Orbit Fit and Astrometric record for 12CS57

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: 12CS57    
# Created Sat Aug 18 01:37:57 2018
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   29
# Arc:   9.04y
# First observation: 2005/03/10
#  Last observation: 2014/03/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000540   0.022019  -0.000114   0.006160   0.023516   0.000000
# Chi-squared of fit:    52.58 DOF:   52 RMS:  0.24
# Min/Max residuals:    -0.53    0.62
# Exact a, adot, b, bdot, g, gdot:
  1.281458E-05  2.144587E-02  4.660585E-06  6.009019E-03  2.341228E-02 -1.091682E-03
# Covariance matrix:
  5.9910E-13 -1.7398E-13  2.8496E-14 -3.4092E-14 -2.4601E-13 -5.9673E-13
 -1.7398E-13  1.1609E-13 -2.3394E-14  2.8732E-14  7.2016E-14  5.0678E-13
  2.8496E-14 -2.3394E-14  3.1032E-13 -4.3503E-14 -1.4755E-14 -1.0724E-13
 -3.4092E-14  2.8732E-14 -4.3503E-14  1.2925E-14  1.6984E-14  1.3191E-13
 -2.4601E-13  7.2016E-14 -1.4755E-14  1.6984E-14  2.4409E-13  2.9379E-13
 -5.9673E-13  5.0678E-13 -1.0724E-13  1.3191E-13  2.9379E-13  2.3278E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -6.658623  127.692743   -0.660048   -0.085306   -0.731582  2453439.668046
# Heliocentric elements and errors
Epoch:              2453430.5000  =  2005/03/01
Mean Anomaly:          274.78099 +/-     0.082
Argument of Peri:       66.33156 +/-     0.091
Long of Asc Node:      150.63224 +/-     0.000
Inclination:            16.98718 +/-     0.000
Eccentricity:         0.03585290 +/-    0.0001
Semi-Major Axis:     43.52699355 +/-    0.0033
Time of Perihelion: 2478260.1399 +/-      23.6
Perihelion:          41.96642443 +/-    0.0044
Aphelion:            45.08756267 +/-    0.0046
Period (y)              287.1747 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.91688775 +/-    0.0006
Ecliptic Y           33.74930876 +/-    0.0007
Ecliptic Z           -4.95247103 +/-    0.0001
Ecliptic XDOT        -0.00195671 +/-    0.0000
Ecliptic YDOT        -0.00157640 +/-    0.0000
Ecliptic ZDOT         0.00071283 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.45183146 +/-    0.0006
Geocenter to KBO     42.71263164 +/-    0.0009
# Hcoef:  6.21

The following table shows the complete astrometric record for 12CS57. 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 (12CS57) followed by the observatory code and reference code for the source of the astrometry.

