Orbit Fit and Astrometric record for 19QS111

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: 19QS111   
# Created Tue Apr  1 01:11:15 2025
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   2.10y
# First observation: 2019/08/28
#  Last observation: 2021/10/04
Preliminary a, adot, b, bdot, g, gdot:
   0.000009   0.025352   0.000000   0.000172   0.025208   0.000000
# Chi-squared of fit:     0.74 DOF:     10 RMS:  0.05
# Min/Max residuals:    -0.11    0.09
# Exact a, adot, b, bdot, g, gdot:
  1.584189E-05  2.536468E-02  1.011192E-07  1.720913E-04  2.516728E-02  1.018515E-03
# Covariance matrix:
  7.4075E-13  1.6600E-12 -5.0903E-16  1.4375E-14  1.7229E-12  3.9926E-11
  1.6600E-12  1.9792E-11 -5.9537E-15  1.5611E-13  1.0787E-11  4.3526E-10
 -5.0903E-16 -5.9537E-15  3.8279E-13 -1.8922E-13 -3.0736E-15 -1.3245E-13
  1.4375E-14  1.5611E-13 -1.8922E-13  1.8097E-13  8.4543E-14  3.4667E-12
  1.7229E-12  1.0787E-11 -3.0736E-15  8.4543E-14  8.6463E-12  2.3513E-10
  3.9926E-11  4.3526E-10 -1.3245E-13  3.4667E-12  2.3513E-10  9.6664E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.367460   -7.130992    0.313555   -0.006117   -0.954413  2458723.711696
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:           32.97348 +/-     2.519
Argument of Peri:      279.69340 +/-     2.953
Long of Asc Node:       35.65129 +/-     0.070
Inclination:             0.52380 +/-     0.001
Eccentricity:         0.06136991 +/-    0.0026
Semi-Major Axis:     42.84740609 +/-    0.0192
Time of Perihelion: 2449337.3737 +/-     716.8
Perihelion:          40.21786455 +/-    0.1111
Aphelion:            45.47694763 +/-    0.1115
Period (y)              280.4755 +/-      0.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.33690830 +/-    0.0046
Ecliptic Y           -5.36900978 +/-    0.0006
Ecliptic Z           -0.25482226 +/-    0.0000
Ecliptic XDOT         0.00046106 +/-    0.0000
Ecliptic YDOT         0.00272478 +/-    0.0000
Ecliptic ZDOT         0.00001778 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.69345613 +/-    0.0046
Geocenter to KBO     39.73412545 +/-    0.0046
# Hcoef:  8.41

The following table shows the complete astrometric record for 19QS111. 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 (19QS111) followed by the observatory code and reference code for the source of the astrometry.

2019 08  28.210895 23 34 23.410  -03 10 04.51  24.4r 19QS111   W84  C~7XLj      
2019 08  28.388381 23 34 22.637  -03 10 09.54  24.4r 19QS111   W84  C~7XLj      
2019 09  29.013696 23 32 00.375  -03 25 22.79  24.4r 19QS111   W84  C~7XLj      
2019 09  29.177510 23 31 59.632  -03 25 27.51  24.4r 19QS111   W84  C~7XLj      
2021 09  06.108763 23 44 22.093  -02 04 16.39  24.4r 19QS111   W84  C~7XLj      
2021 09  06.196686 23 44 21.687  -02 04 19.05  24.4r 19QS111   W84  C~7XLj      
2021 10  04.002582 23 42 16.401  -02 17 46.76  24.4r 19QS111   W84  C~7XLj      
2021 10  04.175328 23 42 15.634  -02 17 51.65  24.4r 19QS111   W84  C~7XLj      

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     0.00
     2   0.0005    -12.62    -0.02      -0.04    -0.11
     3   0.0871  -2330.61     0.05       2.56     0.08
     4   0.0875  -2342.70    -0.05       2.61     0.03
     5   2.0257   9808.23     0.09      70.00     0.03
     6   2.0260   9801.57    -0.09      69.97    -0.03
     7   2.1021   7753.60     0.02      74.11     0.02
     8   2.1026   7741.09    -0.02      74.18    -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.

19QS111    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.891    42.985    42.804
ecceobj         0.061     0.068     0.055
incobj          0.527     0.527     0.527
qmin           39.361    39.182    39.448
qmax           46.422    46.844    46.157
amean          42.781    42.876    42.692
amin           42.450    42.530    42.354
amax           43.143    43.237    43.043
emean           0.058     0.065     0.051
emin            0.032     0.039     0.026
emax            0.077     0.084     0.073
imean           2.166     2.190     2.128
imin            0.729     0.785     0.651
imax            2.940     2.973     2.915
excite_mean     0.070     0.075     0.063
fracstop        1.000     1.000     1.000
cjmean          3.081     3.081     3.081

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       187.3     184.2     191.0
kozaiamp        180.0     179.9     180.0