Orbit Fit and Astrometric record for 17ED52

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: 17ED52    
# Created Wed Dec 25 02:10:55 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     24 observations of     24
# Arc:   6.27y
# First observation: 2016/01/15
#  Last observation: 2022/04/23
# Chi-squared of fit:    10.12 DOF:     42 RMS:  0.11
# Min/Max residuals:    -0.20    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.932101E-05  3.163474E-02  5.155859E-06  7.774066E-03  2.570415E-02  4.726946E-03
# Covariance matrix:
  6.0820E-13 -6.0928E-13  1.4872E-13 -1.7911E-13 -2.3052E-15 -3.2421E-12
 -6.0928E-13  7.8408E-13 -1.8579E-13  2.2252E-13  1.9838E-13  4.1913E-12
  1.4872E-13 -1.8579E-13  1.9081E-13 -1.2178E-13 -2.4721E-14 -1.0824E-12
 -1.7911E-13  2.2252E-13 -1.2178E-13  1.2036E-13  2.7222E-14  1.2984E-12
 -2.3052E-15  1.9838E-13 -2.4721E-14  2.7222E-14  4.0563E-13  8.3137E-13
 -3.2421E-12  4.1913E-12 -1.0824E-12  1.2984E-12  8.3137E-13  2.4184E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -19.114674  133.068097    0.316566   -0.304736   -0.879876  2457402.982377
# Heliocentric elements and errors
Epoch:              2457402.5000  =  2016/01/15
Mean Anomaly:            3.00894 +/-     0.003
Argument of Peri:      285.00995 +/-     0.018
Long of Asc Node:      185.66001 +/-     0.001
Inclination:            22.91981 +/-     0.000
Eccentricity:         0.66474985 +/-    0.0002
Semi-Major Axis:    115.91046051 +/-    0.0583
Time of Perihelion: 2453592.7740 +/-       5.2
Perihelion:          38.85899955 +/-    0.0283
Aphelion:           192.96192147 +/-    0.0993
Period (y)             1247.9355 +/-      0.94
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -25.51060598 +/-    0.0006
Ecliptic Y           27.74864149 +/-    0.0007
Ecliptic Z          -12.73941101 +/-    0.0003
Ecliptic XDOT        -0.00297231 +/-    0.0000
Ecliptic YDOT        -0.00176226 +/-    0.0000
Ecliptic ZDOT         0.00061754 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.78771394 +/-    0.0006
Geocenter to KBO     38.90414319 +/-    0.0010
# Hcoef:  7.91

The following table shows the complete astrometric record for 17ED52. 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 (17ED52) followed by the observatory code and reference code for the source of the astrometry.

