Orbit Fit and Astrometric record for 12UH177

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: 12UH177   
# Created Wed Oct 18 01:38:12 2017
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   27
# Arc:   1.46y
# First observation: 2011/09/01
#  Last observation: 2013/02/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.000165   0.018131  -0.000032  -0.005768   0.022177   0.000000
# Chi-squared of fit:     7.00 DOF:   48 RMS:  0.09
# Min/Max residuals:    -0.18    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.328756E-05  1.800421E-02 -3.906439E-06 -5.840463E-03  2.225997E-02  2.473594E-03
# Covariance matrix:
  4.6615E-13 -8.2848E-14  1.5758E-14 -1.5309E-13  4.0963E-13  1.9766E-11
 -8.2848E-14  3.4882E-13  1.0315E-14 -1.0061E-13  2.6990E-13  1.2994E-11
  1.5758E-14  1.0315E-14  2.5428E-13 -2.4184E-13  2.7048E-14  2.1457E-12
 -1.5309E-13 -1.0061E-13 -2.4184E-13  3.8612E-13 -2.8163E-13 -1.6465E-11
  4.0963E-13  2.6990E-13  2.7048E-14 -2.8163E-13  7.8592E-13  3.6546E-11
  1.9766E-11  1.2994E-11  2.1457E-12 -1.6465E-11  3.6546E-11  2.0831E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   16.405020   34.912108    0.838778    0.156916   -0.533089  2455805.995036
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:          136.63317 +/-     0.549
Argument of Peri:      347.00005 +/-     0.532
Long of Asc Node:      255.22394 +/-     0.003
Inclination:            23.71509 +/-     0.001
Eccentricity:         0.18606065 +/-    0.0010
Semi-Major Axis:     39.58173068 +/-    0.0149
Time of Perihelion: 2421278.6363 +/-     137.3
Perihelion:          32.21712818 +/-    0.0424
Aphelion:            46.94633317 +/-    0.0443
Period (y)              249.0293 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.27821967 +/-    0.0014
Ecliptic Y           24.29544336 +/-    0.0010
Ecliptic Z           12.68745181 +/-    0.0005
Ecliptic XDOT        -0.00086483 +/-    0.0000
Ecliptic YDOT         0.00210442 +/-    0.0000
Ecliptic ZDOT        -0.00060311 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.46811217 +/-    0.0013
Geocenter to KBO     44.92369651 +/-    0.0018
# Hcoef:  7.94

The following table shows the complete astrometric record for 12UH177. 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 (12UH177) followed by the observatory code and reference code for the source of the astrometry.

2011 09  01.49427  01 45 48.313  +28 31 21.93  24.4r 12UH177   568  C~1C6T      
2011 09  01.54049  01 45 48.191  +28 31 22.10  24.3r 12UH177   568  C~1C6T      
2011 09  05.47683  01 45 36.511  +28 31 21.99  24.5r 12UH177   568  C~1C6T      
2011 11  24.40638  01 39 48.804  +28 01 43.70  24.1r 12UH177   568  C~1C6T      
2011 11  24.41064  01 39 48.795  +28 01 43.62  24.4r 12UH177   568  C~1C6T      
2011 12  01.44101  01 39 23.507  +27 57 30.62  24.4r 12UH177   568  C~1C6T      
2011 12  01.46247  01 39 23.443  +27 57 30.09  24.0r 12UH177   568  C~1C6T      
2012 08  18.56096  01 51 13.190  +28 34 12.95  24.9r 12UH177   568  C~1C6U      
2012 08  21.51640  01 51 07.892  +28 34 38.24  24.1r 12UH177   568  C~1C6U      
2012 08  23.50753  01 51 03.930  +28 34 52.34  24.5r 12UH177   568  C~1C6U      
2012 08  24.47464  01 51 01.886  +28 34 58.42  24.9r 12UH177   568  C~1C6U      
2012 08  28.45033  01 50 52.679  +28 35 17.60  24.6r 12UH177   568  C~1C6U      
2012 09  13.38246  01 50 04.023  +28 34 59.39  24.3r 12UH177   568  C~1C6U      
2012 09  14.46875  01 50 00.068  +28 34 52.56  24.5r 12UH177   568  C~1C6U      
2012 10  19.43725  01 47 25.667  +28 25 13.04  23.9r 12UH177   568  C~1C6U      
2012 10  19.51434  01 47 25.293  +28 25 11.03  24.5r 12UH177   568  C~1C6U      
2012 10  20.42535  01 47 20.895  +28 24 47.74  24.5r 12UH177   568  C~1C6U      
2012 10  21.40942  01 47 16.119  +28 24 21.74  24.4r 12UH177   568  C~1C6U      
2012 10  21.44796  01 47 15.928  +28 24 20.76  24.3r 12UH177   568  C~1C6U      
2012 10  21.50363  01 47 15.669  +28 24 19.20        12UH177   568  C~1C6U      
2012 10  21.50789  01 47 15.650  +28 24 19.16        12UH177   568  C~1C6U      
2012 10  23.38023  01 47 06.575  +28 23 28.69  24.3r 12UH177   568  C~1C6U      
2012 11  14.39750  01 45 23.861  +28 12 04.11  24.8r 12UH177   568  C~1C6U      
2012 11  16.31888  01 45 15.577  +28 10 58.43  24.4r 12UH177   568  C~1C6U      
2013 02  06.24489  01 43 41.763  +27 32 04.99  24.3r 12UH177   568  C~1C6U      
2013 02  14.24187  01 44 05.165  +27 30 48.22  24.4r 12UH177   568  C~1C6U      
2013 02  14.27613  01 44 05.274  +27 30 47.93  24.4r 12UH177   568  C~1C6U      

