Orbit Fit and Astrometric record for 07TD418

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: 07TD418   
# Created Tue Oct 24 01:37:43 2017
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   28
# Arc:   7.13y
# First observation: 2007/10/08
#  Last observation: 2014/11/26
Preliminary a, adot, b, bdot, g, gdot:
   0.000299   0.028953  -0.000005  -0.000092   0.026784   0.000000
# Chi-squared of fit:    14.82 DOF:   48 RMS:  0.13
# Min/Max residuals:    -0.32    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.742428E-05  2.858389E-02  5.957714E-07 -7.485771E-05  2.612828E-02 -4.996356E-04
# Covariance matrix:
  7.5490E-13  2.0265E-12 -1.4507E-14 -3.8892E-15  1.6125E-12  1.0507E-11
  2.0265E-12  8.6150E-12 -5.1502E-14 -1.5233E-14  5.7367E-12  4.4152E-11
 -1.4507E-14 -5.1502E-14  1.5074E-13 -2.1304E-14 -3.9082E-14 -2.6421E-13
 -3.8892E-15 -1.5233E-14 -2.1304E-14  4.7373E-15 -1.0711E-14 -7.8123E-14
  1.6125E-12  5.7367E-12 -3.9082E-14 -1.0711E-14  4.3460E-12  2.9429E-11
  1.0507E-11  4.4152E-11 -2.6421E-13 -7.8123E-14  2.9429E-11  2.2640E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -15.469545   28.727430    0.241976   -0.259030   -0.936394  2454381.756514
# Heliocentric elements and errors
Epoch:              2454380.5000  =  2007/10/07
Mean Anomaly:          354.54640 +/-     0.128
Argument of Peri:      277.28190 +/-     0.191
Long of Asc Node:      119.19278 +/-     0.001
Inclination:            15.09324 +/-     0.000
Eccentricity:         0.18690162 +/-    0.0001
Semi-Major Axis:     48.14475651 +/-    0.0092
Time of Perihelion: 2456228.9302 +/-      43.4
Perihelion:          39.14642333 +/-    0.0101
Aphelion:            57.14308969 +/-    0.0129
Period (y)              334.0656 +/-      0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.31336151 +/-    0.0026
Ecliptic Y           17.97959785 +/-    0.0014
Ecliptic Z          -10.20834437 +/-    0.0008
Ecliptic XDOT        -0.00147939 +/-    0.0000
Ecliptic YDOT         0.00259992 +/-    0.0000
Ecliptic ZDOT         0.00000630 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.20786004 +/-    0.0023
Geocenter to KBO     38.27270925 +/-    0.0031
# Hcoef:  8.17

The following table shows the complete astrometric record for 07TD418. 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 (07TD418) followed by the observatory code and reference code for the source of the astrometry.

