Orbit Fit and Astrometric record for 12WE37

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: 12WE37    
# Created Fri Dec  3 02:11:29 2021
# Orbit generated from Bernstein formalism
# Fitting     33 observations of     33
# Arc:   3.15y
# First observation: 2012/11/16
#  Last observation: 2016/01/10
Preliminary a, adot, b, bdot, g, gdot:
   0.000125   0.030675   0.000029   0.012810   0.029072   0.000000
# Chi-squared of fit:    11.92 DOF:     60 RMS:  0.11
# Min/Max residuals:    -0.36    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.705424E-05  3.080700E-02  6.816061E-06  1.290235E-02  2.853721E-02 -3.629031E-04
# Covariance matrix:
  1.3710E-13 -1.4433E-13  1.5918E-14 -4.6582E-14  6.9346E-15 -1.1730E-12
 -1.4433E-13  3.6493E-13 -5.4670E-14  1.5505E-13  9.8936E-14  3.9462E-12
  1.5918E-14 -5.4670E-14  1.1620E-13 -7.6410E-14 -1.5896E-14 -6.6569E-13
 -4.6582E-14  1.5505E-13 -7.6410E-14  1.1557E-13  2.6954E-14  1.9024E-12
  6.9346E-15  9.8936E-14 -1.5896E-14  2.6954E-14  4.7956E-13  8.4484E-13
 -1.1730E-12  3.9462E-12 -6.6569E-13  1.9024E-12  8.4484E-13  4.8292E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -12.386087   32.890961   -0.354829   -0.197255   -0.898624  2456247.632086
# Heliocentric elements and errors
Epoch:              2456240.5000  =  2012/11/09
Mean Anomaly:          359.84036 +/-     0.034
Argument of Peri:      331.35159 +/-     0.059
Long of Asc Node:       59.91676 +/-     0.000
Inclination:            25.64828 +/-     0.000
Eccentricity:         0.25069596 +/-    0.0001
Semi-Major Axis:     47.97169581 +/-    0.0068
Time of Perihelion: 2456294.3163 +/-      11.6
Perihelion:          35.94538548 +/-    0.0067
Aphelion:            59.99800614 +/-    0.0096
Period (y)              332.2659 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.32119387 +/-    0.0007
Ecliptic Y           19.38681720 +/-    0.0005
Ecliptic Z           -7.51625865 +/-    0.0002
Ecliptic XDOT        -0.00141670 +/-    0.0000
Ecliptic YDOT         0.00260937 +/-    0.0000
Ecliptic ZDOT         0.00121663 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.94544805 +/-    0.0006
Geocenter to KBO     35.04196916 +/-    0.0009
# Hcoef:  7.68

The following table shows the complete astrometric record for 12WE37. 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 (12WE37) followed by the observatory code and reference code for the source of the astrometry.

2012 11  16.131308 02 19 33.80   +00 48 45.7   23.7g 12WE37    W84  C~3526      
2012 11  16.132674 02 19 33.80   +00 48 45.7   23.3r 12WE37    W84  C~3526      
2012 11  16.139653 02 19 33.76   +00 48 45.6   23.9g 12WE37    W84  C~3526      
2012 11  16.141007 02 19 33.74   +00 48 45.6   23.3r 12WE37    W84  C~3526      
2012 11  16.144063 02 19 33.74   +00 48 45.5   23.2r 12WE37    W84  C~3526      
2012 11  16.145440 02 19 33.70   +00 48 45.5   23.7g 12WE37    W84  C~3526      
2012 12  06.136667 02 17 58.75   +00 46 57.8   23.2r 12WE37    W84  C~3526      
2012 12  06.139398 02 17 58.77   +00 46 57.9   23.2r 12WE37    W84  C~3526      
2012 12  06.142176 02 17 58.73   +00 46 57.8   23.8r 12WE37    W84  C~3526      
2012 12  07.177905 02 17 54.46   +00 46 59.1   23.1i 12WE37    W84  C~3526      
2013 11  13.16175  02 25 31.833  +02 06 38.61  22.4z 12WE37    W84  C~4yPN      
2013 11  13.16175  02 25 31.83   +02 06 38.6   22.6z 12WE37    W84  C~3cjt      
2013 11  23.21306  02 24 39.370  +02 04 46.32  22.8i 12WE37    W84  C~4yPO      
2013 11  23.21306  02 24 39.37   +02 04 46.3   22.8i 12WE37    W84  C~3cjt      
2013 11  23.21444  02 24 39.365  +02 04 46.26  22.9z 12WE37    W84  C~4yPO      
2013 11  23.21444  02 24 39.37   +02 04 46.3   23.0z 12WE37    W84  C~3cjt      
2013 12  01.18708  02 24 00.876  +02 03 57.27  24.1g 12WE37    W84  C~4yPO      
2013 12  01.18848  02 24 00.868  +02 03 57.40  23.4r 12WE37    W84  C~4yPO      
2013 12  01.18848  02 24 00.87   +02 03 57.4   23.5r 12WE37    W84  C~3cjt      
2013 12  20.13920  02 22 46.230  +02 04 40.95  22.5i 12WE37    W84  C~4yPO      
2013 12  20.13920  02 22 46.23   +02 04 41.0   23.0i 12WE37    W84  C~3cjt      
2014 10  01.357569 02 34 59.68   +03 38 43.4   23.0i 12WE37    W84  C~3526      
2014 10  21.301134 02 33 20.12   +03 30 55.3   22.8g 12WE37    W84  C~3526      
2014 10  21.30304  02 33 20.097  +03 30 55.09  23.0r 12WE37    W84  C~4yPO      
2014 10  21.30304  02 33 20.10   +03 30 55.1   23.1r 12WE37    W84  C~3cjt      
2014 12  16.12784  02 28 38.608  +03 20 40.05  24.2g 12WE37    W84  C~4yPO      
2014 12  16.12920  02 28 38.607  +03 20 40.02  23.3i 12WE37    W84  C~4yPO      
2014 12  16.12920  02 28 38.61   +03 20 40.0   23.3i 12WE37    W84  C~3cjt      
2015 12  17.14183  02 34 14.127  +04 37 02.59  23.0i 12WE37    W84  C~4yPO      
2015 12  17.14183  02 34 14.13   +04 37 02.6   23.0i 12WE37    W84  C~3cjt      
2015 12  17.14320  02 34 14.124  +04 37 02.56  23.1r 12WE37    W84  C~4yPO      
2015 12  17.14320  02 34 14.12   +04 37 02.6   23.0r 12WE37    W84  C~3cjt      
2016 01  10.07326  02 33 10.527  +04 41 10.13  24.2g 12WE37    W84  C~4yPO      