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    -0.10       0.00    -0.05
  2   0.0001     -1.43     0.09       0.75    -0.01
  3   0.0109   -144.39     0.09      57.83    -0.03
  4   0.2297  -5070.11    -0.07     143.50    -0.00
  5   0.2298  -5070.25     0.06     143.47     0.03
  6   0.2490  -5476.82    -0.12      38.07    -0.09
  7   0.2491  -5477.81     0.09      37.90     0.10
  8   0.9639   4046.85    -0.04   -1407.80    -0.11
  9   0.9720   3990.86    -0.18   -1359.02     0.07
 10   0.9774   3947.26    -0.04   -1327.02    -0.02
 11   0.9801   3924.34    -0.00   -1311.62     0.02
 12   0.9910   3818.15     0.06   -1249.91     0.13
 13   1.0346   3214.00     0.18   -1034.69    -0.07
 14   1.0376   3162.96     0.08   -1022.14    -0.08
 15   1.1333   1056.40    -0.18    -817.32     0.00
 16   1.1335   1051.07    -0.11    -817.38    -0.04
 17   1.1360    988.55     0.07    -817.67     0.17
 18   1.1387    920.39    -0.09    -818.63     0.09
 19   1.1388    917.68    -0.08    -818.61     0.13
 20   1.1390    913.93     0.08    -818.80    -0.01
 21   1.1390    913.68     0.13    -818.75     0.05
 22   1.1441    783.76    -0.07    -821.53     0.07
 23   1.2044   -729.94     0.14    -954.95    -0.13
 24   1.2096   -856.04    -0.03    -975.16     0.02
 25   1.4340  -2882.52     0.10   -2674.73    -0.16
 26   1.4558  -2622.65     0.01   -2862.64    -0.03
 27   1.4559  -2621.41    -0.02   -2863.45    -0.05

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.

12UH177    quality flag:3

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

axisobj        39.647    39.692    39.606
ecceobj         0.185     0.188     0.182
incobj         23.707    23.706    23.708
qmin           30.926    30.908    30.925
qmax           48.468    48.421    48.479
amean          39.454    39.455    39.455
amin           39.062    39.069    39.061
amax           39.885    39.880    39.912
emean           0.177     0.178     0.180
emin            0.134     0.132     0.136
emax            0.215     0.216     0.216
imean          25.588    25.633    25.486
imin           24.793    24.837    24.700
imax           26.428    26.471    26.334
excite_mean     0.467     0.468     0.467
fracstop        1.000     1.000     1.000
cjmean          2.794     2.794     2.795

libcent 0       180.1     180.5     178.5
libamp  0        75.6      75.7      85.5
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       187.0     187.1     177.4
kozaiamp        180.0     180.0     180.0