Orbit Fit and Astrometric record for 12UJ177

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: 12UJ177   
# Created Mon Oct 23 01:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   25
# Arc:   1.46y
# First observation: 2011/08/31
#  Last observation: 2013/02/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.000138   0.035886  -0.000022  -0.000680   0.029432   0.000000
# Chi-squared of fit:     6.76 DOF:   44 RMS:  0.09
# Min/Max residuals:    -0.27    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.936197E-05  3.587338E-02  9.107332E-07 -7.680988E-04  2.952292E-02  9.484935E-03
# Covariance matrix:
  3.6175E-13  1.8038E-13 -1.1966E-15 -2.0865E-14  3.7033E-13  1.4253E-11
  1.8038E-13  1.1365E-12  1.3895E-15 -6.0244E-14  9.1563E-13  3.7888E-11
 -1.1966E-15  1.3895E-15  2.1605E-13 -1.8340E-13 -3.2112E-15  3.1850E-13
 -2.0865E-14 -6.0244E-14 -1.8340E-13  2.1884E-13 -5.2399E-14 -2.8897E-12
  3.7033E-13  9.1563E-13 -3.2112E-15 -5.2399E-14  9.3654E-13  3.5934E-11
  1.4253E-11  3.7888E-11  3.1850E-13 -2.8897E-12  3.5934E-11  1.6476E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   15.876865   33.141908    0.831083    0.155255   -0.545976  2455805.002856
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:           16.91181 +/-     0.044
Argument of Peri:       47.44338 +/-     0.133
Long of Asc Node:      298.87467 +/-     0.003
Inclination:            15.63035 +/-     0.000
Eccentricity:         0.43906342 +/-    0.0011
Semi-Major Axis:     55.83189855 +/-    0.0632
Time of Perihelion: 2448642.2039 +/-      13.8
Perihelion:          31.31815423 +/-    0.0685
Aphelion:            80.34564287 +/-    0.1083
Period (y)              417.1880 +/-      0.71
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.21268816 +/-    0.0009
Ecliptic Y           17.42756999 +/-    0.0006
Ecliptic Z            9.26644041 +/-    0.0003
Ecliptic XDOT        -0.00109724 +/-    0.0000
Ecliptic YDOT         0.00326416 +/-    0.0000
Ecliptic ZDOT         0.00017218 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.43171338 +/-    0.0008
Geocenter to KBO     33.87198384 +/-    0.0011
# Hcoef:  9.13

The following table shows the complete astrometric record for 12UJ177. 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 (12UJ177) followed by the observatory code and reference code for the source of the astrometry.

