Orbit Fit and Astrometric record for 14AL55

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: 14AL55    
# Created Thu Oct 19 01:38:19 2017
# Orbit generated from Bernstein formalism
# Fitting   45 observations of   45
# Arc:   6.05y
# First observation: 2011/01/30
#  Last observation: 2017/02/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.001318   0.031805  -0.000097   0.002342   0.029818   0.000000
# Chi-squared of fit:    46.14 DOF:   84 RMS:  0.18
# Min/Max residuals:    -0.73    0.46
# Exact a, adot, b, bdot, g, gdot:
  1.809395E-05  3.065026E-02  1.846631E-06  2.258975E-03  2.801317E-02 -6.141524E-03
# Covariance matrix:
  2.8862E-13 -1.4648E-13  6.9851E-15 -7.1867E-15 -6.6200E-14 -5.5181E-13
 -1.4648E-13  1.1582E-13 -7.2727E-15  7.4830E-15  6.9166E-14  5.7454E-13
  6.9851E-15 -7.2727E-15  1.9620E-13 -5.0231E-14 -4.2726E-15 -4.1748E-14
 -7.1867E-15  7.4830E-15 -5.0231E-14  1.5581E-14  4.6200E-15  4.2864E-14
 -6.6200E-14  6.9166E-14 -4.2726E-15  4.6200E-15  1.8570E-13  3.3757E-13
 -5.5181E-13  5.7454E-13 -4.1748E-14  4.2864E-14  3.3757E-13  3.2981E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.032745  117.717991   -0.210858    0.017405   -0.965247  2455591.795376
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:          321.35568 +/-     0.007
Argument of Peri:       74.54629 +/-     0.011
Long of Asc Node:      104.60240 +/-     0.001
Inclination:             4.31882 +/-     0.000
Eccentricity:         0.24564673 +/-    0.0001
Semi-Major Axis:     43.65156494 +/-    0.0034
Time of Perihelion: 2466898.3838 +/-       1.5
Perihelion:          32.92870059 +/-    0.0039
Aphelion:            54.37442929 +/-    0.0052
Period (y)              288.4084 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -17.23303817 +/-    0.0003
Ecliptic Y           32.35170358 +/-    0.0005
Ecliptic Z            0.64345088 +/-    0.0000
Ecliptic XDOT        -0.00237192 +/-    0.0000
Ecliptic YDOT        -0.00192201 +/-    0.0000
Ecliptic ZDOT         0.00020994 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.66093777 +/-    0.0004
Geocenter to KBO     35.69749449 +/-    0.0005
# Hcoef:  6.55

The following table shows the complete astrometric record for 14AL55. 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 (14AL55) followed by the observatory code and reference code for the source of the astrometry.

