Orbit Fit and Astrometric record for 131318

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: 131318    
# Created Fri Dec  3 02:07:03 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     67 observations of     67
# Arc:  19.17y
# First observation: 2001/03/22
#  Last observation: 2020/05/23
# Chi-squared of fit:   170.83 DOF:    128 RMS:  0.28
# Min/Max residuals:    -1.05    0.59
# Exact a, adot, b, bdot, g, gdot:
  1.948554E-05  3.674857E-02 -5.235709E-06 -8.957267E-03  3.169978E-02  8.225272E-04
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.066411 -178.186426   -0.003240    0.000998   -1.000696  2451990.791333
# Heliocentric elements and errors
Epoch:              2451990.5000  =  2001/03/22
Mean Anomaly:            6.53503 +/-     0.000
Argument of Peri:      170.31351 +/-     0.000
Long of Asc Node:        2.07431 +/-     0.000
Inclination:            13.70868 +/-     0.000
Eccentricity:         0.17374529 +/-    0.0000
Semi-Major Axis:     39.30703206 +/-    0.0000
Time of Perihelion: 2450356.5127 +/-       0.0
Perihelion:          32.47762019 +/-    0.0000
Aphelion:            46.13644394 +/-    0.0000
Period (y)              246.4414 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.52624001 +/-    0.0000
Ecliptic Y           -1.02867476 +/-    0.0000
Ecliptic Z            0.03642099 +/-    0.0000
Ecliptic XDOT         0.00002021 +/-    0.0000
Ecliptic YDOT        -0.00317167 +/-    0.0000
Ecliptic ZDOT        -0.00077335 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.54250839 +/-    0.0000
Geocenter to KBO     31.54598156 +/-    0.0000
# Hcoef:  7.90

The following table shows the complete astrometric record for 131318. 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 (131318) followed by the observatory code and reference code for the source of the astrometry.

