Orbit Fit and Astrometric record for 13UM17

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: 13UM17    
# Created Sat Dec 16 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   44 observations of   46
# Arc:  10.32y
# First observation: 2004/09/21
#  Last observation: 2015/01/18
Preliminary a, adot, b, bdot, g, gdot:
  -0.000031   0.024358  -0.000016  -0.005596   0.026347   0.000000
# Chi-squared of fit:    23.63 DOF:   82 RMS:  0.13
# Min/Max residuals:    -0.36    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.587316E-05  2.446019E-02 -3.596014E-06 -5.638104E-03  2.510123E-02  1.775951E-03
# Covariance matrix:
  4.8849E-13 -1.0091E-13 -4.0876E-15  1.1812E-14 -5.1101E-14 -2.1221E-13
 -1.0091E-13  1.6478E-13  1.2791E-14 -3.7042E-14  1.3739E-13  6.6616E-13
 -4.0876E-15  1.2791E-14  4.7257E-13 -5.2749E-14  1.0726E-14  5.3631E-14
  1.1812E-14 -3.7042E-14 -5.2749E-14  1.4292E-14 -3.0714E-14 -1.5541E-13
 -5.1101E-14  1.3739E-13  1.0726E-14 -3.0714E-14  2.1288E-13  5.4946E-13
 -2.1221E-13  6.6616E-13  5.3631E-14 -1.5541E-13  5.4946E-13  2.7957E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.603838    3.106764    0.078556    0.010669   -1.004947  2453269.908363
# Heliocentric elements and errors
Epoch:              2453260.5000  =  2004/09/12
Mean Anomaly:           59.25062 +/-     0.027
Argument of Peri:      110.21184 +/-     0.035
Long of Asc Node:      185.54678 +/-     0.000
Inclination:            13.01965 +/-     0.000
Eccentricity:         0.07642329 +/-    0.0001
Semi-Major Axis:     42.29742628 +/-    0.0023
Time of Perihelion: 2436723.3844 +/-       7.3
Perihelion:          39.06491793 +/-    0.0033
Aphelion:            45.52993463 +/-    0.0036
Period (y)              275.0927 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.78148838 +/-    0.0007
Ecliptic Y            2.13669236 +/-    0.0001
Ecliptic Z            0.41972424 +/-    0.0000
Ecliptic XDOT         0.00005365 +/-    0.0000
Ecliptic YDOT         0.00266778 +/-    0.0000
Ecliptic ZDOT        -0.00061278 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.83958150 +/-    0.0007
Geocenter to KBO     39.83867982 +/-    0.0007
# Hcoef:  7.67

The following table shows the complete astrometric record for 13UM17. 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 (13UM17) followed by the observatory code and reference code for the source of the astrometry.