2011 01  30.29461  08 00 04.314  +21 37 47.84  22.4w 14AL55    F51  C~1vXA      
2011 01  30.30913  08 00 04.245  +21 37 48.07  22.4w 14AL55    F51  C~1vXA      
2011 01  30.32420  08 00 04.157  +21 37 48.31  22.1w 14AL55    F51  C~1vXA      
2011 01  30.33857  08 00 04.066  +21 37 48.57  22.3w 14AL55    F51  C~1vXA      
2012 01  26.50190  08 08 00.738  +21 22 28.17  21.7i 14AL55    F51  C~1vXA      
2012 01  26.51481  08 08 00.645  +21 22 28.62  21.6i 14AL55    F51  C~1vXA      
2012 01  26.53988  08 08 00.513  +21 22 29.07  21.7r 14AL55    F51  C~1vXA      
2014 01  01.41109  08 25 39.336  +20 41 06.39  22.2w 14AL55    F51  C~1vXA      
2014 01  01.42492  08 25 39.282  +20 41 06.79  22.0w 14AL55    F51  C~1vXA      
2014 01  01.43877  08 25 39.203  +20 41 06.84  22.4w 14AL55    F51  C~1vXB      
2014 01  01.45276  08 25 39.125  +20 41 07.27  22.1w 14AL55    F51  C~1vXB      
2014 02  23.25971  08 20 44.766  +20 58 35.23  21.8w 14AL55    F51  C~1vXB      
2014 02  23.28482  08 20 44.624  +20 58 35.45  21.8w 14AL55    F51  C~1vXB      
2014 02  23.29747  08 20 44.568  +20 58 35.50  22.0w 14AL55    F51  C~1vXB      
2014 02  26.39897  08 20 29.928  +20 59 24.04  22.4w 14AL55    F51  C~1vXB      
2014 02  26.41202  08 20 29.867  +20 59 24.11  22.6w 14AL55    F51  C~1vXB      
2014 02  26.42502  08 20 29.778  +20 59 23.94  22.3w 14AL55    F51  C~1vXB      
2014 02  26.43804  08 20 29.741  +20 59 24.35  22.1w 14AL55    F51  C~1vXB      
2014 03  06.40273  08 19 55.470  +21 01 14.77  22.3w 14AL55    F51  C~1vXB      
2014 03  06.41576  08 19 55.409  +21 01 14.67  22.4w 14AL55    F51  C~1vXB      
2014 03  06.42883  08 19 55.394  +21 01 15.04  22.0w 14AL55    F51  C~1vXB      
2014 03  06.44191  08 19 55.302  +21 01 15.46  22.3w 14AL55    F51  C~1vXB      
2014 12  21.59272  08 34 16.469  +20 18 23.76  22.2w 14AL55    F51  C~1vXB      
2014 12  21.60628  08 34 16.413  +20 18 23.87  22.2w 14AL55    F51  C~1vXB      
2014 12  21.62002  08 34 16.346  +20 18 24.31  22.4w 14AL55    F51  C~1vXB      
2014 12  21.63381  08 34 16.271  +20 18 24.47  22.1w 14AL55    F51  C~1vXB      
2015 01  14.37428  08 32 13.927  +20 26 41.08  22.1w 14AL55    F51  C~1vXB      
2015 01  14.38661  08 32 13.851  +20 26 41.45  21.9w 14AL55    F51  C~1vXB      
2015 01  14.39884  08 32 13.782  +20 26 41.64  22.2w 14AL55    F51  C~1vXB      
2015 01  14.41107  08 32 13.698  +20 26 41.90  22.4w 14AL55    F51  C~1vXB      
2015 02  17.28490  08 29 00.122  +20 38 39.01  21.9w 14AL55    F51  C~1vXB      
2015 02  17.29729  08 29 00.051  +20 38 39.23  22.0w 14AL55    F51  C~1vXB      
2015 02  17.30963  08 28 59.991  +20 38 39.67  22.1w 14AL55    F51  C~1vXB      
2015 02  17.32207  08 28 59.917  +20 38 39.69  21.7w 14AL55    F51  C~1vXB      
2015 03  16.37090  08 27 01.512  +20 45 19.55  22.1w 14AL55    F51  C~1vXB      
2015 03  16.38321  08 27 01.475  +20 45 19.75  22.1w 14AL55    F51  C~1vXB      
2015 03  16.39549  08 27 01.419  +20 45 19.99  22.1w 14AL55    F51  C~1vXB      
2015 03  16.40769  08 27 01.379  +20 45 19.90  22.0w 14AL55    F51  C~1vXB      
2015 04  10.29948  08 26 12.893  +20 47 37.59  22.3w 14AL55    F51  C~1vXB      
2015 04  10.31129  08 26 12.885  +20 47 37.60  22.2w 14AL55    F51  C~1vXB      
2015 04  10.32306  08 26 12.874  +20 47 37.56  22.1w 14AL55    F51  C~1vXB      
2015 04  10.33489  08 26 12.871  +20 47 37.60  22.1w 14AL55    F51  C~1vXB      
2017 02  16.202214 08 44 41.27   +19 57 29.3   22.2V 14AL55    H21  C~27xm      
2017 02  16.215825 08 44 41.18   +19 57 29.9   22.2V 14AL55    H21  C~27xm      
2017 02  16.232683 08 44 41.05   +19 57 30.7   22.5V 14AL55    H21  C~27xm      

