Orbit Fit and Astrometric record for 19QO111

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: 19QO111   
# Created Tue Apr  1 01:11:15 2025
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   2.10y
# First observation: 2019/08/30
#  Last observation: 2021/10/06
Preliminary a, adot, b, bdot, g, gdot:
   0.000016   0.024096   0.000000   0.007784   0.023905   0.000000
# Chi-squared of fit:     0.25 DOF:     10 RMS:  0.03
# Min/Max residuals:    -0.06    0.06
# Exact a, adot, b, bdot, g, gdot:
  1.591915E-05  2.407912E-02  5.076369E-06  7.781812E-03  2.383233E-02  1.257262E-04
# Covariance matrix:
  7.3743E-13  1.8155E-12 -2.7136E-14  7.3830E-13  1.8701E-12  4.5086E-11
  1.8155E-12  2.1991E-11 -3.0785E-13  8.3036E-12  1.2444E-11  5.0700E-10
 -2.7136E-14 -3.0785E-13  3.8564E-13 -3.0531E-13 -1.7081E-13 -7.1653E-12
  7.3830E-13  8.3036E-12 -3.0531E-13  3.3431E-12  4.6341E-12  1.9321E-10
  1.8701E-12  1.2444E-11 -1.7081E-13  4.6341E-12  1.0171E-11  2.8298E-10
  4.5086E-11  5.0700E-10 -7.1653E-12  1.9321E-10  2.8298E-10  1.1797E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.989040   -7.421221    0.276023   -0.050349   -0.964359  2458725.713221
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:            0.35236 +/-     0.812
Argument of Peri:      349.96969 +/-     1.325
Long of Asc Node:        1.17657 +/-     0.000
Inclination:            18.11238 +/-     0.001
Eccentricity:         0.22749844 +/-    0.0003
Semi-Major Axis:     55.57063087 +/-    0.0244
Time of Perihelion: 2458572.4014 +/-     341.3
Perihelion:          42.92839908 +/-    0.0266
Aphelion:            68.21286267 +/-    0.0353
Period (y)              414.2630 +/-      0.27
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.47649727 +/-    0.0056
Ecliptic Y           -5.81765499 +/-    0.0007
Ecliptic Z           -2.18777898 +/-    0.0003
Ecliptic XDOT         0.00042628 +/-    0.0000
Ecliptic YDOT         0.00273573 +/-    0.0000
Ecliptic ZDOT         0.00089178 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.92882839 +/-    0.0055
Geocenter to KBO     41.95980322 +/-    0.0056
# Hcoef:  7.36

The following table shows the complete astrometric record for 19QO111. 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 (19QO111) followed by the observatory code and reference code for the source of the astrometry.

2019 08  30.212420 23 37 29.067  -05 41 24.85  23.5r 19QO111   W84  C~7XLj      
2019 08  30.387214 23 37 28.317  -05 41 28.99  23.5r 19QO111   W84  C~7XLj      
2019 09  28.012277 23 35 22.497  -05 52 44.81  23.6r 19QO111   W84  C~7XLj      
2019 09  28.177548 23 35 21.756  -05 52 48.48  23.6r 19QO111   W84  C~7XLj      
2021 09  09.073508 23 45 30.104  -03 50 25.94  23.5r 19QO111   W84  C~7XLj      
2021 09  09.192572 23 45 29.570  -03 50 28.79  23.5r 19QO111   W84  C~7XLj      
2021 10  06.002765 23 43 31.988  -04 00 52.57  23.7r 19QO111   W84  C~7XLj      
2021 10  06.167954 23 43 31.280  -04 00 56.14  23.7r 19QO111   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     0.01       0.00     0.02
     2   0.0005    -11.92    -0.01       0.64     0.01
     3   0.0788  -2003.80     0.06     123.57    -0.04
     4   0.0793  -2015.40    -0.06     124.57     0.01
     5   2.0284   9252.84     0.04    3251.32    -0.03
     6   2.0287   9244.35    -0.04    3251.89     0.01
     7   2.1021   7378.74     0.02    3381.03     0.02
     8   2.1025   7367.59    -0.02    3381.98    -0.01

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.

19QO111    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        55.672    55.810    55.552
ecceobj         0.230     0.232     0.228
incobj         18.082    18.082    18.082
qmin           40.895    41.489    41.742
qmax           70.914    70.459    69.426
amean          55.445    55.629    55.244
amin           54.754    55.055    54.706
amax           56.286    56.289    55.875
emean           0.238     0.234     0.227
emin            0.216     0.219     0.213
emax            0.262     0.253     0.243
imean          18.125    18.324    18.332
imin           17.489    17.848    17.928
imax           18.712    18.743    18.702
excite_mean     0.392     0.392     0.388
fracstop        1.000     1.000     1.000
cjmean          3.048     3.049     3.049

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       181.4     165.6     174.6
kozaiamp        180.0     180.0     179.9