Orbit Fit and Astrometric record for 19QF111

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: 19QF111   
# Created Tue Apr  1 01:11:15 2025
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   2.11y
# First observation: 2019/08/30
#  Last observation: 2021/10/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000005   0.019653  -0.000000   0.000860   0.021938   0.000000
# Chi-squared of fit:     0.35 DOF:     10 RMS:  0.04
# Min/Max residuals:    -0.09    0.06
# Exact a, adot, b, bdot, g, gdot:
  1.415976E-05  1.970274E-02  5.767480E-07  8.635166E-04  2.197663E-02  1.343724E-03
# Covariance matrix:
  7.3939E-13  5.5015E-13 -3.9265E-15  2.4548E-14  1.6283E-12  1.4845E-11
  5.5015E-13  4.2741E-12 -2.6239E-14  1.9928E-13  4.8081E-12  1.1430E-10
 -3.9265E-15 -2.6239E-14  3.5364E-13 -2.0633E-13 -2.8378E-14 -7.7185E-13
  2.4548E-14  1.9928E-13 -2.0633E-13  2.5888E-13  1.9985E-13  6.0045E-12
  1.6283E-12  4.8081E-12 -2.8378E-14  1.9985E-13  7.9025E-12  1.1690E-10
  1.4845E-11  1.1430E-10 -7.7185E-13  6.0045E-12  1.1690E-10  3.4231E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.326120   -8.235926    0.262264   -0.039343   -0.968701  2458725.713221
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:          121.12560 +/-     1.261
Argument of Peri:      188.99270 +/-     1.240
Long of Asc Node:       33.82295 +/-     0.016
Inclination:             3.37583 +/-     0.001
Eccentricity:         0.07983585 +/-    0.0022
Semi-Major Axis:     44.44625575 +/-    0.0166
Time of Perihelion: 2422305.1370 +/-     378.4
Perihelion:          40.89785108 +/-    0.0998
Aphelion:            47.99466043 +/-    0.1003
Period (y)              296.3200 +/-      0.17
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           45.92127094 +/-    0.0058
Ecliptic Y           -6.91829849 +/-    0.0009
Ecliptic Z           -1.84681431 +/-    0.0002
Ecliptic XDOT         0.00052994 +/-    0.0000
Ecliptic YDOT         0.00240525 +/-    0.0000
Ecliptic ZDOT         0.00010047 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.47619501 +/-    0.0057
Geocenter to KBO     45.50289017 +/-    0.0058
# Hcoef:  7.19

The following table shows the complete astrometric record for 19QF111. 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 (19QF111) followed by the observatory code and reference code for the source of the astrometry.

2019 08  30.212420 23 33 25.578  -05 24 13.31  23.8r 19QF111   W84  C~7XLi      
2019 08  30.387214 23 33 24.884  -05 24 17.75  23.8r 19QF111   W84  C~7XLi      
2019 09  28.012277 23 31 29.039  -05 36 27.33  23.7r 19QF111   W84  C~7XLi      
2019 09  28.177548 23 31 28.362  -05 36 31.23  23.7r 19QF111   W84  C~7XLi      
2020 10  16.001792 23 34 23.934  -05 13 55.54  23.8r 19QF111   W84  C~7XLi      
2020 10  16.175804 23 34 23.316  -05 13 59.04  23.8r 19QF111   W84  C~7XLi      
2021 10  07.004805 23 39 02.157  -04 41 05.42  23.8r 19QF111   W84  C~7XLi      
2021 10  07.169933 23 39 01.515  -04 41 09.27  23.8r 19QF111   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     0.00       0.00     0.01
     2   0.0005    -11.27    -0.00       0.02     0.01
     3   0.0788  -1888.51     0.02      13.10    -0.09
     4   0.0793  -1899.34    -0.02      13.51     0.06
     5   1.1302   1044.87     0.05     222.57     0.01
     6   1.1306   1035.01    -0.05     223.01     0.01
     7   2.1048   5644.38     0.03     382.18     0.02
     8   2.1053   5634.03    -0.03     382.46    -0.03

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.

19QF111    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.479    44.533    44.428
ecceobj         0.075     0.079     0.072
incobj          3.371     3.371     3.371
qmin           40.200    40.113    40.253
qmax           48.788    48.957    48.577
amean          44.375    44.428    44.323
amin           44.021    44.074    43.959
amax           44.750    44.812    44.696
emean           0.075     0.078     0.073
emin            0.059     0.062     0.057
emax            0.090     0.093     0.087
imean           2.889     2.890     2.885
imin            2.166     2.173     2.153
imax            3.459     3.455     3.461
excite_mean     0.091     0.093     0.088
fracstop        1.000     1.000     1.000
cjmean          3.096     3.096     3.096

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       180.4     180.6     180.2
kozaiamp        180.0     180.0     180.0