Orbit Fit and Astrometric record for 22LW16

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: 22LW16    
# Created Tue Apr  1 01:11:30 2025
# Orbit generated from Bernstein formalism
# Fitting     15 observations of     15
# Arc:   1.27y
# First observation: 2022/06/02
#  Last observation: 2023/09/10
Preliminary a, adot, b, bdot, g, gdot:
   0.000001   0.023788  -0.000000  -0.000446   0.024274   0.000000
# Chi-squared of fit:     0.33 DOF:     24 RMS:  0.03
# Min/Max residuals:    -0.05    0.06
# Exact a, adot, b, bdot, g, gdot:
  1.547704E-05  2.364375E-02 -2.945862E-07 -4.479776E-04  2.415606E-02 -3.891715E-03
# Covariance matrix:
  2.5842E-13 -6.3476E-13  4.4722E-15 -2.1604E-13  9.7717E-13  3.0530E-10
 -6.3476E-13  5.1949E-10 -2.1726E-12  8.7697E-11 -8.5822E-11 -1.2159E-07
  4.4722E-15 -2.1726E-12  1.7849E-13 -5.0753E-13  3.8323E-13  5.1385E-10
 -2.1604E-13  8.7697E-11 -5.0753E-13  1.5271E-11 -1.5828E-11 -2.0817E-08
  9.7717E-13 -8.5822E-11  3.8323E-13 -1.5828E-11  2.3223E-11  2.2003E-08
  3.0530E-10 -1.2159E-07  5.1385E-10 -2.0817E-08  2.2003E-08  2.8874E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.091240  -73.042914    0.595013    0.015395   -0.822373  2459732.944521
# Heliocentric elements and errors
Epoch:              2459730.5000  =  2022/05/31
Mean Anomaly:          298.00629 +/-    11.075
Argument of Peri:      217.90648 +/-    10.064
Long of Asc Node:      151.04210 +/-     0.066
Inclination:             1.51598 +/-     0.002
Eccentricity:         0.18736771 +/-    0.2301
Semi-Major Axis:     44.79304327 +/-    3.8357
Time of Perihelion: 2478586.9265 +/-    2341.5
Perihelion:          36.40027339 +/-   10.7677
Aphelion:            53.18581315 +/-   11.2681
Period (y)              299.7948 +/-     38.51
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           11.75194117 +/-    0.0024
Ecliptic Y          -40.55260576 +/-    0.0079
Ecliptic Z            0.78846153 +/-    0.0002
Ecliptic XDOT         0.00243668 +/-    0.0002
Ecliptic YDOT         0.00121148 +/-    0.0006
Ecliptic ZDOT        -0.00005928 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.22846939 +/-    0.0076
Geocenter to KBO     41.39747492 +/-    0.0083
# Hcoef: 10.19

The following table shows the complete astrometric record for 22LW16. 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 (22LW16) followed by the observatory code and reference code for the source of the astrometry.

2022 06  02.44372  19 12 56.778  -21 16 51.35  26.4r 22LW16    266  C~6Ipc      
2022 06  02.53086  19 12 56.429  -21 16 51.90  26.4r 22LW16    266  C~6Ipc      
2022 06  02.61096  19 12 56.107  -21 16 52.39  26.4r 22LW16    266  C~6Ipc      
2022 06  03.44086  19 12 52.839  -21 16 57.55  26.4r 22LW16    266  C~6Ipc      
2022 06  03.52767  19 12 52.486  -21 16 58.11  26.4r 22LW16    266  C~6Ipc      
2022 06  03.61505  19 12 52.130  -21 16 58.66  26.4r 22LW16    266  C~6Ipc      
2022 06  29.45230  19 10 53.850  -21 20 14.15  26.3r 22LW16    266  C~6Ipc      
2022 06  29.52093  19 10 53.502  -21 20 14.73  26.3r 22LW16    266  C~6Ipc      
2022 06  29.58817  19 10 53.161  -21 20 15.28  26.3r 22LW16    266  C~6Ipc      
2023 09  09.22891  19 11 44.947  -21 21 23.17        22LW16    266  C~8ecH      
2023 09  09.32430  19 11 44.745  -21 21 23.65        22LW16    266  C~8ecH      
2023 09  09.41985  19 11 44.544  -21 21 24.11        22LW16    266  C~8ecH      
2023 09  10.22905  19 11 42.948  -21 21 28.34        22LW16    266  C~8ecH      
2023 09  10.32490  19 11 42.753  -21 21 28.81        22LW16    266  C~8ecH      
2023 09  10.42059  19 11 42.561  -21 21 29.26        22LW16    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     0.00       0.00     0.00
     2   0.0002     -4.91     0.00       0.06     0.00
     3   0.0005     -9.44    -0.00       0.14    -0.00
     4   0.0027    -55.40    -0.00       0.70     0.02
     5   0.0030    -60.36     0.00       0.76     0.02
     6   0.0032    -65.37    -0.00       0.83     0.01
     7   0.0739  -1729.80    -0.00       9.85    -0.02
     8   0.0741  -1734.70     0.00       9.86    -0.02
     9   0.0743  -1739.49    -0.00       9.89    -0.02
    10   1.2698  -1029.64    -0.01    -145.71     0.05
    11   1.2700  -1032.50     0.01    -145.84     0.06
    12   1.2703  -1035.34     0.01    -145.96     0.06
    13   1.2725  -1057.99    -0.01    -147.42    -0.05
    14   1.2728  -1060.75    -0.00    -147.55    -0.05
    15   1.2730  -1063.47     0.00    -147.67    -0.05

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.

22LW16    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0