Orbit Fit and Astrometric record for 19CP31

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: 19CP31    
# Created Tue Apr  1 01:11:11 2025
# Orbit generated from Bernstein formalism
# Fitting     13 observations of     13
# Arc:   1.94y
# First observation: 2019/02/05
#  Last observation: 2021/01/12
Preliminary a, adot, b, bdot, g, gdot:
   0.000006   0.026978  -0.000000  -0.000848   0.025881   0.000000
# Chi-squared of fit:     5.02 DOF:     20 RMS:  0.11
# Min/Max residuals:    -0.18    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.712531E-05  2.726462E-02 -2.871151E-07 -8.606823E-04  2.577333E-02  6.757773E-04
# Covariance matrix:
  5.1920E-13  4.6374E-11  1.5578E-14 -1.7197E-12  1.1277E-11  8.2673E-10
  4.6374E-11  1.2989E-08  5.9466E-12 -4.8149E-10  3.0215E-09  2.3044E-07
  1.5578E-14  5.9466E-12  1.6124E-13 -3.1268E-13  1.3695E-12  1.0543E-10
 -1.7197E-12 -4.8149E-10 -3.1268E-13  1.8034E-11 -1.1200E-10 -8.5420E-09
  1.1277E-11  3.0215E-09  1.3695E-12 -1.1200E-10  7.0397E-10  5.3609E-08
  8.2673E-10  2.3044E-07  1.0543E-10 -8.5420E-09  5.3609E-08  4.0882E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.701581 -177.954774    0.715114    0.044444   -0.685983  2458520.055801
# Heliocentric elements and errors
Epoch:              2458520.5000  =  2019/02/06
Mean Anomaly:            1.68700 +/-    29.908
Argument of Peri:      113.28283 +/-    38.658
Long of Asc Node:       65.50623 +/-     0.075
Inclination:             4.02828 +/-     0.003
Eccentricity:         0.12270397 +/-    0.0120
Semi-Major Axis:     45.01133079 +/-    0.4467
Time of Perihelion: 2458003.6163 +/-    9163.5
Perihelion:          39.48826196 +/-    0.6690
Aphelion:            50.53439962 +/-    0.7386
Period (y)              301.9889 +/-      4.50
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -39.40563189 +/-    0.0398
Ecliptic Y           -0.69984419 +/-    0.0014
Ecliptic Z            2.50488328 +/-    0.0026
Ecliptic XDOT         0.00003392 +/-    0.0002
Ecliptic YDOT        -0.00289885 +/-    0.0000
Ecliptic ZDOT        -0.00008681 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.49136674 +/-    0.0397
Geocenter to KBO     38.79979776 +/-    0.0399
# Hcoef:  8.87

The following table shows the complete astrometric record for 19CP31. 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 (19CP31) followed by the observatory code and reference code for the source of the astrometry.

2019 02  05.55500  12 13 23.72   +02 34 58.7   25.3i 19CP31    T09  C~8Aix      
2019 02  05.58442  12 13 23.64   +02 34 59.3   25.1i 19CP31    T09  C~8Aix      
2019 02  05.62764  12 13 23.51   +02 35 00.2   24.8i 19CP31    T09  C~8Aix      
2019 03  03.52564  12 11 47.80   +02 46 41.1   24.3z 19CP31    T09  C~8Aix      
2019 03  03.52832  12 11 47.78   +02 46 41.1   23.9z 19CP31    T09  C~8Aix      
2019 03  03.58217  12 11 47.55   +02 46 42.7   24.8z 19CP31    T09  C~8Aix      
2019 03  03.62241  12 11 47.37   +02 46 43.6   24.2z 19CP31    T09  C~8Aix      
2019 04  04.446698 12 09 19.98   +03 02 39.4         19CP31    T09  C~8Aix      
2019 04  05.522392 12 09 15.03   +03 03 09.7         19CP31    T09  C~8Aix      
2019 04  05.574759 12 09 14.78   +03 03 11.2         19CP31    T09  C~8Aix      
2021 01  11.621188 12 25 20.25   +01 08 44.5         19CP31    T14  C~8Aix      
2021 01  11.639535 12 25 20.26   +01 08 44.6         19CP31    T14  C~8Aix      
2021 01  12.666235 12 25 19.69   +01 08 53.7         19CP31    T14  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    -0.08       0.00    -0.05
     2   0.0001     -1.34     0.05       0.07    -0.07
     3   0.0002     -3.48     0.06       0.12    -0.17
     4   0.0711  -1598.06    -0.04      72.74     0.20
     5   0.0711  -1598.33    -0.12      72.62     0.08
     6   0.0713  -1602.13     0.01      72.72     0.11
     7   0.0714  -1604.96     0.10      72.47    -0.18
     8   0.1585  -4011.43     0.07      72.15    -0.12
     9   0.1614  -4091.54     0.03      70.52     0.11
    10   0.1616  -4095.57    -0.08      70.41     0.11
    11   1.9331  11927.56    -0.06    -461.48    -0.02
    12   1.9332  11927.66     0.24    -461.32     0.05
    13   1.9360  11916.15    -0.18    -456.39    -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.

19CP31    quality flag:1

Type:      CLASSICAL  SCATNEAR CLASSICAL

axisobj        44.761    50.123    43.840
ecceobj         0.117     0.286     0.142
incobj          4.031     4.022     4.036
qmin           38.707    33.999    37.175
qmax           51.474    68.964    51.302
amean          44.933    50.496    44.060
amin           44.567    49.433    43.698
amax           45.340    51.787    44.473
emean           0.120     0.300     0.133
emin            0.105     0.274     0.110
emax            0.136     0.332     0.154
imean           2.684     3.866     1.780
imin            1.924     1.953     0.372
imax            3.351     7.048     3.065
excite_mean     0.129     0.308     0.137
fracstop        1.000     1.000     1.000
cjmean          3.092     3.060     3.079

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       179.1     179.1     201.2
kozaiamp        180.0     179.9     180.0