2005 03  10.167303 08 33 27.22   +11 54 10.3         12CS57    645  C~2VVI      
2005 03  10.168132 08 33 27.21   +11 54 10.3         12CS57    645  C~2VVI      
2005 12  06.386505 08 45 01.32   +11 26 53.1         12CS57    645  C~2VVI      
2005 12  06.387334 08 45 01.32   +11 26 53.1         12CS57    645  C~2VVI      
2005 12  06.389822 08 45 01.31   +11 26 53.1         12CS57    645  C~2VVI      
2011 02  02.49885  09 07 31.022  +11 42 55.43  23.3w 12CS57    F51  C~1w3p      
2011 02  03.49389  09 07 26.386  +11 43 19.81  23.2w 12CS57    F51  C~1w3p      
2012 02  03.54852  09 12 44.944  +11 42 25.44  22.3i 12CS57    F51  C~1w3p      
2012 02  03.58203  09 12 44.816  +11 42 26.27  22.7r 12CS57    F51  C~1w3p      
2012 02  22.42769  09 11 18.265  +11 50 25.81  23.0w 12CS57    F51  C~1w3p      
2013 02  03.34659  09 18 00.927  +11 41 26.10  22.5w 12CS57    F51  C~1w3p      
2013 02  03.36121  09 18 00.861  +11 41 26.45  22.3w 12CS57    F51  C~1w3p      
2013 02  03.39055  09 18 00.740  +11 41 27.00  22.6w 12CS57    F51  C~1w3p      
2013 03  03.26444  09 15 55.630  +11 53 24.25  22.4w 12CS57    F51  C~1w3p      
2013 03  03.27877  09 15 55.574  +11 53 24.69  22.6w 12CS57    F51  C~1w3p      
2013 03  03.29314  09 15 55.505  +11 53 24.86  22.6w 12CS57    F51  C~1w3p      
2013 03  03.30748  09 15 55.449  +11 53 25.42  22.9w 12CS57    F51  C~1w3p      
2013 11  05.61658  09 26 47.154  +11 23 07.41  22.4w 12CS57    F51  C~1w3p      
2014 01  05.45176  09 25 24.953  +11 28 52.05  22.1w 12CS57    F51  C~1w3p      
2014 01  05.46693  09 25 24.898  +11 28 53.18  22.0w 12CS57    F51  C~1w3p      
2014 01  05.48210  09 25 24.829  +11 28 53.17  22.4w 12CS57    F51  C~1w3p      
2014 01  25.39372  09 24 02.315  +11 36 00.43  22.4w 12CS57    F51  C~1w3p      
2014 01  25.40528  09 24 02.268  +11 36 00.88  22.4w 12CS57    F51  C~1w3p      
2014 01  25.41679  09 24 02.237  +11 36 01.05  22.5w 12CS57    F51  C~1w3p      
2014 02  28.30193  09 21 28.001  +11 50 33.82  22.5w 12CS57    F51  C~1w3p      
2014 02  28.31491  09 21 27.963  +11 50 34.15  22.5w 12CS57    F51  C~1w3p      
2014 02  28.34114  09 21 27.855  +11 50 34.91  22.5w 12CS57    F51  C~1w3p      
2014 03  20.27162  09 20 11.945  +11 58 41.78  22.8w 12CS57    F51  C~1w3p      
2014 03  24.26564  09 19 59.449  +12 00 09.98  22.3w 12CS57    F51  C~1w3p      

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     0.34       0.00    -0.12
  2   0.0000     -0.14     0.25      -0.04    -0.17
  3   0.7426  10286.55    -0.34    1002.17     0.21
  4   0.7426  10286.55    -0.31    1002.17     0.21
  5   0.7426  10286.41    -0.36    1002.13     0.19
  6   5.9010  29333.00    -0.00    7302.14    -0.27
  7   5.9037  29259.33     0.27    7306.51    -0.07
  8   6.9032  33878.83     0.15    8595.15    -0.38
  9   6.9033  33876.73     0.59    8595.41    -0.24
 10   6.9549  32486.25     0.02    8694.08     0.13
 11   7.9047  38492.01    -0.01    9899.29    -0.03
 12   7.9047  38490.94     0.04    9899.34    -0.03
 13   7.9048  38489.01     0.36    9899.35    -0.14
 14   7.9811  36457.07    -0.00   10055.10    -0.04
 15   7.9811  36456.13     0.03   10055.28     0.05
 16   7.9812  36455.08    -0.05   10055.15    -0.18
 17   7.9812  36454.10    -0.05   10055.46     0.03
 18   8.6583  46556.80     0.11   11163.95     0.62
 19   8.8249  45236.15     0.31   11130.41    -0.53
 20   8.8249  45234.99     0.08   11131.27     0.31
 21   8.8250  45233.98    -0.00   11130.95    -0.03
 22   8.8795  43887.86    -0.17   11178.64    -0.22
 23   8.8795  43887.03    -0.13   11178.87    -0.02
 24   8.8795  43886.52     0.22   11178.90    -0.03
 25   8.9723  41359.29    -0.43   11344.85     0.10
 26   8.9723  41358.63    -0.15   11345.00     0.17
 27   8.9724  41356.82    -0.09   11345.27     0.28
 28   9.0270  40101.29    -0.19   11484.94     0.04
 29   9.0379  39892.56    -0.50   11515.92     0.21

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.

12CS57    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.396    43.405    43.386
ecceobj         0.030     0.030     0.030
incobj         17.045    17.045    17.045
qmin           41.386    41.394    41.370
qmax           45.531    45.570    45.549
amean          43.382    43.392    43.373
amin           43.066    43.059    43.044
amax           43.704    43.732    43.709
emean           0.031     0.031     0.031
emin            0.020     0.020     0.020
emax            0.042     0.042     0.042
imean          16.143    16.143    16.144
imin           15.725    15.725    15.729
imax           16.571    16.563    16.569
excite_mean     0.280     0.280     0.280
fracstop        1.000     1.000     1.000
cjmean          2.999     2.999     2.999

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       177.0     177.0     177.0
kozaiamp        180.0     180.0     179.9