Orbit Fit and Astrometric record for 17EO53

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: 17EO53    
# Created Tue Apr  1 01:11:06 2025
# Orbit generated from Bernstein formalism
# Fitting     13 observations of     13
# Arc:  70.95d
# First observation: 2016/12/25
#  Last observation: 2017/03/06
Preliminary a, adot, b, bdot, g, gdot:
   0.000001   0.031077   0.000000   0.012562   0.028499   0.000000
# Chi-squared of fit:     6.01 DOF:     20 RMS:  0.12
# Min/Max residuals:    -0.23    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.716536E-05  3.009350E-02  5.812605E-06  1.238300E-02  2.808179E-02 -2.510348E-04
# Covariance matrix:
  2.9451E-13  3.4683E-12  1.3596E-14  7.4277E-13  1.7484E-12  1.9805E-10
  3.4683E-12  1.1266E-08  2.4269E-11  1.0126E-09  2.4729E-09  1.1223E-07
  1.3596E-14  2.4269E-11  2.9500E-13  6.9564E-13  5.3730E-12  2.5067E-10
  7.4277E-13  1.0126E-09  6.9564E-13  1.1024E-10  2.2650E-10  1.0982E-08
  1.7484E-12  2.4729E-09  5.3730E-12  2.2650E-10  5.5225E-10  2.6623E-08
  1.9805E-10  1.1223E-07  2.5067E-10  1.0982E-08  2.6623E-08  1.5618E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
  -11.711550  148.664684    0.808861   -0.114695   -0.554257  2457747.961099
# Heliocentric elements and errors
Epoch:              2457740.5000  =  2016/12/18
Mean Anomaly:          354.74479 +/-     6.948
Argument of Peri:      340.18688 +/-    11.637
Long of Asc Node:      173.60481 +/-     0.087
Inclination:            24.76195 +/-     0.069
Eccentricity:         0.23510456 +/-    0.0032
Semi-Major Axis:     47.19022470 +/-    0.2094
Time of Perihelion: 2459468.9791 +/-    2285.2
Perihelion:          36.09558747 +/-    0.2199
Aphelion:            58.28486194 +/-    0.2994
Period (y)              324.1800 +/-      2.16
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.84944689 +/-    0.0249
Ecliptic Y           19.11426940 +/-    0.0152
Ecliptic Z           -7.22817798 +/-    0.0061
Ecliptic XDOT        -0.00171209 +/-    0.0001
Ecliptic YDOT        -0.00239776 +/-    0.0001
Ecliptic ZDOT         0.00118707 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.17445689 +/-    0.0221
Geocenter to KBO     35.61026762 +/-    0.0298
# Hcoef:  9.43

The following table shows the complete astrometric record for 17EO53. 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 (17EO53) followed by the observatory code and reference code for the source of the astrometry.

2016 12  25.46031  09 47 04.57   +00 56 06.6   25.2r 17EO53    T09  C~83F6      
2016 12  25.46657  09 47 04.56   +00 56 06.4   25.1r 17EO53    T09  C~83F6      
2016 12  25.47284  09 47 04.53   +00 56 06.4   25.2r 17EO53    T09  C~83F6      
2016 12  25.48541  09 47 04.50   +00 56 06.4   25.6r 17EO53    T09  C~83F6      
2016 12  25.49797  09 47 04.44   +00 56 06.4   25.1r 17EO53    T09  C~83F6      
2017 01  26.46395  09 44 56.63   +01 04 24.1   24.7z 17EO53    T09  C~83F6      
2017 01  26.48003  09 44 56.57   +01 04 24.6   25.2z 17EO53    T09  C~83F6      
2017 01  26.49611  09 44 56.47   +01 04 25.1   24.1z 17EO53    T09  C~83F6      
2017 01  26.51220  09 44 56.38   +01 04 25.4   24.9z 17EO53    T09  C~83F6      
2017 03  06.36563  09 41 40.15   +01 26 12.8   24.6i 17EO53    T09  C~83F6      
2017 03  06.38040  09 41 40.07   +01 26 13.4   24.7i 17EO53    T09  C~83F6      
2017 03  06.39443  09 41 39.99   +01 26 14.0   24.4i 17EO53    T09  C~83F6      
2017 03  06.40818  09 41 39.94   +01 26 14.5   24.6i 17EO53    T09  C~83F6      

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    -0.05       0.00     0.24
     2   0.0000     -0.07     0.15      -0.24     0.06
     3   0.0000     -0.50    -0.01      -0.39    -0.03
     4   0.0001     -0.92     0.11      -0.54    -0.05
     5   0.0001     -1.77    -0.20      -0.85    -0.23
     6   0.0876  -1973.76    -0.01    -183.96    -0.09
     7   0.0877  -1974.77     0.24    -183.80     0.09
     8   0.0877  -1976.35    -0.07    -183.84     0.08
     9   0.0878  -1977.73    -0.17    -184.02    -0.08
    10   0.1941  -5190.58     0.14      46.69     0.01
    11   0.1942  -5191.91     0.01      46.85    -0.01
    12   0.1942  -5193.25    -0.19      47.01    -0.03
    13   0.1942  -5194.12     0.04      47.23     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.

17EO53    quality flag:2

Type:       SCATNEAR  SCATNEAR  SCATEXTD

axisobj        47.051    49.615    45.930
ecceobj         0.231     0.285     0.225
incobj         24.831    24.616    25.048
qmin           34.849    34.443    33.862
qmax           59.751    65.103    58.437
amean          46.976    49.459    45.875
amin           46.560    48.970    45.466
amax           47.510    50.044    46.364
emean           0.238     0.282     0.239
emin            0.221     0.264     0.218
emax            0.258     0.301     0.260
imean          24.089    24.118    24.135
imin           23.525    23.443    23.412
imax           24.621    24.682    24.836
excite_mean     0.473     0.496     0.474
fracstop        1.000     1.000     1.000
cjmean          2.856     2.853     2.845

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       170.7     173.5     177.3
kozaiamp        179.9     180.0     179.9