2004 09  21.40762  00 10 26.60   +01 47 21.9   23.4r 13UM17    568  C~2NKZ      
2004 09  21.43876  00 10 26.45   +01 47 21.0   23.5r 13UM17    568  C~2NKZ      
2004 09  21.46760  00 10 26.35   +01 47 20.0   23.8r 13UM17    568  C~2NKZ      
2004 09  22.41259  00 10 22.08   +01 46 49.9   23.2r 13UM17    568  C~2NKZ      
2013 08  02.51631  01 03 07.488  +04 22 09.95  23.9r 13UM17    568  C~2NKZ      
2013 08  02.55904  01 03 07.429  +04 22 09.23  23.6r 13UM17    568  C~2NKZ      
2013 08  30.43177  01 02 03.856  +04 12 46.77  23.6r 13UM17    568  C~2NKZ      
2013 08  31.43593  01 02 00.592  +04 12 20.92  23.5r 13UM17    568  C~2NKZ      
2013 08  31.47896  01 02 00.443  +04 12 19.80  23.7r 13UM17    568  C~2NKZ      
2013 09  04.41593  01 01 46.995  +04 10 35.12  23.9r 13UM17    568  C~2NKZ      
2013 09  04.45871  01 01 46.840  +04 10 33.93  23.6r 13UM17    568  C~2NKZ      
2013 10  06.39713  00 59 34.480  +03 54 30.56  23.5r 13UM17    568  C~2NKZ      
2013 10  06.47088  00 59 34.156  +03 54 28.28  24.1r 13UM17    568  C~2NKZ      
2013 10  06.47992  00 59 34.095  +03 54 27.99  23.6r 13UM17    568  C~2NKZ      
2013 10  09.52057  00 59 20.365  +03 52 52.67  23.7r 13UM17    568  C~2NKZ      
2013 10  31.23884  00 57 45.553  +03 42 06.78  23.7r 13UM17    568  C~2NKZ      
2013 10  31.28183  00 57 45.374  +03 42 05.65  23.7r 13UM17    568  C~2NKZ      
2013 10  31.32461  00 57 45.195  +03 42 04.43  23.5r 13UM17    568  C~2NKZ      
2013 11  01.26510  00 57 41.372  +03 41 38.86  23.6r 13UM17    568  C~2NKZ      
2013 11  01.38800  00 57 40.851  +03 41 35.66  23.7r 13UM17    568  C~2NKZ      
2013 11  05.42210  00 57 24.829  +03 39 49.01  23.8r 13UM17    568  C~2NKZ      
2013 11  29.22781  00 56 08.335  +03 31 30.92  23.7r 13UM17    568  C~2NKZ      
2013 11  29.23325  00 56 08.340  +03 31 30.86  24.0r 13UM17    568  C~2NKZ      
2013 11  29.23812  00 56 08.310  +03 31 30.77  23.8r 13UM17    568  C~2NKZ      
2013 11  29.27951  00 56 08.221  +03 31 30.43  23.4r 13UM17    568  C~2NKZ      
2013 11  29.28398  00 56 08.199  +03 31 29.71  24.2r 13UM17    568  C~2NKZ      
2013 11  29.30546  00 56 08.138  +03 31 29.81  23.7r 13UM17    568  C~2NKZ      
2013 12  04.25494  00 55 57.122  +03 30 20.13  23.7r 13UM17    568  C~2NKZ      
2013 12  04.30703  00 55 57.014  +03 30 19.19  23.7r 13UM17    568  C~2NKZ      
2013 12  05.25309  00 55 55.147  +03 30 07.43  23.6r 13UM17    568  C~2NKZ      
2014 07  27.57602  01 08 37.319  +04 37 12.65  23.9r 13UM17    568  C~2NKZ      
2014 08  22.55261  01 07 55.088  +04 29 59.82  23.8r 13UM17    568  C~2NKZ      
2014 08  28.41447  01 07 38.546  +04 27 42.04  23.6r 13UM17    568  C~2NKZ      
2014 10  23.36792  01 03 49.083  +04 00 08.53  23.4r 13UM17    568  C~2NKZ      
2014 10  25.28038  01 03 40.755  +03 59 12.85  23.9r 13UM17    568  C~2NKZ      
2014 10  25.30740  01 03 40.653  +03 59 12.15  24.8u 13UM17    568  C~2NKZ      
2014 10  25.31593  01 03 40.602  +03 59 12.22  24.7u 13UM17    568  C~2NKZ      
2014 10  25.33867  01 03 40.493  +03 59 11.35  23.2r 13UM17    568  C~2NKZ      
2014 10  27.31342  01 03 31.987  +03 58 14.40  24.1r 13UM17    568  C~2NKZ      
2014 10  27.35865  01 03 31.788  +03 58 13.20  24.7u 13UM17    568  C~2NKZ      
2014 10  27.36433  01 03 31.770  +03 58 12.95  23.8r 13UM17    568  C~2NKZ      
2014 10  27.40661  01 03 31.589  +03 58 11.78  23.8r 13UM17    568  C~2NKZ      
2014 11  24.23611  01 01 48.939  +03 47 06.94  24.0r 13UM17    568  C~2NKZ      
2014 11  25.23226  01 01 46.082  +03 46 49.05  23.9r 13UM17    568  C~2NKZ      
2014 12  17.26663  01 01 02.274  +03 42 25.35  24.0r 13UM17    568  C~2NKZ      
2015 01  18.22018  01 01 14.833  +03 44 14.66  24.1r 13UM17    568  C~2NKZ      

