Orbit Fit and Astrometric record for 12TD324

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: 12TD324   
# Created Sun Oct 22 01:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   19
# Arc:   3.06y
# First observation: 2010/09/08
#  Last observation: 2013/09/29
Preliminary a, adot, b, bdot, g, gdot:
   0.000097   0.030694  -0.000003  -0.001824   0.028520   0.000000
# Chi-squared of fit:    12.51 DOF:   28 RMS:  0.15
# Min/Max residuals:    -0.37    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.717002E-05  3.092619E-02 -1.006166E-06 -1.834482E-03  2.854607E-02  3.645241E-03
# Covariance matrix:
  6.7425E-13 -9.2718E-13 -2.0751E-14  4.3658E-14 -7.3686E-13 -7.6260E-12
 -9.2718E-13  3.3463E-12  8.8554E-14 -1.8830E-13  4.1322E-12  3.2375E-11
 -2.0751E-14  8.8554E-14  4.5537E-13 -2.0391E-13  1.1021E-13  8.9030E-13
  4.3658E-14 -1.8830E-13 -2.0391E-13  1.1903E-13 -2.3592E-13 -1.8903E-12
 -7.3686E-13  4.1322E-12  1.1021E-13 -2.3592E-13  5.9192E-12  4.0162E-11
 -7.6260E-12  3.2375E-11  8.9030E-13 -1.8903E-12  4.0162E-11  3.2573E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -9.162411    3.604657    0.310665   -0.151912   -0.941626  2455447.952686
# Heliocentric elements and errors
Epoch:              2455440.5000  =  2010/09/01
Mean Anomaly:           42.98846 +/-     0.109
Argument of Peri:      193.13335 +/-     0.179
Long of Asc Node:      114.56463 +/-     0.004
Inclination:             9.57187 +/-     0.000
Eccentricity:         0.14217999 +/-    0.0004
Semi-Major Axis:     39.66468668 +/-    0.0063
Time of Perihelion: 2444544.8318 +/-      27.4
Perihelion:          34.02516181 +/-    0.0183
Aphelion:            45.30421155 +/-    0.0189
Period (y)              249.8125 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.49130566 +/-    0.0029
Ecliptic Y            1.92344554 +/-    0.0002
Ecliptic Z           -5.57813967 +/-    0.0005
Ecliptic XDOT         0.00013055 +/-    0.0000
Ecliptic YDOT         0.00298654 +/-    0.0000
Ecliptic ZDOT        -0.00022939 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.97843885 +/-    0.0029
Geocenter to KBO     35.03109241 +/-    0.0030
# Hcoef:  6.84

The following table shows the complete astrometric record for 12TD324. 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 (12TD324) followed by the observatory code and reference code for the source of the astrometry.

2010 09  08.45192  00 27 50.498  -06 58 23.32  22.5r 12TD324   F51  C~1w3r      
2010 09  08.46355  00 27 50.440  -06 58 23.56  22.3r 12TD324   F51  C~1w3s      
2011 09  26.42400  00 33 05.629  -06 32 06.12  22.8w 12TD324   F51  C~1w3s      
2011 09  26.43802  00 33 05.530  -06 32 06.49  22.7w 12TD324   F51  C~1w3s      
2011 09  26.47277  00 33 05.350  -06 32 08.17  22.9w 12TD324   F51  C~1w3s      
2012 10  06.34748  00 38 50.042  -06 01 06.41  21.8i 12TD324   F51  C~1w3s      
2012 10  06.35962  00 38 49.965  -06 01 06.81  21.7i 12TD324   F51  C~1w3s      
2012 10  15.35663  00 38 04.433  -06 05 35.31  22.3w 12TD324   F51  C~1w3s      
2012 10  15.37116  00 38 04.374  -06 05 35.75  22.2w 12TD324   F51  C~1w3s      
2012 10  15.38577  00 38 04.307  -06 05 36.22  22.4w 12TD324   F51  C~1w3s      
2012 11  05.29573  00 36 28.228  -06 13 26.96  22.3w 12TD324   F51  C~1w3s      
2012 11  05.31081  00 36 28.168  -06 13 26.95  22.1w 12TD324   F51  C~1w3s      
2012 11  05.32589  00 36 28.103  -06 13 27.57  22.5w 12TD324   F51  C~1w3s      
2012 11  05.34102  00 36 28.037  -06 13 27.71  22.6w 12TD324   F51  C~1w3s      
2013 09  04.47671  00 47 59.853  -05 05 35.87  22.7w 12TD324   F51  C~1w3s      
2013 09  29.47544  00 46 01.427  -05 20 21.57  22.2w 12TD324   F51  C~1w3s      
2013 09  29.48863  00 46 01.370  -05 20 22.53  22.5w 12TD324   F51  C~1w3s      
2014 01  24.22619  00 42 07.903  -05 23 06.63  22.0w 12TD324   F51  C~1w3s      
2014 01  24.24269  00 42 07.921  -05 23 06.00  21.9w 12TD324   F51  C~1w3s      

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    -0.01       0.00    -0.00
  2   0.0000     -0.89     0.03       0.13     0.18
  3   1.0485   4933.52     0.24    -438.66    -0.19
  4   1.0486   4932.02    -0.07    -438.40     0.07
  5   1.0487   4928.88    -0.25    -438.86    -0.37
  6   2.0777  10390.32     0.09    -810.81    -0.02
  7   2.0778  10389.11    -0.11    -810.71     0.05
  8   2.1024   9657.65    -0.15    -781.23     0.27
  9   2.1024   9656.67     0.03    -781.27     0.15
 10   2.1025   9655.56     0.11    -781.30     0.05
 11   2.1597   8151.87     0.01    -632.36    -0.04
 12   2.1598   8151.06     0.15    -631.99     0.18
 13   2.1598   8149.92    -0.03    -632.17    -0.15
 14   2.1599   8148.96    -0.02    -631.90    -0.03
 15   2.9898  19290.99     0.12   -1108.91    -0.17
 16   3.0582  17298.95    -0.05   -1195.47     0.28
 17   3.0583  17297.77    -0.10   -1196.00    -0.26
 18   3.3779  14027.07 (   0.24)     76.92 (   0.55)
 19   3.3779  14027.57 (  -0.23)     77.38 (   0.81)

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.

12TD324    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.644    39.664    39.625
ecceobj         0.142     0.141     0.142
incobj          9.578     9.578     9.578
qmin           33.116    33.179    33.155
qmax           46.330    46.408    46.296
amean          39.457    39.458    39.458
amin           39.013    39.009    39.001
amax           39.947    39.946    39.953
emean           0.142     0.141     0.142
emin            0.122     0.122     0.123
emax            0.160     0.162     0.160
imean           7.791     7.778     7.866
imin            7.051     7.031     7.151
imax            8.547     8.552     8.548
excite_mean     0.196     0.196     0.198
fracstop        1.000     1.000     1.000
cjmean          3.008     3.008     3.008

libcent 0       179.6     178.6     179.1
libamp  0        93.4      93.1      93.4
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       174.4     176.5     174.6
kozaiamp        179.9     180.0     179.9