Orbit Fit and Astrometric record for 12UE185

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: 12UE185   
# Created Sat Jun  6 01:10:52 2020
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   54 observations of   54
# Arc:   7.27y
# First observation: 2012/10/23
#  Last observation: 2020/01/29
# Chi-squared of fit:    79.56 DOF:  102 RMS:  0.21
# Min/Max residuals:    -0.76    0.95
# Exact a, adot, b, bdot, g, gdot:
  1.528867E-05  3.064914E-02  1.976268E-06  1.124818E-03  2.766977E-02  2.878897E-03
# Covariance matrix:
  1.9789E-13 -8.3179E-14  1.5278E-15  2.0878E-16 -2.3794E-15 -2.8864E-13
 -8.3179E-14  7.9164E-14  1.2705E-14  1.2858E-15  7.6036E-14  3.1557E-13
  1.5278E-15  1.2705E-14  1.1683E-13 -2.4938E-14  3.0876E-14  4.6353E-14
  2.0878E-16  1.2858E-15 -2.4938E-14  7.8979E-15  3.2042E-15  4.6456E-15
 -2.3794E-15  7.6036E-14  3.0876E-14  3.2042E-15  1.6784E-13  2.8703E-13
 -2.8864E-13  3.1557E-13  4.6353E-14  4.6456E-15  2.8703E-13  1.4242E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -20.436645  118.328365    0.991465   -0.012180   -0.032844  2456224.105978
# Heliocentric elements and errors
Epoch:              2456224.5000  =  2012/10/24
Mean Anomaly:           21.71000 +/-     0.011
Argument of Peri:      244.46260 +/-     0.016
Long of Asc Node:      202.24208 +/-     0.000
Inclination:            20.46399 +/-     0.000
Eccentricity:         0.15482902 +/-    0.0000
Semi-Major Axis:     42.06503849 +/-    0.0024
Time of Perihelion: 2450215.0103 +/-       3.1
Perihelion:          35.55214989 +/-    0.0026
Aphelion:            48.57792709 +/-    0.0032
Period (y)              272.8288 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -15.21282190 +/-    0.0002
Ecliptic Y           30.31352813 +/-    0.0004
Ecliptic Z          -12.61919542 +/-    0.0002
Ecliptic XDOT        -0.00282057 +/-    0.0000
Ecliptic YDOT        -0.00116782 +/-    0.0000
Ecliptic ZDOT         0.00000496 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.18813251 +/-    0.0004
Geocenter to KBO     36.14049408 +/-    0.0005
# Hcoef:  6.47

The following table shows the complete astrometric record for 12UE185. 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 (12UE185) followed by the observatory code and reference code for the source of the astrometry.

