Orbit Fit and Astrometric record for 19GU184

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: 19GU184   
# Created Tue Apr  1 01:11:13 2025
# Orbit generated from Bernstein formalism
# Fitting     21 observations of     21
# Arc:   1.14y
# First observation: 2018/02/11
#  Last observation: 2019/04/05
Preliminary a, adot, b, bdot, g, gdot:
  -0.000057   0.024733  -0.000001   0.000433   0.024588   0.000000
# Chi-squared of fit:    11.17 DOF:     36 RMS:  0.13
# Min/Max residuals:    -0.40    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.586624E-05  2.469454E-02  3.904576E-07  4.306052E-04  2.463510E-02  1.467698E-03
# Covariance matrix:
  1.4576E-12  5.7948E-13 -9.3574E-15  5.1315E-14  1.6792E-12  8.2494E-11
  5.7948E-13  2.4056E-12 -1.5107E-14  8.3242E-14  2.3053E-12  1.2984E-10
 -9.3574E-15 -1.5107E-14  6.0905E-13 -5.6843E-13 -1.8853E-14 -1.0848E-12
  5.1315E-14  8.3242E-14 -5.6843E-13  6.0163E-13  1.0344E-13  5.9775E-12
  1.6792E-12  2.3053E-12 -1.8853E-14  1.0344E-13  3.3273E-12  1.6575E-10
  8.2494E-11  1.2984E-10 -1.0848E-12  5.9775E-12  1.6575E-10  9.3256E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.044748  179.959736    0.605077    0.041715   -0.782096  2458161.155206
# Heliocentric elements and errors
Epoch:              2458160.5000  =  2018/02/11
Mean Anomaly:           32.55398 +/-     2.088
Argument of Peri:       33.20111 +/-     2.529
Long of Asc Node:      108.45500 +/-     0.031
Inclination:             3.16471 +/-     0.001
Eccentricity:         0.07405575 +/-    0.0025
Semi-Major Axis:     44.05323037 +/-    0.0153
Time of Perihelion: 2448502.9567 +/-     619.5
Perihelion:          40.79083531 +/-    0.1121
Aphelion:            47.31562543 +/-    0.1124
Period (y)              292.3983 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.31951316 +/-    0.0030
Ecliptic Y            0.62713544 +/-    0.0001
Ecliptic Z            2.15612082 +/-    0.0002
Ecliptic XDOT        -0.00015613 +/-    0.0000
Ecliptic YDOT        -0.00274906 +/-    0.0000
Ecliptic ZDOT         0.00005630 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.38048240 +/-    0.0030
Geocenter to KBO     40.59249092 +/-    0.0030
# Hcoef:  8.58

The following table shows the complete astrometric record for 19GU184. 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 (19GU184) followed by the observatory code and reference code for the source of the astrometry.

2018 02  11.654405 12 04 42.04   +02 48 33.5         19GU184   T09  C~870j      
2018 04  24.365505 11 59 42.93   +03 21 29.2         19GU184   T09  C~870j      
2018 04  24.409486 11 59 42.76   +03 21 30.2         19GU184   T09  C~870j      
2019 02  05.53446  12 10 15.47   +02 13 34.7   24.0i 19GU184   T09  C~83GF      
2019 02  05.58442  12 10 15.34   +02 13 35.8   24.2i 19GU184   T09  C~83GF      
2019 02  05.62497  12 10 15.21   +02 13 37.0   23.8i 19GU184   T09  C~83GF      
2019 02  05.66520  12 10 15.10   +02 13 37.7   23.7i 19GU184   T09  C~83GF      
2019 02  28.557380 12 08 54.43   +02 23 33.6         19GU184   T09  C~870j      
2019 02  28.607902 12 08 54.23   +02 23 34.7         19GU184   T09  C~870j      
2019 03  03.619719 12 08 41.73   +02 25 02.6         19GU184   T09  C~870j      
2019 03  03.622400 12 08 41.73   +02 25 02.7         19GU184   T09  C~870j      
2019 04  04.44671  12 06 20.27   +02 40 40.2   25.5g 19GU184   T09  C~83GF      
2019 04  04.45724  12 06 20.24   +02 40 40.4   25.6g 19GU184   T09  C~83GF      
2019 04  04.48040  12 06 20.13   +02 40 40.7   25.4g 19GU184   T09  C~83GF      
2019 04  04.49094  12 06 20.08   +02 40 41.2   25.7g 19GU184   T09  C~83GF      
2019 04  04.50980  12 06 20.00   +02 40 41.7   25.5g 19GU184   T09  C~83GF      
2019 04  04.51189  12 06 19.96   +02 40 42.1   26.0g 19GU184   T09  C~83GF      
2019 04  05.52031  12 06 15.55   +02 41 09.8   24.6r 19GU184   T09  C~83GF      
2019 04  05.54335  12 06 15.45   +02 41 10.3   24.4r 19GU184   T09  C~83GF      
2019 04  05.55382  12 06 15.40   +02 41 10.8   24.6r 19GU184   T09  C~83GF      
2019 04  05.57268  12 06 15.33   +02 41 11.1   24.5r 19GU184   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    -0.00       0.00    -0.02
     2   0.1963  -4897.25     0.07      30.80     0.01
     3   0.1965  -4899.99    -0.07      30.71     0.04
     4   0.9826   5420.32    -0.05      67.76    -0.12
     5   0.9827   5418.10     0.17      67.99    -0.04
     6   0.9828   5415.83    -0.12      68.32     0.16
     7   0.9829   5414.04     0.06      68.30     0.02
     8   1.0456   4066.89    -0.20     132.12    -0.05
     9   1.0457   4063.70     0.09     131.93    -0.31
    10   1.0540   3856.78    -0.06     137.78    -0.02
    11   1.0540   3856.74     0.09     137.87     0.07
    12   1.1411   1538.51    -0.11     152.26     0.12
    13   1.1411   1538.01     0.16     152.26     0.14
    14   1.1412   1536.38     0.21     151.88    -0.21
    15   1.1412   1535.50     0.09     152.04    -0.03
    16   1.1413   1534.20     0.16     152.02    -0.03
    17   1.1413   1533.49    -0.40     152.15     0.10
    18   1.1441   1461.84    -0.08     151.22     0.07
    19   1.1441   1460.27    -0.00     151.08    -0.04
    20   1.1441   1459.38    -0.13     151.24     0.13
    21   1.1442   1458.30     0.14     151.10     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.

19GU184    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.736    43.818    43.663
ecceobj         0.071     0.079     0.063
incobj          3.164     3.164     3.163
qmin           39.632    39.323    39.836
qmax           48.405    48.896    47.997
amean          43.890    43.970    43.819
amin           43.541    43.615    43.457
amax           44.255    44.353    44.188
emean           0.076     0.085     0.068
emin            0.058     0.068     0.050
emax            0.094     0.103     0.087
imean           1.769     1.796     1.724
imin            0.970     0.973     0.913
imax            2.461     2.479     2.447
excite_mean     0.083     0.091     0.075
fracstop        1.000     1.000     1.000
cjmean          3.092     3.091     3.092

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       181.3     179.7     185.1
kozaiamp        180.0     179.9     180.0