Orbit Fit and Astrometric record for 19GH185

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: 19GH185   
# Created Tue Apr  1 01:11:13 2025
# Orbit generated from Bernstein formalism
# Fitting     14 observations of     14
# Arc:   4.20y
# First observation: 2015/03/17
#  Last observation: 2019/05/28
Preliminary a, adot, b, bdot, g, gdot:
   0.000027   0.035507  -0.000000  -0.002541   0.029427   0.000000
# Chi-squared of fit:     7.65 DOF:     22 RMS:  0.13
# Min/Max residuals:    -0.36    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.981539E-05  3.494897E-02 -1.402599E-06 -2.526229E-03  2.804274E-02 -2.499484E-03
# Covariance matrix:
  7.3220E-13 -6.1291E-13 -1.3209E-14  3.4624E-14 -3.1367E-13 -3.0280E-12
 -6.1291E-13  1.7505E-12  4.6627E-14 -1.2360E-13  1.4179E-12  1.0948E-11
 -1.3209E-14  4.6627E-14  5.9853E-13 -1.5571E-13  3.4789E-14  3.0355E-13
  3.4624E-14 -1.2360E-13 -1.5571E-13  5.5989E-14 -9.4828E-14 -8.0210E-13
 -3.1367E-13  1.4179E-12  3.4789E-14 -9.4828E-14  1.6461E-12  8.6590E-12
 -3.0280E-12  1.0948E-11  3.0355E-13 -8.0210E-13  8.6590E-12  7.0795E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.604236 -166.940189    0.284161    0.142296   -0.939593  2457099.036332
# Heliocentric elements and errors
Epoch:              2457090.5000  =  2015/03/09
Mean Anomaly:          355.41560 +/-     0.013
Argument of Peri:      129.83756 +/-     0.042
Long of Asc Node:       76.47179 +/-     0.002
Inclination:             9.31943 +/-     0.000
Eccentricity:         0.46399438 +/-    0.0002
Semi-Major Axis:     67.64700462 +/-    0.0216
Time of Perihelion: 2459678.4226 +/-       7.5
Perihelion:          36.25917454 +/-    0.0163
Aphelion:            99.03483470 +/-    0.0337
Period (y)              556.3922 +/-      0.27
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.33944857 +/-    0.0016
Ecliptic Y           -7.90547643 +/-    0.0004
Ecliptic Z            5.33498581 +/-    0.0002
Ecliptic XDOT         0.00096670 +/-    0.0000
Ecliptic YDOT        -0.00328344 +/-    0.0000
Ecliptic ZDOT        -0.00028028 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.60376014 +/-    0.0015
Geocenter to KBO     35.65985301 +/-    0.0016
# Hcoef:  8.74

The following table shows the complete astrometric record for 19GH185. 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 (19GH185) followed by the observatory code and reference code for the source of the astrometry.

2015 03  17.535554 13 01 25.35   +02 46 25.0         19GH185   T09  C~85KE      
2015 03  17.607820 13 01 25.02   +02 46 27.4         19GH185   T09  C~85KE      
2017 04  26.358758 13 12 34.97   +01 15 24.3         19GH185   T09  C~85KE      
2017 04  26.388715 13 12 34.83   +01 15 25.0         19GH185   T09  C~85KE      
2019 03  11.593533 13 30 44.48   -00 57 46.9         19GH185   T09  C~85KE      
2019 03  11.627155 13 30 44.34   -00 57 46.2         19GH185   T09  C~85KE      
2019 04  07.42061  13 28 42.19   -00 44 22.3   23.5i 19GH185   T09  C~85KE      
2019 04  07.46130  13 28 41.99   -00 44 21.1   23.5i 19GH185   T09  C~85KE      
2019 04  07.51785  13 28 41.69   -00 44 19.4   24.1i 19GH185   T09  C~85KE      
2019 05  03.445822 13 26 34.15   -00 33 18.1         19GH185   T09  C~85KE      
2019 05  28.27719  13 24 53.75   -00 27 18.9   24.5z 19GH185   T09  C~85KE      
2019 05  28.30153  13 24 53.64   -00 27 18.7   24.6z 19GH185   T09  C~85KE      
2019 05  28.35576  13 24 53.48   -00 27 18.2   23.9z 19GH185   T09  C~85KE      
2019 05  28.39613  13 24 53.35   -00 27 18.0   24.8z 19GH185   T09  C~85KE      

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    -0.02       0.00    -0.00
     2   0.0002     -5.49     0.04       0.29     0.10
     3   2.1104  11382.85    -0.04   -1129.14    -0.10
     4   2.1105  11380.63     0.01   -1129.31    -0.06
     5   3.9837  29739.87     0.10   -2129.05    -0.06
     6   3.9838  29737.61     0.14   -2129.23    -0.36
     7   4.0572  27698.20    -0.10   -2101.47     0.01
     8   4.0573  27694.92    -0.02   -2101.54     0.06
     9   4.0574  27690.02    -0.24   -2101.72     0.03
    10   4.1284  25636.82     0.02   -2238.41    -0.12
    11   4.1964  24087.90     0.16   -2495.60     0.14
    12   4.1965  24086.28    -0.24   -2496.06    -0.01
    13   4.1966  24083.84     0.04   -2496.54     0.21
    14   4.1967  24081.94     0.16   -2497.11     0.15

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.

19GH185    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        66.399    66.447    66.351
ecceobj         0.454     0.454     0.454
incobj          9.319     9.319     9.319
qmin           35.250    35.282    35.387
qmax          101.796   101.106   100.949
amean          67.448    67.120    67.115
amin           66.042    65.993    66.047
amax           69.016    68.534    68.571
emean           0.464     0.460     0.459
emin            0.448     0.447     0.445
emax            0.477     0.476     0.473
imean           7.469     8.185     7.876
imin            6.683     7.575     7.241
imax            8.271     9.087     8.643
excite_mean     0.482     0.482     0.479
fracstop        1.000     1.000     1.000
cjmean          3.075     3.072     3.076

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       193.6     185.2     187.2
kozaiamp        179.9     180.0     179.9