Orbit Fit and Astrometric record for 19GE185

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: 19GE185   
# Created Tue Apr  1 01:11:13 2025
# Orbit generated from Bernstein formalism
# Fitting     16 observations of     16
# Arc:   2.15y
# First observation: 2017/04/01
#  Last observation: 2019/05/28
Preliminary a, adot, b, bdot, g, gdot:
   0.000080   0.017023   0.000001   0.008502   0.020282   0.000000
# Chi-squared of fit:     2.78 DOF:     26 RMS:  0.07
# Min/Max residuals:    -0.16    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.349328E-05  1.674643E-02  6.574138E-06  8.349012E-03  1.988544E-02 -9.531395E-03
# Covariance matrix:
  1.3144E-12  2.2092E-12 -7.5567E-14  1.5078E-12  2.9879E-12  8.4136E-11
  2.2092E-12  1.2059E-11 -3.4785E-13  6.9492E-12  1.3614E-11  3.8787E-10
 -7.5567E-14 -3.4785E-13  7.6253E-13 -5.7053E-13 -3.9937E-13 -1.1380E-11
  1.5078E-12  6.9492E-12 -5.7053E-13  4.2773E-12  7.9557E-12  2.2744E-10
  2.9879E-12  1.3614E-11 -3.9937E-13  7.9557E-12  1.6004E-11  4.4378E-10
  8.4136E-11  3.8787E-10 -1.1380E-11  2.2744E-10  4.4378E-10  1.2696E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
    9.080727 -158.956745    0.166571    0.155011   -0.969094  2457844.915352
# Heliocentric elements and errors
Epoch:              2457840.5000  =  2017/03/28
Mean Anomaly:          341.47396 +/-     0.388
Argument of Peri:       95.09178 +/-     0.155
Long of Asc Node:      183.54852 +/-     0.001
Inclination:            27.77633 +/-     0.002
Eccentricity:         0.61014816 +/-    0.0069
Semi-Major Axis:     93.98268133 +/-    1.2981
Time of Perihelion: 2474966.2739 +/-      50.6
Perihelion:          36.63932125 +/-    0.8259
Aphelion:           151.32604142 +/-    2.1896
Period (y)              911.1292 +/-     18.88
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -47.32467906 +/-    0.0093
Ecliptic Y          -18.03284185 +/-    0.0036
Ecliptic Z            7.93711426 +/-    0.0016
Ecliptic XDOT         0.00221022 +/-    0.0000
Ecliptic YDOT        -0.00162801 +/-    0.0000
Ecliptic ZDOT         0.00092790 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   51.26213433 +/-    0.0087
Geocenter to KBO     50.28805098 +/-    0.0101
# Hcoef:  7.60

The following table shows the complete astrometric record for 19GE185. 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 (19GE185) followed by the observatory code and reference code for the source of the astrometry.

2017 04  01.414551 13 31 20.66   +00 12 55.9         19GE185   T09  C~870j      
2017 04  28.381476 13 29 43.03   +00 24 42.2         19GE185   T09  C~870j      
2019 03  10.543060 13 41 16.83   +00 12 35.0         19GE185   T09  C~870j      
2019 03  10.549367 13 41 16.82   +00 12 35.0         19GE185   T09  C~870j      
2019 04  07.43675  13 39 44.82   +00 26 14.5   24.3i 19GE185   T09  C~83GG      
2019 04  07.48019  13 39 44.65   +00 26 15.7   24.7i 19GE185   T09  C~83GG      
2019 04  07.49377  13 39 44.61   +00 26 16.0   24.9i 19GE185   T09  C~83GG      
2019 04  07.53931  13 39 44.43   +00 26 17.4   24.6i 19GE185   T09  C~83GG      
2019 04  08.48181  13 39 40.98   +00 26 44.1   23.6y 19GE185   T09  C~83GG      
2019 04  08.52496  13 39 40.81   +00 26 45.4   24.7y 19GE185   T09  C~83GG      
2019 04  08.53840  13 39 40.77   +00 26 45.6   24.1y 19GE185   T09  C~83GG      
2019 05  28.28253  13 36 50.48   +00 44 24.3   24.6z 19GE185   T09  C~83GG      
2019 05  28.29599  13 36 50.43   +00 44 24.3   24.2z 19GE185   T09  C~83GG      
2019 05  28.32044  13 36 50.37   +00 44 24.5   24.2z 19GE185   T09  C~83GG      
2019 05  28.37739  13 36 50.22   +00 44 25.3   24.1z 19GE185   T09  C~83GG      
2019 05  28.41488  13 36 50.12   +00 44 25.7   24.5z 19GE185   T09  C~83GG      

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    -0.04       0.00     0.01
     2   0.0738  -1622.01     0.04     112.18    -0.02
     3   1.9388   8316.09    -0.01    3303.25     0.09
     4   1.9388   8315.95     0.17    3303.20    -0.04
     5   2.0151   6728.05    -0.00    3551.27     0.07
     6   2.0152   6725.23    -0.10    3551.43    -0.01
     7   2.0153   6724.57     0.08    3551.49    -0.03
     8   2.0154   6721.54    -0.10    3551.78     0.01
     9   2.0180   6663.50    -0.01    3557.34     0.02
    10   2.0181   6660.65    -0.16    3557.60     0.04
    11   2.0181   6660.02     0.05    3557.56    -0.07
    12   2.1543   3893.04     0.02    3591.17     0.14
    13   2.1544   3892.34    -0.10    3590.89    -0.09
    14   2.1544   3891.43     0.02    3590.74    -0.13
    15   2.1546   3889.05     0.05    3590.65     0.02
    16   2.1547   3887.51     0.09    3590.46    -0.01

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.

19GE185    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        91.525    95.075    88.335
ecceobj         0.603     0.622     0.584
incobj         27.943    27.939    27.946
qmin           35.701    35.291    36.108
qmax          153.380   161.218   145.864
amean          92.674    96.193    89.388
amin           91.271    94.555    87.865
amax           95.040    98.722    91.667
emean           0.602     0.616     0.578
emin            0.594     0.600     0.563
emax            0.615     0.634     0.596
imean          27.852    28.396    28.371
imin           27.380    27.366    27.379
imax           28.201    29.545    29.288
excite_mean     0.762     0.778     0.748
fracstop        1.000     1.000     1.000
cjmean          2.801     2.789     2.812

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       157.1     175.3     178.1
kozaiamp         58.8      80.6      81.7