Orbit Fit and Astrometric record for 17EJ53

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: 17EJ53    
# Created Thu Oct 31 01:10:35 2024
# Orbit generated from Bernstein formalism
# Fitting     14 observations of     14
# Arc:  70.96d
# First observation: 2016/12/25
#  Last observation: 2017/03/06
Preliminary a, adot, b, bdot, g, gdot:
   0.000002   0.022849   0.000004  -0.000094   0.023908   0.000000
# Chi-squared of fit:     7.36 DOF:     22 RMS:  0.13
# Min/Max residuals:    -0.27    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.491628E-05  2.207204E-02  1.352421E-07 -1.275188E-04  2.358195E-02 -1.161703E-03
# Covariance matrix:
  4.8242E-13 -3.6860E-12  2.0251E-14 -2.5538E-13  8.1442E-13  2.6894E-10
 -3.6860E-12  6.6062E-09  3.1045E-11  4.0246E-10  1.4365E-09  7.1936E-08
  2.0251E-14  3.1045E-11  4.9013E-13 -1.8819E-13  6.9968E-12  3.9477E-10
 -2.5538E-13  4.0246E-10 -1.8819E-13  4.2717E-11  8.6485E-11  4.0835E-09
  8.1442E-13  1.4365E-09  6.9968E-12  8.6485E-11  3.2276E-10  1.8022E-08
  2.6894E-10  7.1936E-08  3.9477E-10  4.0835E-09  1.8022E-08  1.3580E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
  -12.524706  149.574543    0.817663   -0.119776   -0.540085  2457747.969449
# Heliocentric elements and errors
Epoch:              2457740.5000  =  2016/12/18
Mean Anomaly:          245.26052 +/-    15.968
Argument of Peri:       30.36544 +/-    15.745
Long of Asc Node:      241.20920 +/-     0.070
Inclination:            12.37593 +/-     0.001
Eccentricity:         0.08386304 +/-    0.0450
Semi-Major Axis:     41.28014231 +/-    0.1629
Time of Perihelion: 2488616.4688 +/-    4293.0
Perihelion:          37.81826397 +/-    1.8637
Aphelion:            44.74202065 +/-    1.8661
Period (y)              265.2284 +/-      1.57
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.76211989 +/-    0.0272
Ecliptic Y           21.94449894 +/-    0.0160
Ecliptic Z           -9.19607515 +/-    0.0070
Ecliptic XDOT        -0.00117886 +/-    0.0001
Ecliptic YDOT        -0.00228467 +/-    0.0001
Ecliptic ZDOT         0.00001474 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.95413893 +/-    0.0241
Geocenter to KBO     42.40530620 +/-    0.0323
# Hcoef:  8.49

The following table shows the complete astrometric record for 17EJ53. 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 (17EJ53) followed by the observatory code and reference code for the source of the astrometry.

2016 12  25.46866  09 49 18.62   -00 07 58.2   25.3r 17EJ53    T09  C~81Bz      
2016 12  25.48124  09 49 18.58   -00 07 58.2   25.4r 17EJ53    T09  C~81Bz      
2016 12  25.50426  09 49 18.54   -00 07 58.2   25.2r 17EJ53    T09  C~81Bz      
2017 01  26.46057  09 47 24.44   -00 04 13.7   24.3z 17EJ53    T09  C~81Bz      
2017 01  26.49344  09 47 24.30   -00 04 12.8   24.4z 17EJ53    T09  C~81Bz      
2017 01  26.49611  09 47 24.30   -00 04 12.7   24.3z 17EJ53    T09  C~81Bz      
2017 01  26.50415  09 47 24.23   -00 04 12.7   24.7z 17EJ53    T09  C~81Bz      
2017 01  26.50952  09 47 24.22   -00 04 12.7   24.8z 17EJ53    T09  C~81Bz      
2017 03  06.35845  09 44 30.02   +00 10 44.2   24.5i 17EJ53    T09  C~81Bz      
2017 03  06.37480  09 44 29.95   +00 10 44.9   24.2i 17EJ53    T09  C~81Bz      
2017 03  06.38871  09 44 29.91   +00 10 45.2   24.4i 17EJ53    T09  C~81Bz      
2017 03  06.40280  09 44 29.83   +00 10 45.4   24.6i 17EJ53    T09  C~81Bz      
2017 03  06.40546  09 44 29.82   +00 10 45.7   24.7i 17EJ53    T09  C~81C0      
2017 03  06.42427  09 44 29.75   +00 10 46.2   24.1i 17EJ53    T09  C~81C0      

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    -0.02       0.00    -0.05
     2   0.0000     -0.56    -0.13      -0.21    -0.05
     3   0.0001     -1.13     0.15      -0.41     0.10
     4   0.0876  -1685.84     0.10    -376.60    -0.26
     5   0.0877  -1688.12     0.03    -376.47     0.13
     6   0.0877  -1688.15     0.18    -376.38     0.24
     7   0.0877  -1689.14    -0.27    -376.74    -0.05
     8   0.0877  -1689.28    -0.04    -376.79    -0.06
     9   0.1941  -4452.06    -0.04    -430.62    -0.13
    10   0.1941  -4453.28    -0.12    -430.33     0.09
    11   0.1942  -4453.95     0.19    -430.25     0.11
    12   0.1942  -4455.15    -0.02    -430.47    -0.18
    13   0.1942  -4455.39    -0.08    -430.24     0.04
    14   0.1943  -4456.55     0.08    -430.13     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.

17EJ53    quality flag:2

Type:         8:5EII  SCATEXTD  SCATEXTD

axisobj        41.107    41.994    40.712
ecceobj         0.082     0.064     0.097
incobj         12.360    12.359    12.362
qmin           36.901    38.215    34.682
qmax           45.691    45.980    47.071
amean          41.191    41.985    40.736
amin           40.835    41.654    40.311
amax           41.561    42.323    41.110
emean           0.076     0.068     0.108
emin            0.050     0.052     0.079
emax            0.100     0.087     0.146
imean          14.615    14.024    14.485
imin           13.447    13.315    12.877
imax           15.663    14.785    16.338
excite_mean     0.264     0.252     0.273
fracstop        1.000     1.000     1.000
cjmean          2.987     3.003     2.978

libcent 0       187.8    -180.0    -180.0
libamp  0       164.3    -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       172.9     179.6     180.5
kozaiamp        180.0     180.0     180.0