Orbit Fit and Astrometric record for 12DB99

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: 12DB99    
# Created Tue Jul 17 01:37:56 2018
# Orbit generated from Bernstein formalism
# Fitting   35 observations of   36
# Arc:  11.06y
# First observation: 2003/04/01
#  Last observation: 2014/04/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000395   0.026742  -0.000017  -0.003002   0.024090   0.000000
# Chi-squared of fit:    34.03 DOF:   64 RMS:  0.17
# Min/Max residuals:    -0.45    0.45
# Exact a, adot, b, bdot, g, gdot:
  1.645038E-05  2.760126E-02 -1.156322E-06 -3.103601E-03  2.709917E-02  5.063212E-03
# Covariance matrix:
  4.8808E-13 -1.0853E-13 -5.7188E-15  6.9601E-15 -5.1282E-14 -2.2170E-13
 -1.0853E-13  8.7196E-14  7.3758E-15 -9.2418E-15  3.3015E-14  2.9264E-13
 -5.7188E-15  7.3758E-15  4.3890E-13 -4.7482E-14  4.1403E-15  2.6426E-14
  6.9601E-15 -9.2418E-15 -4.7482E-14  6.5608E-15 -3.3731E-15 -3.3110E-14
 -5.1282E-14  3.3015E-14  4.1403E-15 -3.3731E-15  2.4529E-13  1.1839E-13
 -2.2170E-13  2.9264E-13  2.6426E-14 -3.3110E-14  1.1839E-13  1.0484E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.467235  179.802671   -0.201303    0.127040   -0.969391  2452730.854846
# Heliocentric elements and errors
Epoch:              2452730.5000  =  2003/04/01
Mean Anomaly:           65.55953 +/-     0.012
Argument of Peri:       43.99965 +/-     0.016
Long of Asc Node:       48.44890 +/-     0.001
Inclination:             9.69526 +/-     0.000
Eccentricity:         0.19195031 +/-    0.0000
Semi-Major Axis:     39.68503376 +/-    0.0031
Time of Perihelion: 2436101.2788 +/-       2.4
Perihelion:          32.06747936 +/-    0.0029
Aphelion:            47.30258816 +/-    0.0040
Period (y)              250.0048 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.56868445 +/-    0.0007
Ecliptic Y           -0.06814520 +/-    0.0000
Ecliptic Z            4.79568010 +/-    0.0001
Ecliptic XDOT        -0.00056391 +/-    0.0000
Ecliptic YDOT        -0.00279144 +/-    0.0000
Ecliptic ZDOT        -0.00024423 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.87359559 +/-    0.0007
Geocenter to KBO     36.90150475 +/-    0.0007
# Hcoef:  6.25

The following table shows the complete astrometric record for 12DB99. 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 (12DB99) followed by the observatory code and reference code for the source of the astrometry.