2012 10  23.60520  07 45 36.539  +00 26 37.25  21.7G 12UE185   F51  C~3463      
2012 10  23.61712  07 45 36.519  +00 26 37.19  21.2G 12UE185   F51  C~3463      
2012 10  27.64755  07 45 37.104  +00 24 16.78  20.7G 12UE185   F51  C~3463      
2012 10  29.60254  07 45 36.700  +00 23 11.72  22.8G 12UE185   F51  C~3463      
2012 10  29.61317  07 45 36.686  +00 23 11.61  21.7G 12UE185   F51  C~3463      
2012 12  23.46301  07 42 53.847  +00 05 56.81  21.7G 12UE185   F51  C~3463      
2012 12  23.47697  07 42 53.774  +00 05 56.78  22.0G 12UE185   F51  C~3463      
2013 01  08.47139  07 41 28.622  +00 07 07.67  22.0G 12UE185   F51  C~3463      
2013 12  23.49258  07 50 01.199  -00 10 24.67  21.6G 12UE185   F51  C~3463      
2013 12  26.53351  07 49 45.959  -00 10 25.88  22.5G 12UE185   F51  C~3463      
2013 12  26.54581  07 49 45.878  -00 10 25.75  21.7G 12UE185   F51  C~3463      
2014 11  23.60129  07 58 59.435  -00 20 36.48  22.1G 12UE185   F51  C~3463      
2014 11  23.61270  07 58 59.406  -00 20 37.06  21.8G 12UE185   F51  C~3463      
2014 11  23.63551  07 58 59.349  -00 20 37.36  22.5G 12UE185   F51  C~3463      
2014 12  15.53330  07 57 43.104  -00 26 06.78  23.0G 12UE185   F51  C~3463      
2015 12  08.54383  08 05 12.540  -00 41 06.55  22.6G 12UE185   F51  C~3463      
2015 12  08.55633  08 05 12.501  -00 41 06.72  22.1G 12UE185   F51  C~3463      
2015 12  08.56887  08 05 12.457  -00 41 06.84  22.2G 12UE185   F51  C~3463      
2015 12  08.58139  08 05 12.410  -00 41 07.05  22.3G 12UE185   F51  C~3463      
2015 12  24.66022  08 04 04.003  -00 43 03.73  21.5G 12UE185   F51  C~3463      
2016 01  09.43972  08 02 43.504  -00 41 59.56  22.0G 12UE185   F51  C~3463      
2016 01  09.45381  08 02 43.428  -00 41 59.48  22.2G 12UE185   F51  C~3463      
2016 01  09.46795  08 02 43.345  -00 41 59.28  22.0G 12UE185   F51  C~3463      
2016 01  09.48210  08 02 43.271  -00 41 59.19  22.0G 12UE185   F51  C~3463      
2016 01  11.46701  08 02 32.582  -00 41 38.53  22.0G 12UE185   F51  C~3463      
2016 01  11.47869  08 02 32.523  -00 41 38.35  22.1G 12UE185   F51  C~3463      
2016 01  11.49036  08 02 32.455  -00 41 38.29  21.9G 12UE185   F51  C~3463      
2016 01  11.50203  08 02 32.390  -00 41 38.10  21.8G 12UE185   F51  C~3463      
2016 01  12.43075  08 02 27.367  -00 41 27.39  22.3G 12UE185   F51  C~3463      
2016 01  12.44272  08 02 27.301  -00 41 27.37  22.3G 12UE185   F51  C~3463      
2016 01  12.45466  08 02 27.233  -00 41 27.15  22.6G 12UE185   F51  C~3463      
2016 01  12.46660  08 02 27.171  -00 41 27.03  21.9G 12UE185   F51  C~3463      
2016 02  26.34915  07 58 41.015  -00 23 04.29  21.4G 12UE185   F51  C~3463      
2016 02  26.36301  07 58 40.989  -00 23 03.60  21.2G 12UE185   F51  C~3463      
2016 03  08.24030  07 58 02.425  -00 16 38.78  22.2G 12UE185   F51  C~3463      
2016 03  10.24087  07 57 56.442  -00 15 25.76  22.2G 12UE185   F51  C~3463      
2016 03  10.25317  07 57 56.392  -00 15 25.34  22.2G 12UE185   F51  C~3463      
2016 03  10.26551  07 57 56.361  -00 15 24.96  22.6G 12UE185   F51  C~3463      
2016 03  10.27787  07 57 56.325  -00 15 24.43  22.2G 12UE185   F51  C~3463      
2016 03  25.24342  07 57 23.772  -00 06 12.80  21.9G 12UE185   F51  C~3463      
2016 03  25.26222  07 57 23.710  -00 06 12.20  22.7G 12UE185   F51  C~3463      
2016 03  25.27472  07 57 23.682  -00 06 11.81  21.6G 12UE185   F51  C~3463      
2016 03  25.28720  07 57 23.669  -00 06 11.58  22.0G 12UE185   F51  C~3463      
2017 01  31.36730  08 07 41.861  -00 51 51.26  21.5G 12UE185   F51  C~3463      
2017 01  31.37958  08 07 41.800  -00 51 51.09  21.6G 12UE185   F51  C~3463      
2017 01  31.39183  08 07 41.737  -00 51 50.60  21.6G 12UE185   F51  C~3463      
2017 01  31.40411  08 07 41.665  -00 51 50.24  21.5G 12UE185   F51  C~3463      
2017 03  13.32763  08 04 46.426  -00 29 55.84  22.7G 12UE185   F51  C~3463      
2020 01  23.14050  08 29 19.22   -01 43 07.1   21.6G 12UE185   X01  C~3qJa      
2020 01  23.23739  08 29 18.67   -01 43 05.3   21.2G 12UE185   X01  C~3qJa      
2020 01  23.29230  08 29 18.36   -01 43 04.2   21.5G 12UE185   X01  C~3qJa      
2020 01  29.42282  08 28 45.462  -01 41 00.46  21.9w 12UE185   F51  C~3cjl      
2020 01  29.43510  08 28 45.400  -01 41 00.45  22.0w 12UE185   F51  C~3cjl      
2020 01  29.44734  08 28 45.339  -01 40 59.96  21.8w 12UE185   F51  C~3cjl      

