Orbit Fit and Astrometric record for 12UO177

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: 12UO177   
# Created Tue Dec 12 02:37:55 2017
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   25
# Arc:   1.46y
# First observation: 2011/09/01
#  Last observation: 2013/02/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.000094   0.022866  -0.000016  -0.001450   0.023823   0.000000
# Chi-squared of fit:     7.71 DOF:   44 RMS:  0.10
# Min/Max residuals:    -0.17    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.560342E-05  2.279033E-02 -1.177245E-06 -1.506990E-03  2.391312E-02  1.099470E-03
# Covariance matrix:
  7.0343E-13  8.5247E-15  2.2154E-14 -8.7345E-14  6.3383E-13  2.8938E-11
  8.5247E-15  4.7519E-13  1.4685E-14 -5.9818E-14  4.4928E-13  2.0080E-11
  2.2154E-14  1.4685E-14  3.1626E-13 -2.7493E-13  3.3536E-14  2.2222E-12
 -8.7345E-14 -5.9818E-14 -2.7493E-13  3.0543E-13 -1.3714E-13 -7.6100E-12
  6.3383E-13  4.4928E-13  3.3536E-14 -1.3714E-13  1.0341E-12  4.6107E-11
  2.8938E-11  2.0080E-11  2.2222E-12 -7.6100E-12  4.6107E-11  2.3639E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   16.312803   33.383738    0.824469    0.161965   -0.553554  2455805.915216
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:          113.52411 +/-     1.701
Argument of Peri:      344.90273 +/-     1.692
Long of Asc Node:      289.98632 +/-     0.005
Inclination:            16.44330 +/-     0.000
Eccentricity:         0.03196520 +/-    0.0019
Semi-Major Axis:     41.81416846 +/-    0.0043
Time of Perihelion: 2424656.8707 +/-     466.5
Perihelion:          40.47757019 +/-    0.0780
Aphelion:            43.15076672 +/-    0.0781
Period (y)              270.3917 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.45112269 +/-    0.0014
Ecliptic Y           21.71398645 +/-    0.0009
Ecliptic Z           11.74588516 +/-    0.0005
Ecliptic XDOT        -0.00129758 +/-    0.0000
Ecliptic YDOT         0.00227731 +/-    0.0000
Ecliptic ZDOT        -0.00013017 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.38328539 +/-    0.0013
Geocenter to KBO     41.81804574 +/-    0.0018
# Hcoef:  8.31

The following table shows the complete astrometric record for 12UO177. 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 (12UO177) followed by the observatory code and reference code for the source of the astrometry.

