Orbit Fit and Astrometric record for 17FE173

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: 17FE173   
# Created Wed Dec 25 02:10:56 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     35 observations of     35
# Arc:   6.86y
# First observation: 2016/04/12
#  Last observation: 2023/02/19
# Chi-squared of fit:    42.95 DOF:     64 RMS:  0.20
# Min/Max residuals:    -0.41    0.62
# Exact a, adot, b, bdot, g, gdot:
  1.557274E-05  2.066778E-02  7.966920E-06  1.090725E-02  2.151813E-02  7.178364E-03
# Covariance matrix:
  1.2595E-13 -7.5853E-14  1.5910E-14 -2.6061E-14 -4.9327E-14 -4.0892E-13
 -7.5853E-14  1.1293E-13 -2.5912E-14  3.9216E-14 -6.2857E-14  6.5693E-13
  1.5910E-14 -2.5912E-14  9.5195E-14 -3.7650E-14  1.3925E-15 -1.9128E-13
 -2.6061E-14  3.9216E-14 -3.7650E-14  3.6539E-14  1.1466E-14  3.0001E-13
 -4.9327E-14 -6.2857E-14  1.3925E-15  1.1466E-14  6.0583E-13  2.7283E-15
 -4.0892E-13  6.5693E-13 -1.9128E-13  3.0001E-13  2.7283E-15  4.8789E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   14.289367 -156.571504    0.012108    0.246506   -0.967349  2457490.973432
# Heliocentric elements and errors
Epoch:              2457490.5000  =  2016/04/12
Mean Anomaly:            9.60852 +/-     0.008
Argument of Peri:      342.48334 +/-     0.010
Long of Asc Node:      178.81338 +/-     0.000
Inclination:            30.90087 +/-     0.000
Eccentricity:         0.60745345 +/-    0.0002
Semi-Major Axis:    107.14524500 +/-    0.0549
Time of Perihelion: 2446678.3576 +/-      11.9
Perihelion:          42.05949628 +/-    0.0301
Aphelion:           172.23099372 +/-    0.0907
Period (y)             1109.0920 +/-      0.85
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -42.24602753 +/-    0.0015
Ecliptic Y          -18.29451520 +/-    0.0007
Ecliptic Z           11.47068958 +/-    0.0004
Ecliptic XDOT         0.00054794 +/-    0.0000
Ecliptic YDOT        -0.00263556 +/-    0.0000
Ecliptic ZDOT         0.00157028 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.44438629 +/-    0.0014
Geocenter to KBO     46.47222441 +/-    0.0017
# Hcoef:  7.00

The following table shows the complete astrometric record for 17FE173. 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 (17FE173) followed by the observatory code and reference code for the source of the astrometry.

2016 04  12.472643 13 47 43.21   +04 11 49.5   23.5i 17FE173   568  C~3xsC      
2016 04  12.475108 13 47 43.20   +04 11 49.5   23.5i 17FE173   568  C~3xsC      
2016 04  12.477580 13 47 43.18   +04 11 49.6   23.3i 17FE173   568  C~3xsC      
2016 04  12.480062 13 47 43.18   +04 11 49.7   23.4i 17FE173   568  C~3xsC      
2016 04  12.482528 13 47 43.17   +04 11 49.7   23.4i 17FE173   568  C~3xsC      
2016 04  12.484996 13 47 43.16   +04 11 49.8   23.3i 17FE173   568  C~3xsC      
2016 04  12.487473 13 47 43.15   +04 11 49.9   23.5i 17FE173   568  C~3xsC      
2016 04  12.489936 13 47 43.13   +04 11 50.1   23.4i 17FE173   568  C~3xsC      
2016 04  12.492402 13 47 43.12   +04 11 50.1   23.5i 17FE173   568  C~3xsC      
2016 04  12.493823 13 47 43.12   +04 11 50.2   23.4i 17FE173   568  C~3xsC      
2017 03  02.320972 13 55 14.14   +03 57 39.9         17FE173   W84  C~3xsC      
2017 03  02.322106 13 55 14.13   +03 57 39.8   23.9g 17FE173   W84  C~3xsC      
2017 03  23.30306  13 54 15.595  +04 09 35.74  24.0r 17FE173   807  C~3wr4      
2017 03  24.24235  13 54 12.467  +04 10 07.78  24.0r 17FE173   807  C~3wr4      
2017 03  24.33174  13 54 12.179  +04 10 10.78  23.9r 17FE173   807  C~3wr4      
2017 03  30.346528 13 53 51.46   +04 13 30.5   23.6r 17FE173   W84  C~449d      
2017 03  31.382240 13 53 47.75   +04 14 04.5         17FE173   W84  C~449d      
2017 04  01.325278 13 53 44.38   +04 14 35.3   23.7r 17FE173   W84  C~3xsC      
2017 04  01.327031 13 53 44.36   +04 14 35.3   24.3g 17FE173   W84  C~3xsC      
2017 05  20.25283  13 50 43.782  +04 34 30.44        17FE173   G37  C~3wr4      
2017 05  20.29560  13 50 43.661  +04 34 31.24        17FE173   G37  C~3wr4      
2018 03  11.36008  14 00 04.817  +04 11 09.03        17FE173   304  C~3wr4      
2018 03  11.39862  14 00 04.712  +04 11 10.56  23.9r 17FE173   304  C~3wr4      
2018 03  12.36194  14 00 02.138  +04 11 43.30        17FE173   304  C~3wr4      
2018 03  12.39692  14 00 02.034  +04 11 44.66        17FE173   304  C~3wr4      
2018 03  12.40024  14 00 02.023  +04 11 44.66        17FE173   304  C~3wr4      
2018 03  12.40396  14 00 02.016  +04 11 44.88        17FE173   304  C~3wr4      
2018 04  12.278843 13 58 18.85   +04 28 36.9   23.3i 17FE173   W84  C~3xsC      
2018 04  12.280231 13 58 18.84   +04 28 36.8   23.5i 17FE173   W84  C~3xsC      
2018 05  14.27099  13 56 18.859  +04 41 18.72        17FE173   G37  C~3wr4      
2018 05  14.29438  13 56 18.784  +04 41 19.06        17FE173   G37  C~3wr4      
2019 02  28.34218  14 05 37.486  +04 13 06.05  23.9r 17FE173   304  C~3wr4      
2019 03  01.34582  14 05 35.585  +04 13 39.61  23.9r 17FE173   304  C~3wr4      
2023 02  18.36553  14 25 28.412  +04 38 52.31  24.0r 17FE173   304  C~6EpD      
2023 02  19.36943  14 25 27.602  +04 39 23.41  24.0r 17FE173   304  C~6EpD      

