Orbit Fit and Astrometric record for 12JH67

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: 12JH67    
# Created Sat Oct 21 01:38:10 2017
# Orbit generated from Bernstein formalism
# Fitting   28 observations of   28
# Arc:   3.90y
# First observation: 2010/04/19
#  Last observation: 2014/03/12
Preliminary a, adot, b, bdot, g, gdot:
   0.000144   0.021205  -0.000013  -0.000639   0.021466   0.000000
# Chi-squared of fit:    13.17 DOF:   50 RMS:  0.12
# Min/Max residuals:    -0.31    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.598129E-05  2.177631E-02 -1.346126E-06 -6.686355E-04  2.310479E-02  6.122763E-03
# Covariance matrix:
  4.1085E-13 -2.9392E-13 -1.5073E-15  4.5173E-15 -1.1138E-13 -2.1983E-12
 -2.9392E-13  3.6147E-13  2.4631E-15 -8.6582E-15  2.8202E-13  3.6479E-12
 -1.5073E-15  2.4631E-15  2.7260E-13 -9.0779E-14  2.3831E-15  2.8085E-14
  4.5173E-15 -8.6582E-15 -9.0779E-14  3.8038E-14 -1.3160E-14 -1.0539E-13
 -1.1138E-13  2.8202E-13  2.3831E-15 -1.3160E-14  6.4765E-13  3.7379E-12
 -2.1983E-12  3.6479E-12  2.8085E-14 -1.0539E-13  3.7379E-12  4.1885E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -6.501940 -136.570985    0.252780   -0.110401   -0.968290  2455305.927386
# Heliocentric elements and errors
Epoch:              2455300.5000  =  2010/04/14
Mean Anomaly:           59.62814 +/-     0.024
Argument of Peri:      163.32685 +/-     0.018
Long of Asc Node:      329.34929 +/-     0.004
Inclination:             6.62125 +/-     0.000
Eccentricity:         0.27246518 +/-    0.0003
Semi-Major Axis:     47.67607932 +/-    0.0081
Time of Perihelion: 2435384.6886 +/-       6.2
Perihelion:          34.68600779 +/-    0.0147
Aphelion:            60.66615085 +/-    0.0170
Period (y)              329.1994 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.10673127 +/-    0.0011
Ecliptic Y          -30.05162115 +/-    0.0010
Ecliptic Z           -4.90103642 +/-    0.0002
Ecliptic XDOT         0.00125886 +/-    0.0000
Ecliptic YDOT        -0.00235745 +/-    0.0000
Ecliptic ZDOT        -0.00016092 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.24886761 +/-    0.0011
Geocenter to KBO     43.28106990 +/-    0.0015
# Hcoef:  5.42

The following table shows the complete astrometric record for 12JH67. 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 (12JH67) followed by the observatory code and reference code for the source of the astrometry.

