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 Apr 23 01:09:46 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  101 observations of  101
# Arc:  15.13y
# First observation: 2003/04/01
#  Last observation: 2018/05/19
# Chi-squared of fit:   110.32 DOF:  196 RMS:  0.18
# Min/Max residuals:    -0.61    0.64
# Exact a, adot, b, bdot, g, gdot:
  1.682594E-05  2.760020E-02 -4.398910E-07 -3.103592E-03  2.709789E-02  5.058961E-03
# Covariance matrix:
  4.6857E-13 -8.1812E-14 -2.4723E-14  6.9134E-15 -4.0647E-14 -1.2875E-13
 -8.1812E-14  1.9310E-14  6.9937E-15 -1.9802E-15  7.5963E-15  3.6912E-14
 -2.4723E-14  6.9937E-15  2.5201E-13 -2.1036E-14  3.8327E-15  1.4664E-14
  6.9134E-15 -1.9802E-15 -2.1036E-14  1.9748E-15 -7.3898E-16 -4.1685E-15
 -4.0647E-14  7.5963E-15  3.8327E-15 -7.3898E-16  5.9316E-14  1.3285E-14
 -1.2875E-13  3.6912E-14  1.4664E-14 -4.1685E-15  1.3285E-14  7.7728E-14
#      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:           65.55388 +/-     0.006
Argument of Peri:       44.02239 +/-     0.008
Long of Asc Node:       48.44794 +/-     0.000
Inclination:             9.69547 +/-     0.000
Eccentricity:         0.19181879 +/-    0.0000
Semi-Major Axis:     39.68739037 +/-    0.0015
Time of Perihelion: 2436101.2306 +/-       1.8
Perihelion:          32.07460321 +/-    0.0013
Aphelion:            47.30017753 +/-    0.0018
Period (y)              250.0271 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.57040295 +/-    0.0003
Ecliptic Y           -0.06815317 +/-    0.0000
Ecliptic Z            4.79593200 +/-    0.0000
Ecliptic XDOT        -0.00056351 +/-    0.0000
Ecliptic YDOT        -0.00279147 +/-    0.0000
Ecliptic ZDOT        -0.00024430 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.87521895 +/-    0.0003
Geocenter to KBO     36.90316795 +/-    0.0003
# Hcoef:  6.35

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 01  16.60179  12 57 23.677  +00 13 55.27  22.0G 12DB99    F51  C~2rXs      
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      
2015 01  23.59912  13 16 43.592  -02 37 32.99  22.4G 12DB99    F51  C~2rXs      
2015 01  23.61077  13 16 43.598  -02 37 32.98  22.5G 12DB99    F51  C~2rXs      
2015 01  23.62239  13 16 43.584  -02 37 32.75  22.4G 12DB99    F51  C~2rXs      
2015 01  23.63399  13 16 43.589  -02 37 32.59  22.0G 12DB99    F51  C~2rXs      
2015 01  25.59142  13 16 42.667  -02 37 14.92  22.3G 12DB99    F51  C~2rXs      
2015 01  25.60310  13 16 42.653  -02 37 15.00  22.7G 12DB99    F51  C~2rXs      
2015 01  25.61464  13 16 42.644  -02 37 14.76  22.4G 12DB99    F51  C~2rXs      
2015 01  25.62617  13 16 42.640  -02 37 14.61  22.5G 12DB99    F51  C~2rXs      
2015 04  20.37987  13 11 48.648  -02 04 28.40  22.6G 12DB99    F51  C~2rXs      
2015 04  20.39341  13 11 48.576  -02 04 28.35  22.1G 12DB99    F51  C~2rXs      
2015 04  20.40692  13 11 48.494  -02 04 27.52  23.0G 12DB99    F51  C~2rXs      
2015 04  20.42037  13 11 48.444  -02 04 27.69  21.9G 12DB99    F51  C~2rXs      
2015 04  21.40290  13 11 43.868  -02 04 03.00  21.5G 12DB99    F51  C~2rXs      
2015 04  21.41645  13 11 43.796  -02 04 02.65  21.9G 12DB99    F51  C~2rXs      
2015 04  21.43001  13 11 43.709  -02 04 02.64  22.3G 12DB99    F51  C~2rXs      
2015 05  24.30857  13 09 30.144  -01 53 44.12  22.2G 12DB99    F51  C~2rXs      
