Orbit Fit and Astrometric record for 19CH32

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: 19CH32    
# Created Tue Apr  1 01:11:11 2025
# Orbit generated from Bernstein formalism
# Fitting     18 observations of     18
# Arc:   3.08y
# First observation: 2016/02/05
#  Last observation: 2019/03/08
Preliminary a, adot, b, bdot, g, gdot:
  -0.000052   0.021812   0.000000   0.000127   0.022965   0.000000
# Chi-squared of fit:     5.88 DOF:     30 RMS:  0.10
# Min/Max residuals:    -0.22    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.523526E-05  2.170932E-02 -4.162698E-07  1.261464E-04  2.316174E-02 -5.038441E-04
# Covariance matrix:
  7.3347E-13 -7.1268E-13  1.2221E-15 -3.0342E-15 -4.6786E-13 -7.1645E-12
 -7.1268E-13  5.4414E-12 -1.9127E-14  3.2363E-14  7.6230E-12  7.8136E-11
  1.2221E-15 -1.9127E-14  6.3314E-13 -2.2204E-13 -2.9460E-14 -2.7923E-13
 -3.0342E-15  3.2363E-14 -2.2204E-13  8.9373E-14  4.5815E-14  4.7246E-13
 -4.6786E-13  7.6230E-12 -2.9460E-14  4.5815E-14  1.1821E-11  1.1129E-10
 -7.1645E-12  7.8136E-11 -2.7923E-13  4.7246E-13  1.1129E-10  1.1407E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.886481  173.625480    0.603391    0.025769   -0.777370  2457424.150211
# Heliocentric elements and errors
Epoch:              2457420.5000  =  2016/02/02
Mean Anomaly:          248.89308 +/-     1.204
Argument of Peri:      194.39674 +/-     1.159
Long of Asc Node:       93.75996 +/-     0.024
Inclination:             1.88688 +/-     0.000
Eccentricity:         0.04016898 +/-    0.0013
Semi-Major Axis:     43.27462801 +/-    0.0193
Time of Perihelion: 2489511.7808 +/-     347.1
Perihelion:          41.53633029 +/-    0.0599
Aphelion:            45.01292574 +/-    0.0604
Period (y)              284.6808 +/-      0.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -43.59428525 +/-    0.0064
Ecliptic Y            5.47466596 +/-    0.0007
Ecliptic Z            1.42126134 +/-    0.0002
Ecliptic XDOT        -0.00022573 +/-    0.0000
Ecliptic YDOT        -0.00256393 +/-    0.0000
Ecliptic ZDOT         0.00001296 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.95968218 +/-    0.0063
Geocenter to KBO     43.17464237 +/-    0.0064
# Hcoef:  8.99

The following table shows the complete astrometric record for 19CH32. 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 (19CH32) followed by the observatory code and reference code for the source of the astrometry.

2016 02  05.649422 11 39 35.07   +04 15 48.5         19CH32    T09  C~8Mhg      
2016 02  05.660183 11 39 35.04   +04 15 48.5         19CH32    T09  C~8Mhg      
2018 03  18.463065 11 46 05.49   +03 35 15.8         19CH32    T09  C~8Mhg      
2018 03  18.46308  11 46 05.48   +03 35 15.8   24.8i 19CH32    T09  C~8Mhg      
2018 03  18.50571  11 46 05.30   +03 35 17.0   25.3i 19CH32    T09  C~8Mhg      
2018 03  18.578696 11 46 04.99   +03 35 19.0         19CH32    T09  C~8Mhg      
2019 02  02.642150 11 53 31.64   +02 46 30.9         19CH32    T09  C~8Mhg      
2019 02  04.58875  11 53 25.99   +02 47 11.8   26.6g 19CH32    T09  C~8Mhg      
2019 02  04.63313  11 53 25.87   +02 47 12.8   26.4g 19CH32    T09  C~8Mhg      
2019 02  04.66250  11 53 25.77   +02 47 13.3   26.0g 19CH32    T09  C~8Mhg      
2019 02  05.45789  11 53 23.42   +02 47 30.6   24.7i 19CH32    T09  C~8Mhg      
2019 02  05.47392  11 53 23.37   +02 47 30.9   25.1i 19CH32    T09  C~8Mhg      
2019 02  05.51157  11 53 23.25   +02 47 31.4   24.4i 19CH32    T09  C~8Mhg      
2019 02  05.51425  11 53 23.24   +02 47 31.6   24.6i 19CH32    T09  C~8Mhg      
2019 02  28.531376 11 52 00.35   +02 57 06.0         19CH32    T09  C~8Mhg      
2019 03  08.35114  11 51 27.76   +03 00 44.1   25.5r 19CH32    T09  C~8Mhg      
2019 03  08.36022  11 51 27.71   +03 00 44.3   25.1r 19CH32    T09  C~8Mhg      
2019 03  08.43604  11 51 27.38   +03 00 46.5   25.8r 19CH32    T09  C~8Mhg      

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    -0.09       0.00     0.10
     2   0.0000     -0.41     0.09      -0.18    -0.09
     3   2.1131   6330.11     0.00      89.03     0.01
     4   2.1131   6329.98    -0.13      88.97    -0.05
     5   2.1132   6327.02    -0.02      89.00     0.00
     6   2.1134   6321.97     0.15      88.98     0.02
     7   2.9925  13641.96     0.26      73.60    -0.10
     8   2.9978  13547.61    -0.14      77.25    -0.08
     9   2.9979  13545.55     0.03      77.45     0.06
    10   2.9980  13543.97    -0.07      77.31    -0.12
    11   3.0002  13504.61    -0.06      79.09     0.14
    12   3.0002  13503.80    -0.05      79.07     0.09
    13   3.0003  13501.95     0.03      78.80    -0.22
    14   3.0003  13501.73    -0.05      78.93    -0.10
    15   3.0633  12128.58     0.11     109.17     0.07
    16   3.0847  11592.14     0.08     114.09     0.16
    17   3.0848  11591.37    -0.05     113.97     0.04
    18   3.0850  11585.94    -0.10     114.01     0.08

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.

19CH32    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.891    42.939    42.844
ecceobj         0.043     0.046     0.041
incobj          1.886     1.886     1.886
qmin           40.463    40.398    40.525
qmax           45.834    45.976    45.696
amean          43.050    43.100    43.002
amin           42.719    42.777    42.663
amax           43.404    43.444    43.345
emean           0.039     0.041     0.037
emin            0.016     0.019     0.015
emax            0.056     0.059     0.054
imean           1.052     1.035     1.070
imin            0.282     0.286     0.276
imax            1.602     1.573     1.641
excite_mean     0.044     0.046     0.043
fracstop        1.000     1.000     1.000
cjmean          3.088     3.088     3.087

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       170.8     170.0     172.4
kozaiamp        179.9     180.0     179.9