Orbit Fit and Astrometric record for 12FL84

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: 12FL84    
# Created Wed Jul 18 01:38:07 2018
# Orbit generated from Bernstein formalism
# Fitting   24 observations of   24
# Arc:  10.02y
# First observation: 2003/04/27
#  Last observation: 2013/05/03
Preliminary a, adot, b, bdot, g, gdot:
  -0.000953   0.033199   0.000634  -0.012143   0.030385   0.000000
# Chi-squared of fit:    10.48 DOF:   42 RMS:  0.12
# Min/Max residuals:    -0.22    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.928638E-05  3.217344E-02 -6.727636E-06 -1.174832E-02  2.652786E-02 -9.705738E-04
# Covariance matrix:
  4.4404E-13 -1.2606E-13 -2.6962E-14  3.1084E-14 -7.8056E-15 -2.4982E-13
 -1.2606E-13  1.1649E-13  3.8364E-14 -4.1351E-14  1.2216E-13  3.3061E-13
 -2.6962E-14  3.8364E-14  3.8055E-13 -5.4654E-14  6.2748E-14  1.1527E-13
  3.1084E-14 -4.1351E-14 -5.4654E-14  2.0657E-14 -5.1858E-14 -1.2327E-13
 -7.8056E-15  1.2216E-13  6.2748E-14 -5.1858E-14  8.0864E-13  4.0451E-13
 -2.4982E-13  3.3061E-13  1.1527E-13 -1.2327E-13  4.0451E-13  9.8496E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   17.084067 -165.489412   -0.380735    0.273959   -0.891423  2452756.661611
# Heliocentric elements and errors
Epoch:              2452750.5000  =  2003/04/21
Mean Anomaly:          359.61818 +/-     0.001
Argument of Peri:      141.29265 +/-     0.004
Long of Asc Node:       52.97875 +/-     0.000
Inclination:            26.00389 +/-     0.000
Eccentricity:         0.63431138 +/-    0.0002
Semi-Major Axis:    105.50132781 +/-    0.0481
Time of Perihelion: 2453170.2959 +/-       0.8
Perihelion:          38.58063478 +/-    0.0240
Aphelion:           172.42202084 +/-    0.0802
Period (y)             1083.6651 +/-      0.74
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.69291657 +/-    0.0012
Ecliptic Y           -9.62707384 +/-    0.0003
Ecliptic Z           11.07397262 +/-    0.0004
Ecliptic XDOT         0.00057368 +/-    0.0000
Ecliptic YDOT        -0.00328478 +/-    0.0000
Ecliptic ZDOT        -0.00118824 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.59142021 +/-    0.0011
Geocenter to KBO     37.69622300 +/-    0.0013
# Hcoef:  6.67

The following table shows the complete astrometric record for 12FL84. 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 (12FL84) followed by the observatory code and reference code for the source of the astrometry.

