Orbit Fit and Astrometric record for 19QE111

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: 19QE111   
# Created Tue Apr  1 01:11:15 2025
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:   2.09y
# First observation: 2019/08/29
#  Last observation: 2021/10/02
Preliminary a, adot, b, bdot, g, gdot:
   0.000012   0.020223  -0.000000   0.000018   0.022324   0.000000
# Chi-squared of fit:     0.95 DOF:     14 RMS:  0.05
# Min/Max residuals:    -0.14    0.10
# Exact a, adot, b, bdot, g, gdot:
  1.470620E-05  2.020829E-02 -2.051627E-07  1.791378E-05  2.227213E-02  1.234168E-05
# Covariance matrix:
  6.9315E-13  5.8433E-13 -9.4307E-16  6.4332E-16  1.5000E-12  1.9185E-11
  5.8433E-13  4.4027E-12 -2.2957E-15  4.0624E-15  4.9625E-12  1.1419E-10
 -9.4307E-16 -2.2957E-15  3.5057E-13 -1.9035E-13 -4.2328E-15 -5.7485E-14
  6.4332E-16  4.0624E-15 -1.9035E-13  1.7797E-13  4.4729E-15  1.1069E-13
  1.5000E-12  4.9625E-12 -4.2328E-15  4.4729E-15  7.5650E-12  1.2897E-10
  1.9185E-11  1.1419E-10 -5.7485E-14  1.1069E-13  1.2897E-10  3.1017E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.933055   -9.702332    0.253928   -0.032777   -0.971305  2458724.712719
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:          182.47789 +/-     3.616
Argument of Peri:       88.94884 +/-     3.615
Long of Asc Node:       78.72869 +/-     0.036
Inclination:             1.89237 +/-     0.000
Eccentricity:         0.04179825 +/-    0.0002
Semi-Major Axis:     44.03617369 +/-    0.0131
Time of Perihelion: 2511354.0599 +/-    1071.9
Perihelion:          42.19553854 +/-    0.0150
Aphelion:            45.87680883 +/-    0.0159
Period (y)              292.2285 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           45.14978811 +/-    0.0055
Ecliptic Y           -7.98356005 +/-    0.0010
Ecliptic Z           -1.51453677 +/-    0.0002
Ecliptic XDOT         0.00042868 +/-    0.0000
Ecliptic YDOT         0.00244892 +/-    0.0000
Ecliptic ZDOT         0.00000192 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.87520484 +/-    0.0054
Geocenter to KBO     44.89916548 +/-    0.0055
# Hcoef:  8.55

The following table shows the complete astrometric record for 19QE111. 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 (19QE111) followed by the observatory code and reference code for the source of the astrometry.

2019 08  29.211918 23 27 23.531  -05 37 15.53  25.1r 19QE111   W84  C~7XLi      
2019 08  29.387113 23 27 22.841  -05 37 20.19  25.1r 19QE111   W84  C~7XLi      
2019 09  27.014583 23 25 25.908  -05 49 46.85  24.9r 19QE111   W84  C~7XLi      
2019 09  27.176040 23 25 25.247  -05 49 51.03  24.9r 19QE111   W84  C~7XLi      
2020 10  16.001792 23 28 28.552  -05 29 51.78  25.3r 19QE111   W84  C~7XLi      
2020 10  16.175804 23 28 27.950  -05 29 55.24  25.3r 19QE111   W84  C~7XLi      
2021 09  13.055538 23 34 55.205  -04 48 48.27  25.0r 19QE111   W84  C~7XLi      
2021 09  13.174687 23 34 54.703  -04 48 51.50  25.0r 19QE111   W84  C~7XLi      
2021 10  02.027293 23 33 37.888  -04 56 57.54  25.0r 19QE111   W84  C~7XLi      
2021 10  02.165093 23 33 37.333  -04 57 00.83  25.0r 19QE111   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    -0.07       0.00     0.04
     2   0.0005    -11.30     0.07      -0.23    -0.14
     3   0.0789  -1909.61     0.05       0.29     0.10
     4   0.0793  -1920.33    -0.05       0.33    -0.02
     5   1.1329   1067.06    -0.03      25.16    -0.00
     6   1.1334   1057.43     0.03      25.53     0.04
     7   2.0420   7349.80     0.04       2.67    -0.00
     8   2.0423   7341.62    -0.03       2.68    -0.03
     9   2.0940   6093.64    -0.00      11.69    -0.04
    10   2.0943   6084.71    -0.01      11.96     0.05

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.

19QE111    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.084    44.117    44.050
ecceobj         0.040     0.040     0.040
incobj          1.894     1.894     1.894
qmin           41.072    41.098    41.052
qmax           47.108    47.089    47.040
amean          43.973    44.008    43.940
amin           43.632    43.667    43.601
amax           44.336    44.372    44.295
emean           0.046     0.047     0.046
emin            0.030     0.031     0.030
emax            0.063     0.062     0.062
imean           0.711     0.708     0.714
imin            0.252     0.235     0.264
imax            1.064     1.062     1.068
excite_mean     0.048     0.049     0.048
fracstop        1.000     1.000     1.000
cjmean          3.098     3.099     3.098

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       170.7     169.0     171.9
kozaiamp        180.0     179.9     180.0