2015 06  03.33462  13 09 01.597  -01 52 14.38  22.8G 12DB99    F51  C~2rXs      
2015 08  08.25300  13 09 23.793  -02 05 18.59  22.6G 12DB99    F51  C~2rXs      
2016 01  15.60319  13 21 27.632  -03 20 18.64  22.3G 12DB99    F51  C~2rXs      
2016 02  04.62206  13 21 19.262  -03 17 32.54  22.7G 12DB99    F51  C~2rXs      
2016 02  21.54265  13 20 43.835  -03 12 37.74  22.6G 12DB99    F51  C~2rXs      
2016 03  10.45649  13 19 42.988  -03 05 33.44  22.1G 12DB99    F51  C~2rXs      
2016 03  10.46832  13 19 42.927  -03 05 33.12  22.0G 12DB99    F51  C~2rXs      
2016 03  10.48016  13 19 42.876  -03 05 32.85  22.1G 12DB99    F51  C~2rXs      
2016 03  10.49199  13 19 42.827  -03 05 32.46  22.5G 12DB99    F51  C~2rXs      
2016 03  11.51604  13 19 38.729  -03 05 05.69  22.7G 12DB99    F51  C~2rXs      
2016 03  11.52728  13 19 38.726  -03 05 05.29  22.2G 12DB99    F51  C~2rXs      
2016 04  01.41497  13 18 06.623  -02 55 36.00  22.0G 12DB99    F51  C~2rXs      
2016 04  01.42836  13 18 06.556  -02 55 35.73  21.9G 12DB99    F51  C~2rXs      
2016 04  01.44179  13 18 06.498  -02 55 35.25  21.9G 12DB99    F51  C~2rXs      
2016 04  01.45528  13 18 06.429  -02 55 34.65  22.4G 12DB99    F51  C~2rXs      
2016 04  09.38631  13 17 28.794  -02 51 58.49  22.0G 12DB99    F51  C~2rXs      
2016 04  09.39822  13 17 28.736  -02 51 57.93  22.3G 12DB99    F51  C~2rXs      
2016 04  09.41021  13 17 28.670  -02 51 57.59  22.2G 12DB99    F51  C~2rXs      
2016 04  09.42215  13 17 28.605  -02 51 57.35  22.4G 12DB99    F51  C~2rXs      
2016 04  09.47884  13 17 28.330  -02 51 55.65  21.7G 12DB99    F51  C~2rXs      
2016 04  09.49248  13 17 28.275  -02 51 55.65  21.9G 12DB99    F51  C~2rXs      
2016 04  09.50582  13 17 28.200  -02 51 55.20  21.5G 12DB99    F51  C~2rXs      
2016 04  28.35916  13 15 59.923  -02 44 03.13  22.1G 12DB99    F51  C~2rXs      
2016 04  28.37034  13 15 59.880  -02 44 02.55  22.5G 12DB99    F51  C~2rXs      
2016 04  28.38155  13 15 59.809  -02 44 02.32  22.5G 12DB99    F51  C~2rXs      
2016 04  28.39271  13 15 59.771  -02 44 02.28  22.6G 12DB99    F51  C~2rXs      
2017 02  22.58066  13 25 25.263  -03 54 06.41  23.1G 12DB99    F51  C~2rXs      
2017 02  22.58798  13 25 25.203  -03 54 06.04  22.3G 12DB99    F51  C~2rXs      
2017 02  22.59188  13 25 25.207  -03 54 05.77  22.1G 12DB99    F51  C~2rXs      
2017 02  22.59851  13 25 25.189  -03 54 06.02  22.9G 12DB99    F51  C~2rXs      
2017 02  22.60242  13 25 25.182  -03 54 05.89  22.6G 12DB99    F51  C~2rXs      
2017 02  22.60907  13 25 25.161  -03 54 05.65  22.4G 12DB99    F51  C~2rXs      
2017 02  22.61295  13 25 25.156  -03 54 06.06  23.0G 12DB99    F51  C~2rXs      
2017 04  26.36853  13 20 59.308  -03 27 28.80  21.9G 12DB99    F51  C~2rXs      
2017 04  26.38986  13 20 59.226  -03 27 29.28  22.6G 12DB99    F51  C~2rXs      
2017 04  26.40055  13 20 59.160  -03 27 28.66  22.4G 12DB99    F51  C~2rXs      
2017 05  17.26086  13 19 31.234  -03 20 31.26  22.3G 12DB99    F51  C~2rXs      
2018 03  18.47342  13 28 46.605  -04 26 33.68  22.6G 12DB99    F51  C~2rXs      
2018 03  18.48525  13 28 46.568  -04 26 33.36  22.4G 12DB99    F51  C~2rXs      
2018 03  18.50902  13 28 46.462  -04 26 32.70  22.7G 12DB99    F51  C~2rXs      
2018 04  12.41498  13 26 53.196  -04 15 30.77  21.3G 12DB99    F51  C~2rXt      
2018 04  13.41961  13 26 48.449  -04 15 04.83  22.0G 12DB99    F51  C~2rXt      