2010 04  19.42662  14 35 29.143  -22 03 38.37  21.9g 12JH67    F51  C~1w3q      
2010 04  19.43588  14 35 29.128  -22 03 38.42  22.0g 12JH67    F51  C~1w3q      
2010 05  13.39693  14 33 36.734  -21 55 26.95  22.1r 12JH67    F51  C~1w3q      
2011 04  14.47305  14 40 55.087  -22 30 08.13  21.4i 12JH67    F51  C~1w3q      
2011 04  14.48454  14 40 55.021  -22 30 07.51  21.5i 12JH67    F51  C~1w3q      
2012 01  30.63779  14 48 19.770  -22 54 42.12  22.2w 12JH67    F51  C~1w3q      
2012 01  30.64244  14 48 19.769  -22 54 42.31  22.0w 12JH67    F51  C~1w3q      
2012 01  30.64706  14 48 19.780  -22 54 42.18  22.1w 12JH67    F51  C~1w3q      
2012 05  14.40750  14 43 32.964  -22 44 39.70  21.9r 12JH67    F51  C~1w3q      
2012 05  14.41784  14 43 32.907  -22 44 39.39  21.8r 12JH67    F51  C~1w3q      
2012 05  20.37015  14 43 05.741  -22 42 31.38  22.1w 12JH67    F51  C~1w3q      
2012 05  20.38476  14 43 05.673  -22 42 31.01  21.9w 12JH67    F51  C~1w3q      
2012 05  20.39935  14 43 05.609  -22 42 30.69  21.8w 12JH67    F51  C~1w3q      
2012 05  20.41394  14 43 05.540  -22 42 30.40  21.7w 12JH67    F51  C~1w3q      
2013 04  12.50097  14 51 00.182  -23 17 45.73  21.7w 12JH67    F51  C~1w3q      
2013 04  12.52871  14 51 00.063  -23 17 45.26  21.7w 12JH67    F51  C~1w3q      
2013 04  12.54256  14 51 00.010  -23 17 45.22  21.7w 12JH67    F51  C~1w3q      
2013 05  05.39440  14 49 15.393  -23 11 19.91  21.9w 12JH67    F51  C~1w3q      
2013 05  05.40921  14 49 15.324  -23 11 19.82  21.7w 12JH67    F51  C~1w3q      
2013 05  05.42399  14 49 15.245  -23 11 19.63  22.1w 12JH67    F51  C~1w3q      
2013 05  05.43878  14 49 15.175  -23 11 19.41  21.8w 12JH67    F51  C~1w3q      
2014 02  10.60147  14 58 11.918  -23 41 18.85  21.9w 12JH67    F51  C~1w3q      
2014 02  10.61068  14 58 11.930  -23 41 19.14  21.8w 12JH67    F51  C~1w3q      
2014 02  10.61992  14 58 11.933  -23 41 18.80  22.0w 12JH67    F51  C~1w3q      
2014 02  10.62914  14 58 11.924  -23 41 19.22  21.9w 12JH67    F51  C~1w3q      
2014 03  12.56892  14 57 42.322  -23 43 53.06  21.4i 12JH67    F51  C~1w3q      
2014 03  12.58662  14 57 42.270  -23 43 53.28  22.1w 12JH67    F51  C~1w3q      
2014 03  12.59857  14 57 42.226  -23 43 52.99  22.1w 12JH67    F51  C~1w3q      

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    -0.22       0.00     0.18
  2   0.0000     -0.18     0.22      -0.11     0.10
  3   0.0656  -1638.73     0.03     -22.89    -0.08
  4   0.9858   4794.57     0.25    -121.91    -0.31
  5   0.9858   4793.51    -0.07    -121.59     0.05
  6   1.7829  11117.67    -0.01     300.01     0.06
  7   1.7829  11117.72    -0.06     299.82    -0.08
  8   1.7829  11117.82    -0.05     299.99     0.13
  9   2.0698   7143.47     0.06    -295.10    -0.08
 10   2.0698   7142.63    -0.08    -295.04    -0.03
 11   2.0861   6745.24    -0.10    -285.37    -0.05
 12   2.0861   6744.23    -0.13    -285.30    -0.00
 13   2.0862   6743.29    -0.10    -285.26     0.01
 14   2.0862   6742.29    -0.12    -285.27    -0.02
 15   2.9817  13645.41     0.01    -386.14    -0.01
 16   2.9818  13643.70     0.02    -386.16     0.09
 17   2.9818  13642.99     0.16    -386.33    -0.03
 18   3.0444  12145.39     0.06    -432.95     0.20
 19   3.0444  12144.45     0.14    -433.14     0.02
 20   3.0445  12143.34     0.07    -433.27    -0.10
 21   3.0445  12142.35     0.10    -433.34    -0.16
 22   3.8143  19782.92    -0.10     -73.68     0.03
 23   3.8143  19783.16     0.07     -73.91    -0.12
 24   3.8144  19783.11    -0.05     -73.57     0.31
 25   3.8144  19783.10    -0.12     -74.01    -0.04
 26   3.8964  19431.46     0.14    -334.96     0.08
 27   3.8964  19430.83     0.08    -335.37    -0.18
 28   3.8964  19430.16    -0.20    -335.26     0.02

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.

12JH67    quality flag:3

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

axisobj        47.472    47.496    47.449
ecceobj         0.273     0.274     0.272
incobj          6.621     6.621     6.621
qmin           33.722    33.280    33.721
qmax           62.500    62.948    62.568
amean          47.798    47.798    47.798
amin           47.331    47.300    47.347
amax           48.377    48.409    48.380
emean           0.275     0.283     0.273
emin            0.251     0.264     0.255
emax            0.294     0.301     0.294
imean           7.864     7.401     7.933
imin            7.114     6.691     7.179
imax            9.004     8.118     8.970
excite_mean     0.307     0.311     0.306
fracstop        1.000     1.000     1.000
cjmean          3.030     3.027     3.030

libcent 0       286.3     285.8     286.2
libamp  0        15.0      19.3      10.3
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       171.8     170.1     169.2
kozaiamp        179.9     180.0     179.9