Orbit Fit and Astrometric record for 07TJ422

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: 07TJ422   
# Created Sun Oct 22 01:37:44 2017
# Orbit generated from Bernstein formalism
# Fitting   28 observations of   30
# Arc:   7.15y
# First observation: 2007/09/05
#  Last observation: 2014/10/29
Preliminary a, adot, b, bdot, g, gdot:
   0.003989   0.119760   0.000293   0.004796   0.072775   0.000000
# Chi-squared of fit:    35.64 DOF:   50 RMS:  0.20
# Min/Max residuals:    -0.74    0.41
# Exact a, adot, b, bdot, g, gdot:
  2.899274E-05  1.531652E-01  5.056726E-07  6.086021E-03  8.418475E-02  7.556599E-02
# Covariance matrix:
  2.6072E-13 -3.0931E-14  2.2631E-15 -1.0669E-15  2.8353E-13 -4.4368E-14
 -3.0931E-14  3.6897E-13 -3.8963E-15  1.5031E-14  1.7333E-13  4.3256E-13
  2.2631E-15 -3.8963E-15  7.7574E-14 -1.5009E-14  1.4400E-15 -5.0078E-15
 -1.0669E-15  1.5031E-14 -1.5009E-14  1.2792E-14  6.6804E-15  1.8275E-14
  2.8353E-13  1.7333E-13  1.4400E-15  6.6804E-15  5.4936E-13  1.7043E-13
 -4.4368E-14  4.3256E-13 -5.0078E-15  1.8275E-14  1.7043E-13  5.2779E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.851765   -4.310858    0.229311    0.031769   -0.980837  2454348.803264
# Heliocentric elements and errors
Epoch:              2454340.5000  =  2007/08/28
Mean Anomaly:           26.34478 +/-     0.002
Argument of Peri:      316.82496 +/-     0.003
Long of Asc Node:      318.65014 +/-     0.001
Inclination:             2.90850 +/-     0.000
Eccentricity:         0.52781654 +/-    0.0000
Semi-Major Axis:     19.58984646 +/-    0.0011
Time of Perihelion: 2452022.9080 +/-       0.0
Perihelion:           9.25000143 +/-    0.0006
Aphelion:            29.92969150 +/-    0.0017
Period (y)               86.7071 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           12.79930866 +/-    0.0001
Ecliptic Y           -1.19932793 +/-    0.0000
Ecliptic Z            0.38387446 +/-    0.0000
Ecliptic XDOT         0.00282367 +/-    0.0000
Ecliptic YDOT         0.00478135 +/-    0.0000
Ecliptic ZDOT         0.00027714 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   12.86110607 +/-    0.0001
Geocenter to KBO     11.87863573 +/-    0.0001
# Hcoef: 11.11

The following table shows the complete astrometric record for 07TJ422. 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 (07TJ422) followed by the observatory code and reference code for the source of the astrometry.