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     0.40       0.00    -0.36
  2   0.0000      0.00     0.05       0.00     0.01
  3   0.0111      0.00     0.09       0.00    -0.21
  4   0.0164      0.00    -0.61       0.00     0.71
  5   0.0164      0.00    -0.76       0.00     0.95
  6   0.1666      0.00     0.07       0.00    -0.10
  7   0.1667      0.00     0.06       0.00    -0.11
  8   0.2104      0.00     0.23       0.00    -0.06
  9   1.1660      0.00     0.42       0.00    -0.25
 10   1.1743      0.00     0.34       0.00     0.00
 11   1.1744      0.00     0.07       0.00     0.13
 12   2.0835      0.00     0.13       0.00     0.09
 13   2.0835      0.00     0.14       0.00    -0.24
 14   2.0836      0.00     0.18       0.00    -0.03
 15   2.1435      0.00     0.01       0.00    -0.32
 16   3.1237      0.00    -0.12       0.00    -0.04
 17   3.1238      0.00    -0.00       0.00    -0.05
 18   3.1238      0.00     0.05       0.00    -0.01
 19   3.1238      0.00     0.05       0.00    -0.06
 20   3.1678      0.00    -0.38       0.00     0.38
 21   3.2110      0.00    -0.04       0.00    -0.07
 22   3.2111      0.00    -0.03       0.00    -0.12
 23   3.2111      0.00    -0.12       0.00    -0.06
 24   3.2112      0.00    -0.07       0.00    -0.11
 25   3.2166      0.00    -0.03       0.00    -0.09
 26   3.2166      0.00     0.05       0.00    -0.04
 27   3.2167      0.00    -0.01       0.00    -0.11
 28   3.2167      0.00    -0.02       0.00    -0.05
 29   3.2192      0.00    -0.05       0.00     0.04
 30   3.2193      0.00    -0.05       0.00    -0.08
 31   3.2193      0.00    -0.08       0.00     0.00
 32   3.2193      0.00    -0.02       0.00    -0.02
 33   3.3422      0.00    -0.55       0.00    -0.06
 34   3.3423      0.00    -0.10       0.00     0.16
 35   3.3720      0.00    -0.12       0.00    -0.06
 36   3.3775      0.00     0.04       0.00     0.01
 37   3.3775      0.00    -0.16       0.00    -0.02
 38   3.3776      0.00    -0.07       0.00    -0.09
 39   3.3776      0.00    -0.05       0.00    -0.02
 40   3.4186      0.00     0.50       0.00     0.15
 41   3.4186      0.00     0.00       0.00     0.06
 42   3.4187      0.00    -0.13       0.00    -0.01
 43   3.4187      0.00    -0.05       0.00    -0.24
 44   4.2731      0.00     0.00       0.00     0.03
 45   4.2732      0.00     0.08       0.00    -0.09
 46   4.2732      0.00     0.13       0.00     0.10
 47   4.2732      0.00     0.05       0.00     0.17
 48   4.3853      0.00     0.16       0.00    -0.14
 49   7.2486      0.00     0.28       0.00    -0.02
 50   7.2488      0.00    -0.05       0.00     0.02
 51   7.2490      0.00    -0.21       0.00     0.12
 52   7.2658      0.00    -0.03       0.00     0.21
 53   7.2658      0.00     0.05       0.00    -0.05
 54   7.2658      0.00     0.13       0.00     0.17

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.

12UE185    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        42.076    42.076    42.076
ecceobj         0.155     0.155     0.155
incobj         20.444    20.444    20.444
qmin           34.745    34.785    34.780
qmax           49.326    49.325    49.280
amean          41.880    41.882    41.881
amin           41.523    41.522    41.524
amax           42.276    42.280    42.268
emean           0.149     0.149     0.149
emin            0.133     0.133     0.133
emax            0.168     0.168     0.168
imean          21.164    21.163    21.164
imin           20.494    20.512    20.515
imax           21.871    21.869    21.871
excite_mean     0.391     0.391     0.391
fracstop        1.000     1.000     1.000
cjmean          2.894     2.894     2.894

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       179.9     179.9     179.8
kozaiamp        179.9     180.0     179.9