Orbit Fit and Astrometric record for 22HE1

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: 22HE1     
# Created Wed Dec 25 02:11:16 2024
# Orbit generated from Bernstein formalism
# Fitting     24 observations of     25
# Arc:   4.05y
# First observation: 2019/04/07
#  Last observation: 2023/04/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000007   0.026257  -0.000002   0.000328   0.025732   0.000000
# Chi-squared of fit:    37.25 DOF:     42 RMS:  0.22
# Min/Max residuals:    -0.52    0.46
# Exact a, adot, b, bdot, g, gdot:
  1.664603E-05  2.626127E-02 -1.309711E-06  3.283398E-04  2.559914E-02  8.537418E-04
# Covariance matrix:
  2.3838E-13  1.8834E-13 -6.3596E-17  1.2105E-15  2.1869E-12  8.7473E-13
  1.8834E-13  1.0814E-12 -5.9673E-16  1.0959E-14  4.1762E-12  9.1843E-12
 -6.3596E-17 -5.9673E-16  1.0411E-13 -3.0668E-14 -1.4635E-15 -5.8597E-15
  1.2105E-15  1.0959E-14 -3.0668E-14  2.2024E-14  2.7510E-14  1.0712E-13
  2.1869E-12  4.1762E-12 -1.4635E-15  2.7510E-14  3.6148E-11  2.0977E-11
  8.7473E-13  9.1843E-12 -5.8597E-15  1.0712E-13  2.0977E-11  9.1383E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.273939 -159.307094    0.076856    0.004812   -0.997220  2458580.595011
# Heliocentric elements and errors
Epoch:              2458580.5000  =  2019/04/07
Mean Anomaly:           19.64601 +/-     0.308
Argument of Peri:      357.63062 +/-     0.364
Long of Asc Node:      180.04542 +/-     0.009
Inclination:             0.76069 +/-     0.000
Eccentricity:         0.07732047 +/-    0.0006
Semi-Major Axis:     43.17351749 +/-    0.0419
Time of Perihelion: 2452925.9708 +/-      88.4
Perihelion:          39.83532103 +/-    0.0470
Aphelion:            46.51171395 +/-    0.0525
Period (y)              283.6837 +/-      0.41
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.50159818 +/-    0.0086
Ecliptic Y          -14.09205991 +/-    0.0032
Ecliptic Z            0.18671115 +/-    0.0000
Ecliptic XDOT         0.00091551 +/-    0.0000
Ecliptic YDOT        -0.00266067 +/-    0.0000
Ecliptic ZDOT         0.00003534 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.06233742 +/-    0.0081
Geocenter to KBO     39.06381716 +/-    0.0092
# Hcoef:  6.79

The following table shows the complete astrometric record for 22HE1. 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 (22HE1) followed by the observatory code and reference code for the source of the astrometry.

