Orbit Fit and Astrometric record for 19GK183

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: 19GK183   
# Created Tue Apr  1 01:11:13 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     15 observations of     15
# Arc:   5.15y
# First observation: 2014/04/02
#  Last observation: 2019/05/28
# Chi-squared of fit:     8.19 DOF:     24 RMS:  0.13
# Min/Max residuals:    -0.24    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.466575E-05  2.138026E-02 -7.706307E-07 -1.071941E-03  2.306959E-02  7.124424E-04
# Covariance matrix:
  1.4670E-12 -7.7815E-13 -1.7503E-14  2.7451E-14 -4.9877E-13 -4.5355E-12
 -7.7815E-13  9.2775E-13  2.8639E-14 -4.4471E-14  7.2073E-13  7.2947E-12
 -1.7503E-14  2.8639E-14  1.1243E-12 -2.3407E-13  1.8603E-14  2.4005E-13
  2.7451E-14 -4.4471E-14 -2.3407E-13  5.5038E-14 -3.2722E-14 -3.7176E-13
 -4.9877E-13  7.2073E-13  1.8603E-14 -3.2722E-14  1.2914E-12  5.8278E-12
 -4.5355E-12  7.2947E-12  2.4005E-13 -3.7176E-13  5.8278E-12  6.0862E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    9.322803 -163.228414    0.071424    0.161423   -0.982876  2456750.066556
# Heliocentric elements and errors
Epoch:              2456750.5000  =  2014/04/03
Mean Anomaly:          129.91503 +/-     0.315
Argument of Peri:      333.50619 +/-     0.312
Long of Asc Node:       89.13844 +/-     0.003
Inclination:             9.55033 +/-     0.000
Eccentricity:         0.04591629 +/-    0.0003
Semi-Major Axis:     43.01295795 +/-    0.0060
Time of Perihelion: 2419566.6571 +/-      90.5
Perihelion:          41.03796237 +/-    0.0129
Aphelion:            44.98795353 +/-    0.0131
Period (y)              282.1027 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.93066487 +/-    0.0020
Ecliptic Y          -12.56051627 +/-    0.0006
Ecliptic Z            7.02208706 +/-    0.0003
Ecliptic XDOT         0.00062701 +/-    0.0000
Ecliptic YDOT        -0.00246269 +/-    0.0000
Ecliptic ZDOT        -0.00011171 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.33119677 +/-    0.0019
Geocenter to KBO     43.34711706 +/-    0.0021
# Hcoef:  8.53

The following table shows the complete astrometric record for 19GK183. 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 (19GK183) followed by the observatory code and reference code for the source of the astrometry.

2014 04  02.565778 13 16 04.70   +02 01 35.8         19GK183   T09  C~870j      
2017 04  01.411755 13 29 27.09   +00 26 47.5         19GK183   T09  C~870j      
2017 04  01.483392 13 29 26.79   +00 26 49.3         19GK183   T09  C~870j      
2019 03  11.59564  13 39 38.64   -00 45 27.9   26.1g 19GK183   T09  C~7zqo      
2019 03  11.59773  13 39 38.64   -00 45 27.8   25.6g 19GK183   T09  C~7zqo      
2019 03  11.62926  13 39 38.52   -00 45 26.6   25.9g 19GK183   T09  C~7zqo      
2019 03  11.63972  13 39 38.50   -00 45 26.8   25.9g 19GK183   T09  C~7zqo      
2019 04  07.42328  13 37 54.52   -00 33 31.2   24.4i 19GK183   T09  C~7zqo      
2019 04  07.42596  13 37 54.49   -00 33 31.2   24.3i 19GK183   T09  C~7zqo      
2019 04  07.46665  13 37 54.32   -00 33 30.0   24.7i 19GK183   T09  C~7zqo      
2019 04  08.47095  13 37 50.02   -00 33 04.0   24.5y 19GK183   T09  C~7zqo      
2019 04  08.51144  13 37 49.85   -00 33 03.1   24.0y 19GK183   T09  C~7zqo      
2019 04  08.52220  13 37 49.81   -00 33 03.0   24.6y 19GK183   T09  C~7zqo      
2019 05  28.306868 13 34 32.56   -00 17 47.8         19GK183   T09  C~870j      
2019 05  28.414869 13 34 32.23   -00 17 46.9         19GK183   T09  C~870j      

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     0.00       0.00     0.01
     2   2.9975      0.00    -0.07       0.00     0.04
     3   2.9977      0.00     0.03       0.00    -0.08
     4   4.9392      0.00     0.07       0.00    -0.02
     5   4.9392      0.00     0.17       0.00     0.02
     6   4.9393      0.00    -0.02       0.00     0.39
     7   4.9393      0.00     0.21       0.00    -0.08
     8   5.0126      0.00     0.11       0.00     0.02
     9   5.0126      0.00    -0.16       0.00    -0.05
    10   5.0127      0.00    -0.06       0.00     0.09
    11   5.0155      0.00    -0.24       0.00     0.14
    12   5.0156      0.00    -0.15       0.00    -0.01
    13   5.0156      0.00    -0.05       0.00    -0.19
    14   5.1519      0.00    -0.03       0.00    -0.14
    15   5.1522      0.00     0.10       0.00    -0.12

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.

19GK183    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.718    42.718    42.718
ecceobj         0.050     0.050     0.050
incobj          9.547     9.547     9.547
qmin           39.711    39.731    39.699
qmax           46.406    46.432    46.418
amean          42.958    42.958    42.958
amin           42.631    42.633    42.628
amax           43.304    43.308    43.303
emean           0.056     0.056     0.056
emin            0.038     0.038     0.038
emax            0.072     0.073     0.072
imean           7.764     7.764     7.764
imin            6.944     6.944     6.945
imax            8.600     8.601     8.602
excite_mean     0.147     0.147     0.147
fracstop        1.000     1.000     1.000
cjmean          3.064     3.064     3.064

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       174.4     174.2     174.5
kozaiamp        179.9     179.9     180.0