Orbit Fit and Astrometric record for 17FO161

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: 17FO161   
# Created Tue Nov 30 02:14:03 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     74 observations of     74
# Arc:   7.04y
# First observation: 2012/03/19
#  Last observation: 2019/04/03
# Chi-squared of fit:    92.31 DOF:    142 RMS:  0.20
# Min/Max residuals:    -0.57    0.68
# Exact a, adot, b, bdot, g, gdot:
  2.745943E-06  4.097403E-03  6.774188E-06  5.673187E-03  1.269874E-02 -2.078488E-03
# Covariance matrix:
  1.7730E-13 -5.6376E-14  5.2829E-14 -4.1767E-14 -8.1721E-14 -1.0019E-12
 -5.6376E-14  2.6934E-14 -3.4783E-14  2.7531E-14  3.7762E-14  6.6023E-13
  5.2829E-14 -3.4783E-14  1.7388E-13 -6.7751E-14 -5.8019E-14 -1.0717E-12
 -4.1767E-14  2.7531E-14 -6.7751E-14  4.0826E-14  4.5788E-14  8.4841E-13
 -8.1721E-14  3.7762E-14 -5.8019E-14  4.5788E-14  1.3167E-13  1.0988E-12
 -1.0019E-12  6.6023E-13 -1.0717E-12  8.4841E-13  1.0988E-12  2.0346E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.078450  162.581417   -0.283183   -0.051422   -0.956225  2456005.841676
# Heliocentric elements and errors
Epoch:              2456006.5000  =  2012/03/20
Mean Anomaly:          233.19284 +/-     0.065
Argument of Peri:      151.51455 +/-     0.049
Long of Asc Node:      164.97404 +/-     0.000
Inclination:            54.26914 +/-     0.001
Eccentricity:         0.42581868 +/-    0.0002
Semi-Major Axis:     59.70384213 +/-    0.0118
Time of Perihelion: 2515359.5616 +/-      44.5
Perihelion:          34.28083107 +/-    0.0124
Aphelion:            85.12685319 +/-    0.0198
Period (y)              461.3299 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -76.02409738 +/-    0.0021
Ecliptic Y           23.55714408 +/-    0.0007
Ecliptic Z           -4.22848510 +/-    0.0001
Ecliptic XDOT         0.00009500 +/-    0.0000
Ecliptic YDOT        -0.00095325 +/-    0.0000
Ecliptic ZDOT         0.00124554 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   79.70266143 +/-    0.0021
Geocenter to KBO     78.74821755 +/-    0.0023
# Hcoef:  4.35

The following table shows the complete astrometric record for 17FO161. 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 (17FO161) followed by the observatory code and reference code for the source of the astrometry.

2012 03  19.34091  10 51 02.998  +03 59 34.08  23.4G 17FO161   F51  C~36TC      
2012 03  19.35485  10 51 02.941  +03 59 34.45  22.8G 17FO161   F51  C~36TC      
2012 03  19.36881  10 51 02.867  +03 59 34.98  23.4G 17FO161   F51  C~36TC      
2012 03  19.38278  10 51 02.843  +03 59 35.23  23.0G 17FO161   F51  C~36TC      
2013 02  15.47177  10 53 47.080  +04 02 00.26  22.8G 17FO161   F51  C~36TC      
2013 03  05.41265  10 53 01.154  +04 07 40.57  23.0G 17FO161   F51  C~36TC      
2013 03  05.42761  10 53 01.104  +04 07 40.80  23.0G 17FO161   F51  C~36TC      
2013 03  05.44255  10 53 01.078  +04 07 40.98  23.0G 17FO161   F51  C~36TC      
2013 03  05.45750  10 53 01.016  +04 07 41.51  23.0G 17FO161   F51  C~36TC      
2014 01  24.55781  10 56 00.273  +04 08 35.73  22.7G 17FO161   F51  C~36TC      
2014 02  26.47064  10 54 42.636  +04 18 04.35  22.8G 17FO161   F51  C~36TC      
2014 02  26.48223  10 54 42.586  +04 18 04.28  22.2G 17FO161   F51  C~36TC      
2014 02  26.49376  10 54 42.576  +04 18 04.27  23.5G 17FO161   F51  C~36TC      