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    -0.10       0.00     0.01
  2   0.0001     -2.42    -0.15       0.07     0.16
  3   0.0002     -4.19     0.27      -0.25    -0.09
  4   0.0028    -74.90 (   0.22)     -2.43 (   0.72)
  5   8.8627  48066.98     0.11  -10224.71    -0.05
  6   8.8628  48065.83    -0.01  -10225.03    -0.14
  7   8.9391  46912.98    -0.26  -10374.54     0.00
  8   8.9419  46855.07     0.08  -10379.33    -0.06
  9   8.9420  46852.45     0.03  -10379.49    -0.05
 10   8.9528  46614.67     0.07  -10397.48    -0.01
 11   8.9529  46611.94     0.05  -10397.67    -0.03
 12   9.0404  44304.04     0.04  -10510.13    -0.08
 13   9.0406  44298.43     0.26  -10510.33    -0.13
 14   9.0406  44297.43    -0.02  -10510.24    -0.02
 15   9.0489  44060.44    -0.35  -10517.42     0.19
 16   9.1084  42431.66    -0.08  -10554.85    -0.04
 17   9.1085  42428.62    -0.06  -10554.83     0.01
 18   9.1086  42425.55    -0.08  -10554.90    -0.04
 19   9.1112  42360.17     0.05  -10555.94    -0.06
 20   9.1115  42351.37    -0.07  -10555.82     0.13
 21   9.1226  42077.64     0.03  -10559.69    -0.02
 22   9.1877  40777.01    -0.00  -10567.42    -0.00
 23   9.1877  40777.06     0.27  -10567.51    -0.09
 24   9.1878  40776.59     0.01  -10567.41    -0.00
 25   9.1879  40775.17     0.34  -10567.19     0.19
 26   9.1879  40774.57    -0.08  -10567.74    -0.36
 27   9.1879  40773.73    -0.01  -10567.28     0.09
 28   9.2015  40587.49    -0.15  -10566.42     0.11
 29   9.2016  40585.56    -0.24  -10566.65    -0.16
 30   9.2042  40554.02    -0.13  -10566.46    -0.18
 31   9.8458  53275.88    -0.00  -11357.75     0.05
 32   9.9169  52477.30     0.13  -11514.68     0.12
 33   9.9329  52177.66    -0.06  -11545.78     0.03
 34  10.0861  48143.29    -0.17  -11727.59    -0.00
 35  10.0914  47999.23    -0.07  -11729.96     0.08
 36  10.0914  47997.46     0.22  -11730.00     0.05
 37  10.0915  47996.74 (   0.15) -11729.63 (   0.43)
 38  10.0915  47994.80    -0.06  -11729.79     0.28
 39  10.0969  47847.67    -0.08  -11732.27     0.04
 40  10.0971  47844.29    -0.07  -11732.20     0.13
 41  10.0971  47843.92    -0.01  -11732.33     0.00
 42  10.0972  47840.81     0.06  -11732.35     0.01
 43  10.1734  46077.68    -0.04  -11740.45    -0.04
 44  10.1761  46028.94     0.05  -11740.08    -0.06
 45  10.2364  45286.45     0.33  -11724.31    -0.01
 46  10.3239  45512.72    -0.04  -11697.00     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.

13UM17    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.773    42.780    42.766
ecceobj         0.081     0.081     0.081
incobj         12.951    12.951    12.951
qmin           38.484    38.540    38.365
qmax           46.851    46.831    46.759
amean          42.519    42.526    42.510
amin           42.171    42.187    42.154
amax           42.874    42.886    42.861
emean           0.074     0.074     0.074
emin            0.055     0.056     0.055
emax            0.093     0.092     0.093
imean          13.417    13.407    13.436
imin           12.714    12.714    12.714
imax           14.140    14.138    14.150
excite_mean     0.244     0.243     0.244
fracstop        1.000     1.000     1.000
cjmean          3.014     3.014     3.014

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       178.9     179.1     179.5
kozaiamp        180.0     180.0     180.0