Orbit Fit and Astrometric record for 13UC18

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: 13UC18    
# Created Mon Dec 18 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   32 observations of   34
# Arc:   2.27y
# First observation: 2013/08/31
#  Last observation: 2015/12/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000078   0.022511  -0.000000  -0.000860   0.023557   0.000000
# Chi-squared of fit:    12.44 DOF:   58 RMS:  0.11
# Min/Max residuals:    -0.28    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.541040E-05  2.248083E-02 -4.430306E-07 -8.597031E-04  2.362148E-02  1.263149E-03
# Covariance matrix:
  2.4983E-13 -5.2747E-14  9.8124E-16 -2.2124E-15  1.7960E-13  1.1353E-12
 -5.2747E-14  3.2956E-13  4.5811E-15 -1.5845E-14  1.6213E-13  8.4408E-12
  9.8124E-16  4.5811E-15  1.1801E-13 -7.9024E-14  3.6687E-15  1.5966E-13
 -2.2124E-15 -1.5845E-14 -7.9024E-14  8.7037E-14 -1.1204E-14 -5.5009E-13
  1.7960E-13  1.6213E-13  3.6687E-15 -1.1204E-14  3.1192E-13  5.9143E-12
  1.1353E-12  8.4408E-12  1.5966E-13 -5.5009E-13  5.9143E-12  2.9296E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.964909   17.698761    0.646077   -0.026589   -0.776577  2456536.025878
# Heliocentric elements and errors
Epoch:              2456530.5000  =  2013/08/26
Mean Anomaly:           96.24974 +/-     0.265
Argument of Peri:      120.30394 +/-     0.254
Long of Asc Node:      155.87311 +/-     0.010
Inclination:             2.94093 +/-     0.001
Eccentricity:         0.03918289 +/-    0.0007
Semi-Major Axis:     42.86828523 +/-    0.0044
Time of Perihelion: 2429121.0929 +/-      75.4
Perihelion:          41.18858203 +/-    0.0318
Aphelion:            44.54798843 +/-    0.0319
Period (y)              280.6806 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           41.24310523 +/-    0.0010
Ecliptic Y           12.48643507 +/-    0.0003
Ecliptic Z           -1.45153132 +/-    0.0000
Ecliptic XDOT        -0.00066220 +/-    0.0000
Ecliptic YDOT         0.00252468 +/-    0.0000
Ecliptic ZDOT        -0.00010447 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.11625834 +/-    0.0009
Geocenter to KBO     42.33434916 +/-    0.0010
# Hcoef:  8.39

The following table shows the complete astrometric record for 13UC18. 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 (13UC18) followed by the observatory code and reference code for the source of the astrometry.

2013 08  31.52510  01 08 17.324  +05 07 44.73  25.7r 13UC18    568  C~2NKc      
2013 09  04.51419  01 08 04.274  +05 06 14.76  25.1r 13UC18    568  C~2NKc      
2013 10  06.42079  01 05 56.155  +04 52 17.13  24.7r 13UC18    568  C~2NKc      
2013 10  31.26225  01 04 08.803  +04 41 13.38  24.1r 13UC18    568  C~2NKc      
2013 10  31.30520  01 04 08.629  +04 41 12.19  24.5r 13UC18    568  C~2NKc      
2013 10  31.34794  01 04 08.443  +04 41 11.37  24.2r 13UC18    568  C~2NKc      
2013 11  01.28901  01 04 04.646  +04 40 48.22  24.2r 13UC18    568  C~2NKc      
2013 11  01.29758  01 04 04.624  +04 40 48.13  24.7r 13UC18    568  C~2NKc      
2013 11  01.41864  01 04 04.111  +04 40 45.23  24.6r 13UC18    568  C~2NKc      
2013 11  05.46665  01 03 48.031  +04 39 09.06  24.4r 13UC18    568  C~2NKc      
2013 11  07.44747  01 03 40.418  +04 38 23.65  24.9r 13UC18    568  C~2NKc      
2013 11  07.47861  01 03 40.288  +04 38 23.28  24.7r 13UC18    568  C~2NKc      
2013 12  04.27904  01 02 18.594  +04 30 39.17  23.1r 13UC18    568  C~2NKc      
2013 12  04.33121  01 02 18.474  +04 30 38.33  24.6r 13UC18    568  C~2NKc      
2013 12  05.26547  01 02 16.461  +04 30 28.45  24.9r 13UC18    568  C~2NKc      
2014 08  24.51225  01 13 29.485  +05 36 44.49  24.7r 13UC18    568  C~2NKc      
2014 08  28.49059  01 13 18.508  +05 35 26.74  24.7r 13UC18    568  C~2NKc      
2014 08  29.52684  01 13 15.470  +05 35 05.69  24.1r 13UC18    568  C~2NKc      
2014 08  29.61463  01 13 15.194  +05 35 03.79  24.5r 13UC18    568  C~2NKc      
2014 10  23.28255  01 09 35.863  +05 11 31.51  24.1r 13UC18    568  C~2NKc      
2014 10  23.33619  01 09 35.634  +05 11 29.93  24.4r 13UC18    568  C~2NKc      
2014 10  23.39470  01 09 35.395  +05 11 28.42  25.0r 13UC18    568  C~2NKc      
2014 10  25.25994  01 09 27.347  +05 10 39.71  24.5r 13UC18    568  C~2NKc      
2014 10  25.46195  01 09 26.471  +05 10 34.35  24.8r 13UC18    568  C~2NKc      
2014 10  27.24998  01 09 18.867  +05 09 48.18  24.3r 13UC18    568  C~2NKc      
2014 10  27.30820  01 09 18.595  +05 09 46.68  24.5r 13UC18    568  C~2NKc      
2014 11  25.24005  01 07 32.217  +04 59 25.47  23.9r 13UC18    568  C~2NKc      
2015 01  17.23854  01 06 49.982  +04 57 13.05  25.0r 13UC18    568  C~2NKc      
2015 08  20.51066  01 18 29.934  +06 04 13.84  25.0r 13UC18    568  C~2NKc      
2015 10  15.30155  01 15 04.233  +05 41 47.37  24.5r 13UC18    568  C~2NKc      
2015 10  15.30564  01 15 04.221  +05 41 47.31  24.4r 13UC18    568  C~2NKc      
2015 10  15.35250  01 15 03.999  +05 41 46.05  24.9r 13UC18    568  C~2NKc      
2015 10  15.35660  01 15 03.996  +05 41 45.95  24.8r 13UC18    568  C~2NKc      
2015 12  07.37779  01 11 51.508  +05 23 10.24  25.1w 13UC18    568  C~2NKc      

