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 Oct 21 01:37:59 2017
# Orbit generated from Bernstein formalism
# Fitting   23 observations of   24
# Arc:   3.14y
# First observation: 2011/02/02
#  Last observation: 2014/03/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000011   0.021717   0.000002   0.006404   0.023790   0.000000
# Chi-squared of fit:    19.88 DOF:   40 RMS:  0.16
# Min/Max residuals:    -0.53    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.538193E-05  2.169314E-02  4.364471E-06  6.401475E-03  2.365816E-02 -7.404019E-04
# Covariance matrix:
  6.2294E-13 -6.3062E-13  7.8210E-14 -1.4548E-13 -4.2006E-13 -6.5249E-12
 -6.3062E-13  1.1046E-12 -1.6815E-13  3.1275E-13  1.0175E-12  1.4041E-11
  7.8210E-14 -1.6815E-13  4.2217E-13 -2.0136E-13 -1.6235E-13 -2.2798E-12
 -1.4548E-13  3.1275E-13 -2.0136E-13  1.6293E-13  3.0183E-13  4.2404E-12
 -4.2006E-13  1.0175E-12 -1.6235E-13  3.0183E-13  1.4650E-12  1.3613E-11
 -6.5249E-12  1.4041E-11 -2.2798E-12  4.2404E-12  1.3613E-11  1.9035E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.584923  135.807671    0.043512   -0.078965   -0.984642  2455594.999616
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:          271.34669 +/-     0.213
Argument of Peri:       76.77908 +/-     0.191
Long of Asc Node:      150.54777 +/-     0.000
Inclination:            17.05301 +/-     0.001
Eccentricity:         0.03133373 +/-    0.0006
Semi-Major Axis:     43.23990698 +/-    0.0069
Time of Perihelion: 2481165.6405 +/-      61.0
Perihelion:          41.88503924 +/-    0.0272
Aphelion:            44.59477473 +/-    0.0273
Period (y)              284.3383 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.88410572 +/-    0.0016
Ecliptic Y           30.08873202 +/-    0.0015
Ecliptic Z           -3.37864738 +/-    0.0002
Ecliptic XDOT        -0.00173228 +/-    0.0000
Ecliptic YDOT        -0.00181218 +/-    0.0000
Ecliptic ZDOT         0.00074530 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.25014496 +/-    0.0015
Geocenter to KBO     42.26872125 +/-    0.0022
# 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.

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    -0.18       0.00    -0.02
  2   0.0027    -72.24     0.09       3.49     0.19
  3   1.0022   4417.29    -0.10    1324.78    -0.25
  4   1.0023   4415.25     0.33    1325.02    -0.11
  5   1.0539   3058.91    -0.08    1408.08     0.24
  6   2.0037   8870.69    -0.17    2652.48     0.01
  7   2.0037   8869.66    -0.12    2652.52     0.00
  8   2.0038   8867.80     0.18    2652.51    -0.10
  9   2.0801   6897.26     0.03    2786.67    -0.02
 10   2.0802   6896.34     0.06    2786.85     0.07
 11   2.0802   6895.32    -0.01    2786.71    -0.15
 12   2.0802   6894.37    -0.01    2786.99     0.05
 13   2.7573  16604.77 (  -0.21)   3961.80 (   0.58)
 14   2.9239  15340.98     0.19    3917.95    -0.53
 15   2.9239  15339.85    -0.04    3918.78     0.29
 16   2.9240  15338.89    -0.12    3918.46    -0.04
 17   2.9785  14046.90    -0.15    3953.74    -0.22
 18   2.9785  14046.10    -0.12    3953.96    -0.03
 19   2.9786  14045.62     0.21    3953.98    -0.04
 20   3.0713  11612.41    -0.19    4095.23     0.08
 21   3.0714  11611.78     0.07    4095.38     0.15
 22   3.0714  11610.03     0.13    4095.62     0.26
 23   3.1260  10397.18     0.14    4222.06     0.03
 24   3.1369  10195.22    -0.14    4250.71     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.

12CS57    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.381    43.400    43.361
ecceobj         0.030     0.031     0.028
incobj         17.045    17.046    17.045
qmin           41.415    41.370    41.418
qmax           45.513    45.596    45.463
amean          43.367    43.387    43.346
amin           43.042    43.049    43.015
amax           43.705    43.734    43.692
emean           0.030     0.031     0.029
emin            0.019     0.020     0.019
emax            0.041     0.043     0.041
imean          16.144    16.144    16.143
imin           15.732    15.732    15.720
imax           16.570    16.570    16.574
excite_mean     0.280     0.280     0.280
fracstop        1.000     1.000     1.000
cjmean          2.999     2.999     2.999

libcent 0       111.6    -180.0    -180.0
libamp  0       100.8    -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     179.9     180.0