2018 04  13.43161  13 26 48.381  -04 15 04.46  22.0G 12DB99    F51  C~2rXt      
2018 04  13.44360  13 26 48.323  -04 15 03.95  22.2G 12DB99    F51  C~2rXt      
2018 04  13.45557  13 26 48.259  -04 15 03.70  22.3G 12DB99    F51  C~2rXt      
2018 05  19.32801  13 24 10.550  -04 02 01.60  22.7G 12DB99    F51  C~2rXt      
2018 05  19.33998  13 24 10.498  -04 02 01.38  22.4G 12DB99    F51  C~2rXt      
2018 05  19.36395  13 24 10.444  -04 02 01.04  22.7G 12DB99    F51  C~2rXt      

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    -0.25       0.00    -0.20
  2   0.0000      0.00    -0.19       0.00    -0.12
  3   0.0000      0.00    -0.00       0.00    -0.09
  4   6.8916      0.00     0.45       0.00    -0.06
  5   7.3454      0.00    -0.07       0.00     0.04
  6   7.7953      0.00     0.13       0.00     0.29
  7   7.9404      0.00     0.64       0.00    -0.15
  8   7.9459      0.00     0.04       0.00    -0.24
  9   7.9459      0.00     0.23       0.00     0.02
 10   7.9513      0.00     0.12       0.00     0.01
 11   7.9540      0.00     0.41       0.00    -0.18
 12   8.9122      0.00     0.14       0.00     0.13
 13   8.9122      0.00     0.19       0.00     0.04
 14   8.9123      0.00     0.15       0.00    -0.06
 15   9.0322      0.00     0.05       0.00     0.14
 16   9.0322      0.00     0.07       0.00     0.13
 17   9.0322      0.00     0.09       0.00     0.11
 18   9.0323      0.00    -0.06       0.00     0.09
 19   9.0408      0.00    -0.17       0.00     0.25
 20   9.7283      0.00    -0.13       0.00    -0.02
 21   9.7283      0.00     0.01       0.00    -0.14
 22   9.7283      0.00    -0.23       0.00     0.08
 23   9.7283      0.00    -0.28       0.00    -0.07
 24   9.9662      0.00    -0.01       0.00     0.12
 25   9.9662      0.00    -0.06       0.00     0.14
 26   9.9662      0.00    -0.30       0.00    -0.01
 27   9.9663      0.00     0.02       0.00     0.02
 28  10.0126      0.00    -0.61       0.00     0.01
 29  10.0288      0.00    -0.11       0.00     0.03
 30  10.0288      0.00    -0.11       0.00    -0.03
 31  10.0289      0.00    -0.10       0.00     0.22
 32  10.0289      0.00    -0.11       0.00    -0.01
 33  10.0537      0.00     0.19       0.00    -0.07
 34  10.0862      0.00     0.33       0.00     0.42
 35  11.0636      0.00     0.30       0.00     0.07
 36  11.0637      0.00    -0.07       0.00     0.63
 37  11.0637      0.00    -0.45       0.00     0.10
 38  11.8145      0.00    -0.12       0.00    -0.00
 39  11.8145      0.00     0.05       0.00    -0.09
 40  11.8146      0.00    -0.08       0.00     0.04
 41  11.8146      0.00     0.07       0.00     0.10
 42  11.8200      0.00     0.11       0.00     0.02
 43  11.8200      0.00     0.01       0.00    -0.18
 44  11.8200      0.00    -0.01       0.00    -0.05
 45  11.8200      0.00     0.04       0.00    -0.01
 46  12.0521      0.00     0.05       0.00     0.05
 47  12.0521      0.00    -0.06       0.00    -0.24
 48  12.0522      0.00    -0.32       0.00     0.25
 49  12.0522      0.00    -0.11       0.00    -0.25
 50  12.0549      0.00     0.24       0.00     0.04
 51  12.0549      0.00     0.12       0.00     0.05
 52  12.0550      0.00    -0.21       0.00    -0.27
 53  12.1450      0.00    -0.04       0.00    -0.00
 54  12.1724      0.00    -0.06       0.00    -0.32
 55  12.3529      0.00     0.03       0.00    -0.10
