Orbit Fit and Astrometric record for 19CO31

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: 19CO31    
# Created Wed Dec 25 02:11:00 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     25 observations of     25
# Arc:   5.90y
# First observation: 2014/02/27
#  Last observation: 2020/01/21
# Chi-squared of fit:    12.36 DOF:     44 RMS:  0.12
# Min/Max residuals:    -0.30    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.383733E-05  2.348500E-02  1.101043E-05  1.585860E-02  2.633026E-02 -4.197106E-03
# Covariance matrix:
  2.7651E-13 -9.4191E-14  1.1913E-14 -2.9143E-14  3.1468E-14 -3.2512E-13
 -9.4191E-14  4.0002E-13 -1.1246E-13  2.7247E-13  6.1052E-13  3.0216E-12
  1.1913E-14 -1.1246E-13  2.7808E-13 -1.2911E-13 -1.8128E-13 -8.7911E-13
 -2.9143E-14  2.7247E-13 -1.2911E-13  2.0520E-13  4.3814E-13  2.1298E-12
  3.1468E-14  6.1052E-13 -1.8128E-13  4.3814E-13  1.3584E-12  4.8514E-12
 -3.2512E-13  3.0216E-12 -8.7911E-13  2.1298E-12  4.8514E-12  2.3617E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.280185  174.499428    0.269196   -0.004551   -0.951076  2456715.994350
# Heliocentric elements and errors
Epoch:              2456716.5000  =  2014/02/28
Mean Anomaly:          327.28306 +/-     0.017
Argument of Peri:       50.08888 +/-     0.025
Long of Asc Node:      174.50499 +/-     0.000
Inclination:            34.02752 +/-     0.000
Eccentricity:         0.22474538 +/-    0.0002
Semi-Major Axis:     46.85604271 +/-    0.0106
Time of Perihelion: 2467363.2485 +/-      36.4
Perihelion:          36.32536342 +/-    0.0129
Aphelion:            57.38672199 +/-    0.0163
Period (y)              320.7426 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.72606734 +/-    0.0017
Ecliptic Y            4.00119794 +/-    0.0002
Ecliptic Z           -0.18530331 +/-    0.0000
Ecliptic XDOT         0.00018653 +/-    0.0000
Ecliptic YDOT        -0.00247477 +/-    0.0000
Ecliptic ZDOT         0.00165124 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.93276042 +/-    0.0017
Geocenter to KBO     37.97925205 +/-    0.0017
# Hcoef:  7.76

The following table shows the complete astrometric record for 19CO31. 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 (19CO31) followed by the observatory code and reference code for the source of the astrometry.

2014 02  27.493572 11 39 21.55   +01 55 40.5         19CO31    T09  C~8Aix      
2014 02  27.508698 11 39 21.50   +01 55 41.2         19CO31    T09  C~8Aix      
2014 02  27.529327 11 39 21.38   +01 55 42.2         19CO31    T09  C~8Aix      
2014 02  27.543474 11 39 21.32   +01 55 42.8         19CO31    T09  C~8Aix      
2015 03  30.262237 11 43 25.18   +02 34 04.1         19CO31    T09  C~8Aix      
2015 03  30.271763 11 43 25.13   +02 34 04.4         19CO31    T09  C~8Aix      
2015 03  30.281376 11 43 25.09   +02 34 04.8         19CO31    T09  C~8Aix      
2018 04  22.282636 12 01 20.75   +03 42 47.8         19CO31    T09  C~8Aix      
2018 04  22.367255 12 01 20.42   +03 42 50.5         19CO31    T09  C~8Aix      
2019 02  05.55500  12 13 22.67   +03 11 55.8   23.0i 19CO31    T09  C~8Aix      
2019 02  05.60072  12 13 22.52   +03 11 57.5   23.5i 19CO31    T09  C~8Aix      
2019 02  05.64110  12 13 22.41   +03 11 59.0   23.4i 19CO31    T09  C~8Aix      
2019 02  28.577748 12 11 59.24   +03 26 31.6         19CO31    T09  C~8Aix      
2019 03  03.51760  12 11 46.53   +03 28 32.6   23.4z 19CO31    T09  C~8Aix      
2019 03  03.52028  12 11 46.50   +03 28 32.4   23.7z 19CO31    T09  C~8Aix      
2019 03  03.54189  12 11 46.40   +03 28 33.6   23.2z 19CO31    T09  C~8Aix      
2019 03  03.58217  12 11 46.21   +03 28 35.1   23.2z 19CO31    T09  C~8Aix      
2019 03  03.63313  12 11 46.00   +03 28 37.3   23.2z 19CO31    T09  C~8Aix      
2019 03  03.63583  12 11 46.00   +03 28 37.3   23.7z 19CO31    T09  C~8Aix      
2019 04  04.469928 12 09 17.04   +03 50 23.8         19CO31    T09  C~8Aix      
2019 04  04.493018 12 09 16.93   +03 50 24.7         19CO31    T09  C~8Aix      
2019 04  05.532868 12 09 12.09   +03 51 04.7         19CO31    T09  C~8Aix      
2019 04  05.555906 12 09 11.99   +03 51 05.6         19CO31    T09  C~8Aix      
2020 01  20.551578 12 20 34.81   +03 21 26.4         19CO31    T09  C~8Aix      
2020 01  21.635744 12 20 33.36   +03 21 55.7         19CO31    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    -0.30
     2   0.0000      0.00     0.22       0.00    -0.19
     3   0.0001      0.00    -0.16       0.00     0.02
     4   0.0001      0.00    -0.09       0.00     0.07
     5   1.0836      0.00     0.09       0.00     0.20
     6   1.0836      0.00     0.00       0.00     0.13
     7   1.0836      0.00     0.07       0.00     0.15
     8   4.1473      0.00    -0.10       0.00     0.03
     9   4.1475      0.00     0.01       0.00     0.03
    10   4.9393      0.00     0.04       0.00    -0.01
    11   4.9394      0.00    -0.19       0.00     0.13
    12   4.9395      0.00    -0.05       0.00     0.24
    13   5.0023      0.00     0.14       0.00    -0.02
    14   5.0103      0.00     0.17       0.00     0.11
    15   5.0103      0.00    -0.10       0.00    -0.20
    16   5.0104      0.00    -0.15       0.00     0.11
    17   5.0105      0.00    -0.29       0.00    -0.06
    18   5.0106      0.00    -0.04       0.00     0.04
    19   5.0107      0.00     0.14       0.00    -0.07
    20   5.0978      0.00     0.04       0.00    -0.04
    21   5.0979      0.00     0.03       0.00    -0.03
    22   5.1007      0.00    -0.05       0.00    -0.09
    23   5.1008      0.00     0.08       0.00    -0.07
    24   5.8948      0.00     0.07       0.00    -0.08
    25   5.8977      0.00     0.12       0.00    -0.07

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.

19CO31    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.548    46.548    46.548
ecceobj         0.221     0.221     0.221
incobj         34.138    34.138    34.138
qmin           35.320    35.266    35.227
qmax           58.616    58.689    58.724
amean          46.729    46.729    46.727
amin           46.324    46.329    46.305
amax           47.229    47.221    47.214
emean           0.225     0.225     0.226
emin            0.207     0.208     0.207
emax            0.242     0.244     0.244
imean          33.518    33.502    33.493
imin           33.207    33.181    33.165
imax           33.883    33.867    33.868
excite_mean     0.596     0.596     0.596
fracstop        1.000     1.000     1.000
cjmean          2.668     2.668     2.668

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       175.7     175.5     175.1
kozaiamp        179.9     180.0     180.0