2001 03  22.29059  12 06 45.70   -00 39 37.3   22.5R 131318    695  Cf4951      
2001 03  22.30184  12 06 45.63   -00 39 36.9   22.4R 131318    695  Cf4951      
2001 03  22.31291  12 06 45.54   -00 39 36.5   22.2R 131318    695  Cf4951      
2001 03  23.32870  12 06 39.74   -00 39 03.9         131318    695  Cf4951      
2001 03  23.33833  12 06 39.69   -00 39 03.7   22.5R 131318    695  Cf4951      
2001 03  23.35053  12 06 39.60   -00 39 03.1   22. R 131318    695  Cf4951      
2001 03  30.41266  12 05 59.01   -00 35 18.4   22.5R 131318    695  Cf4951      
2001 03  30.42386  12 05 58.95   -00 35 18.2         131318    695  Cf4951      
2001 03  30.43495  12 05 58.87   -00 35 18.1         131318    695  Cf4951      
2001 03  31.41486  12 05 53.31   -00 34 47.2         131318    695  Cf4951      
2001 03  31.42442  12 05 53.25   -00 34 46.8   22.5R 131318    695  Cf4951      
2001 03  31.43458  12 05 53.20   -00 34 46.5         131318    695  Cf4951      
2002 03  22.44419  12 13 40.66   -01 58 01.9   22.4R 131318    568  Cf4951      
2002 03  22.49321  12 13 40.37   -01 58 00.3   22.5R 131318    568  Cf4951      
2002 03  22.52705  12 13 40.17   -01 57 59.1   22.5R 131318    568  Cf4951      
2002 04  06.29619  12 12 15.79   -01 50 12.5         131318    696  Cf4951      
2002 04  06.40949  12 12 15.17   -01 50 08.9         131318    696  Cf4951      
2003 04  29.33351  12 17 12.07   -02 57 23.6   22.4R 131318    568  Ch9859      
2003 04  29.40058  12 17 11.78   -02 57 22.1         131318    568  Ch9859      
2003 04  30.35953  12 17 07.38   -02 56 58.1         131318    568  Ch9859      
2006 02  22.35927  12 43 44.79   -07 19 35.4   23.0R 131318    304  Cq6941      
2006 02  22.37389  12 43 44.73   -07 19 35.1         131318    304  Cq6941      
2011 04  28.345742 13 12 42.001  -13 01 49.56  21.8G 131318    F51  C~43ZT      
2011 04  28.359821 13 12 41.930  -13 01 49.36  21.8G 131318    F51  C~43ZT      
2011 04  28.374059 13 12 41.838  -13 01 49.01  22.2G 131318    F51  C~43ZT      
2011 04  28.388179 13 12 41.775  -13 01 48.51  22.8G 131318    F51  C~43ZT      
2012 01  06.642019 13 25 53.787  -14 29 01.51  23.5G 131318    F51  C~43ZT      
2012 04  16.395600 13 20 47.233  -14 19 03.69  22.3G 131318    F51  C~43ZT      
2012 04  16.408804 13 20 47.129  -14 19 03.68  23.1G 131318    F51  C~43ZT      
2012 04  16.422013 13 20 47.053  -14 19 03.65  23.7G 131318    F51  C~43ZT      
2012 04  16.435260 13 20 47.000  -14 19 02.62  22.8G 131318    F51  C~43ZT      
2013 03  05.520978 13 31 36.775  -15 44 42.49  22.0G 131318    F51  C~43ZT      
2014 05  30.19439  13 31 13.345  -16 17 39.82  23.3R 131318    695              
2014 05  30.29663  13 31 12.928  -16 17 37.19        131318    695              
2014 05  30.31727  13 31 12.860  -16 17 36.67        131318    695              
2015 01  31.620089 13 47 01.666  -17 57 15.46  23.1G 131318    F51  C~43ZT      
2015 03  23.36763  13 44 27.82   -17 55 50.5   22.3R 131318    695  C~1QOS      
2015 03  23.49350  13 44 27.15   -17 55 48.2         131318    695  C~1QOS      
2015 04  14.09819  13 42 25.39   -17 47 45.1   23.3V 131318    W84  C~2JSm      
2015 04  14.17134  13 42 24.95   -17 47 43.3         131318    W84  C~2JSm      
2015 04  14.26595  13 42 24.38   -17 47 40.7         131318    W84  C~2JSm      
2015 04  18.36794  13 42 00.12   -17 45 49.8         131318    W84  C~1TzP      
2015 04  19.35463  13 41 54.27   -17 45 22.4   23.6V 131318    W84  C~1TzP      
2015 04  22.35506  13 41 36.54   -17 43 58.0         131318    W84  C~1TzP      
2016 03  05.517552 13 52 56.188  -19 04 43.01  23.4G 131318    F51  C~43ZT      
2016 03  06.476707 13 52 52.479  -19 04 38.07  22.7G 131318    F51  C~43ZT      
2016 03  06.487673 13 52 52.459  -19 04 37.92  22.7G 131318    F51  C~43ZT      
2016 03  06.498628 13 52 52.405  -19 04 37.31  22.8G 131318    F51  C~43ZT      
2016 03  06.509645 13 52 52.369  -19 04 37.60  22.6G 131318    F51  C~43ZT      
2017 03  27.510096 13 58 29.542  -20 04 51.98  22.8G 131318    F51  C~43ZT      
2017 03  27.530108 13 58 29.415  -20 04 51.45  22.9G 131318    F51  C~43ZT      
2017 03  27.540090 13 58 29.356  -20 04 51.18  22.7G 131318    F51  C~43ZT      
2017 04  01.492376 13 58 02.510  -20 03 24.67  23.2G 131318    F51  C~43ZT      
2017 04  01.514852 13 58 02.401  -20 03 23.95  23.4G 131318    F51  C~43ZT      
2017 04  01.526066 13 58 02.321  -20 03 23.81  23.3G 131318    F51  C~43ZT      
2017 04  25.439718 13 55 42.434  -19 54 00.22  23.5G 131318    F51  C~43ZT      
2018 04  13.478389 14 04 13.153  -21 02 35.80  23.0G 131318    F51  C~43ZT      
2019 01  10.644043 14 14 47.436  -21 54 40.87  23.7G 131318    F51  C~43ZT      
2019 04  04.484034 14 12 26.512  -22 07 13.27  24.3G 131318    F51  C~43ZT      
2019 05  01.422607 14 09 47.609  -21 57 15.09  23.7G 131318    F51  C~43ZT      
2019 05  25.330445 14 07 33.117  -21 46 00.27  23.5G 131318    F51  C~43ZT      
2019 05  25.343065 14 07 33.032  -21 45 59.90  22.8G 131318    F51  C~43ZT      
2019 05  25.355690 14 07 32.966  -21 45 59.08  23.3G 131318    F51  C~43ZT      
2019 05  25.368344 14 07 32.922  -21 45 59.21  23.1G 131318    F51  C~43ZT      
2020 04  22.462206 14 18 00.167  -23 00 59.97  22.8G 131318    F51  C~43ZT      
2020 04  26.462168 14 17 35.905  -22 59 24.86  23.4G 131318    F51  C~43ZT      
2020 05  23.332516 14 15 00.010  -22 47 15.30  23.4G 131318    F51  C~43ZT      

