Orbit Fit and Astrometric record for 12UG177

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: 12UG177   
# Created Thu Dec 14 02:37:51 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:   4.20y
# First observation: 2011/11/24
#  Last observation: 2016/02/04
Preliminary a, adot, b, bdot, g, gdot:
   0.000349   0.040440  -0.000088  -0.009395   0.033788   0.000000
# Chi-squared of fit:    10.98 DOF:   34 RMS:  0.13
# Min/Max residuals:    -0.32    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.933775E-05  4.131380E-02 -4.769563E-06 -9.696543E-03  3.369203E-02 -1.275776E-03
# Covariance matrix:
  3.4731E-13 -4.0639E-13 -5.5210E-14  9.7081E-14 -1.1309E-13 -1.9631E-12
 -4.0639E-13  8.0074E-13  1.2767E-13 -2.4104E-13  4.1165E-14  4.5576E-12
 -5.5210E-14  1.2767E-13  1.6479E-13 -1.0727E-13 -5.2881E-16  7.9833E-13
  9.7081E-14 -2.4104E-13 -1.0727E-13  1.4403E-13  1.5367E-14 -1.5292E-12
 -1.1309E-13  4.1165E-14 -5.2881E-16  1.5367E-14  1.9116E-13 -3.4537E-14
 -1.9631E-12  4.5576E-12  7.9833E-13 -1.5292E-12 -3.4537E-14  2.8523E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   17.841819   29.722828   -0.521207    0.256028   -0.795378  2455889.855906
# Heliocentric elements and errors
Epoch:              2455880.5000  =  2011/11/15
Mean Anomaly:          357.78875 +/-     0.024
Argument of Peri:      130.32111 +/-     0.039
Long of Asc Node:      261.93315 +/-     0.001
Inclination:            21.85621 +/-     0.000
Eccentricity:         0.23073952 +/-    0.0001
Semi-Major Axis:     39.61436313 +/-    0.0035
Time of Perihelion: 2456439.8888 +/-       6.0
Perihelion:          30.47376416 +/-    0.0036
Aphelion:            48.75496210 +/-    0.0049
Period (y)              249.3373 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.00637068 +/-    0.0003
Ecliptic Y           14.87663144 +/-    0.0002
Ecliptic Z            9.09369230 +/-    0.0001
Ecliptic XDOT        -0.00154448 +/-    0.0000
Ecliptic YDOT         0.00299121 +/-    0.0000
Ecliptic ZDOT        -0.00078174 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   30.48488113 +/-    0.0003
Geocenter to KBO     29.68061317 +/-    0.0004
# Hcoef:  9.67

The following table shows the complete astrometric record for 12UG177. 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 (12UG177) followed by the observatory code and reference code for the source of the astrometry.

2011 11  24.35514  01 22 30.054  +27 57 33.00  24.3r 12UG177   568  C~1C6T      
2011 11  26.43627  01 22 20.414  +27 55 40.01  24.4r 12UG177   568  C~1C6T      
2011 11  29.32442  01 22 07.817  +27 53 03.54  24.2r 12UG177   568  C~1C6T      
2011 12  01.34208  01 21 59.528  +27 51 14.45  24.5r 12UG177   568  C~1C6T      
2012 08  18.50472  01 42 20.034  +29 01 30.28  24.3r 12UG177   568  C~1C6T      
2012 08  18.54379  01 42 19.929  +29 01 31.04  24.1r 12UG177   568  C~1C6T      
2012 08  23.59545  01 42 07.121  +29 02 41.30  24.4r 12UG177   568  C~1C6T      
2012 09  12.40265  01 40 48.780  +29 03 29.98  24.4r 12UG177   568  C~1C6T      
2012 09  14.43873  01 40 38.479  +29 03 13.96  24.6r 12UG177   568  C~1C6T      
2012 10  19.50141  01 37 00.926  +28 48 53.54  24.7r 12UG177   568  C~1C6T      
2012 10  20.36936  01 36 55.104  +28 48 19.71  24.4r 12UG177   568  C~1C6T      
2012 10  20.40829  01 36 54.843  +28 48 18.12  24.4r 12UG177   568  C~1C6T      
2012 10  20.44675  01 36 54.572  +28 48 16.52  24.2r 12UG177   568  C~1C6T      
2012 10  21.45652  01 36 47.785  +28 47 36.41  24.4r 12UG177   568  C~1C6T      
2012 11  14.36744  01 34 15.083  +28 29 02.68  24.7r 12UG177   568  C~1C6T      
2013 01  14.26447  01 31 45.383  +27 40 15.97  24.5r 12UG177   568  C~1C6T      
2013 02  04.22689  01 32 50.144  +27 31 22.10        12UG177   568  C~1C6T      
2013 02  17.22194  01 33 59.206  +27 29 04.39  24.7r 12UG177   568  C~1C6T      
2016 02  04.10106  02 04 34.33   +28 21 21.5   23.9R 12UG177   G37  C~1lwU      
2016 02  04.19214  02 04 34.65   +28 21 18.8         12UG177   G37  C~1lwU      

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     0.01       0.00     0.05
  2   0.0057   -161.77    -0.09     -54.01    -0.03
  3   0.0136   -376.68     0.07    -132.59     0.02
  4   0.0191   -520.56     0.07    -189.88     0.11
  5   0.7342  16020.32    -0.02   -2280.81    -0.06
  6   0.7343  16019.29    -0.15   -2279.60     0.12
  7   0.7481  15886.07    -0.02   -2154.14     0.15
  8   0.8023  14937.29     0.10   -1743.01     0.17
  9   0.8079  14804.67     0.23   -1709.79     0.04
 10   0.9039  11817.78    -0.18   -1484.34    -0.06
 11   0.9063  11733.93    -0.04   -1488.05    -0.02
 12   0.9064  11730.14     0.01   -1488.28    -0.11
 13   0.9065  11726.23    -0.10   -1488.48    -0.16
 14   0.9092  11628.22     0.07   -1493.40    -0.18
 15   0.9747   9343.81     0.07   -1793.66     0.08
 16   1.1414   6413.71     0.07   -3776.99     0.14
 17   1.1988   7014.65     0.01   -4594.21    -0.14
 18   1.2344   7818.49    -0.14   -5063.54    -0.18
 19   4.1964  32032.06    -0.06  -10464.67     0.40
 20   4.1967  32035.34     0.08  -10468.61    -0.32

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.

12UG177    quality flag:3

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

axisobj        39.684    39.697    39.672
ecceobj         0.232     0.232     0.232
incobj         21.863    21.864    21.863
qmin           27.336    27.221    27.448
qmax           52.252    52.305    52.161
amean          39.454    39.454    39.454
amin           38.990    39.028    38.993
amax           40.040    40.001    40.011
emean           0.249     0.251     0.248
emin            0.186     0.183     0.188
emax            0.308     0.309     0.305
imean          22.419    22.358    22.470
imin           20.407    20.343    20.443
imax           24.329    24.330    24.321
excite_mean     0.457     0.457     0.457
fracstop        1.000     1.000     1.000
cjmean          2.810     2.810     2.811

libcent 0       179.9     179.8     180.8
libamp  0        91.5      86.6      94.7
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        86.3      85.7      87.1
kozaiamp         45.3      43.2      48.3