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    -0.07       0.00     0.04
     2   0.0000      0.00    -0.08       0.00    -0.04
     3   0.0000      0.00    -0.23       0.00    -0.01
     4   0.0000      0.00    -0.08       0.00     0.02
     5   0.0000      0.00    -0.09       0.00    -0.06
     6   0.0000      0.00    -0.09       0.00    -0.03
     7   0.0000      0.00    -0.10       0.00    -0.00
     8   0.0000      0.00    -0.25       0.00     0.12
     9   0.0001      0.00    -0.26       0.00     0.05
    10   0.0001      0.00    -0.18       0.00     0.11
    11   0.8866      0.00     0.25       0.00    -0.04
    12   0.8867      0.00     0.13       0.00    -0.18
    13   0.9441      0.00     0.35       0.00     0.14
    14   0.9467      0.00     0.09       0.00     0.46
    15   0.9469      0.00     0.33       0.00     0.45
    16   0.9634      0.00     0.36       0.00    -0.16
    17   0.9662      0.00     0.03       0.00    -0.09
    18   0.9688      0.00     0.18       0.00    -0.00
    19   0.9688      0.00    -0.03       0.00    -0.06
    20   1.1028      0.00     0.33       0.00    -0.01
    21   1.1029      0.00     0.62       0.00     0.21
    22   1.9107      0.00     0.16       0.00    -0.19
    23   1.9108      0.00     0.15       0.00     0.02
    24   1.9135      0.00     0.04       0.00    -0.18
    25   1.9136      0.00    -0.08       0.00    -0.02
    26   1.9136      0.00    -0.10       0.00    -0.13
    27   1.9136      0.00    -0.06       0.00    -0.04
    28   1.9981      0.00    -0.26       0.00    -0.02
    29   1.9981      0.00    -0.33       0.00    -0.16
    30   2.0857      0.00    -0.27       0.00    -0.11
    31   2.0858      0.00    -0.15       0.00    -0.16
    32   2.8799      0.00    -0.30       0.00    -0.14
    33   2.8826      0.00    -0.41       0.00     0.06
    34   6.8525      0.00     0.07       0.00     0.16
    35   6.8553      0.00     0.10       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.

17FE173    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       104.240   104.240   104.239
ecceobj         0.597     0.597     0.597
incobj         31.029    31.029    31.029
qmin           39.809    39.836    39.823
qmax          175.093   174.946   175.023
amean         105.302   105.304   105.302
amin          103.410   103.435   103.442
amax          108.059   108.050   108.128
emean           0.604     0.604     0.604
emin            0.590     0.591     0.590
emax            0.622     0.621     0.622
imean          30.139    30.140    30.139
imin           29.250    29.261    29.259
imax           30.959    30.958    30.959
excite_mean     0.786     0.786     0.786
fracstop        1.000     1.000     1.000
cjmean          2.864     2.864     2.864

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        94.8      94.9      94.7
kozaiamp        180.0     180.0     180.0