Orbit Fit and Astrometric record for 19QL110

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: 19QL110   
# Created Tue Apr  1 01:11:15 2025
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   2.11y
# First observation: 2019/08/28
#  Last observation: 2021/10/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000009   0.021308  -0.000001  -0.001457   0.022874   0.000000
# Chi-squared of fit:     1.57 DOF:     10 RMS:  0.08
# Min/Max residuals:    -0.13    0.13
# Exact a, adot, b, bdot, g, gdot:
  1.430725E-05  2.138808E-02 -1.654574E-06 -1.464171E-03  2.293678E-02  2.250499E-03
# Covariance matrix:
  7.3895E-13  5.1919E-13  4.7938E-15 -4.0497E-14  1.4831E-12  1.3388E-11
  5.1919E-13  4.0533E-12  3.7802E-14 -3.0044E-13  4.2830E-12  1.0080E-10
  4.7938E-15  3.7802E-14  3.5598E-13 -2.0915E-13  3.5992E-14  1.0586E-12
 -4.0497E-14 -3.0044E-13 -2.0915E-13  2.7294E-13 -2.9257E-13 -8.3562E-12
  1.4831E-12  4.2830E-12  3.5992E-14 -2.9257E-13  6.6346E-12  9.7617E-11
  1.3388E-11  1.0080E-10  1.0586E-12 -8.3562E-12  9.7617E-11  2.8082E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.115845   -7.924819    0.300301   -0.018666   -0.958503  2458723.711696
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:           84.79849 +/-     0.246
Argument of Peri:       99.21756 +/-     0.177
Long of Asc Node:      156.14949 +/-     0.005
Inclination:             4.07117 +/-     0.001
Eccentricity:         0.10066627 +/-    0.0024
Semi-Major Axis:     44.51631581 +/-    0.0211
Time of Perihelion: 2433166.2665 +/-      72.0
Perihelion:          40.03502413 +/-    0.1092
Aphelion:            48.99760749 +/-    0.1100
Period (y)              297.0209 +/-      0.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.08448125 +/-    0.0048
Ecliptic Y           -6.44648025 +/-    0.0007
Ecliptic Z           -0.84909636 +/-    0.0001
Ecliptic XDOT         0.00062309 +/-    0.0000
Ecliptic YDOT         0.00249261 +/-    0.0000
Ecliptic ZDOT        -0.00018019 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.56141334 +/-    0.0048
Geocenter to KBO     43.59809295 +/-    0.0049
# Hcoef:  8.85

The following table shows the complete astrometric record for 19QL110. 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 (19QL110) followed by the observatory code and reference code for the source of the astrometry.

2019 08  28.210895 23 32 39.174  -04 10 08.60  25.3r 19QL110   W84  C~7XLh      
2019 08  28.388381 23 32 38.454  -04 10 13.62  25.3r 19QL110   W84  C~7XLh      
2019 09  29.013696 23 30 27.492  -04 24 44.79  25.0r 19QL110   W84  C~7XLi      
2019 09  29.177510 23 30 26.821  -04 24 49.06  25.0r 19QL110   W84  C~7XLi      
2020 10  18.012125 23 33 51.400  -04 08 24.61  25.4r 19QL110   W84  C~7XLi      
2020 10  18.176134 23 33 50.821  -04 08 28.32  25.4r 19QL110   W84  C~7XLi      
2021 10  07.004805 23 39 10.461  -03 39 31.47  25.3r 19QL110   W84  C~7XLi      
2021 10  07.169933 23 39 09.821  -03 39 35.54  25.3r 19QL110   W84  C~7XLi      

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     0.09       0.00     0.13
     2   0.0005    -11.88    -0.09      -0.36    -0.07
     3   0.0871  -2155.68    -0.06     -27.62    -0.07
     4   0.0875  -2166.59     0.06     -27.59    -0.03
     5   1.1411   1033.69     0.06    -331.51     0.07
     6   1.1416   1024.26    -0.06    -331.49    -0.00
     7   2.1103   6106.25    -0.13    -631.63    -0.03
     8   2.1108   6095.84     0.13    -631.56    -0.00

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.

19QL110    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.531    44.598    44.465
ecceobj         0.096     0.101     0.092
incobj          4.063     4.063     4.063
qmin           39.592    39.436    39.745
qmax           49.549    49.843    49.252
amean          44.421    44.486    44.357
amin           44.066    44.125    44.002
amax           44.808    44.869    44.734
emean           0.091     0.095     0.086
emin            0.075     0.079     0.071
emax            0.106     0.111     0.101
imean           3.781     3.833     3.772
imin            3.183     3.200     3.179
imax            4.437     4.509     4.424
excite_mean     0.112     0.116     0.109
fracstop        1.000     1.000     1.000
cjmean          3.091     3.091     3.092

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       176.9     176.2     177.2
kozaiamp        180.0     179.9     180.0