Orbit Fit and Astrometric record for 22LO17

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: 22LO17    
# Created Wed Dec 25 02:11:18 2024
# Orbit generated from Bernstein formalism
# Fitting     21 observations of     21
# Arc:   2.01y
# First observation: 2021/09/06
#  Last observation: 2023/09/10
Preliminary a, adot, b, bdot, g, gdot:
   0.000034   0.019674  -0.000005  -0.000746   0.022148   0.000000
# Chi-squared of fit:     0.39 DOF:     36 RMS:  0.02
# Min/Max residuals:    -0.05    0.04
# Exact a, adot, b, bdot, g, gdot:
  1.423080E-05  1.968108E-02 -3.690199E-07 -7.477156E-04  2.186815E-02 -3.263856E-04
# Covariance matrix:
  4.8802E-13 -8.5967E-13 -9.9434E-15  2.7126E-14 -2.7056E-13 -1.5714E-11
 -8.5967E-13  2.9406E-11  5.2773E-13 -1.3073E-12  1.9813E-12  7.4449E-10
 -9.9434E-15  5.2773E-13  2.3395E-13 -1.7668E-13  3.3209E-14  1.3456E-11
  2.7126E-14 -1.3073E-12 -1.7668E-13  2.0940E-13 -8.4517E-14 -3.3308E-11
 -2.7056E-13  1.9813E-12  3.3209E-14 -8.4517E-14  3.3535E-13  4.8373E-11
 -1.5714E-11  7.4449E-10  1.3456E-11 -3.3308E-11  4.8373E-11  1.8967E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.844238  -75.139125   -0.854592    0.007434   -0.517402  2459463.733371
# Heliocentric elements and errors
Epoch:              2459460.5000  =  2021/09/03
Mean Anomaly:          180.62866 +/-     8.671
Argument of Peri:      338.52237 +/-     8.682
Long of Asc Node:      126.80423 +/-     0.010
Inclination:             2.34089 +/-     0.001
Eccentricity:         0.04401250 +/-    0.0003
Semi-Major Axis:     44.31018744 +/-    0.0093
Time of Perihelion: 2513139.4918 +/-    2594.7
Perihelion:          42.35998541 +/-    0.0161
Aphelion:            46.26038948 +/-    0.0166
Period (y)              294.9603 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           12.69432856 +/-    0.0003
Ecliptic Y          -44.47935867 +/-    0.0012
Ecliptic Z            0.67379439 +/-    0.0000
Ecliptic XDOT         0.00237626 +/-    0.0000
Ecliptic YDOT         0.00067796 +/-    0.0000
Ecliptic ZDOT        -0.00009438 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.26027804 +/-    0.0011
Geocenter to KBO     45.72860648 +/-    0.0012
# Hcoef:  7.85

The following table shows the complete astrometric record for 22LO17. 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 (22LO17) followed by the observatory code and reference code for the source of the astrometry.

2021 09  06.23257  19 04 07.231  -21 46 18.74  25.1r 22LO17    266  C~7umS      
2021 09  06.31280  19 04 07.066  -21 46 19.10  25.1r 22LO17    266  C~7umS      
2021 09  06.39351  19 04 06.901  -21 46 19.44  25.1r 22LO17    266  C~7umS      
2022 06  02.44372  19 15 21.438  -21 29 06.99  25.1r 22LO17    266  C~6Ipd      
2022 06  02.53086  19 15 21.117  -21 29 07.55  25.1r 22LO17    266  C~6Ipd      
2022 06  02.61096  19 15 20.820  -21 29 08.05  25.1r 22LO17    266  C~6Ipd      
2022 06  03.44086  19 15 17.810  -21 29 13.35  24.9r 22LO17    266  C~6Ipd      
2022 06  03.52767  19 15 17.485  -21 29 13.92  24.9r 22LO17    266  C~6Ipd      
2022 06  03.61505  19 15 17.157  -21 29 14.47  24.9r 22LO17    266  C~6Ipd      
2022 06  29.45230  19 13 28.124  -21 32 29.43  24.8r 22LO17    266  C~6Ipd      
2022 06  29.51672  19 13 27.822  -21 32 29.96  24.8r 22LO17    266  C~6Ipd      
2022 06  29.58117  19 13 27.521  -21 32 30.48  24.8r 22LO17    266  C~6Ipd      
2022 06  30.45132  19 13 23.519  -21 32 37.80  25.0r 22LO17    266  C~6Ipd      
2022 06  30.51752  19 13 23.208  -21 32 38.35  25.0r 22LO17    266  C~6Ipd      
2022 06  30.58389  19 13 22.897  -21 32 38.89  25.0r 22LO17    266  C~6Ipd      
2023 09  09.22891  19 13 44.049  -21 35 40.82  23.2V 22LO17    266  C~7umS      
2023 09  09.32430  19 13 43.854  -21 35 41.27  23.2V 22LO17    266  C~7umS      
2023 09  09.41985  19 13 43.662  -21 35 41.70  23.2V 22LO17    266  C~7umS      
2023 09  10.22905  19 13 42.127  -21 35 45.61  23.3V 22LO17    266  C~7umS      
2023 09  10.32490  19 13 41.939  -21 35 46.05  23.3V 22LO17    266  C~7umS      
2023 09  10.42059  19 13 41.754  -21 35 46.46  23.3V 22LO17    266  C~7umS      

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    -0.04
     2   0.0002     -2.32     0.00      -0.11    -0.04
     3   0.0004     -4.65    -0.01      -0.19    -0.04
     4   0.7371   9463.55    -0.01     -92.99     0.01
     5   0.7373   9459.03     0.00     -92.97     0.01
     6   0.7375   9454.84    -0.01     -92.94     0.01
     7   0.7398   9412.41    -0.00     -92.83    -0.01
     8   0.7400   9407.83    -0.00     -92.82    -0.01
     9   0.7403   9403.21    -0.00     -92.78    -0.01
    10   0.8110   7866.53    -0.01     -94.07     0.03
    11   0.8112   7862.28    -0.01     -94.07     0.04
    12   0.8114   7858.04    -0.01     -94.06     0.04
    13   0.8137   7801.64     0.02     -94.36     0.03
    14   0.8139   7797.26     0.02     -94.37     0.03
    15   0.8141   7792.89     0.03     -94.36     0.03
    16   2.0068   8063.30     0.01    -311.90     0.02
    17   2.0071   8060.55     0.01    -312.01     0.02
    18   2.0074   8057.83     0.01    -312.10     0.02
    19   2.0096   8036.07    -0.01    -313.30    -0.05
    20   2.0098   8033.41    -0.01    -313.40    -0.05
    21   2.0101   8030.79    -0.02    -313.49    -0.04

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.

22LO17    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.859    43.939    43.804
ecceobj         0.053     0.052     0.059
incobj          2.343     2.344     2.342
qmin           40.694    40.841    40.324
qmax           47.716    47.711    47.923
amean          44.083    44.169    44.023
amin           43.733    43.819    43.670
amax           44.454    44.530    44.398
emean           0.058     0.056     0.064
emin            0.042     0.040     0.048
emax            0.074     0.072     0.080
imean           1.509     1.459     1.575
imin            0.804     0.774     0.841
imax            2.164     2.112     2.232
excite_mean     0.064     0.062     0.070
fracstop        1.000     1.000     1.000
cjmean          3.098     3.099     3.096

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       188.7     193.6     185.4
kozaiamp        179.9     180.0     180.0