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 Nov 17 02:09:12 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   29 observations of   29
# Arc:   9.04y
# First observation: 2005/03/10
#  Last observation: 2014/03/24
# Chi-squared of fit:    52.09 DOF:   52 RMS:  0.24
# Min/Max residuals:    -0.59    0.54
# Exact a, adot, b, bdot, g, gdot:
  1.292601E-05  2.144578E-02  4.669608E-06  6.009004E-03  2.341217E-02 -1.091924E-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:              2453440.5000  =  2005/03/11
Mean Anomaly:          274.82551 +/-     0.082
Argument of Peri:       66.32265 +/-     0.091
Long of Asc Node:      150.63221 +/-     0.000
Inclination:            16.98720 +/-     0.000
Eccentricity:         0.03586418 +/-    0.0001
Semi-Major Axis:     43.52747503 +/-    0.0033
Time of Perihelion: 2478257.5795 +/-      25.5
Perihelion:          41.96639798 +/-    0.0044
Aphelion:            45.08855208 +/-    0.0046
Period (y)              287.1795 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.91701086 +/-    0.0006
Ecliptic Y           33.74946029 +/-    0.0007
Ecliptic Z           -4.95249343 +/-    0.0001
Ecliptic XDOT        -0.00195669 +/-    0.0000
Ecliptic YDOT        -0.00157643 +/-    0.0000
Ecliptic ZDOT         0.00071283 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.45205098 +/-    0.0006
Geocenter to KBO     42.71290895 +/-    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     0.29       0.00    -0.20
  2   0.0000      0.00     0.18       0.00    -0.22
  3   0.7426      0.00    -0.26       0.00     0.29
  4   0.7426      0.00    -0.23       0.00     0.28
  5   0.7426      0.00    -0.29       0.00     0.27
  6   5.9010      0.00    -0.07       0.00    -0.26
  7   5.9037      0.00     0.25       0.00    -0.14
  8   6.9032      0.00     0.04       0.00    -0.40
  9   6.9033      0.00     0.50       0.00    -0.39
 10   6.9549      0.00     0.05       0.00     0.12
 11   7.9047      0.00    -0.02       0.00    -0.02
 12   7.9047      0.00     0.03       0.00    -0.04
 13   7.9048      0.00     0.29       0.00    -0.23
 14   7.9811      0.00    -0.02       0.00    -0.04
 15   7.9811      0.00     0.03       0.00     0.04
 16   7.9812      0.00    -0.10       0.00    -0.15
 17   7.9812      0.00    -0.05       0.00     0.04
 18   8.6583      0.00     0.28       0.00     0.54
 19   8.8249      0.00     0.13       0.00    -0.59
 20   8.8249      0.00     0.16       0.00     0.26
 21   8.8250      0.00    -0.01       0.00    -0.03
 22   8.8795      0.00    -0.22       0.00    -0.16
 23   8.8795      0.00    -0.14       0.00     0.02
 24   8.8795      0.00     0.19       0.00    -0.09
 25   8.9723      0.00    -0.39       0.00     0.21
 26   8.9723      0.00    -0.11       0.00     0.21
 27   8.9724      0.00    -0.02       0.00     0.29
 28   9.0270      0.00    -0.18       0.00     0.10
 29   9.0379      0.00    -0.43       0.00     0.34

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        43.399    43.399    43.399
ecceobj         0.030     0.030     0.030
incobj         17.044    17.044    17.044
qmin           41.383    41.377    41.389
qmax           45.532    45.536    45.529
amean          43.385    43.385    43.385
amin           43.057    43.058    43.056
amax           43.720    43.722    43.713
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    16.143
imin           15.731    15.731    15.727
imax           16.568    16.568    16.568
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       176.5     176.5     176.6
kozaiamp        179.9     180.0     179.9