2007 10  08.25576  02 08 35.01   -03 27 57.1   23.6R 07TD418   807  Cx2653      
2007 10  10.32486  02 08 25.60   -03 29 01.3   23.5R 07TD418   807  Cx2653      
2007 11  03.24977  02 06 31.16   -03 39 34.1   23.2R 07TD418   807  Cx2654      
2007 11  07.26226  02 06 11.92   -03 40 54.7   23.6R 07TD418   807  Cx2654      
2007 11  07.27862  02 06 11.84   -03 40 54.9   23.1I 07TD418   807  Cx2654      
2007 11  11.12904  02 05 53.70   -03 42 03.8   23.5R 07TD418   807  Cx2654      
2007 11  13.07251  02 05 44.70   -03 42 35.6   23.7R 07TD418   807  Cx2654      
2007 11  13.10947  02 05 44.53   -03 42 36.1   23.1I 07TD418   807  Cx2654      
2007 11  15.07051  02 05 35.55   -03 43 05.3   23.8R 07TD418   807  Cx2654      
2007 11  15.10199  02 05 35.41   -03 43 05.8   23.0I 07TD418   807  Cx2654      
2007 11  17.10267  02 05 26.40   -03 43 33.5   23.6R 07TD418   807  Cx2654      
2014 09  27.299479 02 52 21.28   +00 38 40.2   23.2i 07TD418   W84  C~1Cqe      
2014 09  27.303287 02 52 21.29   +00 38 39.9   23.4z 07TD418   W84  C~1Cqe      
2014 10  02.271499 02 52 03.26   +00 36 09.4   24.1g 07TD418   W84  C~1Cqe      
2014 10  02.276076 02 52 03.26   +00 36 09.7   23.6i 07TD418   W84  C~1Cqe      
2014 10  26.141985 02 50 18.75   +00 24 55.5   24.4g 07TD418   W84  C~1Cqe      
2014 10  26.144190 02 50 18.75   +00 24 55.5   23.7r 07TD418   W84  C~1Cqe      
2014 10  26.146551 02 50 18.74   +00 24 55.4   23.4i 07TD418   W84  C~1Cqe      
2014 11  12.129821 02 48 55.08   +00 18 41.7   24.2g 07TD418   W84  C~1Cqe      
2014 11  12.132037 02 48 55.07   +00 18 41.7   23.6r 07TD418   W84  C~1Cqe      
2014 11  12.134398 02 48 55.06   +00 18 41.5   23.4i 07TD418   W84  C~1Cqe      
2014 11  12.138183 02 48 55.04   +00 18 41.5   23.1z 07TD418   W84  C~1Cqe      
2014 11  19.193281 02 48 20.55   +00 16 44.7   24.3g 07TD418   W84  C~1Cqe      
2014 11  19.195498 02 48 20.52   +00 16 44.6   23.9r 07TD418   W84  C~1Cqe      
2014 11  19.197847 02 48 20.53   +00 16 44.5   24.0i 07TD418   W84  C~1Cqe      
2014 11  26.196597 02 47 47.42   +00 15 15.5   24.1r 07TD418   W84  C~1Cqe      
2014 11  26.198947 02 47 47.40   +00 15 15.3   23.8i 07TD418   W84  C~1Cqe      
2014 11  26.202755 02 47 47.38   +00 15 15.2   23.6z 07TD418   W84  C~1Cqe      

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    -0.03       0.00    -0.13
  2   0.0057   -154.44    -0.02     -10.92    -0.11
  3   0.0712  -1980.89 (   0.44)     -5.66 (  -0.23)
  4   0.0822  -2278.95     0.10      19.29    -0.05
  5   0.0822  -2280.14     0.12      19.52     0.06
  6   0.0927  -2558.70    -0.03      49.67     0.15
  7   0.0981  -2696.07    -0.05      66.85    -0.15
  8   0.0982  -2698.63     0.02      67.27    -0.09
  9   0.1035  -2834.82    -0.07      86.77     0.20
 10   0.1036  -2836.95    -0.01      87.03     0.13
 11   0.1091  -2973.04    -0.03     108.10    -0.01
 12   6.9707  42655.24    -0.10     -42.93     0.17
 13   6.9707  42655.28     0.17     -43.27    -0.14
 14   6.9843  42336.09    -0.32     -89.26    -0.14
 15   6.9843  42336.20     0.10     -88.97     0.18
 16   7.0497  40562.61    -0.01    -166.07    -0.06
 17   7.0497  40562.61     0.17    -166.07    -0.07
 18   7.0497  40562.43     0.18    -166.11    -0.11
 19   7.0962  39207.69    -0.05     -69.55     0.25
 20   7.0962  39207.54    -0.02     -69.49     0.28
 21   7.0962  39207.32    -0.05     -69.63     0.12
 22   7.0962  39207.03    -0.04     -69.52     0.20
 23   7.1155  38663.13     0.11       5.69    -0.07
 24   7.1155  38662.65    -0.20       5.76    -0.03
 25   7.1155  38662.76     0.09       5.61    -0.20
 26   7.1347  38149.58     0.13      99.75    -0.04
 27   7.1347  38149.21    -0.06      99.66    -0.15
 28   7.1347  38148.89    -0.12      99.68    -0.20

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.

07TD418    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        48.792    48.820    48.766
ecceobj         0.198     0.198     0.197
incobj         15.091    15.091    15.091
qmin           38.297    38.377    38.332
qmax           58.653    58.777    58.621
amean          48.298    48.324    48.267
amin           47.810    47.840    47.777
amax           48.809    48.843    48.783
emean           0.188     0.188     0.188
emin            0.174     0.174     0.172
emax            0.203     0.205     0.204
imean          13.788    13.781    13.791
imin           13.307    13.310    13.305
imax           14.332    14.296    14.340
excite_mean     0.304     0.304     0.304
fracstop        1.000     1.000     1.000
cjmean          3.040     3.040     3.039

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -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       179.1     178.4     180.6
kozaiamp        180.0     180.0     180.0