2003 04  01.354103 12 11 12.95   +06 55 34.9   21.7V 12DB99    645  C~2VVI      
2003 04  01.354933 12 11 12.95   +06 55 35.0   21.1V 12DB99    645  C~2VVI      
2003 04  01.357420 12 11 12.95   +06 55 35.1   22.6V 12DB99    645  C~2VVI      
2010 02  20.51063  12 51 19.065  +01 09 15.59  21.4r 12DB99    F51  C~1w3p      
2010 08  05.25850  12 45 16.066  +01 29 06.37  22.3w 12DB99    F51  C~1w3p      
2011 03  10.57222  12 55 12.221  +00 32 40.30  22.4r 12DB99    F51  C~1w3p      
2011 03  12.57825  12 55 03.483  +00 33 39.01  22.1i 12DB99    F51  C~1w3p      
2011 03  12.59143  12 55 03.437  +00 33 39.66  22.0i 12DB99    F51  C~1w3p      
2011 03  14.56732  12 54 54.705  +00 34 37.91  22.3r 12DB99    F51  C~1w3p      
2011 03  15.56230  12 54 50.275  +00 35 07.15  21.9i 12DB99    F51  C~1w3q      
2012 02  28.53448  13 00 52.480  -00 16 38.54  22.8w 12DB99    F51  C~1w3q      
2012 02  28.54889  13 00 52.429  -00 16 38.25  22.9w 12DB99    F51  C~1w3q      
2012 02  28.56333  13 00 52.372  -00 16 37.97  22.9w 12DB99    F51  C~1w3q      
2012 04  12.34716  12 57 35.392  +00 04 06.46  22.3w 12DB99    F51  C~1w3q      
2012 04  12.36107  12 57 35.326  +00 04 06.82  22.0w 12DB99    F51  C~1w3q      
2012 04  12.37507  12 57 35.259  +00 04 07.17  22.0w 12DB99    F51  C~1w3q      
2012 04  12.38905  12 57 35.181  +00 04 07.53  21.9w 12DB99    F51  C~1w3q      
2012 04  15.48813  12 57 20.398  +00 05 28.70  21.9r 12DB99    F51  C~1w3q      
2012 12  22.61467  13 06 38.196  -01 12 49.37  22.2w 12DB99    F51  C~1w3q      
2012 12  22.61927  13 06 38.216  -01 12 49.53  22.2w 12DB99    F51  C~1w3q      
2012 12  22.62389  13 06 38.211  -01 12 49.34  22.3w 12DB99    F51  C~1w3q      
2012 12  22.62849  13 06 38.218  -01 12 49.53  22.2w 12DB99    F51  C~1w3q      
2013 03  19.49368  13 04 27.816  -00 51 33.48  22.3w 12DB99    F51  C~1w3q      
2013 03  19.50909  13 04 27.742  -00 51 33.01  22.1w 12DB99    F51  C~1w3q      
2013 03  19.52451  13 04 27.655  -00 51 32.72  21.9w 12DB99    F51  C~1w3q      
2013 03  19.53993  13 04 27.605  -00 51 32.24  21.9w 12DB99    F51  C~1w3q      
2013 04  05.44400  13 03 07.990  -00 43 27.80  21.9r 12DB99    F51  C~1w3q      
2013 04  11.37449  13 02 39.489  -00 40 45.03  22.2w 12DB99    F51  C~1w3q      
2013 04  11.38815  13 02 39.422  -00 40 44.72  22.2w 12DB99    F51  C~1w3q      
2013 04  11.40185  13 02 39.356  -00 40 44.11  22.0w 12DB99    F51  C~1w3q      
2013 04  11.41561  13 02 39.288  -00 40 43.97  22.3w 12DB99    F51  C~1w3q      
2013 04  20.46728  13 01 56.428  -00 36 50.94  21.8i 12DB99    F51  C~1w3q      
2013 05  02.33024  13 01 03.397  -00 32 23.54  21.6r 12DB99    F51  C~1w3q      
2014 04  24.34613  13 06 35.513  -01 19 17.06  22.2w 12DB99    F51  C~1w3q      
2014 04  24.35736  13 06 35.436  -01 19 16.23  21.8w 12DB99    F51  C~1w3q      
2014 04  24.37991  13 06 35.305  -01 19 16.23  22.1w 12DB99    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    -0.07       0.00    -0.14
  2   0.0000     -0.04    -0.04       0.09    -0.04
  3   0.0000     -0.08     0.11       0.18     0.06
  4   6.8916  41899.87     0.06   -4360.98     0.17
  5   7.3454  36253.52    -0.27   -5523.63     0.04
  6   7.9404  46179.76     0.44   -4942.94     0.13
  7   7.9459  46028.93    -0.09   -4943.10    -0.21
  8   7.9459  46027.99    -0.02   -4942.78     0.12
  9   7.9513  45877.50    -0.12   -4943.32     0.07
 10   7.9540  45801.30     0.24   -4943.89     0.00
 11   8.9122  52388.64    -0.02   -5569.87     0.15
 12   8.9122  52387.77     0.07   -5569.92     0.08
 13   8.9123  52386.82     0.07   -5570.02    -0.03
 14   9.0322  48987.39    -0.04   -5645.66     0.11
 15   9.0322  48986.28    -0.01   -5645.74     0.11
 16   9.0322  48985.16     0.02   -5645.83     0.10
 17   9.0323  48983.87    -0.12   -5645.99     0.03
 18   9.0408  48735.14    -0.29   -5663.11     0.12
 19   9.7283  58954.30    -0.08   -6563.66    -0.14
 20   9.7283  58954.67     0.11   -6563.69    -0.19
 21   9.7283  58954.51    -0.22   -6563.54    -0.08
 22   9.7283  58954.70    -0.21   -6563.67    -0.25
 23   9.9662  56463.68     0.07   -6182.25     0.03
 24   9.9662  56462.38     0.01   -6182.27     0.03
 25   9.9662  56460.97    -0.15   -6182.55    -0.22
 26   9.9663  56460.03     0.14   -6182.41    -0.05
 27  10.0126  55077.88    -0.45   -6229.49    -0.33
 28  10.0288  54588.95     0.04   -6256.40    -0.10
 29  10.0288  54587.83     0.07   -6256.53    -0.15
 30  10.0289  54586.60    -0.03   -6256.37     0.08
 31  10.0289  54585.54     0.06   -6256.67    -0.14
 32  10.0537  53856.56     0.39   -6308.20    -0.07
 33  10.0862  52965.56     0.33   -6391.61     0.45
 34  11.0636  59089.14 (   0.68)  -6949.36 (   0.06)
 35  11.0637  59087.63     0.06   -6949.06     0.44
 36  11.0637  59085.69    -0.08   -6949.90    -0.23

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.

12DB99    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.319    39.328    39.310
ecceobj         0.190     0.191     0.190
incobj          9.712     9.712     9.712
qmin           31.365    31.345    31.356
qmax           48.188    48.078    48.134
amean          39.456    39.456    39.456
amin           39.048    39.040    39.046
amax           39.950    39.952    39.948
emean           0.186     0.186     0.186
emin            0.165     0.166     0.167
emax            0.207     0.206     0.207
imean           8.578     8.576     8.577
imin            7.963     7.968     7.959
imax            9.352     9.345     9.357
excite_mean     0.238     0.238     0.239
fracstop        1.000     1.000     1.000
cjmean          2.987     2.987     2.987

libcent 0       180.1     180.0     179.9
libamp  0        71.8      75.0      71.1
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       183.1     183.2     183.2
kozaiamp        180.0     180.0     180.0