Orbit Fit and Astrometric record for 12UT177

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: 12UT177   
# Created Sun Oct 22 01:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting   21 observations of   21
# Arc:   1.46y
# First observation: 2011/09/01
#  Last observation: 2013/02/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000010   0.015582  -0.000004   0.001193   0.019103   0.000000
# Chi-squared of fit:     6.72 DOF:   36 RMS:  0.10
# Min/Max residuals:    -0.22    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.324561E-05  1.559969E-02  5.934085E-07  1.175087E-03  1.918943E-02  1.290348E-03
# Covariance matrix:
  7.3611E-13 -4.1132E-13  6.0552E-15  2.2204E-14  2.7732E-13  2.0009E-11
 -4.1132E-13  1.2149E-11 -5.4662E-14  9.2672E-13  1.5536E-11  7.1129E-10
  6.0552E-15 -5.4662E-14  6.4614E-13 -5.7011E-13 -6.7957E-14 -2.5515E-12
  2.2204E-14  9.2672E-13 -5.7011E-13  6.3283E-13  1.2498E-12  5.8025E-11
  2.7732E-13  1.5536E-11 -6.7957E-14  1.2498E-12  2.0878E-11  9.6156E-10
  2.0009E-11  7.1129E-10 -2.5515E-12  5.8025E-11  9.6156E-10  4.4887E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
   15.894897   35.005978    0.840063    0.151634   -0.532619  2455805.956666
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:          143.54893 +/-     5.013
Argument of Peri:      283.30644 +/-     4.973
Long of Asc Node:      320.45209 +/-     0.011
Inclination:            16.35857 +/-     0.001
Eccentricity:         0.12180278 +/-    0.0057
Semi-Major Axis:     47.75799010 +/-    0.0641
Time of Perihelion: 2407731.5149 +/-    1676.0
Perihelion:          41.94093437 +/-    0.2790
Aphelion:            53.57504584 +/-    0.2826
Period (y)              330.0481 +/-      0.66
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           41.99132836 +/-    0.0098
Ecliptic Y           28.38254705 +/-    0.0068
Ecliptic Z           14.27215764 +/-    0.0034
Ecliptic XDOT        -0.00117255 +/-    0.0000
Ecliptic YDOT         0.00190366 +/-    0.0000
Ecliptic ZDOT         0.00021173 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   52.65486794 +/-    0.0087
Geocenter to KBO     52.11200968 +/-    0.0124
# Hcoef:  7.65

The following table shows the complete astrometric record for 12UT177. 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 (12UT177) followed by the observatory code and reference code for the source of the astrometry.

2011 09  01.45590  01 47 02.631  +28 04 56.20  24.7r 12UT177   568  C~1CL9      
2011 09  05.43843  01 46 52.207  +28 05 08.10  24.3r 12UT177   568  C~1CL9      
2012 08  21.51640  01 51 04.362  +28 27 07.25        12UT177   568  C~1CL9      
2012 08  23.50753  01 51 00.750  +28 27 25.71  24.6r 12UT177   568  C~1CL9      
2012 08  24.47464  01 50 58.877  +28 27 34.02  24.6r 12UT177   568  C~1CL9      
2012 08  28.45033  01 50 50.575  +28 28 02.90  25.3r 12UT177   568  C~1CL9      
2012 08  28.48894  01 50 50.478  +28 28 03.11  24.9r 12UT177   568  C~1CL9      
2012 08  28.53271  01 50 50.375  +28 28 03.52  25.0r 12UT177   568  C~1CL9      
2012 09  13.38246  01 50 07.142  +28 28 38.13  24.7r 12UT177   568  C~1CL9      
2012 09  14.46875  01 50 03.634  +28 28 35.75  24.9r 12UT177   568  C~1CL9      
2012 10  19.43725  01 47 47.364  +28 22 10.53        12UT177   568  C~1CL9      
2012 10  20.42535  01 47 43.156  +28 21 52.01  24.6r 12UT177   568  C~1CL9      
2012 10  21.40942  01 47 38.924  +28 21 33.01  24.7r 12UT177   568  C~1CL9      
2012 10  21.44796  01 47 38.788  +28 21 32.16  24.4r 12UT177   568  C~1CL9      
2012 10  21.48638  01 47 38.613  +28 21 31.52  25.0r 12UT177   568  C~1CL9      
2012 10  21.50363  01 47 38.537  +28 21 31.04  25.0r 12UT177   568  C~1CL9      
2012 10  21.50789  01 47 38.509  +28 21 30.95        12UT177   568  C~1CL9      
2012 11  16.31888  01 45 52.479  +28 11 27.21        12UT177   568  C~1CL9      
2013 01  14.25068  01 43 54.907  +27 47 06.27  24.6r 12UT177   568  C~1CL9      
2013 01  14.29036  01 43 54.907  +27 47 05.44  24.6r 12UT177   568  C~1CL9      
2013 02  16.24351  01 44 47.569  +27 41 23.88        12UT177   568  C~1CL9      

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    -0.08       0.00     0.08
  2   0.0109   -123.79     0.07      62.02     0.04
  3   0.9721   3459.41     0.18      71.98    -0.13
  4   0.9776   3421.66     0.18     106.42    -0.13
  5   0.9802   3401.63    -0.03     123.10     0.02
  6   0.9911   3310.00     0.01     189.65    -0.12
  7   0.9912   3308.88    -0.12     190.30    -0.12
  8   0.9913   3307.77    -0.10     191.18     0.01
  9   1.0347   2788.96    -0.05     430.20     0.00
 10   1.0377   2745.00    -0.12     444.80     0.01
 11   1.1334    930.82    -0.04     743.61    -0.13
 12   1.1361    872.36     0.15     746.83     0.02
 13   1.1388    813.43    -0.22     749.72     0.19
 14   1.1389    811.45     0.13     749.59    -0.05
 15   1.1390    809.07     0.08     749.85     0.09
 16   1.1391    807.96     0.01     749.77    -0.03
 17   1.1391    807.58    -0.11     749.82     0.01
 18   1.2098   -717.10     0.15     706.91     0.04
 19   1.3711  -2707.42     0.03     -66.91     0.07
 20   1.3712  -2707.74    -0.11     -67.68    -0.00
 21   1.4614  -2187.23    -0.00    -646.20     0.14

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.

12UT177    quality flag:2

Type:       SCATEXTD      2:1E  SCATEXTD

axisobj        47.858    48.109    47.725
ecceobj         0.120     0.140     0.108
incobj         16.355    16.356    16.354
qmin           40.947    34.501    41.347
qmax           54.574    61.983    53.836
amean          47.564    47.796    47.433
amin           47.159    47.247    47.027
amax           48.060    48.491    47.878
emean           0.116     0.206     0.111
emin            0.098     0.110     0.097
emax            0.136     0.279     0.125
imean          17.793    15.431    17.765
imin           17.387    12.359    17.431
imax           18.183    18.126    18.032
excite_mean     0.327     0.341     0.325
fracstop        1.000     1.000     1.000
cjmean          3.009     3.003     3.010

libcent 0      -180.0     175.7    -180.0
libamp  0      -180.0     138.9    -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       178.6     249.5     188.6
kozaiamp        180.0      74.9     180.0