 56  12.7919      0.00    -0.05       0.00     0.25
 57  12.8467      0.00     0.23       0.00     0.07
 58  12.8931      0.00    -0.14       0.00    -0.01
 59  12.9421      0.00     0.13       0.00    -0.04
 60  12.9421      0.00    -0.07       0.00    -0.03
 61  12.9422      0.00    -0.12       0.00    -0.07
 62  12.9422      0.00    -0.14       0.00     0.01
 63  12.9450      0.00    -0.53       0.00     0.09
 64  12.9450      0.00     0.11       0.00     0.19
 65  13.0022      0.00    -0.03       0.00    -0.07
 66  13.0023      0.00    -0.07       0.00    -0.17
 67  13.0023      0.00     0.02       0.00    -0.06
 68  13.0023      0.00    -0.04       0.00     0.17
 69  13.0240      0.00     0.06       0.00    -0.25
 70  13.0241      0.00     0.06       0.00    -0.01
 71  13.0241      0.00    -0.06       0.00     0.00
 72  13.0241      0.00    -0.16       0.00    -0.08
 73  13.0243      0.00    -0.15       0.00     0.10
 74  13.0243      0.00     0.02       0.00    -0.27
 75  13.0244      0.00    -0.14       0.00    -0.18
 76  13.0760      0.00     0.14       0.00    -0.12
 77  13.0760      0.00     0.26       0.00     0.21
 78  13.0761      0.00    -0.03       0.00     0.18
 79  13.0761      0.00     0.17       0.00    -0.03
 80  13.8980      0.00     0.24       0.00    -0.10
 81  13.8980      0.00    -0.34       0.00     0.12
 82  13.8980      0.00    -0.11       0.00     0.31
 83  13.8980      0.00    -0.09       0.00    -0.08
 84  13.8980      0.00    -0.03       0.00    -0.03
 85  13.8980      0.00    -0.05       0.00     0.08
 86  13.8980      0.00     0.04       0.00    -0.41
 87  14.0699      0.00     0.02       0.00     0.43
 88  14.0699      0.00     0.29       0.00    -0.55
 89  14.0699      0.00     0.04       0.00    -0.18
 90  14.1271      0.00     0.05       0.00     0.38
 91  14.9627      0.00    -0.05       0.00    -0.03
 92  14.9627      0.00     0.15       0.00    -0.01
 93  14.9628      0.00     0.07       0.00     0.03
 94  15.0310      0.00    -0.29       0.00     0.16
 95  15.0337      0.00     0.13       0.00    -0.18
 96  15.0338      0.00    -0.02       0.00    -0.13
 97  15.0338      0.00    -0.02       0.00     0.07
 98  15.0338      0.00    -0.11       0.00     0.01
 99  15.1320      0.00    -0.01       0.00    -0.12
100  15.1321      0.00    -0.11       0.00    -0.09
101  15.1321      0.00     0.45       0.00    -0.13

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        39.321    39.321    39.321
ecceobj         0.190     0.190     0.190
incobj          9.713     9.713     9.713
qmin           31.362    31.362    31.363
qmax           48.025    48.026    48.024
amean          39.456    39.456    39.456
amin           39.033    39.033    39.033
amax           39.950    39.951    39.950
emean           0.186     0.186     0.186
emin            0.165     0.165     0.165
emax            0.204     0.204     0.204
imean           8.575     8.575     8.575
imin            7.959     7.959     7.959
imax            9.336     9.336     9.335
excite_mean     0.238     0.238     0.238
fracstop        1.000     1.000     1.000
cjmean          2.987     2.987     2.987

libcent 0       180.0     180.0     180.1
libamp  0        74.4      74.4      74.3
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     183.1     183.1
kozaiamp        180.0     180.0     180.0