Orbit Fit and Astrometric record for 12UQ177

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: 12UQ177   
# Created Thu Oct 19 01:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting   28 observations of   28
# Arc:   4.19y
# First observation: 2011/09/01
#  Last observation: 2015/11/08
Preliminary a, adot, b, bdot, g, gdot:
  -0.000422   0.027513  -0.000096   0.004494   0.025347   0.000000
# Chi-squared of fit:    10.34 DOF:   50 RMS:  0.11
# Min/Max residuals:    -0.30    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.764359E-05  2.672976E-02  3.110647E-06  4.311470E-03  2.520294E-02 -5.578102E-03
# Covariance matrix:
  2.0714E-13 -1.7430E-13  1.8339E-14 -2.9915E-14  2.0714E-14 -1.3964E-12
 -1.7430E-13  3.3391E-13 -3.7389E-14  6.2395E-14  1.1335E-13  3.0409E-12
  1.8339E-14 -3.7389E-14  1.1821E-13 -6.4616E-14 -1.0874E-14 -4.0994E-13
 -2.9915E-14  6.2395E-14 -6.4616E-14  6.5464E-14  1.9198E-14  6.8218E-13
  2.0714E-14  1.1335E-13 -1.0874E-14  1.9198E-14  1.4943E-13  1.0296E-12
 -1.3964E-12  3.0409E-12 -4.0994E-13  6.8218E-13  1.0296E-12  3.3075E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   17.481775   31.868906    0.808842    0.179748   -0.570846  2455805.923946
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:          329.43904 +/-     0.012
Argument of Peri:      119.18543 +/-     0.030
Long of Asc Node:      330.10811 +/-     0.001
Inclination:            19.59220 +/-     0.000
Eccentricity:         0.31649005 +/-    0.0002
Semi-Major Axis:     52.41506392 +/-    0.0072
Time of Perihelion: 2467566.9945 +/-       3.8
Perihelion:          35.82621754 +/-    0.0113
Aphelion:            69.00391030 +/-    0.0139
Period (y)              379.4830 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.07903030 +/-    0.0005
Ecliptic Y           19.61182138 +/-    0.0003
Ecliptic Z           11.91948749 +/-    0.0002
Ecliptic XDOT        -0.00214661 +/-    0.0000
Ecliptic YDOT         0.00209195 +/-    0.0000
Ecliptic ZDOT         0.00026476 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.26065034 +/-    0.0004
Geocenter to KBO     39.67790969 +/-    0.0006
# Hcoef:  8.08

The following table shows the complete astrometric record for 12UQ177. 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 (12UQ177) followed by the observatory code and reference code for the source of the astrometry.