2011 09  01.41445  01 39 47.216  +27 53 21.89  24.5r 12UO177   568  C~1C6U      
2011 09  05.44269  01 39 34.270  +27 53 29.75  24.5r 12UO177   568  C~1C6U      
2011 11  24.38928  01 33 27.327  +27 24 37.10  24.6r 12UO177   568  C~1C6U      
2011 12  01.38909  01 33 01.658  +27 20 27.66  24.2r 12UO177   568  C~1C6U      
2011 12  01.42393  01 33 01.541  +27 20 26.49  24.5r 12UO177   568  C~1C6U      
2012 01  28.27120  01 32 18.456  +26 53 48.40  24.4r 12UO177   568  C~1C6U      
2012 08  21.50331  01 45 52.136  +28 16 22.48  24.1r 12UO177   568  C~1C6U      
2012 08  28.43740  01 45 35.449  +28 17 21.16        12UO177   568  C~1C6U      
2012 08  28.51992  01 45 35.235  +28 17 21.72        12UO177   568  C~1C6U      
2012 09  12.48289  01 44 46.150  +28 17 42.56  24.8r 12UO177   568  C~1C6U      
2012 09  14.45580  01 44 38.497  +28 17 34.23  24.6r 12UO177   568  C~1C6U      
2012 10  19.39438  01 41 53.845  +28 08 30.93  24.6r 12UO177   568  C~1C6U      
2012 10  19.40301  01 41 53.802  +28 08 30.66  24.4r 12UO177   568  C~1C6U      
2012 10  20.38644  01 41 48.762  +28 08 05.70        12UO177   568  C~1C6U      
2012 10  21.39663  01 41 43.583  +28 07 39.51  24.2r 12UO177   568  C~1C6U      
2012 10  21.43518  01 41 43.375  +28 07 38.52  24.3r 12UO177   568  C~1C6U      
2012 10  21.47359  01 41 43.178  +28 07 37.45        12UO177   568  C~1C6U      
2012 11  14.38458  01 39 45.608  +27 55 24.50        12UO177   568  C~1C6U      
2012 11  16.30609  01 39 37.014  +27 54 18.71  24.6r 12UO177   568  C~1C6U      
2013 01  14.26012  01 37 30.070  +27 23 01.83  24.5r 12UO177   568  C~1C6U      
2013 01  14.29462  01 37 30.108  +27 23 01.01  24.8r 12UO177   568  C~1C6U      
2013 02  09.28815  01 38 21.534  +27 16 31.39  24.5r 12UO177   568  C~1C6U      
2013 02  09.29360  01 38 21.541  +27 16 31.13  24.4r 12UO177   568  C~1C6U      
2013 02  10.23233  01 38 24.646  +27 16 24.60  24.5r 12UO177   568  C~1C6U      
2013 02  14.22894  01 38 38.644  +27 16 03.93        12UO177   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    -0.11       0.00     0.04
  2   0.0110   -156.08     0.04      71.82     0.04
  3   0.2299  -5324.88     0.01     332.79    -0.04
  4   0.2491  -5737.09    -0.06     235.55    -0.03
  5   0.2492  -5738.98     0.03     235.07     0.02
  6   0.4075  -6891.75     0.06   -1013.95    -0.02
  7   0.9722   4998.45     0.16    -504.44     0.01
  8   0.9912   4814.46    -0.12    -369.42    -0.06
  9   0.9914   4812.03     0.08    -367.86    -0.11
 10   1.0324   4215.90     0.05    -111.43     0.19
 11   1.0378   4118.76     0.03     -82.14     0.07
 12   1.1334   1895.15    -0.10     216.36    -0.03
 13   1.1334   1894.52    -0.09     216.32    -0.09
 14   1.1361   1823.35    -0.03     217.94     0.00
 15   1.1389   1750.01     0.00     219.11     0.01
 16   1.1390   1747.09    -0.07     219.22     0.06
 17   1.1391   1744.27    -0.05     219.20    -0.01
 18   1.2046     26.33     0.07     121.63    -0.04
 19   1.2098   -103.96     0.24     103.50    -0.11
 20   1.3712  -2375.30    -0.08    -996.32    -0.03
 21   1.3713  -2375.14     0.13    -997.27    -0.16
 22   1.4425  -1888.78     0.08   -1617.74     0.30
 23   1.4425  -1888.79    -0.13   -1618.01     0.15
 24   1.4451  -1852.94     0.02   -1639.72    -0.13
 25   1.4560  -1687.97    -0.17   -1729.44    -0.04

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.

12UO177    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.897    41.913    41.883
ecceobj         0.032     0.036     0.028
incobj         16.444    16.444    16.444
qmin           39.557    39.378    39.627
qmax           43.816    44.073    43.587
amean          41.616    41.618    41.596
amin           41.303    41.310    41.298
amax           41.935    41.942    41.894
emean           0.035     0.040     0.031
emin            0.023     0.029     0.019
emax            0.045     0.051     0.042
imean          18.087    18.070    18.091
imin           17.484    17.450    17.482
imax           18.590    18.591    18.598
excite_mean     0.312     0.313     0.312
fracstop        1.000     1.000     1.000
cjmean          2.956     2.956     2.956

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       178.3     172.9     181.0
kozaiamp        180.0     180.0     179.9