Orbit Fit and Astrometric record for 19CQ31

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: 19CQ31    
# Created Tue Apr  1 01:11:11 2025
# Orbit generated from Bernstein formalism
# Fitting     14 observations of     14
# Arc:   1.05y
# First observation: 2018/03/18
#  Last observation: 2019/04/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000046   0.024712  -0.000002   0.000377   0.024446   0.000000
# Chi-squared of fit:     6.13 DOF:     22 RMS:  0.12
# Min/Max residuals:    -0.21    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.619443E-05  2.472531E-02 -3.193592E-07  3.775391E-04  2.468391E-02  8.695298E-04
# Covariance matrix:
  1.4091E-12  2.9423E-12  9.0487E-15  4.8888E-14  3.2133E-12  1.7919E-10
  2.9423E-12  2.5244E-11  4.9894E-14  3.0887E-13  1.9386E-11  1.1336E-09
  9.0487E-15  4.9894E-14  7.9239E-13 -8.3162E-13  4.8464E-14  2.4500E-12
  4.8888E-14  3.0887E-13 -8.3162E-13  1.0128E-12  2.5230E-13  1.4518E-11
  3.2133E-12  1.9386E-11  4.8464E-14  2.5230E-13  1.6806E-11  9.2442E-10
  1.7919E-10  1.1336E-09  2.4500E-12  1.4518E-11  9.2442E-10  5.3263E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.185665  179.063899    0.031117    0.072621   -0.991212  2458196.058121
# Heliocentric elements and errors
Epoch:              2458190.5000  =  2018/03/13
Mean Anomaly:           26.41912 +/-     6.176
Argument of Peri:       47.61528 +/-     7.252
Long of Asc Node:      101.27364 +/-     0.034
Inclination:             4.18016 +/-     0.000
Eccentricity:         0.06773598 +/-    0.0049
Semi-Major Axis:     44.13769830 +/-    0.0211
Time of Perihelion: 2450330.3882 +/-    1837.4
Perihelion:          41.14798827 +/-    0.2166
Aphelion:            47.12740833 +/-    0.2169
Period (y)              293.2397 +/-      0.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.39335129 +/-    0.0067
Ecliptic Y            0.70029601 +/-    0.0001
Ecliptic Z            2.95694897 +/-    0.0005
Ecliptic XDOT        -0.00013156 +/-    0.0000
Ecliptic YDOT        -0.00274504 +/-    0.0000
Ecliptic ZDOT         0.00004865 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.50474061 +/-    0.0067
Geocenter to KBO     40.51222628 +/-    0.0067
# Hcoef:  8.14

The following table shows the complete astrometric record for 19CQ31. 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 (19CQ31) followed by the observatory code and reference code for the source of the astrometry.

2018 03  18.557320 12 03 14.20   +04 12 43.2         19CQ31    T09  C~8Aix      
2018 04  22.424355 12 00 45.10   +04 27 58.6         19CQ31    T09  C~8Aix      
2019 02  05.55500  12 11 08.56   +03 20 31.6   24.0i 19CQ31    T09  C~8Aix      
2019 02  05.59805  12 11 08.43   +03 20 32.6   23.9i 19CQ31    T09  C~8Aix      
2019 02  05.62497  12 11 08.36   +03 20 33.2   23.9i 19CQ31    T09  C~8Aix      
2019 02  05.64110  12 11 08.32   +03 20 33.6   24.0i 19CQ31    T09  C~8Aix      
2019 02  28.574368 12 09 47.90   +03 30 50.4         19CQ31    T09  C~8Aix      
2019 02  28.577748 12 09 47.89   +03 30 50.3         19CQ31    T09  C~8Aix      
2019 03  03.51760  12 09 35.72   +03 32 17.1   24.6z 19CQ31    T09  C~8Aix      
2019 03  03.53922  12 09 35.63   +03 32 17.7   24.0z 19CQ31    T09  C~8Aix      
2019 03  03.54189  12 09 35.63   +03 32 17.9   24.4z 19CQ31    T09  C~8Aix      
2019 04  04.446698 12 07 14.06   +03 47 57.2         19CQ31    T09  C~8Aix      
2019 04  04.469928 12 07 13.96   +03 47 57.8         19CQ31    T09  C~8Aix      
2019 04  06.303674 12 07 05.93   +03 48 47.4         19CQ31    T09  C~8Aix      

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     0.12
     2   0.0955  -2410.27     0.07     -48.93    -0.16
     3   0.8871   7763.44     0.06     -31.21     0.01
     4   0.8872   7761.25    -0.01     -31.08    -0.03
     5   0.8872   7760.05     0.11     -30.95    -0.01
     6   0.8873   7759.34     0.20     -30.82     0.05
     7   0.9501   6407.34    -0.12      51.80     0.31
     8   0.9501   6407.25     0.02      51.65     0.15
     9   0.9581   6205.34    -0.21      58.21    -0.12
    10   0.9582   6203.87    -0.17      58.22    -0.14
    11   0.9582   6203.79    -0.06      58.40     0.04
    12   1.0456   3884.38     0.05      71.04    -0.06
    13   1.0456   3882.76     0.12      70.99    -0.07
    14   1.0506   3752.73     0.01      68.39    -0.09

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.

19CQ31    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.823    43.993    43.707
ecceobj         0.063     0.083     0.050
incobj          4.177     4.178     4.177
qmin           40.124    39.368    40.702
qmax           48.108    49.209    47.296
amean          43.982    44.145    43.872
amin           43.643    43.792    43.525
amax           44.354    44.532    44.235
emean           0.068     0.089     0.053
emin            0.052     0.071     0.037
emax            0.085     0.105     0.069
imean           2.589     2.642     2.546
imin            1.847     1.838     1.844
imax            3.252     3.361     3.205
excite_mean     0.082     0.100     0.069
fracstop        1.000     1.000     1.000
cjmean          3.093     3.091     3.094

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       177.9     175.7     181.2
kozaiamp        180.0     180.0     180.0