Orbit Fit and Astrometric record for 19QG111

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: 19QG111   
# 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:
  -0.000005   0.022956  -0.000001  -0.000340   0.023862   0.000000
# Chi-squared of fit:    10.29 DOF:     10 RMS:  0.20
# Min/Max residuals:    -0.57    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.483347E-05  2.300534E-02 -1.483702E-06 -3.405476E-04  2.389069E-02  1.342328E-03
# Covariance matrix:
  7.3975E-13  6.2785E-13  7.6608E-16 -1.1462E-14  1.6444E-12  1.4713E-11
  6.2785E-13  4.7776E-12  8.5141E-15 -7.5940E-14  5.2273E-12  1.0728E-10
  7.6608E-16  8.5141E-15  3.5393E-13 -2.0549E-13  7.4774E-15  2.1895E-13
 -1.1462E-14 -7.5940E-14 -2.0549E-13  2.4977E-13 -8.0282E-14 -1.8529E-12
  1.6444E-12  5.2273E-12  7.4774E-15 -8.0282E-14  8.0374E-12  1.0907E-10
  1.4713E-11  1.0728E-10  2.1895E-13 -1.8529E-12  1.0907E-10  2.6496E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.198797   -7.172787    0.280207   -0.036997   -0.963757  2458725.713221
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:           75.27913 +/-     0.231
Argument of Peri:      166.56175 +/-     0.445
Long of Asc Node:      104.31935 +/-     0.029
Inclination:             2.31573 +/-     0.000
Eccentricity:         0.05577916 +/-    0.0022
Semi-Major Axis:     43.31033370 +/-    0.0131
Time of Perihelion: 2436950.5318 +/-      66.1
Perihelion:          40.89451972 +/-    0.0966
Aphelion:            45.72614768 +/-    0.0968
Period (y)              285.0332 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.42392895 +/-    0.0049
Ecliptic Y           -5.62796419 +/-    0.0006
Ecliptic Z           -1.60599534 +/-    0.0002
Ecliptic XDOT         0.00048868 +/-    0.0000
Ecliptic YDOT         0.00259734 +/-    0.0000
Ecliptic ZDOT        -0.00004513 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.82572766 +/-    0.0049
Geocenter to KBO     41.85731707 +/-    0.0050
# Hcoef:  9.65

The following table shows the complete astrometric record for 19QG111. 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 (19QG111) followed by the observatory code and reference code for the source of the astrometry.

2019 08  30.212420 23 37 08.517  -04 51 58.82  25.9r 19QG111   W84  C~7XLi      
2019 08  30.387214 23 37 07.776  -04 52 03.91  25.9r 19QG111   W84  C~7XLi      
2019 09  28.012277 23 35 04.187  -05 05 29.16  25.6r 19QG111   W84  C~7XLi      
2019 09  28.177548 23 35 03.457  -05 05 32.79  25.6r 19QG111   W84  C~7XLi      
2020 10  18.012125 23 38 34.447  -04 43 45.72  25.9r 19QG111   W84  C~7XLi      
2020 10  18.176134 23 38 33.839  -04 43 49.28  25.9r 19QG111   W84  C~7XLi      
2021 10  06.002765 23 44 14.852  -04 08 33.89  26.1r 19QG111   W84  C~7XLi      
2021 10  06.167954 23 44 14.160  -04 08 38.68  26.1r 19QG111   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     0.08       0.00     0.26
     2   0.0005    -12.19    -0.08      -0.29     0.08
     3   0.0788  -2026.99    -0.09      -8.95    -0.57
     4   0.0793  -2038.44     0.09      -7.97     0.26
     5   1.1357   1374.70     0.00     -56.35    -0.04
     6   1.1361   1364.94    -0.00     -56.01    -0.04
     7   2.1021   6887.98     0.09    -141.96     0.28
     8   2.1025   6876.57    -0.09    -142.23    -0.22

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.

19QG111    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.350    43.395    43.305
ecceobj         0.052     0.056     0.049
incobj          2.317     2.318     2.318
qmin           40.450    40.312    40.545
qmax           46.231    46.419    46.036
amean          43.238    43.284    43.194
amin           42.899    42.952    42.857
amax           43.585    43.632    43.532
emean           0.043     0.046     0.040
emin            0.024     0.027     0.020
emax            0.061     0.064     0.058
imean           1.166     1.159     1.175
imin            0.084     0.086     0.082
imax            1.840     1.833     1.855
excite_mean     0.049     0.052     0.046
fracstop        1.000     1.000     1.000
cjmean          3.090     3.090     3.089

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       171.6     172.2     172.0
kozaiamp        179.9     180.0     180.0