Orbit Fit and Astrometric record for 19GX184

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: 19GX184   
# Created Tue Apr  1 01:11:13 2025
# Orbit generated from Bernstein formalism
# Fitting     13 observations of     13
# Arc:  57.96d
# First observation: 2019/02/05
#  Last observation: 2019/04/04
Preliminary a, adot, b, bdot, g, gdot:
   0.000002   0.026086  -0.000002   0.001034   0.024946   0.000000
# Chi-squared of fit:     7.60 DOF:     20 RMS:  0.14
# Min/Max residuals:    -0.31    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.733608E-05  2.460524E-02 -6.032346E-08  1.053641E-03  2.454113E-02 -9.707795E-04
# Covariance matrix:
  4.1998E-13  8.9822E-11 -7.4896E-14 -1.6391E-12  1.9582E-11  1.1685E-09
  8.9822E-11  1.5534E-07 -1.1812E-10 -2.9005E-09  3.1395E-08  1.4658E-06
 -7.4896E-14 -1.1812E-10  3.6857E-13  8.3672E-15 -2.3933E-11 -1.1318E-09
 -1.6391E-12 -2.9005E-09  8.3672E-15  8.3131E-11 -5.8543E-10 -2.7101E-08
  1.9582E-11  3.1395E-08 -2.3933E-11 -5.8543E-10  6.3574E-09  2.9969E-07
  1.1685E-09  1.4658E-06 -1.1318E-09 -2.7101E-08  2.9969E-07  1.4868E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.965017 -177.949223    0.715181    0.047593   -0.685702  2458520.055801
# Heliocentric elements and errors
Epoch:              2458520.5000  =  2019/02/06
Mean Anomaly:          319.02085 +/-    70.363
Argument of Peri:      105.01388 +/-    88.400
Long of Asc Node:      124.02059 +/-     0.563
Inclination:             4.64310 +/-     0.030
Eccentricity:         0.08467500 +/-    0.1032
Semi-Major Axis:     44.10859796 +/-    0.3860
Time of Perihelion: 2470700.4019 +/-   20912.7
Perihelion:          40.37370250 +/-    4.5671
Aphelion:            47.84349343 +/-    4.5726
Period (y)              292.9497 +/-      3.85
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.33578449 +/-    0.1320
Ecliptic Y           -0.77275453 +/-    0.0047
Ecliptic Z            2.81759441 +/-    0.0092
Ecliptic XDOT         0.00022237 +/-    0.0004
Ecliptic YDOT        -0.00274074 +/-    0.0001
Ecliptic ZDOT         0.00010957 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.43890765 +/-    0.1317
Geocenter to KBO     40.74791290 +/-    0.1324
# Hcoef:  8.19

The following table shows the complete astrometric record for 19GX184. 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 (19GX184) followed by the observatory code and reference code for the source of the astrometry.

2019 02  05.55500  12 13 50.13   +02 49 20.8   23.5i 19GX184   T09  C~83GG      
2019 02  05.58442  12 13 50.07   +02 49 21.3   24.1i 19GX184   T09  C~83GG      
2019 02  05.60072  12 13 50.02   +02 49 21.5   24.3i 19GX184   T09  C~83GG      
2019 02  05.62764  12 13 49.94   +02 49 22.0   24.0i 19GX184   T09  C~83GG      
2019 03  03.52028  12 12 18.50   +03 01 07.5   23.8z 19GX184   T09  C~83GG      
2019 03  03.52564  12 12 18.47   +03 01 07.6   23.7z 19GX184   T09  C~83GG      
2019 03  03.52832  12 12 18.46   +03 01 07.8   23.9z 19GX184   T09  C~83GG      
2019 03  03.58217  12 12 18.22   +03 01 09.5   23.7z 19GX184   T09  C~83GG      
2019 03  03.62241  12 12 18.08   +03 01 10.7   23.8z 19GX184   T09  C~83GG      
2019 04  04.44950  12 09 57.11   +03 17 02.7   25.3g 19GX184   T09  C~83GG      
2019 04  04.46994  12 09 57.02   +03 17 03.1   25.7g 19GX184   T09  C~83GG      
2019 04  04.49303  12 09 56.92   +03 17 03.9   25.1g 19GX184   T09  C~83GG      
2019 04  04.51189  12 09 56.82   +03 17 04.7   25.4g 19GX184   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    -0.31       0.00     0.15
     2   0.0001     -1.02     0.09       0.10     0.12
     3   0.0001     -1.79     0.11      -0.01    -0.07
     4   0.0002     -3.09     0.11      -0.03    -0.21
     5   0.0711  -1540.54     0.07     102.25    -0.03
     6   0.0711  -1540.99    -0.00     102.16    -0.13
     7   0.0711  -1541.21    -0.03     102.28    -0.01
     8   0.0713  -1545.18    -0.23     102.41    -0.00
     9   0.0714  -1547.59     0.19     102.68     0.17
    10   0.1585  -3863.81     0.02     137.15    -0.01
    11   0.1586  -3865.20     0.11     136.98    -0.16
    12   0.1586  -3866.89     0.10     137.12     0.01
    13   0.1587  -3868.59    -0.22     137.26     0.16

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.

19GX184    quality flag:1

Type:      CLASSICAL  SCATNEAR  SCATNEAR

axisobj        43.837    59.230    42.636
ecceobj         0.077     0.426     0.132
incobj          4.642     4.554     4.689
qmin           40.003    30.854    33.368
qmax           48.288    91.407    52.787
amean          44.029    55.089    42.844
amin           43.684    37.736    42.246
amax           44.417    62.662    43.429
emean           0.072     0.392     0.179
emin            0.056     0.170     0.125
emax            0.088     0.459     0.220
imean           3.309     3.709     6.420
imin            2.542     0.830     1.882
imax            4.029     5.478    12.514
excite_mean     0.093     0.398     0.215
fracstop        1.000     1.000     1.000
cjmean          3.092     3.027     3.031

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       180.7     167.3     177.5
kozaiamp        180.0     179.9     180.0