2014 02  26.50531  10 54 42.543  +04 18 04.87  23.4G 17FO161   F51  C~36TC      
2014 03  06.35211  10 54 22.204  +04 20 37.28  22.6G 17FO161   F51  C~36TC      
2015 01  16.51887  10 57 38.760  +04 19 23.62  23.4G 17FO161   F51  C~36TC      
2015 01  19.56130  10 57 33.478  +04 20 03.22        17FO161   F51  C~36TC      
2015 03  15.38034  10 55 23.067  +04 36 14.42  23.4G 17FO161   F51  C~36TC      
2015 03  15.39270  10 55 23.012  +04 36 14.61  22.8G 17FO161   F51  C~36TC      
2015 03  15.40502  10 55 22.983  +04 36 14.31  22.8G 17FO161   F51  C~36TC      
2015 04  22.28714  10 54 01.168  +04 47 24.86  22.9G 17FO161   F51  C~36TC      
2016 01  14.61112  10 59 06.044  +04 31 37.44  23.3G 17FO161   F51  C~36TC      
2016 01  14.62234  10 59 06.038  +04 31 38.02  23.3G 17FO161   F51  C~36TC      
2016 01  14.63360  10 59 06.013  +04 31 37.60  23.2G 17FO161   F51  C~36TC      
2016 01  14.64483  10 59 05.972  +04 31 37.96  23.1G 17FO161   F51  C~36TC      
2016 01  16.331389 10 59 03.26   +04 31 59.3         17FO161   W84  C~3k4s      
2016 01  16.332286 10 59 03.25   +04 31 59.1         17FO161   W84  C~3k4s      
2016 01  17.57835  10 59 01.160  +04 32 14.82  23.0G 17FO161   F51  C~36TC      
2016 01  17.59041  10 59 01.136  +04 32 15.38  22.4G 17FO161   F51  C~36TC      
2016 01  17.60245  10 59 01.091  +04 32 15.38  23.1G 17FO161   F51  C~36TC      
2016 01  21.58499  10 58 54.046  +04 33 08.83  23.0G 17FO161   F51  C~36TC      
2016 03  31.35271  10 56 06.289  +04 54 19.82  22.8G 17FO161   F51  C~36TC      
2016 03  31.36496  10 56 06.273  +04 54 20.08  23.8G 17FO161   F51  C~36TC      
2016 03  31.37721  10 56 06.239  +04 54 20.11  22.8G 17FO161   F51  C~36TC      
2016 03  31.38951  10 56 06.210  +04 54 20.45  23.0G 17FO161   F51  C~36TC      
2017 01  02.57475  11 00 45.452  +04 42 18.03  22.5G 17FO161   F51  C~36TC      
2017 01  02.58652  11 00 45.446  +04 42 18.20  24.1G 17FO161   F51  C~36TC      
2017 01  02.59825  11 00 45.422  +04 42 18.22  23.2G 17FO161   F51  C~36TC      
2017 01  02.61002  11 00 45.408  +04 42 18.33  23.0G 17FO161   F51  C~36TC      
2017 02  16.52162  10 59 19.085  +04 53 18.24  23.1G 17FO161   F51  C~36TC      
2017 03  18.29191  10 58 02.465  +05 02 58.59  23.2G 17FO161   F51  C~36TC      
2017 03  18.30358  10 58 02.404  +05 02 58.68  23.1G 17FO161   F51  C~36TC      
2017 03  18.31522  10 58 02.386  +05 02 58.84  23.2G 17FO161   F51  C~36TC      
2017 03  18.32694  10 58 02.318  +05 02 59.26  23.7G 17FO161   F51  C~36TC      
2017 03  23.13730  10 57 50.425  +05 04 32.22  24.1r 17FO161   807  C~2b81      
2017 03  23.13730  10 57 50.39   +05 04 32.1   23.3V 17FO161   W84  C~2y3A      
2017 03  23.19683  10 57 50.260  +05 04 33.54        17FO161   807  C~2b81      
2017 03  23.19683  10 57 50.24   +05 04 33.2         17FO161   W84  C~2y3A      
2017 03  24.14054  10 57 47.960  +05 04 51.33        17FO161   807  C~2b81      
2017 03  24.14054  10 57 47.94   +05 04 51.2         17FO161   W84  C~2y3A      
2017 05  20.17658  10 56 17.838  +05 18 18.36        17FO161   G37  C~2b81      
2017 05  20.19927  10 56 17.811  +05 18 18.56        17FO161   G37  C~2b81      
2017 05  20.24493  10 56 17.795  +05 18 19.03        17FO161   G37  C~2b81      
2017 05  20.27484  10 56 17.764  +05 18 18.94        17FO161   G37  C~2b81      
