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 Mon May 21 01:38:02 2018
# Orbit generated from Bernstein formalism
# Fitting   23 observations of   25
# Arc:   3.96y
# First observation: 2009/10/15
#  Last observation: 2013/09/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000002   0.030888  -0.000001  -0.002062   0.029117   0.000000
# Chi-squared of fit:    17.10 DOF:   40 RMS:  0.15
# Min/Max residuals:    -0.37    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.774427E-05  3.113901E-02 -1.485876E-06 -2.069930E-03  2.861409E-02  3.029324E-03
# Covariance matrix:
  2.3951E-13 -1.7182E-13 -2.2970E-15  7.1705E-15 -1.4499E-13 -9.5858E-13
 -1.7182E-13  3.4237E-13  6.2464E-15 -2.0207E-14  1.7545E-13  2.7523E-12
 -2.2970E-15  6.2464E-15  1.9263E-13 -6.3843E-14  4.6126E-15  5.5276E-14
  7.1705E-15 -2.0207E-14 -6.3843E-14  3.2717E-14 -1.2558E-14 -1.7884E-13
 -1.4499E-13  1.7545E-13  4.6126E-15 -1.2558E-14  8.6039E-13  1.5462E-12
 -9.5858E-13  2.7523E-12  5.5276E-14 -1.7884E-13  1.5462E-12  2.4360E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -9.055487    0.947936   -0.359035   -0.146106   -0.916651  2455119.706717
# Heliocentric elements and errors
Epoch:              2455110.5000  =  2009/10/06
Mean Anomaly:           42.21811 +/-     0.033
Argument of Peri:      192.45791 +/-     0.049
Long of Asc Node:      114.53047 +/-     0.002
Inclination:             9.56957 +/-     0.000
Eccentricity:         0.14284963 +/-    0.0002
Semi-Major Axis:     39.63060371 +/-    0.0057
Time of Perihelion: 2444423.8714 +/-       7.9
Perihelion:          33.96938666 +/-    0.0078
Aphelion:            45.29182075 +/-    0.0089
Period (y)              249.4906 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.43314635 +/-    0.0011
Ecliptic Y            0.94258712 +/-    0.0000
Ecliptic Z           -5.50050631 +/-    0.0002
Ecliptic XDOT         0.00020938 +/-    0.0000
Ecliptic YDOT         0.00298837 +/-    0.0000
Ecliptic ZDOT        -0.00024129 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.86993031 +/-    0.0011
Geocenter to KBO     34.94782138 +/-    0.0011
# Hcoef:  6.87

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.

2009 10  15.205951 00 17 58.42   -07 55 35.8   22.5V 12TD324   645  C~2VVP      
2009 10  15.206780 00 17 58.43   -07 55 35.9   22.1V 12TD324   645  C~2VVP      
2009 10  15.209268 00 17 58.43   -07 55 35.8   23.5V 12TD324   645  C~2VVP      
2009 10  16.199253 00 17 53.59   -07 56 02.0   22.8V 12TD324   645  C~2VVP      
2009 10  16.200082 00 17 53.59   -07 56 02.0   22.2V 12TD324   645  C~2VVP      
2009 10  16.202570 00 17 53.60   -07 56 01.9   22.5V 12TD324   645  C~2VVP      
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    -0.11       0.00     0.07
  2   0.0000      0.10     0.05      -0.15    -0.09
  3   0.0000      0.14     0.28      -0.06    -0.01
  4   0.0027    -76.24    -0.26       4.82     0.00
  5   0.0027    -76.24    -0.19       4.82    -0.00
  6   0.0027    -76.06     0.18       4.85     0.02
  7   0.8987   9448.70     0.08    -419.82    -0.01
  8   0.8987   9447.81     0.12    -419.69     0.18
  9   1.9472  14394.68     0.20    -895.94    -0.19
 10   1.9472  14393.18    -0.11    -895.67     0.08
 11   1.9473  14390.02    -0.30    -896.11    -0.37
 12   2.9764  19878.79     0.04   -1310.37    -0.01
 13   2.9765  19877.57    -0.16   -1310.26     0.06
 14   3.0011  19141.53    -0.18   -1275.12     0.27
 15   3.0011  19140.54     0.01   -1275.16     0.15
 16   3.0012  19139.42     0.09   -1275.17     0.05
 17   3.0584  17627.71     0.04   -1114.38    -0.04
 18   3.0585  17626.89     0.19   -1114.01     0.18
 19   3.0585  17625.75     0.01   -1114.17    -0.15
 20   3.0585  17624.78     0.02   -1113.90    -0.03
 21   3.8885  28854.93     0.09   -1677.95    -0.17
 22   3.9569  26841.80    -0.01   -1749.58     0.27
 23   3.9570  26840.60    -0.07   -1750.11    -0.27
 24   4.2766  23549.35 (   0.44)   -446.65 (   0.52)
 25   4.2766  23549.86 (  -0.04)   -446.19 (   0.78)

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        39.643    39.661    39.626
ecceobj         0.142     0.142     0.142
incobj          9.578     9.578     9.578
qmin           33.127    33.115    33.132
qmax           46.373    46.341    46.368
amean          39.458    39.458    39.458
amin           39.002    39.001    39.002
amax           39.956    39.954    39.957
emean           0.142     0.142     0.142
emin            0.123     0.123     0.123
emax            0.161     0.161     0.161
imean           7.810     7.796     7.851
imin            7.070     7.058     7.131
imax            8.550     8.550     8.543
excite_mean     0.197     0.197     0.197
fracstop        1.000     1.000     1.000
cjmean          3.008     3.008     3.008

libcent 0       179.3     179.0     179.3
libamp  0        93.4      93.6      93.9
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       173.4     174.1     174.2
kozaiamp        180.0     180.0     179.9