Orbit Fit and Astrometric record for 16EO398

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: 16EO398   
# Created Tue Apr  1 01:10:45 2025
# Orbit generated from Bernstein formalism
# Fitting     17 observations of     17
# Arc:  52.01d
# First observation: 2016/01/15
#  Last observation: 2016/03/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000008   0.027497  -0.000001  -0.011964   0.026462   0.000000
# Chi-squared of fit:     5.62 DOF:     28 RMS:  0.10
# Min/Max residuals:    -0.18    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.636096E-05  2.700748E-02 -7.238704E-06 -1.197048E-02  2.639063E-02  6.025858E-03
# Covariance matrix:
  2.4873E-13  9.7345E-12  2.3322E-14 -3.1706E-13  2.5458E-12  2.2303E-10
  9.7345E-12  3.2697E-08  4.3185E-11  1.6466E-10  5.2769E-09 -9.0100E-09
  2.3322E-14  4.3185E-11  2.4454E-13 -1.6215E-12  7.0713E-12  1.9457E-11
 -3.1706E-13  1.6466E-10 -1.6215E-12  3.5162E-11  2.2197E-11 -1.5001E-09
  2.5458E-12  5.2769E-09  7.0713E-12  2.2197E-11  8.6048E-10  1.1988E-09
  2.2303E-10 -9.0100E-09  1.9457E-11 -1.5001E-09  1.1988E-09  8.7962E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
  -12.288461  140.672804    0.438268   -0.187199   -0.860314  2457402.903079
# Heliocentric elements and errors
Epoch:              2457400.5000  =  2016/01/13
Mean Anomaly:           21.81170 +/-     2.017
Argument of Peri:      163.23839 +/-     4.926
Long of Asc Node:      294.97738 +/-     0.148
Inclination:            26.68711 +/-     0.127
Eccentricity:         0.33660728 +/-    0.0284
Semi-Major Axis:     54.22836581 +/-    1.3130
Time of Perihelion: 2448563.0860 +/-     751.5
Perihelion:          35.97470317 +/-    1.7705
Aphelion:            72.48202844 +/-    2.3358
Period (y)              399.3447 +/-     14.50
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.04698260 +/-    0.0318
Ecliptic Y           24.35891336 +/-    0.0261
Ecliptic Z           -8.06504221 +/-    0.0090
Ecliptic XDOT        -0.00204441 +/-    0.0001
Ecliptic YDOT        -0.00195467 +/-    0.0001
Ecliptic ZDOT        -0.00134643 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.75730594 +/-    0.0290
Geocenter to KBO     37.89223820 +/-    0.0421
# Hcoef:  7.54

The following table shows the complete astrometric record for 16EO398. 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 (16EO398) followed by the observatory code and reference code for the source of the astrometry.

2016 01  15.40229  09 16 43.96   +02 55 33.1   22.7z 16EO398   T09  C~8eUr      
2016 01  15.41648  09 16 43.89   +02 55 33.2   22.9z 16EO398   T09  C~8eUr      
2016 01  15.44640  09 16 43.75   +02 55 33.6   23.0z 16EO398   T09  C~8eUr      
2016 01  15.45754  09 16 43.70   +02 55 33.4   22.9z 16EO398   T09  C~8eUr      
2016 01  15.47139  09 16 43.63   +02 55 33.4   22.8z 16EO398   T09  C~8eUr      
2016 01  16.215706 09 16 40.063  +02 55 38.75  23.7r 16EO398   W84  C~8idz      
2016 02  03.47801  09 15 07.57   +02 59 06.9   23.1y 16EO398   T09  C~8eUr      
2016 02  03.52502  09 15 07.32   +02 59 07.6   23.0y 16EO398   T09  C~8eUr      
2016 02  03.54690  09 15 07.21   +02 59 07.9   23.5y 16EO398   T09  C~8eUr      
2016 02  03.56853  09 15 07.09   +02 59 08.4   23.7y 16EO398   T09  C~8eUr      
2016 02  08.41135  09 14 41.79   +03 00 27.7   23.4r 16EO398   T09  C~8eUr      
2016 02  08.46194  09 14 41.52   +03 00 28.7   23.5r 16EO398   T09  C~8eUr      
2016 02  08.48123  09 14 41.42   +03 00 29.0   23.6r 16EO398   T09  C~8eUr      
2016 03  01.238569 09 12 52.361  +03 07 51.02  21.8z 16EO398   W84  C~8idz      
2016 03  07.36412  09 12 24.73   +03 10 10.3   24.6g 16EO398   T09  C~8eUr      
2016 03  07.39560  09 12 24.58   +03 10 11.0   24.3g 16EO398   T09  C~8eUr      
2016 03  07.41288  09 12 24.50   +03 10 11.5   24.3g 16EO398   T09  C~8eUr      

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    -0.04       0.00     0.01
     2   0.0000     -1.03    -0.06      -0.23     0.01
     3   0.0001     -3.15    -0.04      -0.49     0.23
     4   0.0002     -3.80     0.10      -0.91    -0.01
     5   0.0002     -4.80     0.09      -1.24    -0.11
     6   0.0022    -57.28    -0.01     -12.61    -0.03
     7   0.0522  -1439.63    -0.05    -241.22    -0.06
     8   0.0524  -1443.40    -0.05    -241.70    -0.09
     9   0.0524  -1445.06     0.05    -241.92    -0.10
    10   0.0525  -1446.93    -0.08    -242.00     0.04
    11   0.0657  -1831.95     0.02    -283.17    -0.07
    12   0.0659  -1836.10    -0.03    -283.46     0.04
    13   0.0659  -1837.62     0.02    -283.64     0.02
    14   0.1255  -3528.23     0.30    -365.29     0.26
    15   0.1423  -3964.99     0.04    -359.88    -0.03
    16   0.1423  -3967.35    -0.10    -359.91    -0.10
    17   0.1424  -3968.64    -0.18    -359.80    -0.02

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.

16EO398    quality flag:1

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        54.088    59.340    50.504
ecceobj         0.337     0.424     0.265
incobj         26.700    26.560    26.982
qmin           33.967    32.096    35.348
qmax           74.893    87.141    66.058
amean          53.977    59.081    50.397
amin           53.342    58.274    49.885
amax           54.767    60.195    51.034
emean           0.342     0.426     0.273
emin            0.320     0.403     0.249
emax            0.370     0.454     0.295
imean          27.909    27.829    28.313
imin           27.039    26.456    27.638
imax           28.688    28.978    29.013
excite_mean     0.580     0.632     0.547
fracstop        1.000     1.000     1.000
cjmean          2.781     2.749     2.789

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       191.4     201.0     178.6
kozaiamp        180.0     180.0     180.0