2018 03  07.24780  10 59 56.061  +05 12 09.72        17FO161   G37  C~2b81      
2018 03  07.30383  10 59 55.912  +05 12 10.70        17FO161   G37  C~2b81      
2018 03  10.39254  10 59 47.870  +05 13 12.25  22.9G 17FO161   F51  C~35ci      
2018 03  10.41609  10 59 47.812  +05 13 12.53  23.7G 17FO161   F51  C~35ci      
2018 03  12.23446  10 59 43.088  +05 13 49.05  24.0r 17FO161   304  C~2b81      
2018 03  12.29836  10 59 42.914  +05 13 50.49        17FO161   304  C~2b81      
2018 03  18.38945  10 59 27.316  +05 15 49.47  22.7G 17FO161   F51  C~35ci      
2018 03  19.162101 10 59 25.35   +05 16 04.6   24.1V 17FO161   W84  C~3k4s      
2018 03  19.163252 10 59 25.35   +05 16 04.5   23.4V 17FO161   W84  C~3k4s      
2018 04  13.30082  10 58 28.072  +05 23 39.83  23.1G 17FO161   F51  C~35ci      
2018 04  13.31222  10 58 28.031  +05 23 40.09  23.0G 17FO161   F51  C~35ci      
2018 04  13.32358  10 58 28.005  +05 23 40.24  22.5G 17FO161   F51  C~35ci      
2018 04  13.33501  10 58 27.955  +05 23 40.18  22.7G 17FO161   F51  C~35ci      
2019 01  15.52290  11 03 17.483  +05 10 12.23  22.9G 17FO161   F51  C~35ci      
2019 01  15.53529  11 03 17.464  +05 10 12.58  22.9G 17FO161   F51  C~35ci      
2019 01  15.54775  11 03 17.447  +05 10 12.64  22.9G 17FO161   F51  C~35ci      
2019 02  04.53245  11 02 38.439  +05 15 18.24  23.7G 17FO161   F51  C~35ci      
2019 04  03.29544  11 00 14.180  +05 33 42.44  23.3G 17FO161   F51  C~35ci      
2019 04  03.31786  11 00 14.157  +05 33 42.73  22.7G 17FO161   F51  C~35ci      
2019 04  03.32910  11 00 14.132  +05 33 42.81  22.9G 17FO161   F51  C~35ci      

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     0.47       0.00    -0.13
     2   0.0000      0.00     0.14       0.00    -0.03
     3   0.0001      0.00    -0.45       0.00     0.23
     4   0.0001      0.00    -0.28       0.00     0.21
     5   0.9121      0.00     0.07       0.00    -0.05
     6   0.9612      0.00     0.19       0.00     0.10
     7   0.9612      0.00     0.03       0.00     0.04
     8   0.9613      0.00     0.23       0.00    -0.07
     9   0.9613      0.00    -0.11       0.00     0.17
    10   1.8514      0.00     0.68       0.00    -0.16
    11   1.9415      0.00    -0.11       0.00     0.23
    12   1.9415      0.00    -0.41       0.00    -0.06
    13   1.9416      0.00    -0.10       0.00    -0.29
    14   1.9416      0.00    -0.14       0.00     0.09
    15   1.9631      0.00    -0.22       0.00     0.03
    16   2.8287      0.00    -0.37       0.00     0.04
    17   2.8370      0.00    -0.00       0.00     0.18
    18   2.9871      0.00     0.09       0.00     0.21
    19   2.9871      0.00    -0.25       0.00     0.16
    20   2.9872      0.00    -0.21       0.00    -0.38
    21   3.0909      0.00    -0.18       0.00    -0.15
    22   3.8228      0.00    -0.10       0.00    -0.24
    23   3.8228      0.00     0.09       0.00     0.20
    24   3.8228      0.00    -0.01       0.00    -0.35
    25   3.8229      0.00    -0.35       0.00    -0.13
    26   3.8275      0.00     0.15       0.00     0.13
    27   3.8275      0.00     0.02       0.00    -0.08
    28   3.8309      0.00     0.17       0.00    -0.22
    29   3.8309      0.00     0.12       0.00     0.18
    30   3.8310      0.00    -0.23       0.00     0.02
