Orbit Fit and Astrometric record for 12UD185

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: 12UD185   
# Created Fri Dec  3 02:11:28 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     55 observations of     55
# Arc:  12.12y
# First observation: 2008/11/29
#  Last observation: 2021/01/11
# Chi-squared of fit:    49.43 DOF:    104 RMS:  0.17
# Min/Max residuals:    -0.51    0.50
# Exact a, adot, b, bdot, g, gdot:
  1.576167E-05  3.305496E-02 -6.621654E-06 -1.436469E-02  3.272446E-02  1.093249E-04
# Covariance matrix:
  4.1288E-13 -9.8162E-14 -9.2181E-14  3.2857E-14 -6.4425E-14 -1.5924E-13
 -9.8162E-14  3.1419E-14  3.5018E-14 -1.2330E-14  3.3601E-15  5.9265E-14
 -9.2181E-14  3.5018E-14  2.1428E-13 -3.5382E-14 -1.8051E-15  7.2728E-14
  3.2857E-14 -1.2330E-14 -3.5382E-14  8.1224E-15 -1.1228E-16 -2.5579E-14
 -6.4425E-14  3.3601E-15 -1.8051E-15 -1.1228E-16  1.0372E-13  2.9912E-15
 -1.5924E-13  5.9265E-14  7.2728E-14 -2.5579E-14  2.9912E-15  1.2285E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   16.229958   33.432752   -0.556227    0.228906   -0.786189  2454799.895654
# Heliocentric elements and errors
Epoch:              2454800.5000  =  2008/11/30
Mean Anomaly:          145.43705 +/-     0.028
Argument of Peri:      356.79684 +/-     0.026
Long of Asc Node:      246.16318 +/-     0.000
Inclination:            28.32953 +/-     0.000
Eccentricity:         0.04395995 +/-    0.0000
Semi-Major Axis:     30.23679566 +/-    0.0011
Time of Perihelion: 2430266.1453 +/-       5.0
Perihelion:          28.90758774 +/-    0.0013
Aphelion:            31.56600358 +/-    0.0014
Period (y)              166.2692 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.86411029 +/-    0.0002
Ecliptic Y           17.07646462 +/-    0.0002
Ecliptic Z            8.54059253 +/-    0.0001
Ecliptic XDOT        -0.00123027 +/-    0.0000
Ecliptic YDOT         0.00250051 +/-    0.0000
Ecliptic ZDOT        -0.00115146 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.34917136 +/-    0.0002
Geocenter to KBO     30.55822147 +/-    0.0003
# Hcoef:  7.57

The following table shows the complete astrometric record for 12UD185. 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 (12UD185) followed by the observatory code and reference code for the source of the astrometry.