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    -0.07       0.00    -0.03
  2   0.0109   -214.54     0.01      -9.01    -0.28
  3   0.0983  -2303.87    -0.17     -54.20    -0.03
  4   0.1663  -4040.83    -0.04     -55.37     0.06
  5   0.1664  -4043.69    -0.03     -55.48    -0.09
  6   0.1665  -4046.57    -0.06     -55.18     0.17
  7   0.1691  -4107.90     0.18     -54.89    -0.08
  8   0.1691  -4108.24 (   0.41)    -54.85 (  -0.05)
  9   0.1695  -4116.44     0.23     -54.60     0.07
 10   0.1805  -4375.46    -0.07     -51.65     0.11
 11   0.1860  -4498.05    -0.09     -50.14    -0.06
 12   0.1860  -4499.98    -0.10     -49.73     0.30
 13   0.2594  -5806.95     0.14     -11.63     0.10
 14   0.2596  -5808.93    -0.00     -11.72    -0.11
 15   0.2621  -5840.55 (  -0.44)     -9.33 (   0.52)
 16   0.9801   4974.30     0.08    -159.62    -0.03
 17   0.9910   4793.09     0.08    -169.55    -0.03
 18   0.9938   4743.12     0.02    -171.86     0.13
 19   0.9941   4738.59    -0.14    -172.06     0.10
 20   1.1438   1171.42    -0.10    -236.39     0.10
 21   1.1439   1167.66    -0.06    -236.55    -0.10
 22   1.1441   1163.78     0.21    -236.59    -0.18
 23   1.1492   1034.06     0.02    -235.96     0.08
 24   1.1497   1019.92     0.06    -235.94    -0.05
 25   1.1546    897.30     0.19    -235.47    -0.09
 26   1.1548    892.97    -0.10    -235.31     0.02
 27   1.2340   -813.27    -0.03    -205.17    -0.19
 28   1.3791  -1447.30    -0.09     -87.23     0.02
 29   1.9685   9754.84     0.10    -324.93     0.02
 30   2.1212   6399.20    -0.11    -414.25    -0.03
 31   2.1212   6399.01    -0.00    -414.24    -0.02
 32   2.1214   6395.47    -0.15    -414.15     0.06
 33   2.1214   6395.39     0.07    -414.23    -0.02
 34   2.2665   3311.31     0.02    -359.01     0.08

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.

13UC18    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.102    43.116    43.087
ecceobj         0.041     0.043     0.040
incobj          2.934     2.934     2.934
qmin           40.433    40.376    40.459
qmax           45.484    45.518    45.428
amean          42.849    42.864    42.835
amin           42.518    42.537    42.508
amax           43.180    43.203    43.174
emean           0.035     0.036     0.033
emin            0.014     0.015     0.012
emax            0.053     0.054     0.052
imean           3.351     3.351     3.350
imin            2.193     2.193     2.191
imax            4.245     4.244     4.245
excite_mean     0.069     0.070     0.068
fracstop        1.000     1.000     1.000
cjmean          3.082     3.082     3.082

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       178.0     178.0     178.0
kozaiamp        180.0     179.9     179.9