2007 09  05.30251  23 41 14.15   -00 00 48.9   22.3  07TJ422   705  cx9534      
2007 09  05.30583  23 41 14.10   -00 00 48.9   23.2  07TJ422   705  cx9534      
2007 09  14.25953  23 39 19.64   -00 12 24.4   22.4  07TJ422   705  cx9534      
2007 09  14.26285  23 39 19.62   -00 12 24.5   23.5  07TJ422   705  cx9534      
2007 10  06.29636  23 34 42.06   -00 41 29.2   22.3  07TJ422   705  cx9534      
2007 10  06.29719  23 34 42.06   -00 41 29.1   22.9  07TJ422   705  cx9534      
2007 10  12.30336  23 33 33.71   -00 48 52.3   22.5  07TJ422   705  cx9534      
2007 10  12.30668  23 33 33.67   -00 48 52.5   23.6  07TJ422   705  cx9534      
2007 10  15.30186  23 33 01.58   -00 52 22.7   22.3  07TJ422   705  cx9534      
2007 10  15.30269  23 33 01.58   -00 52 22.7   23.0  07TJ422   705  cx9534      
2007 10  20.28716  23 32 11.62   -00 57 53.5   22.6  07TJ422   705  cx9534      
2007 10  20.28799  23 32 11.62   -00 57 53.6   23.7  07TJ422   705  cx9534      
2007 11  04.20881  23 30 12.67   -01 11 26.7   22.7  07TJ422   705  cx9534      
2007 11  04.21213  23 30 12.66   -01 11 26.9   23.6  07TJ422   705  cx9534      
2007 11  07.16674  23 29 55.31   -01 13 30.8   23.2  07TJ422   705  cx9534      
2007 11  07.16757  23 29 55.32   -01 13 31.1   24.7  07TJ422   705  cx9534      
2008 10  03.224190 00 04 56.15   +02 55 02.8   22.6V 07TJ422   645  C~1Sga      
2008 10  03.225919 00 04 56.14   +02 55 02.8   22.0V 07TJ422   645  C~1Sga      
2008 10  03.227507 00 04 56.11   +02 55 02.6   23.9V 07TJ422   645  C~1Sga      
2008 12  01.07660  23 57 24.56   +02 02 21.1   23.1R 07TJ422   688  C~02eZ      
2008 12  01.23865  23 57 24.32   +02 02 20.3         07TJ422   688  C~02eZ      
2008 12  21.13656  23 57 57.38   +02 03 27.1   22.4r 07TJ422   695  C~02eZ      
2008 12  21.18283  23 57 57.58   +02 03 28.0   22.3r 07TJ422   695  C~02eZ      
2008 12  22.17873  23 58 02.04   +02 03 49.5   21.9r 07TJ422   695  C~02eZ      
2009 09  17.35883  00 34 14.92   +06 18 44.8   23.1R 07TJ422   688  C~09cc      
2009 09  17.44074  00 34 13.94   +06 18 39.4         07TJ422   688  C~09cc      
2014 10  29.26371  02 03 11.80   +15 40 49.7   23.6R 07TJ422   G37  C~1eNK      
2014 10  29.29089  02 03 11.52   +15 40 48.1         07TJ422   G37  C~1eNK      
2014 10  29.36273  02 03 10.76   +15 40 44.3         07TJ422   G37  C~1eNK      
2014 10  29.39139  02 03 10.46   +15 40 42.7         07TJ422   G37  C~1eNK      

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    -0.05       0.00     0.13
  2   0.0000     -0.69    -0.05       0.30     0.41
  3   0.0245  -1852.67    -0.13      42.85     0.04
  4   0.0245  -1852.98     0.26      42.88     0.05
  5   0.0849  -6368.74    -0.19      92.32    -0.02
  6   0.0849  -6368.70     0.02      92.41     0.07
  7   0.1013  -7486.83    -0.10      91.98    -0.02
  8   0.1013  -7487.46    -0.13      92.03     0.03
  9   0.1095  -8013.39    -0.13      89.85     0.11
 10   0.1095  -8013.39     0.02      89.85     0.11
 11   0.1232  -8833.81     0.02      83.15     0.06
 12   0.1232  -8833.85     0.11      83.05    -0.03
 13   0.1640 -10798.40    -0.05      43.40    -0.03
 14   0.1640 -10798.62     0.09      43.28    -0.15
 15   0.1721 -11087.41     0.12      32.58     0.15
 16   0.1721 -11087.40     0.22      32.25    -0.18
 17   1.0785  23862.02    -0.04    1255.45    -0.44
 18   1.0785  23861.88     0.17    1255.51    -0.39
 19   1.0785  23861.38    -0.00    1255.50    -0.39
 20   1.2396  16324.22    -0.43    1020.14    -0.74
 21   1.2401  16320.57 (  -0.34)   1020.83 (   0.84)
 22   1.2945  16805.26    -0.01     885.85     0.37
 23   1.2947  16808.39     0.08     885.49     0.27
 24   1.2974  16878.76     0.13     878.78     0.19
 25   2.0344  53914.93     0.07    2293.76     0.31
 26   2.0346  53898.30 (  -0.24)   2294.40 (   0.62)
 27   7.1484 163249.95    -0.12    6989.29     0.08
 28   7.1485 163242.89    -0.02    6988.91    -0.10
 29   7.1487 163223.99     0.04    6988.53     0.07
 30   7.1488 163216.48     0.09    6988.26     0.03

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.

07TJ422    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        19.458    19.462    19.454
ecceobj         0.525     0.525     0.525
incobj          2.913     2.913     2.913
qmin            9.245     9.245     9.245
qmax           29.671    29.679    29.663
amean          19.458    19.462    19.454
amin           19.458    19.462    19.454
amax           19.458    19.462    19.454
emean           0.525     0.525     0.525
emin            0.525     0.525     0.525
emax            0.525     0.525     0.525
imean           4.342     4.342     4.342
imin            4.342     4.342     4.342
imax            4.342     4.342     4.342
excite_mean     0.530     0.530     0.530
fracstop        0.000     0.000     0.000
cjmean          2.911     2.911     2.911

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       316.7     316.7     316.7
kozaiamp          0.0       0.0       0.0