2003 04  27.160868 13 19 57.17   +10 02 09.0   21.9V 12FL84    645  C~1w3q      
2003 04  27.161697 13 19 57.17   +10 02 09.0   21.8V 12FL84    645  C~1w3q      
2003 04  27.164185 13 19 57.15   +10 02 09.0   22.8V 12FL84    645  C~1w3q      
2006 05  25.166413 13 35 14.75   +06 01 42.8   22.2V 12FL84    645  C~2VVI      
2006 05  25.167242 13 35 14.75   +06 01 42.8         12FL84    645  C~2VVI      
2011 04  30.39245  14 05 12.503  -00 46 05.00  23.5w 12FL84    F51  C~1w3q      
2011 04  30.40601  14 05 12.432  -00 46 04.40  23.0w 12FL84    F51  C~1w3q      
2011 04  30.43468  14 05 12.291  -00 46 03.97  23.0w 12FL84    F51  C~1w3q      
2012 03  29.46818  14 13 12.338  -02 16 34.23  22.9w 12FL84    F51  C~1w3q      
2012 03  29.48251  14 13 12.268  -02 16 33.88  23.1w 12FL84    F51  C~1w3q      
2012 03  29.49696  14 13 12.204  -02 16 33.61  23.0w 12FL84    F51  C~1w3q      
2012 03  29.51148  14 13 12.132  -02 16 33.14  23.1w 12FL84    F51  C~1w3q      
2012 05  18.35687  14 09 16.441  -02 02 22.12  22.6w 12FL84    F51  C~1w3q      
2012 05  18.37043  14 09 16.383  -02 02 21.93  22.7w 12FL84    F51  C~1w3q      
2012 05  18.38403  14 09 16.323  -02 02 21.73  22.6w 12FL84    F51  C~1w3q      
2012 05  18.39766  14 09 16.258  -02 02 21.67  22.4w 12FL84    F51  C~1w3q      
2013 04  10.42500  14 17 49.767  -03 31 50.84  22.8w 12FL84    F51  C~1w3q      
2013 04  10.43862  14 17 49.709  -03 31 50.47  22.5w 12FL84    F51  C~1w3q      
2013 04  10.45234  14 17 49.632  -03 31 50.39  22.2w 12FL84    F51  C~1w3q      
2013 04  10.46600  14 17 49.572  -03 31 50.20  22.3w 12FL84    F51  C~1w3q      
2013 05  03.38127  14 15 58.336  -03 24 54.14  22.4w 12FL84    F51  C~1w3q      
2013 05  03.39484  14 15 58.262  -03 24 53.98  22.7w 12FL84    F51  C~1w3q      
2013 05  03.40840  14 15 58.179  -03 24 53.70  22.7w 12FL84    F51  C~1w3q      
2013 05  03.42197  14 15 58.117  -03 24 53.62  22.5w 12FL84    F51  C~1w3q      

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    -0.02       0.00    -0.06
  2   0.0000      0.00     0.04       0.00    -0.04
  3   0.0000     -0.27    -0.06      -0.12    -0.12
  4   3.0774  18278.66    -0.01   -7880.84     0.10
  5   3.0774  18278.66     0.03   -7880.84     0.12
  6   8.0088  54080.39     0.07  -19849.92    -0.22
  7   8.0089  54079.08    -0.15  -19849.78     0.13
  8   8.0090  54076.82    -0.12  -19850.24     0.12
  9   8.9235  63650.19     0.25  -22125.39     0.15
 10   8.9235  63648.98     0.13  -22125.49     0.14
 11   8.9236  63647.90     0.14  -22125.62     0.09
 12   8.9236  63646.60    -0.05  -22125.61     0.18
 13   9.0601  59742.39     0.06  -22756.26    -0.12
 14   9.0601  59741.45     0.07  -22756.44    -0.03
 15   9.0602  59740.46     0.05  -22756.61     0.07
 16   9.0602  59739.47     0.03  -22756.96    -0.01
 17   9.9555  69951.98    -0.16  -24834.74     0.02
 18   9.9556  69950.92    -0.10  -24834.73     0.15
 19   9.9556  69949.71    -0.18  -24835.13    -0.12
 20   9.9557  69948.71    -0.06  -24835.31    -0.17
 21  10.0184  68061.95     0.17  -25113.00     0.00
 22  10.0184  68060.76     0.09  -25113.30    -0.08
 23  10.0185  68059.37    -0.18  -25113.54    -0.11
 24  10.0185  68058.39    -0.04  -25113.84    -0.19

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.

12FL84    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       102.536   102.671   102.401
ecceobj         0.624     0.624     0.623
incobj         26.040    26.040    26.040
qmin           36.737    36.802    36.779
qmax          176.002   176.775   176.399
amean         103.919   104.327   104.107
amin          101.865   102.404   102.241
amax          106.924   107.263   107.096
emean           0.631     0.632     0.631
emin            0.617     0.617     0.617
emax            0.646     0.648     0.647
imean          24.787    24.817    24.821
imin           23.907    23.896    23.919
imax           25.902    25.932    25.861
excite_mean     0.757     0.759     0.758
fracstop        1.000     1.000     1.000
cjmean          2.907     2.907     2.907

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       218.0     221.0     216.4
kozaiamp         75.0      80.0      74.8