56 12.5         01XR254   250  S~06AS      
2007 12  05.43087  07 20 47.06   +20 56 12.6         01XR254   250  S~06AS      
2007 12  05.43990  07 20 47.03   +20 56 12.6         01XR254   250  S~06AS      
2007 12  05.44754  07 20 47.00   +20 56 12.7         01XR254   250  S~06AS      
2007 12  05.48643  07 20 46.85   +20 56 12.9         01XR254   250  S~06AS      
2007 12  28.59696  07 19 02.71   +20 59 19.1         01XR254   250  S~06AS      
2007 12  28.60529  07 19 02.66   +20 59 19.1         01XR254   250  S~06AS      
2007 12  28.61293  07 19 02.63   +20 59 19.2         01XR254   250  S~06AS      
2007 12  28.62057  07 19 02.59   +20 59 19.3         01XR254   250  S~06AS      
2009 02  26.13664  07 19 47.03   +20 59 00.4   22.4R 01XR254   688  C~04pJ      
2009 02  26.23481  07 19 46.73   +20 59 01.0         01XR254   688  C~04pJ      
2016 03  13.14435  07 55 27.38   +19 40 12.9   22.3R 01XR254   G37  C~1pPc      
2016 03  13.24127  07 55 27.14   +19 40 13.7         01XR254   G37  C~1pPc      

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    -0.45       0.00    -0.14
  2   0.0001     -1.39    -0.32      -0.12    -0.24
  3   0.0001     -3.34    -0.58      -0.18    -0.27
  4   0.0793  -2012.09    -0.35      -5.73    -0.35
  5   0.0793  -2013.77    -0.26      -5.76    -0.38
  6   0.1610  -3916.42    -0.12      15.17    -0.48
  7   0.1611  -3918.66    -0.17      15.20    -0.48
  8   0.2512  -5080.45     0.29      61.81    -1.09
  9   0.2539  -5094.14     0.07      63.70    -0.81
 10   0.8896   6304.39     0.45      64.47     0.02
 11   0.8924   6279.99     0.57      62.92    -0.02
 12   0.9034   6170.15     0.55      57.37     0.27
 13   0.9061   6139.88     0.56      55.66    -0.02
 14   0.9063   6137.49     0.51      55.63     0.06
 15   4.0351  16976.82    -0.10      70.60    -0.49
 16   4.0352  16972.48    -0.67      70.20    -0.88
 17   5.0259  21691.78     0.27      91.52     0.64
 18   5.0259  21691.50     0.29      91.49     0.60
 19   5.0259  21691.22     0.30      91.45     0.57
 20   5.0259  21690.92     0.30      91.52     0.64
 21   5.1816  17876.10     0.46     118.84    -0.64
 22   5.1819  17870.70     0.29     118.91    -0.68
 23   5.7682  27754.44     0.11     229.06     0.68
 24   5.7683  27754.72     0.05     229.10     0.73
 25   5.7684  27757.18     0.05     229.03     0.74
 26   5.7684  27757.48     0.01     228.96     0.69
 27   5.7701  27783.66    -0.03     228.04     0.66
 28   5.7701  27784.09     0.06     228.10     0.73
 29   5.7701  27784.38    -0.01     228.04     0.69
 30   5.7701  27784.82     0.09     228.00     0.65
 31   5.7788  27918.39    -0.05     223.15     0.70
 32   5.7789  27918.69    -0.06     223.09     0.65
 33   5.7789  27918.97    -0.08     223.13     0.70
 34   5.7790  27920.71     0.05     223.06     0.69
 35   5.9843  27137.56    -0.17     118.20    -0.14
 36   5.9843  27137.26    -0.11     118.26    -0.07
 37   5.9844  27136.40    -0.15     118.25    -0.07
 38   5.9845  27133.82    -0.19     118.21    -0.08
 39   5.9845  27133.24    -0.22     118.23    -0.05
 40   5.9846  27132.82    -0.13     118.17    -0.10
 41   5.9846  27132.38    -0.14     118.22    -0.05
 42   5.9847  27130.23    -0.09     118.13    -0.10
 43   6.0480  25635.66    -0.37     108.16     0.18
 44   6.0480  25634.95    -0.49     108.06     0.09
 45   6.0480  25634.52    -0.39     108.11     0.13
 46   6.0480  25633.94    -0.42     108.13     0.16
 47   7.2130  26263.15     0.30     172.39    -0.64
 48   7.2133  26258.83     0.36     172.42    -0.74
 49  14.2548  58056.69     0.08     335.28    -1.24
 50  14.2551  58052.94     0.09     335.44    -1.21

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.

01XR254    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.138    43.145    43.131
ecceobj         0.028     0.028     0.028
incobj          1.235     1.235     1.235
qmin           41.014    41.023    41.010
qmax           45.181    45.169    45.140
amean          43.006    43.013    42.999
amin           42.681    42.681    42.674
amax           43.340    43.346    43.333
emean           0.024     0.024     0.024
emin            0.005     0.005     0.005
emax            0.043     0.042     0.042
imean           2.661     2.656     2.667
imin            1.606     1.605     1.605
imax            3.403     3.396     3.410
excite_mean     0.053     0.053     0.054
fracstop        1.000     1.000     1.000
cjmean          3.086     3.086     3.086

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       176.1     176.3     175.8
kozaiamp        180.0     180.0     179.9