2011 09  01.42318  01 31 41.352  +28 25 11.96  23.9r 12UQ177   568  C~1CL8      
2011 09  01.46869  01 31 41.213  +28 25 12.28  24.3r 12UQ177   568  C~1CL8      
2011 09  01.51133  01 31 41.062  +28 25 12.57  23.8r 12UQ177   568  C~1CL8      
2011 09  05.45125  01 31 27.050  +28 25 33.94  24.0r 12UQ177   568  C~1CL8      
2011 11  24.35514  01 24 58.798  +27 58 36.07  23.9r 12UQ177   568  C~1CL9      
2011 11  30.31101  01 24 36.417  +27 55 05.35  23.9r 12UQ177   568  C~1CL9      
2011 12  01.35919  01 24 32.763  +27 54 28.23  24.0r 12UQ177   568  C~1CL9      
2012 01  28.29635  01 23 59.935  +27 28 49.78  24.2r 12UQ177   568  C~1CL9      
2012 08  18.49191  01 38 23.045  +29 11 09.04  24.1r 12UQ177   568  C~1CL9      
2012 08  18.53098  01 38 22.959  +29 11 09.84  24.4r 12UQ177   568  C~1CL9      
2012 08  21.52493  01 38 16.162  +29 11 59.81  24.0r 12UQ177   568  C~1CL9      
2012 08  23.57612  01 38 10.987  +29 12 30.57  23.9r 12UQ177   568  C~1CL9      
2012 08  28.45900  01 37 57.243  +29 13 31.75  23.9r 12UQ177   568  C~1CL9      
2012 09  12.38956  01 37 02.984  +29 14 53.32  24.1r 12UQ177   568  C~1CL9      
2012 09  14.42586  01 36 54.319  +29 14 52.00  24.0r 12UQ177   568  C~1CL9      
2012 10  19.36449  01 33 56.605  +29 07 05.65  23.8r 12UQ177   568  C~1CL9      
2012 10  19.40727  01 33 56.375  +29 07 04.50  23.8r 12UQ177   568  C~1CL9      
2012 10  20.35652  01 33 51.186  +29 06 41.29  23.8r 12UQ177   568  C~1CL9      
2012 10  20.39499  01 33 50.980  +29 06 40.38  23.9r 12UQ177   568  C~1CL9      
2012 10  20.43389  01 33 50.758  +29 06 39.40  23.9r 12UQ177   568  C~1CL9      
2012 10  21.41799  01 33 45.392  +29 06 14.86        12UQ177   568  C~1CL9      
2012 11  14.35465  01 31 41.227  +28 54 10.74  23.9r 12UQ177   568  C~1CL9      
2013 01  14.27738  01 29 28.423  +28 21 47.39  24.2r 12UQ177   568  C~1CL9      
2013 02  04.22689  01 30 12.101  +28 16 31.70  23.9r 12UQ177   568  C~1CL9      
2013 02  06.24045  01 30 18.718  +28 16 16.46  24.4r 12UQ177   568  C~1CL9      
2013 02  14.23752  01 30 48.886  +28 15 44.63  24.0r 12UQ177   568  C~1CL9      
2015 11  08.13277  01 51 28.53   +31 25 36.2   23.7R 12UQ177   G37  C~1ddR      
2015 11  08.20431  01 51 28.11   +31 25 34.4         12UQ177   G37  C~1ddR      

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    -0.18       0.00    -0.08
  2   0.0001     -1.57     0.05       1.00    -0.19
  3   0.0002     -3.30     0.02       2.03    -0.19
  4   0.0110   -165.73     0.02      92.80    -0.14
  5   0.2298  -5523.61    -0.00     609.09    -0.00
  6   0.2461  -5879.74     0.02     533.48     0.05
  7   0.2490  -5938.99     0.00     518.67    -0.01
  8   0.4076  -6952.44     0.16    -719.64     0.14
  9   0.9639   5931.70     0.01     559.22     0.00
 10   0.9640   5930.95     0.06     560.38     0.09
 11   0.9722   5866.80     0.20     639.85    -0.01
 12   0.9778   5815.28    -0.04     693.59     0.15
 13   0.9912   5670.87     0.19     817.31     0.02
 14   1.0321   5041.86    -0.16    1157.84     0.05
 15   1.0377   4936.12    -0.11    1199.01     0.05
 16   1.1333   2603.79    -0.07    1644.04     0.15
 17   1.1334   2600.56    -0.01    1644.12     0.00
 18   1.1360   2528.83    -0.08    1648.48     0.04
 19   1.1361   2525.99     0.03    1648.66     0.03
 20   1.1362   2522.92    -0.05    1648.86     0.04
 21   1.1389   2448.53     0.05    1652.88     0.06
 22   1.2045    666.38    -0.06    1606.06    -0.06
 23   1.3713  -1697.04    -0.09     488.80    -0.07
 24   1.4286  -1287.73    -0.13     -25.80     0.16
 25   1.4341  -1213.02    -0.07     -73.67     0.00
 26   1.4560   -857.68     0.23    -256.98    -0.13
 27   4.1854  18364.55     0.09    4466.58    -0.30
 28   4.1856  18358.83    -0.06    4466.73     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.

12UQ177    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        52.553    52.572    52.535
ecceobj         0.317     0.318     0.317
incobj         19.583    19.583    19.583
qmin           34.913    34.859    34.922
qmax           70.000    69.961    69.777
amean          52.053    52.056    51.996
amin           51.508    51.504    51.487
amax           52.717    52.755    52.647
emean           0.309     0.309     0.308
emin            0.291     0.291     0.290
emax            0.328     0.329     0.326
imean          20.881    20.887    20.884
imin           20.127    20.110    20.122
imax           21.567    21.532    21.535
excite_mean     0.472     0.472     0.471
fracstop        1.000     1.000     1.000
cjmean          2.915     2.915     2.915

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       183.2     184.5     185.7
kozaiamp        179.9     180.0     179.9