Orbit Fit and Astrometric record for 12TF324

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: 12TF324   
# Created Wed Oct 17 01:09:16 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   19 observations of   19
# Arc:   8.89y
# First observation: 2008/11/01
#  Last observation: 2017/09/23
# Chi-squared of fit:    10.23 DOF:   32 RMS:  0.13
# Min/Max residuals:    -0.30    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.732899E-05  2.696162E-02  7.380762E-07  2.207072E-03  2.594069E-02 -2.010530E-03
# Covariance matrix:
  4.7508E-13 -1.5510E-13  9.7738E-15 -7.8924E-15 -1.0774E-13 -4.1798E-13
 -1.5510E-13  8.5033E-14 -9.1120E-15  5.7139E-15  1.1268E-15  2.8416E-13
  9.7738E-15 -9.1120E-15  2.9064E-13 -5.3841E-14  8.0422E-15 -3.4921E-14
 -7.8924E-15  5.7139E-15 -5.3841E-14  1.3646E-14 -4.7985E-16  2.2522E-14
 -1.0774E-13  1.1268E-15  8.0422E-15 -4.7985E-16  2.7465E-13  4.2047E-14
 -4.1798E-13  2.8416E-13 -3.4921E-14  2.2522E-14  4.2047E-14  1.1291E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.563386   12.141635   -0.455813    0.101012   -0.877599  2454771.843109
# Heliocentric elements and errors
Epoch:              2454772.5000  =  2008/11/02
Mean Anomaly:          330.34463 +/-     0.023
Argument of Peri:       91.42813 +/-     0.029
Long of Asc Node:      318.39683 +/-     0.002
Inclination:             7.87367 +/-     0.000
Eccentricity:         0.11067444 +/-    0.0001
Semi-Major Axis:     43.45873316 +/-    0.0041
Time of Perihelion: 2463392.6500 +/-      15.2
Perihelion:          38.64896218 +/-    0.0044
Aphelion:            48.26850415 +/-    0.0052
Period (y)              286.4995 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           38.20953788 +/-    0.0008
Ecliptic Y            8.68232673 +/-    0.0002
Ecliptic Z            4.40632087 +/-    0.0001
Ecliptic XDOT        -0.00082471 +/-    0.0000
Ecliptic YDOT         0.00273445 +/-    0.0000
Ecliptic ZDOT         0.00020704 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.43057557 +/-    0.0007
Geocenter to KBO     38.54955555 +/-    0.0008
# Hcoef:  6.69

The following table shows the complete astrometric record for 12TF324. 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 (12TF324) followed by the observatory code and reference code for the source of the astrometry.

2008 11  01.342355 00 34 15.11   +10 50 07.0   22.0V 12TF324   645  C~2VVP      
2008 11  01.343184 00 34 15.12   +10 50 07.0   22.4V 12TF324   645  C~2VVP      
2008 11  01.345672 00 34 15.12   +10 50 07.0   24.1V 12TF324   645  C~2VVP      
2011 07  01.58309  00 57 14.925  +13 22 46.42  23.0w 12TF324   F51  C~1w3s      
2011 07  01.58810  00 57 14.923  +13 22 46.55  23.2w 12TF324   F51  C~1w3s      
2011 07  01.59940  00 57 14.927  +13 22 46.53  22.8w 12TF324   F51  C~1w3s      
2012 10  09.35059  00 58 48.617  +13 54 32.68  22.4w 12TF324   F51  C~1w3s      
2012 10  09.36472  00 58 48.531  +13 54 32.53  22.4w 12TF324   F51  C~1w3s      
2012 10  09.37895  00 58 48.470  +13 54 31.79  22.5w 12TF324   F51  C~1w3s      
2012 11  03.41308  00 56 49.889  +13 41 54.78  22.0i 12TF324   F51  C~1w3s      
2012 11  03.42509  00 56 49.834  +13 41 54.22  21.6i 12TF324   F51  C~1w3s      
2013 09  15.54707  01 06 32.965  +14 46 40.16  22.4w 12TF324   F51  C~1w3s      
2013 09  15.56080  01 06 32.909  +14 46 39.99  22.5w 12TF324   F51  C~1w3s      
2013 09  15.57461  01 06 32.855  +14 46 39.63  22.2w 12TF324   F51  C~1w3s      
2013 09  15.58845  01 06 32.790  +14 46 39.50  22.4w 12TF324   F51  C~1w3s      
2013 11  26.22632  01 01 12.404  +14 13 27.08  21.6i 12TF324   F51  C~1w3s      
2013 11  26.23900  01 01 12.380  +14 13 26.86  22.0i 12TF324   F51  C~1w3s      
2017 09  23.36290  01 29 45.39   +17 27 20.2   22.0R 12TF324   G37  C~2LSE      
2017 09  23.44969  01 29 45.00   +17 27 18.8         12TF324   G37  C~2LSE      

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    -0.18       0.00     0.06
  2   0.0000      0.00     0.02       0.00     0.09
  3   0.0000      0.00     0.18       0.00     0.16
  4   2.6619      0.00     0.20       0.00    -0.05
  5   2.6619      0.00     0.06       0.00    -0.03
  6   2.6619      0.00    -0.13       0.00    -0.30
  7   3.9371      0.00     0.17       0.00     0.01
  8   3.9371      0.00    -0.06       0.00     0.26
  9   3.9371      0.00     0.10       0.00    -0.07
 10   4.0057      0.00    -0.05       0.00    -0.03
 11   4.0057      0.00    -0.08       0.00    -0.22
 12   4.8712      0.00    -0.08       0.00    -0.06
 13   4.8712      0.00     0.00       0.00     0.04
 14   4.8713      0.00     0.12       0.00    -0.05
 15   4.8713      0.00     0.07       0.00     0.10
 16   5.0674      0.00     0.04       0.00     0.03
 17   5.0675      0.00     0.27       0.00     0.14
 18   8.8926      0.00    -0.07       0.00    -0.08
 19   8.8928      0.00     0.14       0.00     0.22

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.

12TF324    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.733    43.733    43.733
ecceobj         0.117     0.117     0.117
incobj          7.880     7.880     7.880
qmin           37.678    37.668    37.699
qmax           49.450    49.418    49.423
amean          43.415    43.415    43.415
amin           43.065    43.056    43.048
amax           43.802    43.802    43.802
emean           0.110     0.110     0.110
emin            0.092     0.092     0.092
emax            0.129     0.129     0.129
imean           8.925     8.925     8.925
imin            8.012     8.012     8.012
imax            9.923     9.923     9.923
excite_mean     0.190     0.190     0.190
fracstop        1.000     1.000     1.000
cjmean          3.051     3.051     3.051

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       180.4     180.5     180.5
kozaiamp        180.0     180.0     180.0