Orbit Fit and Astrometric record for 13UO15

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: 13UO15    
# Created Mon Dec 18 02:37:57 2017
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   25
# Arc:   4.14y
# First observation: 2013/08/02
#  Last observation: 2017/09/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000175   0.021817  -0.000008   0.000976   0.023071   0.000000
# Chi-squared of fit:     4.52 DOF:   44 RMS:  0.08
# Min/Max residuals:    -0.23    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.478082E-05  2.159480E-02  6.260468E-07  9.685772E-04  2.298741E-02  1.477744E-03
# Covariance matrix:
  1.6085E-13 -6.8632E-14  1.3091E-15 -1.5411E-15  6.6974E-14 -4.7139E-13
 -6.8632E-14  2.7058E-13 -2.5397E-15  1.0446E-14  1.3302E-13  3.2100E-12
  1.3091E-15 -2.5397E-15  9.9993E-14 -4.4168E-14 -6.3732E-17 -3.8496E-14
 -1.5411E-15  1.0446E-14 -4.4168E-14  4.7034E-14  5.6490E-15  1.5048E-13
  6.6974E-14  1.3302E-13 -6.3732E-17  5.6490E-15  1.9330E-13  1.7390E-12
 -4.7139E-13  3.2100E-12 -3.8496E-14  1.5048E-13  1.7390E-12  4.6236E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.787938   17.535458    0.938829   -0.018959   -0.389949  2456507.036518
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          101.87014 +/-     0.158
Argument of Peri:      205.12974 +/-     0.151
Long of Asc Node:       64.13942 +/-     0.006
Inclination:             3.72496 +/-     0.000
Eccentricity:         0.04599676 +/-    0.0003
Semi-Major Axis:     43.40469503 +/-    0.0031
Time of Perihelion: 2426944.3484 +/-      45.8
Perihelion:          41.40821956 +/-    0.0129
Aphelion:            45.40117049 +/-    0.0130
Period (y)              285.9653 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.08635966 +/-    0.0008
Ecliptic Y           12.31703700 +/-    0.0002
Ecliptic Z           -2.11585092 +/-    0.0000
Ecliptic XDOT        -0.00060818 +/-    0.0000
Ecliptic YDOT         0.00250630 +/-    0.0000
Ecliptic ZDOT         0.00010680 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.90270942 +/-    0.0008
Geocenter to KBO     43.50208160 +/-    0.0008
# Hcoef:  6.89

The following table shows the complete astrometric record for 13UO15. 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 (13UO15) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.53574  01 08 56.384  +04 18 21.14  23.3r 13UO15    568  C~2NKU      
2013 08  02.57845  01 08 56.332  +04 18 20.74  23.3r 13UO15    568  C~2NKU      
2013 08  30.45291  01 07 56.439  +04 10 54.08  22.8r 13UO15    568  C~2NKU      
2013 08  30.45765  01 07 56.413  +04 10 54.20  22.8r 13UO15    568  C~2NKU      
2013 08  31.45558  01 07 53.310  +04 10 32.75  23.1r 13UO15    568  C~2NKU      
2013 08  31.52122  01 07 53.112  +04 10 31.32  23.1r 13UO15    568  C~2NKU      
2013 10  06.41689  01 05 33.314  +03 55 35.60  23.0r 13UO15    568  C~2NKU      
2013 10  31.25837  01 03 47.215  +03 45 11.62  23.2r 13UO15    568  C~25nm      
2013 10  31.30132  01 03 47.036  +03 45 10.65  23.2r 13UO15    568  C~25nm      
2013 10  31.34404  01 03 46.868  +03 45 09.72  23.2r 13UO15    568  C~25nm      
2013 11  01.28510  01 03 43.092  +03 44 48.46  23.0r 13UO15    568  C~2NKU      
2013 11  01.41360  01 03 42.570  +03 44 45.57  23.2r 13UO15    568  C~2NKU      
2014 06  27.60559  01 13 09.921  +04 49 55.75  23.4r 13UO15    568  C~2NKU      
2014 06  28.61065  01 13 11.828  +04 50 04.04  23.0r 13UO15    568  C~2NKU      
2014 07  24.55698  01 13 32.522  +04 50 41.26  23.3r 13UO15    568  C~25nm      
2014 07  27.58768  01 13 31.316  +04 50 23.72  23.3r 13UO15    568  C~2NKU      
2014 08  22.55650  01 12 51.345  +04 45 01.53  23.3r 13UO15    568  C~2NKU      
2014 08  28.41844  01 12 35.606  +04 43 11.19  23.4r 13UO15    568  C~2NKU      
2014 11  24.28276  01 06 55.587  +04 09 22.23  23.5r 13UO15    568  C~2NKU      
2014 11  25.30908  01 06 52.605  +04 09 07.58  23.3r 13UO15    568  C~2NKU      
2014 12  17.26271  01 06 06.840  +04 05 56.05  23.6r 13UO15    568  C~2NKU      
2015 01  17.24366  01 06 10.312  +04 08 42.63  23.3r 13UO15    568  C~2NKU      
2015 12  07.38604  01 10 53.680  +04 38 12.62  23.3w 13UO15    568  C~2NKU      
2017 09  23.35779  01 24 40.90   +06 06 52.5   23.0R 13UO15    G37  C~2LSm      
2017 09  23.44459  01 24 40.54   +06 06 50.4         13UO15    G37  C~2LSm      