    31   3.8419      0.00     0.39       0.00    -0.10
    32   4.0329      0.00    -0.03       0.00    -0.04
    33   4.0329      0.00     0.15       0.00     0.00
    34   4.0330      0.00     0.07       0.00    -0.19
    35   4.0330      0.00     0.06       0.00    -0.08
    36   4.7919      0.00    -0.03       0.00    -0.08
    37   4.7919      0.00     0.08       0.00    -0.02
    38   4.7919      0.00    -0.08       0.00    -0.11
    39   4.7920      0.00    -0.08       0.00    -0.11
    40   4.9149      0.00    -0.12       0.00    -0.10
    41   4.9964      0.00     0.29       0.00     0.05
    42   4.9965      0.00    -0.18       0.00    -0.08
    43   4.9965      0.00    -0.00       0.00    -0.15
    44   4.9965      0.00    -0.57       0.00     0.04
    45   5.0097      0.00    -0.06       0.00    -0.02
    46   5.0097      0.00     0.47       0.00     0.10
    47   5.0099      0.00    -0.08       0.00    -0.05
    48   5.0099      0.00     0.22       0.00     0.29
    49   5.0125      0.00    -0.05       0.00    -0.05
    50   5.0125      0.00     0.25       0.00     0.08
    51   5.1686      0.00     0.43       0.00     0.03
    52   5.1687      0.00     0.19       0.00     0.06
    53   5.1688      0.00     0.28       0.00     0.19
    54   5.1689      0.00     0.03       0.00    -0.12
    55   5.9655      0.00    -0.06       0.00    -0.05
    56   5.9657      0.00    -0.07       0.00    -0.18
    57   5.9741      0.00     0.00       0.00     0.16
    58   5.9742      0.00     0.07       0.00    -0.03
    59   5.9792      0.00     0.02       0.00     0.43
    60   5.9793      0.00    -0.08       0.00     0.61
    61   5.9960      0.00     0.09       0.00     0.01
    62   5.9981      0.00    -0.09       0.00    -0.01
    63   5.9981      0.00    -0.05       0.00    -0.13
    64   6.0670      0.00     0.20       0.00    -0.02
    65   6.0670      0.00    -0.07       0.00     0.05
    66   6.0670      0.00    -0.12       0.00     0.02
    67   6.0671      0.00    -0.52       0.00    -0.23
    68   6.8260      0.00    -0.06       0.00    -0.09
    69   6.8260      0.00    -0.04       0.00     0.10
    70   6.8260      0.00     0.02       0.00    -0.01
    71   6.8807      0.00     0.06       0.00    -0.08
    72   7.0389      0.00    -0.35       0.00     0.16
    73   7.0390      0.00     0.08       0.00     0.05
    74   7.0390      0.00     0.09       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.

17FO161    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        59.652    59.652    59.653
ecceobj         0.427     0.427     0.427
incobj         54.371    54.371    54.371
qmin           31.852    32.227    33.457
qmax           89.436    89.126    87.622
amean          59.892    60.004    59.875
amin           59.095    59.250    59.160
amax           60.936    60.910    60.803
emean           0.442     0.433     0.430
emin            0.421     0.415     0.419
emax            0.470     0.464     0.441
imean          53.000    53.242    53.294
imin           52.289    52.513    52.921
imax           53.600    53.774    53.658
excite_mean     0.913     0.911     0.910
fracstop        1.000     1.000     1.000
cjmean          2.025     2.024     2.024

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       174.8     194.6     180.9
kozaiamp         36.7      45.8      30.5