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 Fri Dec 15 02:37:48 2017
# Orbit generated from Bernstein formalism
# Fitting   16 observations of   16
# Arc:   6.23y
# First observation: 2011/07/01
#  Last observation: 2017/09/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000189   0.027766  -0.000075   0.001915   0.026566   0.000000
# Chi-squared of fit:     7.43 DOF:   26 RMS:  0.12
# Min/Max residuals:    -0.20    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.554878E-05  2.655850E-02  1.349712E-06  1.832518E-03  2.537205E-02 -8.357606E-04
# Covariance matrix:
  4.2172E-13 -2.1941E-13  8.1101E-15 -1.7017E-14  5.2789E-14 -1.0130E-12
 -2.1941E-13  4.4614E-13 -5.9589E-14  3.2908E-14  4.0370E-13  2.5020E-12
  8.1101E-15 -5.9589E-14  2.1377E-13 -6.0436E-14 -7.7945E-14 -3.5197E-13
 -1.7017E-14  3.2908E-14 -6.0436E-14  2.9718E-14  2.5981E-14  1.9750E-13
  5.2789E-14  4.0370E-13 -7.7945E-14  2.5981E-14  6.7467E-13  2.3576E-12
 -1.0130E-12  2.5020E-12 -3.5197E-13  1.9750E-13  2.3576E-12  1.4946E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.698371   18.351489    1.003067   -0.019260    0.163475  2455744.083856
# Heliocentric elements and errors
Epoch:              2455740.5000  =  2011/06/28
Mean Anomaly:          333.91292 +/-     0.050
Argument of Peri:       91.40064 +/-     0.065
Long of Asc Node:      318.47234 +/-     0.002
Inclination:             7.88015 +/-     0.000
Eccentricity:         0.11574104 +/-    0.0001
Semi-Major Axis:     43.67377157 +/-    0.0052
Time of Perihelion: 2463379.7810 +/-      14.5
Perihelion:          38.61892398 +/-    0.0070
Aphelion:            48.72861917 +/-    0.0078
Period (y)              288.6285 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.31689001 +/-    0.0012
Ecliptic Y           11.32151764 +/-    0.0004
Ecliptic Z            4.59738503 +/-    0.0002
Ecliptic XDOT        -0.00101181 +/-    0.0000
Ecliptic YDOT         0.00269038 +/-    0.0000
Ecliptic ZDOT         0.00018592 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.26656327 +/-    0.0011
Geocenter to KBO     39.41344734 +/-    0.0013
# Hcoef:  6.67

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.

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     0.21       0.00    -0.04
  2   0.0000      0.02     0.09       0.13     0.03
  3   0.0000      0.07    -0.18       0.09    -0.15
  4   1.2752   1997.56     0.10    1228.50    -0.01
  5   1.2752   1996.35    -0.01    1228.84     0.30
  6   1.2753   1995.25     0.01    1228.51    -0.06
  7   1.3438    109.42    -0.10    1200.04     0.03
  8   1.3439    108.47    -0.20    1199.83    -0.14
  9   2.2093   9435.50    -0.17    1535.28    -0.01
 10   2.2094   9434.68    -0.05    1535.43     0.05
 11   2.2094   9433.82     0.02    1535.39    -0.07
 12   2.2095   9432.89     0.03    1535.63     0.08
 13   2.4056   4365.93    -0.00    1469.01     0.01
 14   2.4056   4365.53     0.25    1468.94     0.03
 15   6.2307  31881.15    -0.14    3176.47    -0.14
 16   6.2310  31875.30     0.15    3177.13     0.08

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    43.747    43.718
ecceobj         0.117     0.117     0.116
incobj          7.880     7.880     7.880
qmin           37.695    37.686    37.687
qmax           49.429    49.436    49.409
amean          43.415    43.428    43.400
amin           43.063    43.070    43.037
amax           43.801    43.815    43.785
emean           0.110     0.110     0.110
emin            0.092     0.092     0.092
emax            0.129     0.129     0.129
imean           8.925     8.920     8.928
imin            8.011     7.999     8.017
imax            9.921     9.918     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     180.6     180.4
kozaiamp        179.9     179.9     180.0