Orbit Fit and Astrometric record for 15FU403

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: 15FU403   
# Created Sun Dec  5 02:13:09 2021
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   0.98y
# First observation: 2015/03/17
#  Last observation: 2016/03/09
Preliminary a, adot, b, bdot, g, gdot:
  -0.000028   0.012262   0.000003  -0.004112   0.017187   0.000000
# Chi-squared of fit:    16.65 DOF:     10 RMS:  0.26
# Min/Max residuals:    -0.35    0.68
# Exact a, adot, b, bdot, g, gdot:
  1.011532E-05  1.231817E-02 -2.685886E-06 -4.141724E-03  1.735642E-02  6.546449E-03
# Covariance matrix:
  4.6804E-13  1.3131E-12  3.6088E-14 -5.8679E-13  1.1690E-12  1.3750E-10
  1.3131E-12  5.7402E-11  9.8662E-13 -1.8761E-11  2.5942E-11  4.3509E-09
  3.6088E-14  9.8662E-13  3.0407E-13 -6.7402E-13  4.7652E-13  7.6819E-11
 -5.8679E-13 -1.8761E-11 -6.7402E-13  7.4255E-12 -8.7580E-12 -1.4537E-09
  1.1690E-12  2.5942E-11  4.7652E-13 -8.7580E-12  1.3200E-11  2.0354E-09
  1.3750E-10  4.3509E-09  7.6819E-11 -1.4537E-09  2.0354E-09  3.3723E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   15.007910 -162.476706    0.357395    0.239717   -0.893663  2457099.027758
# Heliocentric elements and errors
Epoch:              2457090.5000  =  2015/03/09
Mean Anomaly:           58.32691 +/-     4.393
Argument of Peri:       28.91006 +/-     1.797
Long of Asc Node:       54.76727 +/-     0.025
Inclination:            23.36980 +/-     0.012
Eccentricity:         0.44875846 +/-    0.0346
Semi-Major Axis:     61.43799103 +/-    2.4372
Time of Perihelion: 2428592.1032 +/-    1315.8
Perihelion:          33.86717267 +/-    2.5134
Aphelion:            89.00880938 +/-    4.1206
Period (y)              481.5748 +/-     28.66
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -54.06074339 +/-    0.0111
Ecliptic Y          -16.69385192 +/-    0.0035
Ecliptic Z           14.91955969 +/-    0.0031
Ecliptic XDOT        -0.00053085 +/-    0.0001
Ecliptic YDOT        -0.00220996 +/-    0.0000
Ecliptic ZDOT        -0.00036354 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   58.51360465 +/-    0.0103
Geocenter to KBO     57.61556723 +/-    0.0121
# Hcoef:  7.52

The following table shows the complete astrometric record for 15FU403. 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 (15FU403) followed by the observatory code and reference code for the source of the astrometry.

2015 03  17.52698  13 27 30.391  +07 00 06.65  25.0r 15FU403   568  C~2Zrj      
2015 03  17.58309  13 27 30.211  +07 00 08.11        15FU403   568  C~2Zrj      
2015 03  17.64176  13 27 30.024  +07 00 09.29        15FU403   568  C~2Zrj      
2015 04  18.19873  13 25 44.620  +07 10 37.28  25.2r 15FU403   304  C~2Zrj      
2015 04  19.17644  13 25 41.275  +07 10 52.85        15FU403   304  C~2Zrj      
2015 06  21.30254  13 23 00.313  +07 13 37.96        15FU403   568  C~2Zrj      
2016 03  08.34046  13 30 09.612  +06 27 42.23        15FU403   304  C~2Zrj      
2016 03  09.33341  13 30 06.944  +06 28 04.37        15FU403   304  C~2Zrj      

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     0.23       0.00    -0.22
     2   0.0002     -3.03     0.07       0.33    -0.09
     3   0.0003     -6.06     0.04       0.35    -0.25
     4   0.0867  -1695.98    -0.35     -18.14    -0.12
     5   0.0894  -1747.94    -0.10     -22.72     0.19
     6   0.2622  -4026.37     0.11    -781.81     0.68
     7   0.9769   2935.72    -0.26    -888.43     0.04
     8   0.9796   2890.50     0.27    -883.23    -0.23

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.

15FU403    quality flag:1

Type:       SCATNEAR  CENTAURS    5:2EEE

axisobj        60.778    69.478    55.350
ecceobj         0.449     0.547     0.356
incobj         23.429    23.392    23.466
qmin           32.063    29.681    35.499
qmax           92.046   117.014    76.389
amean          61.135    69.736    55.462
amin           59.881    68.094    54.771
amax           62.811    74.550    56.355
emean           0.454     0.548     0.301
emin            0.429     0.530     0.244
emax            0.475     0.582     0.360
imean          21.756    22.024    24.705
imin           20.683    19.661    22.428
imax           23.178    22.918    26.548
excite_mean     0.587     0.664     0.516
fracstop        1.000     1.000     1.000
cjmean          2.850     2.792     2.893

libcent 0      -180.0    -180.0     180.8
libamp  0      -180.0    -180.0     140.3
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       172.1     151.0      84.9
kozaiamp        179.9     179.9      63.7