Orbit Fit and Astrometric record for 13UF15

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: 13UF15    
# Created Tue Oct 24 01:38:18 2017
# Orbit generated from Bernstein formalism
# Fitting   35 observations of   38
# Arc:   7.97y
# First observation: 2010/10/08
#  Last observation: 2016/10/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.002763   0.033019  -0.000606   0.007223   0.027573   0.000000
# Chi-squared of fit:    13.47 DOF:   64 RMS:  0.11
# Min/Max residuals:    -0.36    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.677119E-05  3.213633E-02 -3.002554E-07  7.024060E-03  2.896327E-02 -1.076744E-03
# Covariance matrix:
  1.2311E-12 -5.3564E-13  2.0051E-13 -1.0383E-13 -3.3280E-13 -1.5782E-12
 -5.3564E-13  2.5892E-13 -1.0313E-13  5.3404E-14  1.7214E-13  8.1175E-13
  2.0051E-13 -1.0313E-13  3.4162E-13 -7.8238E-14 -6.9129E-14 -3.3955E-13
 -1.0383E-13  5.3404E-14 -7.8238E-14  2.3707E-14  3.5887E-14  1.7582E-13
 -3.3280E-13  1.7214E-13 -6.9129E-14  3.5887E-14  3.1550E-13  5.4384E-13
 -1.5782E-12  8.1175E-13 -3.3955E-13  1.7582E-13  5.4384E-13  2.6727E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.182754   34.353050    0.138918   -0.020342   -0.986593  2454758.702234
# Heliocentric elements and errors
Epoch:              2454750.5000  =  2008/10/11
Mean Anomaly:          349.92574 +/-     0.014
Argument of Peri:        8.76839 +/-     0.020
Long of Asc Node:       39.36629 +/-     0.000
Inclination:            12.38591 +/-     0.000
Eccentricity:         0.16398404 +/-    0.0001
Semi-Major Axis:     42.29656098 +/-    0.0034
Time of Perihelion: 2457562.1857 +/-       3.9
Perihelion:          35.36059989 +/-    0.0037
Aphelion:            49.23252207 +/-    0.0046
Period (y)              275.0843 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.39261210 +/-    0.0005
Ecliptic Y           19.91674948 +/-    0.0004
Ecliptic Z           -0.71267740 +/-    0.0000
Ecliptic XDOT        -0.00178091 +/-    0.0000
Ecliptic YDOT         0.00246056 +/-    0.0000
Ecliptic ZDOT         0.00066582 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.51211715 +/-    0.0005
Geocenter to KBO     34.52649042 +/-    0.0007
# Hcoef:  6.18

The following table shows the complete astrometric record for 13UF15. 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 (13UF15) followed by the observatory code and reference code for the source of the astrometry.

2008 10  19.20148  02 09 59.87   +11 51 26.5         13UF15    291  C~1vX4      
2008 10  19.22486  02 09 59.72   +11 51 26.2         13UF15    291  C~1vX4      
2008 10  19.24833  02 09 59.59   +11 51 25.6         13UF15    291  C~1vX4      
2010 10  08.39686  02 24 12.577  +13 54 20.43  21.6w 13UF15    F51  C~1vX4      
2010 10  08.39755  02 24 12.576  +13 54 20.43  21.6w 13UF15    F51  C~1vX4      
2010 10  08.41499  02 24 12.488  +13 54 19.99  21.8w 13UF15    F51  C~1vX4      
2010 10  08.43324  02 24 12.388  +13 54 19.63  21.8w 13UF15    F51  C~1vX4      
2010 10  08.45233  02 24 12.289  +13 54 19.22  21.6w 13UF15    F51  C~1vX4      
2010 10  08.45301  02 24 12.287  +13 54 19.22  21.6w 13UF15    F51  C~1vX4      
2010 10  08.58902  02 24 11.587  +13 54 16.13  21.5r 13UF15    F51  C~1vX4      
2010 10  08.60001  02 24 11.505  +13 54 15.72  21.6r 13UF15    F51  C~1vX4      
2011 12  02.24914  02 26 00.062  +14 32 39.29  21.4i 13UF15    F51  C~1vX4      
2011 12  02.26196  02 26 00.003  +14 32 39.26  21.5i 13UF15    F51  C~1vX4      
2011 12  02.27557  02 25 59.941  +14 32 38.77  21.5r 13UF15    F51  C~1vX4      
2011 12  02.28760  02 25 59.880  +14 32 38.39  21.6r 13UF15    F51  C~1vX4      
2013 07  18.59942  02 46 10.748  +16 47 23.60  21.7w 13UF15    F51  C~1vX4      
2013 07  18.60362  02 46 10.757  +16 47 23.72  21.7w 13UF15    F51  C~1vX4      
2013 07  18.60778  02 46 10.768  +16 47 23.69  21.5w 13UF15    F51  C~1vX4      
2013 07  18.61195  02 46 10.781  +16 47 23.91  21.6w 13UF15    F51  C~1vX4      
2013 10  25.36575  02 43 00.753  +16 41 42.20  21.4r 13UF15    F51  C~1vX4      
2013 10  25.37807  02 43 00.688  +16 41 42.14  21.2r 13UF15    F51  C~1vX4      
2013 10  25.52301  02 42 59.857  +16 41 38.99  21.3i 13UF15    F51  C~1vX4      
2013 10  25.53560  02 42 59.788  +16 41 38.75  21.0i 13UF15    F51  C~1vX4      
2013 10  30.34633  02 42 32.420  +16 39 55.31  21.6w 13UF15    F51  C~1vX4      
2013 10  30.36064  02 42 32.332  +16 39 55.15  21.6w 13UF15    F51  C~1vX4      
2013 10  30.48188  02 42 31.620  +16 39 52.50  21.4w 13UF15    F51  C~1vX4      
2013 10  30.49623  02 42 31.532  +16 39 52.15  21.6w 13UF15    F51  C~1vX4      
2014 10  28.53817  02 49 39.217  +17 37 06.59  21.7w 13UF15    F51  C~1vX4      
2014 10  28.55018  02 49 39.131  +17 37 06.38  21.3w 13UF15    F51  C~1vX4      
2014 10  28.56224  02 49 39.066  +17 37 06.08  21.6w 13UF15    F51  C~1vX4      
2014 10  28.57430  02 49 39.004  +17 37 05.92  21.1w 13UF15    F51  C~1vX4      
2014 12  11.21574  02 45 40.130  +17 22 06.19  21.6w 13UF15    F51  C~1vX4      
2014 12  11.22793  02 45 40.077  +17 22 06.07  21.6w 13UF15    F51  C~1vX4      
2014 12  11.24012  02 45 40.020  +17 22 05.64  21.7w 13UF15    F51  C~1vX4      
2014 12  11.25235  02 45 39.958  +17 22 05.44  21.5w 13UF15    F51  C~1vX4      
2016 10  07.45157  03 05 30.076  +19 32 33.20  21.9w 13UF15    F51  C~1zPh      
2016 10  07.47761  03 05 29.946  +19 32 32.79  21.8w 13UF15    F51  C~1zPh      
2016 10  07.49068  03 05 29.850  +19 32 32.71  22.0w 13UF15    F51  C~1zPh      