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     0.24
     2   0.0000      0.00    -0.21       0.00     0.28
     3   0.0001      0.00    -0.59       0.00     0.33
     4   0.0028      0.00     0.38       0.00     0.42
     5   0.0029      0.00     0.48       0.00     0.31
     6   0.0029      0.00     0.20       0.00     0.52
     7   0.0222      0.00     0.05       0.00     0.47
     8   0.0223      0.00     0.12       0.00     0.31
     9   0.0223      0.00    -0.12       0.00     0.06
    10   0.0250      0.00     0.10       0.00     0.13
    11   0.0250      0.00     0.02       0.00     0.23
    12   0.0250      0.00     0.15       0.00     0.21
    13   0.9997      0.00     0.59       0.00    -0.16
    14   0.9999      0.00     0.55       0.00    -0.12
    15   1.0000      0.00     0.52       0.00     0.00
    16   1.0404      0.00    -0.28       0.00    -0.37
    17   1.0407      0.00     0.06       0.00    -0.27
    18   2.1028      0.00    -0.39       0.00    -0.82
    19   2.1030      0.00    -0.03       0.00    -1.02
    20   2.1056      0.00    -0.87       0.00    -1.05
    21   4.9228      0.00    -0.32       0.00    -0.06
    22   4.9229      0.00    -0.27       0.00    -0.03
    23  10.1001      0.00    -0.17       0.00     0.22
    24  10.1001      0.00    -0.05       0.00    -0.01
    25  10.1002      0.00    -0.24       0.00    -0.10
    26  10.1002      0.00     0.00       0.00    -0.03
    27  10.7936      0.00    -0.18       0.00    -0.15
    28  11.0694      0.00     0.26       0.00     0.34
    29  11.0695      0.00    -0.13       0.00    -0.05
    30  11.0695      0.00    -0.09       0.00    -0.41
    31  11.0695      0.00     0.30       0.00     0.23
    32  11.9541      0.00    -0.33       0.00     0.02
    33  13.1880      0.00     0.17       0.00     0.18
    34  13.1882      0.00    -0.01       0.00     0.16
    35  13.1883      0.00     0.19       0.00     0.14
    36  13.8626      0.00    -0.03       0.00     0.07
    37  14.0016      0.00     0.02       0.00    -0.05
    38  14.0019      0.00    -0.04       0.00     0.03
    39  14.0611      0.00    -0.06       0.00    -0.04
    40  14.0613      0.00    -0.08       0.00    -0.16
    41  14.0615      0.00    -0.11       0.00    -0.06
    42  14.0728      0.00     0.32       0.00     0.03
    43  14.0755      0.00     0.22       0.00     0.14
    44  14.0837      0.00     0.42       0.00     0.22
    45  14.9548      0.00     0.10       0.00     0.17
    46  14.9574      0.00    -0.29       0.00    -0.37
    47  14.9574      0.00     0.07       0.00    -0.28
    48  14.9574      0.00    -0.08       0.00     0.27
    49  14.9575      0.00     0.04       0.00    -0.09
    50  16.0143      0.00     0.25       0.00    -0.14
    51  16.0143      0.00    -0.03       0.00     0.06
    52  16.0144      0.00    -0.11       0.00     0.17
    53  16.0279      0.00    -0.33       0.00    -0.27
    54  16.0280      0.00    -0.06       0.00     0.02
    55  16.0280      0.00    -0.31       0.00    -0.05
    56  16.0935      0.00    -0.07       0.00    -0.04
    57  17.0601      0.00     0.55       0.00     0.17
    58  17.8052      0.00    -0.05       0.00     0.02
    59  18.0348      0.00    -0.05       0.00    -0.16
    60  18.1085      0.00    -0.18       0.00     0.29
    61  18.1740      0.00     0.09       0.00    -0.04
    62  18.1740      0.00    -0.21       0.00    -0.03
    63  18.1740      0.00    -0.21       0.00     0.43
    64  18.1741      0.00     0.11       0.00    -0.06
    65  19.0860      0.00     0.40       0.00     0.02
    66  19.0970      0.00     0.10       0.00     0.27
    67  19.1705      0.00     0.14       0.00    -0.07

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.

131318    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.159    39.159    39.159
ecceobj         0.171     0.171     0.171
incobj         13.728    13.728    13.728
qmin           31.979    31.979    31.978
qmax           47.524    47.501    47.541
amean          39.456    39.456    39.456
amin           39.027    39.027    39.027
amax           39.925    39.925    39.925
emean           0.167     0.167     0.167
emin            0.142     0.142     0.142
emax            0.191     0.191     0.191
imean          14.348    14.349    14.348
imin           13.684    13.684    13.684
imax           15.055    15.055    15.055
excite_mean     0.299     0.299     0.299
fracstop        1.000     1.000     1.000
cjmean          2.949     2.949     2.949

libcent 0       180.0     180.0     180.0
libamp  0        84.9      84.9      84.9
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       175.1     175.0     175.1
kozaiamp        179.9     179.9     179.9