Orbit Fit and Astrometric record for 19AK142

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: 19AK142   
# Created Tue Apr  1 01:11:10 2025
# Orbit generated from Bernstein formalism
# Fitting     14 observations of     14
# Arc:  83.97d
# First observation: 2019/01/11
#  Last observation: 2019/04/05
Preliminary a, adot, b, bdot, g, gdot:
  -0.000005   0.024033  -0.000004  -0.009295   0.025697   0.000000
# Chi-squared of fit:     4.43 DOF:     22 RMS:  0.10
# Min/Max residuals:    -0.22    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.789873E-05  2.978468E-02 -5.381536E-06 -9.046221E-03  2.651824E-02 -5.122286E-03
# Covariance matrix:
  3.7511E-13  1.7042E-11  1.2947E-14  2.7680E-13  3.8053E-12  1.0902E-10
  1.7042E-11  3.8858E-08  2.3857E-11  9.3002E-10  7.1438E-09  6.5784E-08
  1.2947E-14  2.3857E-11  3.6713E-13 -1.0887E-12  4.4266E-12  4.8658E-11
  2.7680E-13  9.3002E-10 -1.0887E-12  3.5201E-11  1.6646E-10  6.1906E-10
  3.8053E-12  7.1438E-09  4.4266E-12  1.6646E-10  1.3236E-09  1.4169E-08
  1.0902E-10  6.5784E-08  4.8658E-11  6.1906E-10  1.4169E-08  5.4521E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   -6.392238  165.096472    0.806112   -0.064038   -0.572401  2458495.042281
# Heliocentric elements and errors
Epoch:              2458490.5000  =  2019/01/07
Mean Anomaly:          345.17176 +/-     1.426
Argument of Peri:      237.94510 +/-     3.929
Long of Asc Node:      324.26770 +/-     0.133
Inclination:            18.18310 +/-     0.110
Eccentricity:         0.41125949 +/-    0.0165
Semi-Major Axis:     61.14321567 +/-    1.0826
Time of Perihelion: 2465683.4649 +/-     665.0
Perihelion:          35.99748817 +/-    1.1948
Aphelion:            86.28894316 +/-    1.8318
Period (y)              478.1131 +/-     12.70
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -36.56336619 +/-    0.0497
Ecliptic Y           10.55742017 +/-    0.0132
Ecliptic Z           -4.19863882 +/-    0.0058
Ecliptic XDOT        -0.00017461 +/-    0.0001
Ecliptic YDOT        -0.00313545 +/-    0.0000
Ecliptic ZDOT        -0.00086949 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.28795418 +/-    0.0476
Geocenter to KBO     37.70989025 +/-    0.0517
# Hcoef:  8.31

The following table shows the complete astrometric record for 19AK142. 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 (19AK142) followed by the observatory code and reference code for the source of the astrometry.

2019 01  11.54148  10 55 14.90   -00 01 38.6   24.1z 19AK142   T09  C~870S      
2019 01  11.58440  10 55 14.78   -00 01 38.5   23.8z 19AK142   T09  C~870S      
2019 01  11.61426  10 55 14.69   -00 01 38.5   23.6z 19AK142   T09  C~870S      
2019 01  11.66816  10 55 14.55   -00 01 38.3   23.9z 19AK142   T09  C~870S      
2019 03  15.34612  10 50 40.15   +00 16 32.5   24.3y 19AK142   T09  C~870S      
2019 03  15.36307  10 50 40.06   +00 16 33.0   24.2y 19AK142   T09  C~870S      
2019 03  15.47337  10 50 39.53   +00 16 35.6   23.7y 19AK142   T09  C~870S      
2019 04  04.38775  10 49 09.76   +00 25 17.5   25.2g 19AK142   T09  C~8HQx      
2019 04  04.39625  10 49 09.73   +00 25 17.5   24.5g 19AK142   T09  C~8HQx      
2019 04  05.40376  10 49 05.69   +00 25 43.0   23.9r 19AK142   T09  C~870S      
2019 04  05.43322  10 49 05.58   +00 25 43.7   24.1r 19AK142   T09  C~870S      
2019 04  05.46680  10 49 05.43   +00 25 44.5   23.9r 19AK142   T09  C~870S      
2019 04  05.47728  10 49 05.39   +00 25 44.7   23.8r 19AK142   T09  C~870S      
2019 04  05.51163  10 49 05.24   +00 25 45.4   24.1r 19AK142   T09  C~870S      

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    -0.03       0.00    -0.00
     2   0.0001     -1.70    -0.01      -0.60     0.01
     3   0.0002     -2.95    -0.06      -1.12    -0.08
     4   0.0003     -4.96     0.09      -1.74     0.07
     5   0.1719  -4224.62    -0.04    -576.95     0.06
     6   0.1720  -4226.06    -0.15    -577.00     0.08
     7   0.1723  -4234.40     0.20    -577.66    -0.12
     8   0.2268  -5678.93    -0.17    -613.42     0.04
     9   0.2268  -5679.35    -0.01    -613.59    -0.13
    10   0.2296  -5745.14     0.01    -613.34     0.12
    11   0.2297  -5746.94     0.17    -613.33     0.15
    12   0.2298  -5749.32    -0.01    -613.46     0.03
    13   0.2298  -5749.96     0.05    -613.50    -0.01
    14   0.2299  -5752.30    -0.05    -613.72    -0.22

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.

19AK142    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        60.689    63.869    57.863
ecceobj         0.405     0.435     0.375
incobj         18.182    17.880    18.496
qmin           35.298    35.286    34.787
qmax           87.761    94.453    82.511
amean          60.840    64.166    57.901
amin           60.126    63.388    57.049
amax           61.838    65.215    58.969
emean           0.402     0.436     0.378
emin            0.384     0.423     0.361
emax            0.420     0.450     0.400
imean          19.808    19.332    19.542
imin           19.169    18.824    18.458
imax           20.751    19.914    20.209
excite_mean     0.526     0.548     0.505
fracstop        1.000     1.000     1.000
cjmean          2.943     2.947     2.939

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       180.6     204.8     181.0
kozaiamp        180.0     179.9     180.0