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    -0.16       0.00    -0.12
  2   0.0000     -0.99     0.05       0.03    -0.10
  3   0.0001     -2.24     0.05       0.02    -0.12
  4   0.0001     -3.53    -0.06       0.03    -0.13
  5   0.9889   6698.51     0.22     464.86    -0.28
  6   0.9890   6697.14    -0.05     465.02    -0.13
  7   0.9890   6695.24     0.17     465.07    -0.09
  8   2.9216  21775.92    -0.06    1386.70    -0.07
  9   2.9216  21775.08     0.19    1386.91     0.11
 10   2.9217  21773.98     0.18    1386.69    -0.13
 11   2.9217  21772.80     0.10    1386.85    -0.00
 12   3.0663  17476.59     0.09    1435.72     0.13
 13   3.0664  17474.59    -0.12    1435.48    -0.11
 14   3.0664  17473.81     0.00    1435.34    -0.24
 15   3.0749  17261.61     0.01    1435.17     0.33
 16   3.0749  17260.75     0.05    1435.04     0.21
 17   3.0750  17259.57    -0.25    1434.59    -0.24
 18   3.0750  17258.97     0.03    1434.87     0.05
 19   3.0968  16763.17    -0.13    1431.68     0.15
 20   3.0968  16762.36    -0.18    1431.38    -0.13
 21   3.0969  16762.07     0.29    1431.69     0.20
 22   3.0969  16760.71    -0.30    1431.81     0.32
 23   3.8913  29268.49    -0.04    1851.30     0.13
 24   3.8913  29267.68     0.07    1851.21     0.01
 25   3.8914  29266.64    -0.05    1851.40     0.17
 26   3.8914  29265.56    -0.20    1851.29     0.03
 27   3.9564  27441.85     0.02    1902.02     0.01
 28   3.9564  27440.70    -0.07    1902.11     0.08
 29   3.9565  27439.70    -0.02    1902.05     0.01
 30   3.9565  27438.47    -0.20    1902.01    -0.05
 31   4.0493  24581.79     0.04    1927.27     0.11
 32   4.0493  24580.76    -0.02    1927.23     0.09
 33   4.0493  24579.82     0.02    1927.46     0.31
 34   4.0494  24578.80    -0.02    1927.22     0.08
 35   4.1234  22847.32     0.04    1912.11     0.03
 36   4.1234  22846.76     0.08    1912.18     0.12
 37   4.1235  22845.93    -0.15    1912.23     0.18
 38   4.1235  22845.40    -0.09    1912.00    -0.02
 39   4.1917  22143.94     0.08    1881.99     0.14
 40   4.1917  22143.82     0.08    1881.97     0.14
 41   4.1917  22143.68     0.04    1881.89     0.09
 42   4.1918  22143.63     0.10    1881.92     0.14
 43   6.0477  38332.48     0.46    2939.93    -0.73
 44   6.0477  38331.05     0.18    2940.18    -0.48
 45   6.0477  38329.00    -0.45    2940.46    -0.18

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.

14AL55    quality flag:3

Type:         7:4EEE    7:4EEE    7:4EEE

axisobj        43.845    43.855    43.836
ecceobj         0.246     0.246     0.246
incobj          4.315     4.315     4.315
qmin           32.302    32.303    32.300
qmax           55.677    55.643    55.678
amean          43.726    43.726    43.726
amin           43.303    43.290    43.299
amax           44.231    44.253    44.244
emean           0.227     0.225     0.228
emin            0.181     0.172     0.185
emax            0.260     0.259     0.260
imean           5.849     5.981     5.759
imin            2.485     2.477     2.491
imax            9.249    10.147     8.862
excite_mean     0.253     0.253     0.253
fracstop        1.000     1.000     1.000
cjmean          3.021     3.021     3.021

libcent 0       181.9     181.0     182.0
libamp  0        54.2      60.0      52.2
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        95.9      84.8      96.8
kozaiamp        180.0     180.0     180.0