Orbit Fit and Astrometric record for 19QF110

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: 19QF110   
# Created Tue Apr  1 01:11:14 2025
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   1.15y
# First observation: 2019/08/28
#  Last observation: 2020/10/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.000000   0.023060  -0.000000   0.001129   0.023886   0.000000
# Chi-squared of fit:     7.04 DOF:     10 RMS:  0.17
# Min/Max residuals:    -0.37    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.494201E-05  2.307995E-02  4.511106E-07  1.133662E-03  2.388560E-02  5.359189E-04
# Covariance matrix:
  7.4023E-13  1.0877E-12 -4.0645E-15  1.0518E-13  1.6935E-12  7.8665E-11
  1.0877E-12  8.6107E-11 -5.1314E-13  1.3380E-11  3.6646E-11  1.0071E-08
 -4.0645E-15 -5.1314E-13  3.9958E-13 -4.4088E-13 -2.0441E-13 -6.1770E-11
  1.0518E-13  1.3380E-11 -4.4088E-13  2.7467E-12  5.3272E-12  1.6108E-09
  1.6935E-12  3.6646E-11 -2.0441E-13  5.3272E-12  1.9315E-11  4.0082E-09
  7.8665E-11  1.0071E-08 -6.1770E-11  1.6108E-09  4.0082E-09  1.2127E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.104522   -8.401907    0.292308    0.001757   -0.961150  2458723.711696
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:           46.63642 +/-    62.956
Argument of Peri:      313.21551 +/-    68.238
Long of Asc Node:      349.11376 +/-     0.002
Inclination:             2.80714 +/-     0.003
Eccentricity:         0.02610259 +/-    0.0372
Semi-Major Axis:     43.59733286 +/-    0.1227
Time of Perihelion: 2445099.4370 +/-   18387.3
Perihelion:          42.45932961 +/-    1.6243
Aphelion:            44.73533611 +/-    1.6248
Period (y)              287.8711 +/-      1.22
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.32778736 +/-    0.0076
Ecliptic Y           -6.55390788 +/-    0.0011
Ecliptic Z            0.07639593 +/-    0.0000
Ecliptic XDOT         0.00045555 +/-    0.0001
Ecliptic YDOT         0.00260873 +/-    0.0000
Ecliptic ZDOT         0.00012983 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.83224402 +/-    0.0075
Geocenter to KBO     41.86623396 +/-    0.0077
# Hcoef:  9.24

The following table shows the complete astrometric record for 19QF110. 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 (19QF110) followed by the observatory code and reference code for the source of the astrometry.

2019 08  28.210895 23 28 57.939  -03 14 09.38  25.4r 19QF110   W84  C~7XLh      
2019 08  28.388381 23 28 57.182  -03 14 14.09  25.4r 19QF110   W84  C~7XLh      
2019 09  29.013696 23 26 40.466  -03 28 29.09  25.5r 19QF110   W84  C~7XLh      
2019 09  29.177510 23 26 39.778  -03 28 33.75  25.5r 19QF110   W84  C~7XLh      
2020 10  17.010669 23 30 12.638  -03 01 22.18  25.6r 19QF110   W84  C~7XLh      
2020 10  17.174574 23 30 12.062  -03 01 25.95  25.6r 19QF110   W84  C~7XLh      
2020 10  21.004397 23 29 58.736  -03 02 49.95  25.4r 19QF110   W84  C~7XLh      
2020 10  21.174149 23 29 58.134  -03 02 52.84  25.4r 19QF110   W84  C~7XLh      

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     0.07       0.00     0.06
     2   0.0005    -12.28    -0.07       0.14     0.00
     3   0.0871  -2230.86    -0.04      20.59     0.16
     4   0.0875  -2242.16     0.04      20.36    -0.23
     5   1.1384   1330.69    -0.14     263.94     0.10
     6   1.1388   1321.27     0.15     263.87    -0.11
     7   1.1493   1104.71    -0.02     265.40    -0.37
     8   1.1498   1095.28     0.02     266.30     0.38

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.

19QF110    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.641    45.001    43.445
ecceobj         0.025     0.143     0.045
incobj          2.810     2.816     2.808
qmin           41.873    37.870    40.182
qmax           45.329    52.053    46.682
amean          43.529    44.895    43.324
amin           43.199    44.514    42.987
amax           43.866    45.304    43.672
emean           0.018     0.136     0.052
emin            0.001     0.122     0.033
emax            0.034     0.151     0.069
imean           3.518     3.728     3.358
imin            2.772     2.923     2.450
imax            4.194     4.452     4.229
excite_mean     0.064     0.151     0.079
fracstop        1.000     1.000     1.000
cjmean          3.091     3.084     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       178.5     179.3     179.7
kozaiamp        179.9     179.9     180.0