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     0.00       0.00     0.07
     2   0.0000      0.00     0.11       0.00     0.05
     3   0.0000     -0.60     0.06       0.11     0.04
     4   0.0000     -0.88    -0.11       0.21     0.12
     5   0.0000     -0.92     0.10       0.11    -0.02
     6   0.0000     -1.48    -0.36       0.31     0.16
     7   0.0548  -1379.77    -0.17     374.60     0.07
     8   0.0548  -1379.45     0.31     374.59    -0.00
     9   0.0548  -1380.05    -0.12     374.70     0.04
    10   0.0576  -1439.98    -0.11     397.32    -0.00
    11   0.9912   6623.06     0.18    2614.01     0.00
    12   0.9912   6623.11     0.22    2614.00    -0.00
    13   1.0187   5843.50    -0.02    2770.31    -0.02
    14   1.0187   5843.51    -0.02    2770.33    -0.00
    15   1.0187   5843.42    -0.00    2770.30    -0.06
    16   1.0187   5843.50     0.08    2770.31    -0.05
    17   1.0405   5282.73     0.00    2916.54    -0.18
    18   1.0405   5282.69     0.06    2916.69    -0.06
    19   1.0405   5282.66     0.03    2916.70    -0.05
    20   1.0924   4241.88     0.02    3331.13    -0.17
    21   1.0924   4241.86    -0.00    3331.08    -0.22
    22   1.8733  16518.94    -0.16    5005.19    -0.08
    23   1.9279  14948.06     0.18    5056.79     0.07
    24   1.9279  14947.71    -0.01    5056.70    -0.03
    25   1.9279  14947.67    -0.06    5056.71    -0.03
    26   2.0808  10750.88    -0.09    5875.96     0.07
    27   2.0808  10750.89    -0.00    5875.90    -0.01
    28   2.0808  10750.86    -0.04    5875.93     0.02
    29   3.0828  17043.97     0.02    8548.74     0.10
    30   3.0828  17043.92    -0.02    8548.75     0.11
    31   3.0829  17043.87    -0.00    8548.74     0.07
    32   3.0829  17043.83    -0.04    8548.79     0.12
    33   3.1484  16223.66    -0.01    9098.68    -0.14

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.

12WE37    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        48.160    48.181    48.138
ecceobj         0.253     0.254     0.253
incobj         25.647    25.647    25.647
qmin           32.499    32.522    32.281
qmax           63.690    63.784    64.014
amean          47.797    47.797    47.797
amin           47.288    47.314    47.269
amax           48.435    48.405    48.430
emean           0.262     0.271     0.278
emin            0.193     0.224     0.225
emax            0.318     0.318     0.323
imean          23.617    23.524    23.262
imin           21.779    21.897    21.510
imax           25.208    24.906    24.790
excite_mean     0.480     0.483     0.484
fracstop        1.000     1.000     1.000
cjmean          2.856     2.852     2.852

libcent 0        75.3      73.4      75.1
libamp  0        30.8      25.1      34.7
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       179.1     183.2     190.9
kozaiamp        180.0     180.0     179.9