2016 01  15.481588 08 40 47.56   -01 28 56.1         17ED52    T09  C~81Bz      
2016 01  15.569219 08 40 47.15   -01 28 54.9         17ED52    T09  C~81Bz      
2017 01  23.31100  08 47 34.28   -01 30 28.3   24.4r 17ED52    T09  C~7xU8      
2017 01  23.31379  08 47 34.28   -01 30 28.4   24.7r 17ED52    T09  C~7xU8      
2017 01  23.33550  08 47 34.16   -01 30 27.9   24.6r 17ED52    T09  C~7xU8      
2017 01  23.34393  08 47 34.13   -01 30 27.6   24.4r 17ED52    T09  C~7xU8      
2017 01  28.33957  08 47 10.64   -01 28 46.5   24.4g 17ED52    T09  C~7xU8      
2017 01  28.34235  08 47 10.63   -01 28 46.3   24.5g 17ED52    T09  C~7xU8      
2017 01  28.37257  08 47 10.48   -01 28 46.0   24.7g 17ED52    T09  C~7xU8      
2017 01  30.30349  08 47 01.37   -01 28 03.0   23.3y 17ED52    T09  C~7xU8      
2017 01  30.31150  08 47 01.35   -01 28 02.5   22.8y 17ED52    T09  C~7xU8      
2017 01  30.34356  08 47 01.19   -01 28 01.8   23.4y 17ED52    T09  C~7xU8      
2017 03  06.23483  08 44 31.08   -01 10 32.5   23.8i 17ED52    T09  C~7xU8      
2017 03  06.24723  08 44 31.04   -01 10 31.8   22.9i 17ED52    T09  C~7xU8      
2017 03  06.26785  08 44 30.96   -01 10 31.1   23.9i 17ED52    T09  C~7xU8      
2017 03  06.28141  08 44 30.91   -01 10 30.8   23.5i 17ED52    T09  C~7xU8      
2017 03  06.28412  08 44 30.91   -01 10 30.6   23.6i 17ED52    T09  C~7xU8      
2017 03  06.30857  08 44 30.81   -01 10 29.8   23.5i 17ED52    T09  C~7xU8      
2017 03  06.32245  08 44 30.78   -01 10 29.1   23.4i 17ED52    T09  C~7xU8      
2017 03  06.33361  08 44 30.72   -01 10 28.9   23.4i 17ED52    T09  C~7xU8      
2017 03  06.33932  08 44 30.70   -01 10 28.8   23.5i 17ED52    T09  C~7xU8      
2017 03  06.34763  08 44 30.67   -01 10 28.4   23.7i 17ED52    T09  C~7xU8      
2018 11  05.291226 09 05 09.35   -01 29 30.6         17ED52    W84  C~81Bz      
2022 04  23.153698 09 18 39.91   -01 01 15.7         17ED52    W84  C~81Bz      

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     0.01       0.00    -0.08
     2   0.0002      0.00    -0.00       0.00    -0.10
     3   1.0235      0.00    -0.06       0.00     0.20
     4   1.0235      0.00     0.14       0.00     0.05
     5   1.0236      0.00    -0.12       0.00     0.14
     6   1.0236      0.00     0.04       0.00     0.28
     7   1.0373      0.00     0.02       0.00     0.02
     8   1.0373      0.00     0.06       0.00     0.16
     9   1.0373      0.00    -0.01       0.00    -0.20
    10   1.0426      0.00    -0.13       0.00    -0.12
    11   1.0427      0.00     0.14       0.00     0.20
    12   1.0427      0.00     0.04       0.00     0.17
    13   1.1383      0.00    -0.04       0.00    -0.20
    14   1.1383      0.00     0.03       0.00     0.06
    15   1.1384      0.00    -0.06       0.00     0.03
    16   1.1384      0.00    -0.07       0.00    -0.14
    17   1.1384      0.00     0.08       0.00    -0.04
    18   1.1385      0.00    -0.10       0.00    -0.10
    19   1.1385      0.00     0.20       0.00     0.11
    20   1.1385      0.00    -0.09       0.00    -0.09
    21   1.1386      0.00    -0.08       0.00    -0.19
    22   1.1386      0.00    -0.08       0.00    -0.08
    23   2.8058      0.00     0.04       0.00     0.01
    24   6.2688      0.00     0.00       0.00    -0.03

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.

17ED52    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       115.749   115.749   115.750
ecceobj         0.664     0.664     0.664
incobj         22.947    22.947    22.947
qmin           37.753    37.753    37.753
qmax          195.946   195.932   196.204
amean         114.022   114.012   113.797
amin          111.715   111.776   111.410
amax          117.538   117.568   117.653
emean           0.653     0.652     0.652
emin            0.640     0.639     0.638
emax            0.669     0.669     0.669
imean          23.606    23.658    23.560
imin           22.545    22.545    22.545
imax           24.467    24.502    24.582
excite_mean     0.766     0.766     0.765
fracstop        1.000     1.000     1.000
cjmean          2.966     2.966     2.965

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       195.0     196.5     190.5
kozaiamp        180.0     180.0     180.0