Orbit Fit and Astrometric record for 19ES7

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: 19ES7     
# Created Tue Apr  1 01:11:12 2025
# Orbit generated from Bernstein formalism
# Fitting     19 observations of     19
# Arc:   0.97y
# First observation: 2018/03/18
#  Last observation: 2019/03/08
Preliminary a, adot, b, bdot, g, gdot:
  -0.000050   0.024377  -0.000001  -0.000349   0.024335   0.000000
# Chi-squared of fit:     8.04 DOF:     32 RMS:  0.11
# Min/Max residuals:    -0.22    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.571774E-05  2.426345E-02 -4.278553E-07 -3.493997E-04  2.459533E-02 -9.579666E-04
# Covariance matrix:
  4.8623E-13  1.5927E-12  5.4588E-15 -3.4731E-14  1.3421E-12  8.3319E-11
  1.5927E-12  3.2684E-11  6.0560E-14 -5.2577E-13  1.4900E-11  1.2789E-09
  5.4588E-15  6.0560E-14  2.6932E-13 -2.9053E-13  3.6460E-14  2.5574E-12
 -3.4731E-14 -5.2577E-13 -2.9053E-13  4.4583E-13 -2.6075E-13 -2.1178E-11
  1.3421E-12  1.4900E-11  3.6460E-14 -2.6075E-13  8.9660E-12  6.2913E-10
  8.3319E-11  1.2789E-09  2.5574E-12 -2.1178E-11  6.2913E-10  5.1420E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.539172  174.797884   -0.041493    0.044101   -0.992506  2458195.977535
# Heliocentric elements and errors
Epoch:              2458190.5000  =  2018/03/13
Mean Anomaly:          310.31262 +/-     5.304
Argument of Peri:      162.78982 +/-     6.332
Long of Asc Node:       66.42522 +/-     0.034
Inclination:             2.61255 +/-     0.001
Eccentricity:         0.05161608 +/-    0.0078
Semi-Major Axis:     43.01851199 +/-    0.0364
Time of Perihelion: 2472414.6089 +/-    1518.3
Perihelion:          40.79806516 +/-    0.3353
Aphelion:            45.23895883 +/-    0.3357
Period (y)              282.1573 +/-      0.36
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.44544971 +/-    0.0049
Ecliptic Y            3.72445412 +/-    0.0005
Ecliptic Z            1.80125675 +/-    0.0002
Ecliptic XDOT        -0.00013415 +/-    0.0000
Ecliptic YDOT        -0.00270377 +/-    0.0000
Ecliptic ZDOT        -0.00004373 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.65142718 +/-    0.0049
Geocenter to KBO     40.65812497 +/-    0.0049
# Hcoef:  7.83

The following table shows the complete astrometric record for 19ES7. 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 (19ES7) followed by the observatory code and reference code for the source of the astrometry.

2018 03  18.476734 11 44 56.23   +04 23 51.4         19ES7     T09  C~870X      
2018 03  18.578695 11 44 55.76   +04 23 54.3         19ES7     T09  C~870X      
2018 03  18.605413 11 44 55.64   +04 23 55.0         19ES7     T09  C~870X      
2018 04  12.106153 11 43 09.302  +04 34 53.04  23.9V 19ES7     W84  C~8HR7      
2018 04  24.412196 11 42 23.99   +04 39 15.7         19ES7     T09  C~870X      
2018 04  24.496049 11 42 23.70   +04 39 17.2         19ES7     T09  C~870X      
2019 02  02.656217 11 52 58.44   +03 29 25.6         19ES7     T09  C~870X      
2019 02  04.599415 11 52 52.57   +03 30 09.1         19ES7     T09  C~870X      
2019 02  04.633119 11 52 52.46   +03 30 09.8         19ES7     T09  C~870X      
2019 03  02.43427  11 51 14.64   +03 41 31.0   22.6y 19ES7     T09  C~83GA      
2019 03  02.53504  11 51 14.19   +03 41 34.1   23.3y 19ES7     T09  C~83GA      
2019 03  02.57532  11 51 14.01   +03 41 35.7   23.4y 19ES7     T09  C~83GA      
2019 03  07.58077  11 50 52.04   +03 44 01.7   23.3y 19ES7     T09  C~83GA      
2019 03  07.61821  11 50 51.87   +03 44 02.7   23.0y 19ES7     T09  C~83GA      
2019 03  07.62089  11 50 51.84   +03 44 02.9   23.2y 19ES7     T09  C~83GA      
2019 03  08.35114  11 50 48.61   +03 44 24.6   25.1r 19ES7     T09  C~83GA      
2019 03  08.37278  11 50 48.52   +03 44 25.1   24.2r 19ES7     T09  C~83GA      
2019 03  08.40431  11 50 48.37   +03 44 25.9   25.3r 19ES7     T09  C~83GA      
2019 03  08.41479  11 50 48.33   +03 44 26.2   24.7r 19ES7     T09  C~83GA      

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     0.04
     2   0.0003     -7.60     0.01      -0.13    -0.01
     3   0.0004     -9.53     0.07      -0.20    -0.06
     4   0.0674  -1730.30    -0.17     -27.60    -0.00
     5   0.1011  -2456.46     0.07     -55.19     0.06
     6   0.1014  -2461.04     0.05     -55.53    -0.03
     7   0.8793   7923.54    -0.10    -120.16    -0.13
     8   0.8847   7825.45     0.02    -115.39     0.09
     9   0.8848   7823.66     0.01    -115.41     0.02
    10   0.9554   6207.18     0.28     -75.56    -0.21
    11   0.9557   6199.76     0.13     -75.41    -0.08
    12   0.9558   6196.65    -0.08     -75.01     0.30
    13   0.9695   5836.54     0.12     -72.37     0.04
    14   0.9696   5833.81     0.14     -72.46    -0.06
    15   0.9696   5833.32    -0.15     -72.46    -0.05
    16   0.9716   5780.29    -0.22     -71.85     0.15
    17   0.9717   5778.85    -0.06     -71.93     0.07
    18   0.9717   5776.47    -0.10     -72.09    -0.09
    19   0.9718   5775.80     0.00     -72.06    -0.05

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.

19ES7    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.726    42.766    42.693
ecceobj         0.044     0.062     0.043
incobj          2.613     2.614     2.613
qmin           40.278    39.664    40.320
qmax           45.622    46.389    45.591
amean          42.877    42.923    42.844
amin           42.544    42.594    42.519
amax           43.212    43.269    43.188
emean           0.036     0.052     0.035
emin            0.016     0.030     0.015
emax            0.056     0.072     0.056
imean           1.069     1.092     1.077
imin            0.211     0.305     0.237
imax            1.770     1.771     1.770
excite_mean     0.041     0.056     0.040
fracstop        1.000     1.000     1.000
cjmean          3.086     3.085     3.086

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       194.7     193.3     195.5
kozaiamp        179.9     180.0     179.9