2008 11  29.39490  01 40 07.50   +27 49 49.1   22.4G 12UD185   568  C~4Z6Y      
2008 11  29.40362  01 40 07.45   +27 49 48.7   21.8I 12UD185   568  C~4Z6Y      
2010 10  15.54770  02 03 34.752  +28 12 56.26  21.8G 12UD185   F51  C~3462      
2010 10  15.56007  02 03 34.674  +28 12 56.31  22.5G 12UD185   F51  C~3462      
2012 10  23.49388  02 21 18.600  +27 45 43.08  22.3G 12UD185   F51  C~3462      
2012 10  23.50900  02 21 18.483  +27 45 42.52  22.5G 12UD185   F51  C~3462      
2012 10  23.52415  02 21 18.384  +27 45 41.95  22.3G 12UD185   F51  C~3462      
2012 10  23.53933  02 21 18.272  +27 45 41.34  22.3G 12UD185   F51  C~3462      
2012 10  24.54037  02 21 11.518  +27 45 05.20  22.5G 12UD185   F51  C~3462      
2012 10  24.55411  02 21 11.422  +27 45 04.74  22.9G 12UD185   F51  C~3462      
2012 11  03.49690  02 20 03.745  +27 38 37.47  21.6G 12UD185   F51  C~3462      
2012 11  05.44831  02 19 50.496  +27 37 15.30  22.5G 12UD185   F51  C~3462      
2012 11  05.46049  02 19 50.403  +27 37 14.87  22.8G 12UD185   F51  C~3462      
2014 10  28.48102  02 39 15.913  +27 12 02.94  22.1G 12UD185   F51  C~3462      
2014 10  28.49402  02 39 15.834  +27 12 02.74  22.5G 12UD185   F51  C~3462      
2014 10  28.50710  02 39 15.738  +27 12 02.07  22.3G 12UD185   F51  C~3462      
2014 10  28.52016  02 39 15.663  +27 12 01.59  22.6G 12UD185   F51  C~3462      
2014 11  25.25916  02 36 09.706  +26 53 14.03  22.1G 12UD185   F51  C~3462      
2014 11  25.28295  02 36 09.525  +26 53 13.73  22.3G 12UD185   F51  C~3462      
2014 11  25.29540  02 36 09.506  +26 53 12.54  21.8G 12UD185   F51  C~3462      
2014 11  27.40658  02 35 56.377  +26 51 38.52  22.5G 12UD185   F51  C~3462      
2014 11  27.41884  02 35 56.326  +26 51 37.76  22.3G 12UD185   F51  C~3462      
2014 11  27.43113  02 35 56.221  +26 51 37.33  22.9G 12UD185   F51  C~3462      
2014 11  27.44340  02 35 56.119  +26 51 36.63  23.0G 12UD185   F51  C~3462      
2014 12  07.42695  02 34 58.376  +26 44 03.69  22.6G 12UD185   F51  C~3462      
2016 07  13.59414  03 00 24.432  +26 34 13.02  23.2G 12UD185   F51  C~3462      
2016 07  13.59889  03 00 24.470  +26 34 13.44  22.3G 12UD185   F51  C~3462      
2016 07  13.60365  03 00 24.514  +26 34 13.57  22.6G 12UD185   F51  C~3462      
2016 07  13.60839  03 00 24.536  +26 34 13.84  22.1G 12UD185   F51  C~3462      
2016 10  08.40529  02 59 30.066  +26 40 59.13  22.8G 12UD185   F51  C~3462      
2016 10  08.41657  02 59 30.006  +26 40 58.78  22.5G 12UD185   F51  C~3462      
2016 10  08.42791  02 59 29.940  +26 40 58.67  22.5G 12UD185   F51  C~3463      
2016 10  08.43931  02 59 29.863  +26 40 58.32  22.1G 12UD185   F51  C~3463      
2017 09  01.54142  03 10 38.101  +26 23 13.59  22.3G 12UD185   F51  C~3463      
2017 09  01.56344  03 10 38.087  +26 23 13.24  22.0G 12UD185   F51  C~3463      
2017 09  01.57448  03 10 38.045  +26 23 13.80  23.1G 12UD185   F51  C~3463      
2017 10  29.38584  03 06 19.644  +26 08 31.79  22.2G 12UD185   F51  C~3463      
2017 10  29.39683  03 06 19.559  +26 08 31.55  21.8G 12UD185   F51  C~3463      
2017 10  29.40786  03 06 19.504  +26 08 31.05  22.6G 12UD185   F51  C~3463      
2017 11  18.28798  03 04 03.379  +25 56 55.99  21.8G 12UD185   F51  C~3463      
2017 11  18.30035  03 04 03.281  +25 56 55.53  22.1G 12UD185   F51  C~3463      
2017 11  18.31271  03 04 03.198  +25 56 54.96  22.0G 12UD185   F51  C~3463      
2017 11  18.32518  03 04 03.114  +25 56 54.57  22.6G 12UD185   F51  C~3463      
2017 11  19.33349  03 03 56.264  +25 56 15.96  22.5G 12UD185   F51  C~3463      
2017 11  19.34531  03 03 56.149  +25 56 15.75  22.2G 12UD185   F51  C~3463      
2017 11  19.35720  03 03 56.076  +25 56 15.05  22.3G 12UD185   F51  C~3463      
2017 11  19.36901  03 03 55.975  +25 56 14.52  21.8G 12UD185   F51  C~3463      
2018 01  05.33830  02 59 46.481  +25 25 28.03  23.3G 12UD185   F51  C~3463      
2020 10  25.55239  03 33 16.302  +24 48 49.30  22.4w 12UD185   F51  C~4J39      
2020 10  25.56599  03 33 16.207  +24 48 49.06  22.3w 12UD185   F51  C~4J39      
2020 10  25.57966  03 33 16.128  +24 48 48.67  22.3w 12UD185   F51  C~4J39      
2020 10  25.59324  03 33 16.053  +24 48 48.25  22.2w 12UD185   F51  C~4J39      
2021 01  11.135880 03 25 38.120  +24 06 24.64  22.4G 12UD185   G37  C~4U93      
2021 01  11.201930 03 25 37.907  +24 06 22.86        12UD185   G37  C~4U93      
2021 01  11.247080 03 25 37.771  +24 06 21.47        12UD185   G37  C~4U93      