2011 08  31.50209  01 39 33.217  +27 23 53.27  24.4r 12UJ177   568  C~1C6U      
2011 08  31.54505  01 39 33.058  +27 23 53.79  24.9r 12UJ177   568  C~1C6U      
2011 08  31.60929  01 39 32.834  +27 23 54.08  24.9r 12UJ177   568  C~1C6U      
2011 09  05.51527  01 39 14.996  +27 24 14.77  24.5r 12UJ177   568  C~1C6U      
2011 11  24.38502  01 32 07.614  +26 51 14.06  24.3r 12UJ177   568  C~1C6U      
2011 11  30.46714  01 31 41.957  +26 47 03.14  24.3r 12UJ177   568  C~1C6U      
2011 12  01.38483  01 31 38.391  +26 46 25.22  24.5r 12UJ177   568  C~1C6U      
2011 12  01.40191  01 31 38.321  +26 46 24.49  24.2r 12UJ177   568  C~1C6U      
2012 08  21.50331  01 48 37.250  +28 04 38.47  23.9r 12UJ177   568  C~1C6U      
2012 08  28.47612  01 48 19.196  +28 06 04.64  24.4r 12UJ177   568  C~1C6U      
2012 09  12.48289  01 47 24.121  +28 07 01.62  24.5r 12UJ177   568  C~1C6U      
2012 09  14.45580  01 47 15.409  +28 06 55.85        12UJ177   568  C~1C6U      
2012 10  19.39438  01 44 04.558  +27 57 11.84        12UJ177   568  C~1C6U      
2012 10  20.38644  01 43 58.607  +27 56 43.41  24.9r 12UJ177   568  C~1C6U      
2012 10  21.39663  01 43 52.543  +27 56 13.60  24.1r 12UJ177   568  C~1C6U      
2012 10  21.43518  01 43 52.311  +27 56 12.49  24.2r 12UJ177   568  C~1C6U      
2012 10  21.47359  01 43 52.070  +27 56 11.46  24.2r 12UJ177   568  C~1C6U      
2012 11  14.38458  01 41 34.617  +27 42 12.81  24.0r 12UJ177   568  C~1C6U      
2012 11  16.30609  01 41 24.594  +27 40 57.29  24.5r 12UJ177   568  C~1C6U      
2013 01  14.25495  01 39 03.786  +27 05 18.88  24.5r 12UJ177   568  C~1C6U      
2013 01  14.26012  01 39 03.794  +27 05 18.70  24.8r 12UJ177   568  C~1C6U      
2013 01  14.29892  01 39 03.840  +27 05 17.69        12UJ177   568  C~1C6U      
2013 02  03.31560  01 39 49.314  +26 59 19.95  25.0r 12UJ177   568  C~1C6U      
2013 02  09.29360  01 40 12.107  +26 58 29.42  24.3r 12UJ177   568  C~1C6U      
2013 02  14.22894  01 40 33.926  +26 58 08.45  24.2r 12UJ177   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    -0.03       0.00    -0.27
  2   0.0001     -1.77    -0.04       1.28    -0.00
  3   0.0003     -4.42    -0.05       2.66    -0.11
  4   0.0137   -216.83     0.10     111.03     0.04
  5   0.2324  -6247.94    -0.01     462.03     0.09
  6   0.2490  -6662.38    -0.02     364.53     0.26
  7   0.2516  -6721.19     0.03     348.20     0.03
  8   0.2516  -6722.34    -0.01     347.89     0.02
  9   0.9747   7619.59    -0.06    -373.34     0.02
 10   0.9938   7427.15     0.04    -207.17     0.06
 11   1.0349   6766.87    -0.09     108.11    -0.01
 12   1.0403   6657.16    -0.07     144.29    -0.05
 13   1.1359   4089.15     0.09     519.15    -0.05
 14   1.1386   4005.33     0.09     521.62     0.09
 15   1.1414   3919.61    -0.03     523.37    -0.03
 16   1.1415   3916.34     0.03     523.47    -0.01
 17   1.1416   3912.99    -0.01     523.68     0.12
 18   1.2071   1908.28     0.02     417.46    -0.16
 19   1.2123   1756.62     0.20     396.80    -0.07
 20   1.3737   -782.33    -0.02    -885.38     0.13
 21   1.3737   -782.30     0.01    -885.59     0.06
 22   1.3738   -782.11     0.11    -886.76    -0.02
 23   1.4286   -353.25     0.01   -1446.41     0.02
 24   1.4450    -89.62    -0.15   -1607.31    -0.05
 25   1.4585    173.11    -0.15   -1735.75    -0.12

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.

12UJ177    quality flag:2

Type:         5:2EEE    5:2EEE  CENTAURS

axisobj        56.004    56.198    55.814
ecceobj         0.441     0.444     0.438
incobj         15.631    15.631    15.631
qmin           30.534    30.730    30.031
qmax           81.875    81.486    82.600
amean          55.462    55.461    55.466
amin           54.625    54.740    54.412
amax           56.519    56.392    56.704
emean           0.434     0.434     0.434
emin            0.419     0.424     0.416
emax            0.451     0.446     0.460
imean          17.334    17.335    17.140
imin           16.596    17.037    14.733
imax           17.820    17.561    18.045
excite_mean     0.526     0.527     0.524
fracstop        1.000     1.000     1.000
cjmean          2.877     2.876     2.879

libcent 0       179.7     180.5    -180.0
libamp  0       112.6      75.4    -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       168.5     115.2     175.4
kozaiamp        123.5      69.3     180.0