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 (   0.16)      0.00 (   0.85)
  2   0.0001     -2.17 (  -0.03)      0.46 (   1.21)
  3   0.0001     -4.17 (  -0.02)      0.53 (   1.19)
  4   1.9690  14223.82     0.03    2862.96     0.11
  5   1.9691  14223.81     0.07    2862.96     0.11
  6   1.9691  14222.45     0.08    2862.96     0.03
  7   1.9691  14220.94     0.01    2863.09     0.08
  8   1.9692  14219.44     0.01    2863.16     0.07
  9   1.9692  14219.41     0.04    2863.17     0.08
 10   1.9696  14208.72     0.04    2863.53    -0.13
 11   1.9696  14207.45    -0.36    2863.53    -0.18
 12   3.1185  16456.54    -0.03    4544.00    -0.08
 13   3.1186  16455.71     0.07    4544.25     0.11
 14   3.1186  16454.70     0.04    4544.07    -0.13
 15   3.1186  16453.73    -0.05    4544.00    -0.26
 16   4.7458  35917.63     0.04    6870.18    -0.03
 17   4.7458  35917.80    -0.00    6870.25     0.02
 18   4.7458  35917.94    -0.06    6870.18    -0.08
 19   4.7458  35918.19    -0.01    6870.33     0.05
 20   5.0162  33135.84    -0.08    7363.13     0.01
 21   5.0162  33134.91     0.06    7363.35     0.18
 22   5.0166  33122.25     0.05    7363.93     0.09
 23   5.0167  33121.21     0.11    7363.99     0.10
 24   5.0298  32704.55     0.12    7383.29    -0.16
 25   5.0299  32703.26     0.10    7383.52     0.00
 26   5.0302  32692.44     0.04    7384.06     0.00
 27   5.0302  32691.09    -0.03    7384.11    -0.01
 28   6.0242  39789.50     0.02    8884.11    -0.10
 29   6.0242  39788.22    -0.20    8884.27     0.01
 30   6.0243  39787.21    -0.15    8884.25    -0.06
 31   6.0243  39786.28    -0.01    8884.36    -0.00
 32   6.1438  36133.35    -0.01    9024.82     0.11
 33   6.1438  36132.57     0.06    9024.93     0.18
 34   6.1438  36131.63    -0.02    9024.76    -0.03
 35   6.1439  36130.70    -0.09    9024.83     0.00
 36   7.9678  55555.08     0.25   11866.00    -0.06
 37   7.9679  55553.06     0.15   11866.09    -0.12
 38   7.9679  55551.64    -0.32   11866.39     0.09

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.

13UF15    quality flag:3

Type:          5:3EE     5:3EE     5:3EE

axisobj        42.711    42.721    42.701
ecceobj         0.172     0.172     0.172
incobj         12.347    12.347    12.347
qmin           34.160    34.137    34.163
qmax           50.706    50.715    50.667
amean          42.328    42.328    42.328
amin           41.966    41.961    41.965
amax           42.754    42.753    42.759
emean           0.169     0.169     0.169
emin            0.148     0.148     0.148
emax            0.188     0.189     0.189
imean          11.166    11.159    11.169
imin           10.561    10.524    10.569
imax           12.013    12.014    12.013
excite_mean     0.257     0.257     0.257
fracstop        1.000     1.000     1.000
cjmean          3.004     3.005     3.004

libcent 0       180.2     180.0     181.2
libamp  0        40.1      42.5      37.4
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       185.6     186.8     185.0
kozaiamp        180.0     180.0     180.0