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     0.02       0.00     0.01
  2   0.0001     -0.87     0.01      -0.07     0.05
  3   0.0764   -999.38     0.08     -72.22    -0.01
  4   0.0764   -999.69     0.01     -71.96     0.25
  5   0.0792  -1050.78    -0.11     -74.12     0.06
  6   0.0794  -1054.07     0.06     -74.32    -0.04
  7   0.1776  -3329.58    -0.04    -105.49     0.02
  8   0.2456  -5036.15    -0.04     -76.33     0.01
  9   0.2458  -5039.00    -0.08     -76.20     0.03
 10   0.2459  -5041.68     0.04     -76.10     0.02
 11   0.2485  -5102.07     0.01     -74.17     0.04
 12   0.2488  -5110.40     0.03     -73.86     0.02
 13   0.9009   4227.03    -0.01     313.34    -0.01
 14   0.9037   4256.56     0.02     310.21    -0.02
 15   0.9747   4557.04    -0.05     227.43    -0.05
 16   0.9830   4533.70     0.03     218.02    -0.02
 17   1.0541   3858.41    -0.02     146.29     0.04
 18   1.0702   3598.78     0.01     133.40     0.03
 19   1.3107  -1876.17    -0.01     189.54    -0.10
 20   1.3135  -1923.00     0.04     192.99    -0.12
 21   1.3737  -2629.11     0.01     276.86    -0.14
 22   1.4585  -2517.57     0.02     411.07    -0.15
 23   2.3459   2075.37    -0.02     435.43    -0.23
 24   4.1419  15552.26     0.04     702.45     0.10
 25   4.1421  15546.46    -0.04     702.52     0.18

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.

13UO15    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.634    43.644    43.624
ecceobj         0.047     0.048     0.047
incobj          3.724     3.724     3.724
qmin           40.763    40.736    40.787
qmax           46.200    46.244    46.198
amean          43.381    43.391    43.371
amin           43.043    43.056    43.036
amax           43.723    43.744    43.717
emean           0.038     0.039     0.038
emin            0.020     0.020     0.019
emax            0.057     0.058     0.057
imean           2.020     2.021     2.017
imin            1.148     1.150     1.143
imax            2.807     2.807     2.807
excite_mean     0.053     0.053     0.052
fracstop        1.000     1.000     1.000
cjmean          3.091     3.091     3.091

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       188.9     189.3     189.0
kozaiamp        180.0     180.0     180.0