2019 04  07.09421  13 16 52.34   -07 49 34.6   22.2R 22HE1     W93  C~5Zfx      
2019 04  07.12192  13 16 52.19   -07 49 34.3   22.3R 22HE1     W93  C~5Zfx      
2019 04  07.15000  13 16 52.07   -07 49 33.3   22.3R 22HE1     W93  C~5Zfx      
2019 04  07.17762  13 16 51.92   -07 49 32.5   22.3R 22HE1     W93  C~5Zfx      
2019 04  09.09228  13 16 42.93   -07 48 38.0         22HE1     W93  C~5Zfx      
2019 04  09.12124  13 16 42.78   -07 48 36.9         22HE1     W93  C~5Zfx      
2019 04  09.14931  13 16 42.66   -07 48 36.3         22HE1     W93  C~5Zfx      
2019 04  11.09819  13 16 33.46   -07 47 40.3         22HE1     W93  C~5Zfx      
2019 04  11.12607  13 16 33.29   -07 47 39.4         22HE1     W93  C~5Zfx      
2019 04  11.18539  13 16 33.02   -07 47 37.9   22.7R 22HE1     W93  C~5Zfx      
2019 04  15.08231  13 16 14.65   -07 45 46.3   22.1R 22HE1     W93  C~5Zfx      
2019 04  15.11031  13 16 14.54   -07 45 45.5   21.8R 22HE1     W93  C~5Zfx      
2019 04  15.13843  13 16 14.38   -07 45 44.2   21.7R 22HE1     W93  C~5Zfx      
2019 04  15.16699  13 16 14.23   -07 45 43.7   22.1R 22HE1     W93  C~5Zfx      
2022 04  22.06638  13 32 40.10   -09 19 30.0   23.3R 22HE1     W93  C~5Zfx      
2022 04  22.10890  13 32 39.89   -09 19 29.1   22.6R 22HE1     W93  C~5Zfx      
2022 04  22.13017  13 32 39.78   -09 19 28.9   22.9R 22HE1     W93  C~5Zfx      
2022 04  22.14969  13 32 39.71   -09 19 28.0   22.8R 22HE1     W93  C~5Zfx      
2022 04  24.06779  13 32 30.69   -09 18 35.8   22.5R 22HE1     W93  C~5Zfx      
2022 04  24.08911  13 32 30.58   -09 18 34.8   22.7R 22HE1     W93  C~5Zfx      
2022 04  24.11020  13 32 30.48   -09 18 34.4   22.1R 22HE1     W93  C~5Zfx      
2022 04  24.13133  13 32 30.39   -09 18 33.8   22.4R 22HE1     W93  C~5Zfx      
2023 04  24.188060 13 38 11.098  -09 50 13.70  22.7G 22HE1     G37  C~6hd9      
2023 04  24.256350 13 38 10.742  -09 50 11.33        22HE1     G37  C~6hd9      
2023 04  24.316190 13 38 10.459  -09 50 09.94        22HE1     G37  C~6hd9      

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    -0.09       0.00     0.31
     2   0.0001     -2.18    -0.15      -0.56    -0.24
     3   0.0002     -4.21    -0.02      -0.30     0.02
     4   0.0002     -6.57    -0.27      -0.40    -0.06
     5   0.0055   -150.86     0.31      -0.08    -0.19
     6   0.0055   -153.34     0.05       0.11     0.00
     7   0.0056   -155.22     0.32      -0.01    -0.10
     8   0.0110   -302.96     0.26       0.52     0.01
     9   0.0110   -305.64    -0.28       0.40    -0.09
    10   0.0112   -309.92    -0.00       0.28    -0.20
    11   0.0219   -604.87     0.01       1.08    -0.13
    12   0.0219   -606.68     0.34       1.21     0.01
    13   0.0220   -609.37    -0.20       1.52     0.33
    14   0.0221   -611.63    -0.27       1.14    -0.04
    15   3.0417  15082.26 (  -0.06)    204.95 (   0.68)
    16   3.0418  15079.02    -0.06     204.65     0.40
    17   3.0419  15077.42    -0.03     204.24    -0.00
    18   3.0419  15076.12     0.16     204.70     0.46
    19   3.0472  14932.01     0.11     204.38    -0.04
    20   3.0472  14930.12    -0.16     204.72     0.30
    21   3.0473  14928.58    -0.09     204.55     0.14
    22   3.0473  14927.12     0.05     204.62     0.22
    23   4.0468  20352.07     0.35     271.49    -0.52
    24   4.0470  20346.25    -0.24     271.79    -0.19
    25   4.0472  20341.81    -0.10     271.57    -0.39

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.

22HE1    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.796    42.917    42.676
ecceobj         0.071     0.073     0.069
incobj          0.769     0.769     0.769
qmin           38.831    38.904    38.761
qmax           47.507    47.686    47.243
amean          43.044    43.164    42.922
amin           42.708    42.827    42.581
amax           43.407    43.525    43.286
emean           0.072     0.074     0.070
emin            0.052     0.055     0.049
emax            0.095     0.096     0.092
imean           2.388     2.348     2.434
imin            1.012     1.043     0.977
imax            3.232     3.151     3.317
excite_mean     0.084     0.085     0.083
fracstop        1.000     1.000     1.000
cjmean          3.082     3.083     3.080

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       173.1     164.6     173.0
kozaiamp        180.0     180.0     180.0