Orbit Fit and Astrometric record for 22LA17

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: 22LA17    
# Created Tue Apr  1 01:11:30 2025
# Orbit generated from Bernstein formalism
# Fitting     15 observations of     15
# Arc:   1.27y
# First observation: 2022/06/03
#  Last observation: 2023/09/10
Preliminary a, adot, b, bdot, g, gdot:
   0.000000   0.024829  -0.000000  -0.000783   0.024512   0.000000
# Chi-squared of fit:     0.57 DOF:     24 RMS:  0.03
# Min/Max residuals:    -0.05    0.08
# Exact a, adot, b, bdot, g, gdot:
  1.591504E-05  2.468440E-02 -2.977259E-07 -7.887516E-04  2.440087E-02 -1.433990E-03
# Covariance matrix:
  4.9371E-13  1.0251E-12 -6.0355E-17 -6.9396E-14  1.4703E-12  6.6445E-11
  1.0251E-12  1.9562E-10 -3.7759E-12  8.1103E-11 -6.0313E-11 -6.8175E-08
 -6.0355E-17 -3.7759E-12  2.5020E-13 -1.7540E-12  1.2988E-12  1.3523E-09
 -6.9396E-14  8.1103E-11 -1.7540E-12  3.4940E-11 -2.8313E-11 -2.9154E-08
  1.4703E-12 -6.0313E-11  1.2988E-12 -2.8313E-11  2.9408E-11  2.3847E-08
  6.6445E-11 -6.8175E-08  1.3523E-09 -2.9154E-08  2.3847E-08  2.4519E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.188897  -72.630182    0.587205    0.016913   -0.827937  2459733.941661
# Heliocentric elements and errors
Epoch:              2459730.5000  =  2022/05/31
Mean Anomaly:          325.53061 +/-    56.254
Argument of Peri:      190.45182 +/-    77.885
Long of Asc Node:      139.29262 +/-     0.072
Inclination:             2.15517 +/-     0.004
Eccentricity:         0.11869753 +/-    0.1458
Semi-Major Axis:     46.08727326 +/-    1.4500
Time of Perihelion: 2470672.6095 +/-   17850.1
Perihelion:          40.61682785 +/-    6.8419
Aphelion:            51.55771867 +/-    6.9145
Period (y)              312.8814 +/-     14.77
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           11.92848942 +/-    0.0027
Ecliptic Y          -40.07230736 +/-    0.0087
Ecliptic Z            0.85038892 +/-    0.0002
Ecliptic XDOT         0.00259761 +/-    0.0002
Ecliptic YDOT         0.00098763 +/-    0.0005
Ecliptic ZDOT        -0.00009193 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.81867810 +/-    0.0084
Geocenter to KBO     40.98213871 +/-    0.0091
# Hcoef:  9.93

The following table shows the complete astrometric record for 22LA17. 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 (22LA17) followed by the observatory code and reference code for the source of the astrometry.

2022 06  03.44086  19 14 38.997  -21 07 55.54  26.1r 22LA17    266  C~6Ipc      
2022 06  03.52767  19 14 38.645  -21 07 56.13  26.1r 22LA17    266  C~6Ipc      
2022 06  03.61505  19 14 38.290  -21 07 56.69  26.1r 22LA17    266  C~6Ipc      
2022 06  29.45230  19 12 40.315  -21 11 19.89  26.0r 22LA17    266  C~6Ipc      
2022 06  29.51813  19 12 39.981  -21 11 20.47  26.0r 22LA17    266  C~6Ipc      
2022 06  29.58257  19 12 39.656  -21 11 21.02  26.0r 22LA17    266  C~6Ipc      
2022 06  30.45132  19 12 35.326  -21 11 28.67  26.0r 22LA17    266  C~6Ipc      
2022 06  30.51894  19 12 34.982  -21 11 29.27  26.0r 22LA17    266  C~6Ipc      
2022 06  30.58528  19 12 34.646  -21 11 29.84  26.0r 22LA17    266  C~6Ipc      
2023 09  09.22891  19 13 45.530  -21 13 29.35        22LA17    266  C~8ecH      
2023 09  09.32430  19 13 45.326  -21 13 29.87        22LA17    266  C~8ecH      
2023 09  09.41985  19 13 45.123  -21 13 30.38        22LA17    266  C~8ecH      
2023 09  10.22905  19 13 43.514  -21 13 34.82        22LA17    266  C~8ecH      
2023 09  10.32490  19 13 43.316  -21 13 35.33        22LA17    266  C~8ecH      
2023 09  10.42059  19 13 43.122  -21 13 35.82        22LA17    266  C~8ecH      

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    -0.04
     2   0.0002     -4.96     0.00       0.04    -0.05
     3   0.0005     -9.96    -0.01       0.12    -0.05
     4   0.0712  -1672.75    -0.04       6.07    -0.02
     5   0.0714  -1677.46    -0.04       6.08    -0.02
     6   0.0716  -1682.03    -0.01       6.10    -0.02
     7   0.0740  -1743.08     0.02       6.02     0.08
     8   0.0741  -1747.93     0.03       6.03     0.07
     9   0.0743  -1752.66     0.04       6.04     0.08
    10   1.2670   -784.09    -0.03    -236.44    -0.01
    11   1.2673   -786.98    -0.01    -236.59    -0.00
    12   1.2676   -789.86    -0.02    -236.74    -0.01
    13   1.2698   -812.74     0.03    -238.31     0.00
    14   1.2700   -815.55     0.02    -238.47     0.01
    15   1.2703   -818.31     0.02    -238.62     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.

22LA17    quality flag:1

Type:      CLASSICAL  CENTAURR CLASSICAL

axisobj        45.633    67.610    45.608
ecceobj         0.114     0.614     0.111
incobj          2.157     2.142     2.157
qmin           39.923    25.858    40.027
qmax           52.177   114.013    51.965
amean          45.870    68.408    45.846
amin           45.489    67.485    45.466
amax           46.288    70.341    46.267
emean           0.113     0.614     0.110
emin            0.099     0.607     0.096
emax            0.127     0.623     0.124
imean           1.733     1.154     1.726
imin            1.139     1.128     1.139
imax            2.254     1.175     2.246
excite_mean     0.117     0.615     0.114
fracstop        1.000     0.003     1.000
cjmean          3.108     2.819     3.108

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       180.4     236.4     179.5
kozaiamp        180.0       1.6     179.9