Orbit Fit and Astrometric record for 19GT184

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: 19GT184   
# Created Tue Apr  1 01:11:13 2025
# Orbit generated from Bernstein formalism
# Fitting     19 observations of     19
# Arc:   0.98y
# First observation: 2018/04/13
#  Last observation: 2019/04/05
Preliminary a, adot, b, bdot, g, gdot:
  -0.000011   0.019529   0.000001  -0.000772   0.021690   0.000000
# Chi-squared of fit:    11.98 DOF:     32 RMS:  0.14
# Min/Max residuals:    -0.36    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.410213E-05  1.945354E-02  3.334730E-07 -7.722202E-04  2.185591E-02 -4.261469E-04
# Covariance matrix:
  1.1170E-12  8.6606E-12  2.4607E-14 -3.7849E-13  7.1440E-12  4.8988E-10
  8.6606E-12  2.3487E-10  6.2315E-13 -9.4155E-12  1.7967E-10  1.2172E-08
  2.4607E-14  6.2315E-13  7.2214E-13 -7.9881E-13  4.8190E-13  3.2455E-11
 -3.7849E-13 -9.4155E-12 -7.9881E-13  1.3098E-12 -7.2390E-12 -4.8997E-10
  7.1440E-12  1.7967E-10  4.8190E-13 -7.2390E-12  1.3863E-10  9.3545E-09
  4.8988E-10  1.2172E-08  3.2455E-11 -4.8997E-10  9.3545E-09  6.3338E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.310451  179.702059   -0.388434    0.053254   -0.918896  2458221.637617
# Heliocentric elements and errors
Epoch:              2458220.5000  =  2018/04/12
Mean Anomaly:          196.33744 +/-    35.629
Argument of Peri:      290.67271 +/-    35.615
Long of Asc Node:       54.91696 +/-     0.040
Inclination:             3.97256 +/-     0.002
Eccentricity:         0.06011944 +/-    0.0090
Semi-Major Axis:     44.11909387 +/-    0.1034
Time of Perihelion: 2506881.9599 +/-   10592.1
Perihelion:          41.46667865 +/-    0.4083
Aphelion:            46.77150909 +/-    0.4114
Period (y)              293.0543 +/-      1.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -46.60087335 +/-    0.0246
Ecliptic Y           -0.15336760 +/-    0.0002
Ecliptic Z            2.64214654 +/-    0.0014
Ecliptic XDOT         0.00004158 +/-    0.0001
Ecliptic YDOT        -0.00244144 +/-    0.0000
Ecliptic ZDOT        -0.00009981 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.67596659 +/-    0.0246
Geocenter to KBO     45.75422457 +/-    0.0246
# Hcoef:  7.87

The following table shows the complete astrometric record for 19GT184. 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 (19GT184) followed by the observatory code and reference code for the source of the astrometry.

2018 04  13.136816 12 04 10.76   +03 09 19.8         19GT184   W84  C~870j      
2018 04  22.367255 12 03 37.49   +03 12 31.8         19GT184   T09  C~870j      
2019 02  05.53446  12 12 20.82   +02 12 43.9   24.0i 19GT184   T09  C~83GF      
2019 02  05.53784  12 12 20.82   +02 12 44.1   23.8i 19GT184   T09  C~83GF      
2019 02  05.58442  12 12 20.70   +02 12 44.8   23.9i 19GT184   T09  C~83GF      
2019 02  05.62764  12 12 20.59   +02 12 45.6   23.9i 19GT184   T09  C~83GF      
2019 02  28.557380 12 11 07.39   +02 21 32.8         19GT184   T09  C~870j      
2019 02  28.610572 12 11 07.17   +02 21 34.0         19GT184   T09  C~870j      
2019 04  04.44671  12 08 47.50   +02 36 41.0   24.7g 19GT184   T09  C~83GF      
2019 04  04.45724  12 08 47.48   +02 36 41.0   24.9g 19GT184   T09  C~83GF      
2019 04  04.45934  12 08 47.46   +02 36 41.0   25.8g 19GT184   T09  C~83GF      
2019 04  04.48040  12 08 47.40   +02 36 41.5   25.3g 19GT184   T09  C~83GF      
2019 04  04.49303  12 08 47.32   +02 36 42.0   25.3g 19GT184   T09  C~83GF      
2019 04  04.51189  12 08 47.25   +02 36 42.3   25.8g 19GT184   T09  C~83GF      
2019 04  05.52031  12 08 43.21   +02 37 06.7   24.4r 19GT184   T09  C~83GF      
2019 04  05.52240  12 08 43.21   +02 37 06.7   24.2r 19GT184   T09  C~83GF      
2019 04  05.54335  12 08 43.12   +02 37 07.5   24.2r 19GT184   T09  C~83GF      
2019 04  05.55592  12 08 43.07   +02 37 07.8   24.3r 19GT184   T09  C~83GF      
2019 04  05.57477  12 08 43.00   +02 37 08.2   24.7r 19GT184   T09  C~83GF      

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    -0.01       0.00    -0.18
     2   0.0253   -533.52     0.00     -22.36     0.17
     3   0.8170   8092.09    -0.13    -182.57     0.04
     4   0.8170   8092.01    -0.06    -182.38     0.21
     5   0.8171   8090.08     0.07    -182.46     0.03
     6   0.8172   8088.25     0.15    -182.39     0.01
     7   0.8800   6870.24     0.10    -137.75    -0.00
     8   0.8801   6866.74    -0.11    -137.97    -0.26
     9   0.9755   4583.82    -0.36    -142.69     0.20
    10   0.9756   4583.54     0.06    -142.81     0.10
    11   0.9756   4583.27    -0.07    -142.93    -0.02
    12   0.9756   4582.24     0.29    -142.83     0.12
    13   0.9757   4580.94    -0.18    -142.85     0.13
    14   0.9757   4579.86    -0.02    -142.99     0.02
    15   0.9785   4514.58     0.03    -144.79    -0.25
    16   0.9785   4514.58     0.17    -144.79    -0.25
    17   0.9785   4513.03    -0.02    -144.60    -0.01
    18   0.9786   4512.22    -0.01    -144.62    -0.01
    19   0.9786   4511.10     0.10    -144.67    -0.03

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.

19GT184    quality flag:2

Type:      CLASSICAL   9:5EEEE CLASSICAL

axisobj        43.805    44.374    43.778
ecceobj         0.067     0.133     0.066
incobj          3.981     3.984     3.981
qmin           40.273    38.126    40.252
qmax           47.905    51.411    47.894
amean          43.984    44.554    43.952
amin           43.643    44.131    43.608
amax           44.352    45.006    44.315
emean           0.065     0.129     0.065
emin            0.048     0.115     0.048
emax            0.081     0.142     0.081
imean           2.594     2.652     2.597
imin            1.823     1.836     1.830
imax            3.282     3.334     3.283
excite_mean     0.079     0.137     0.080
fracstop        1.000     1.000     1.000
cjmean          3.094     3.085     3.093

libcent 0      -180.0     182.2    -180.0
libamp  0      -180.0     152.6    -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       180.4     176.2     178.0
kozaiamp        180.0     180.0     180.0