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    -0.04
     2   0.0000      0.00    -0.05       0.00     0.03
     3   1.8758      0.00    -0.08       0.00    -0.21
     4   1.8759      0.00    -0.00       0.00     0.26
     5   3.8990      0.00     0.05       0.00     0.06
     6   3.8990      0.00    -0.15       0.00     0.04
     7   3.8991      0.00    -0.07       0.00     0.02
     8   3.8991      0.00    -0.19       0.00    -0.04
     9   3.9018      0.00     0.12       0.00    -0.10
    10   3.9019      0.00     0.10       0.00    -0.05
    11   3.9291      0.00     0.21       0.00     0.37
    12   3.9344      0.00     0.01       0.00    -0.06
    13   3.9345      0.00    -0.13       0.00     0.03
    14   5.9113      0.00    -0.10       0.00    -0.06
    15   5.9113      0.00     0.06       0.00     0.20
    16   5.9113      0.00    -0.02       0.00    -0.01
    17   5.9114      0.00     0.21       0.00    -0.03
    18   5.9873      0.00    -0.05       0.00    -0.51
    19   5.9874      0.00    -0.49       0.00     0.25
    20   5.9874      0.00     0.42       0.00    -0.39
    21   5.9932      0.00     0.11       0.00     0.22
    22   5.9932      0.00     0.50       0.00     0.01
    23   5.9933      0.00     0.08       0.00     0.14
    24   5.9933      0.00    -0.30       0.00    -0.00
    25   6.0206      0.00    -0.25       0.00    -0.06
    26   7.6200      0.00    -0.29       0.00    -0.30
    27   7.6200      0.00    -0.06       0.00    -0.00
    28   7.6200      0.00     0.26       0.00     0.00
    29   7.6200      0.00     0.25       0.00     0.15
    30   7.8577      0.00    -0.02       0.00     0.03
    31   7.8577      0.00     0.05       0.00    -0.09
    32   7.8577      0.00     0.04       0.00     0.04
    33   7.8578      0.00    -0.14       0.00    -0.08
    34   8.7560      0.00     0.01       0.00     0.02
    35   8.7561      0.00     0.27       0.00    -0.38
    36   8.7561      0.00    -0.13       0.00     0.16
    37   8.9144      0.00    -0.04       0.00    -0.03
    38   8.9144      0.00    -0.19       0.00     0.07
    39   8.9145      0.00     0.11       0.00    -0.09
    40   8.9689      0.00     0.10       0.00     0.02
    41   8.9689      0.00    -0.08       0.00     0.02
    42   8.9690      0.00    -0.04       0.00    -0.08
    43   8.9690      0.00    -0.00       0.00     0.00
    44   8.9718      0.00     0.34       0.00     0.01
    45   8.9718      0.00    -0.16       0.00     0.25
    46   8.9718      0.00    -0.02       0.00     0.01
    47   8.9719      0.00    -0.30       0.00    -0.07
    48   9.1005      0.00    -0.05       0.00     0.09
    49  11.9046      0.00    -0.03       0.00     0.01
    50  11.9046      0.00    -0.15       0.00     0.12
    51  11.9047      0.00    -0.04       0.00     0.09
    52  11.9047      0.00     0.13       0.00     0.03
    53  12.1170      0.00     0.07       0.00    -0.12
    54  12.1172      0.00     0.04       0.00     0.06
    55  12.1173      0.00     0.14       0.00     0.01

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.

12UD185    quality flag:3

Type:            1:1       1:1       1:1

axisobj        30.400    30.400    30.400
ecceobj         0.039     0.039     0.039
incobj         28.251    28.251    28.251
qmin           27.702    27.674    27.680
qmax           32.627    32.633    32.680
amean          30.109    30.109    30.109
amin           29.795    29.795    29.793
amax           30.458    30.458    30.458
emean           0.050     0.050     0.050
emin            0.024     0.024     0.024
emax            0.077     0.076     0.077
imean          29.552    29.552    29.556
imin           29.383    29.383    29.383
imax           29.738    29.738    29.744
excite_mean     0.496     0.496     0.496
fracstop        1.000     1.000     1.000
cjmean          2.736     2.736     2.736

libcent 0        61.6      61.9      62.1
libamp  0        25.0      24.8      25.4
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       173.1     173.1     173.2
kozaiamp        180.0     180.0     180.0