Orbit Fit and Astrometric record for 20MH53

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: 20MH53    
# Created Tue Apr  1 01:11:20 2025
# Orbit generated from Bernstein formalism
# Fitting     24 observations of     24
# Arc:  75.96d
# First observation: 2020/05/30
#  Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
   0.000001   0.018703   0.000004  -0.000553   0.023460   0.000000
# Chi-squared of fit:     1.89 DOF:     42 RMS:  0.05
# Min/Max residuals:    -0.12    0.10
# Exact a, adot, b, bdot, g, gdot:
  1.593847E-05  2.450766E-02 -7.916525E-07 -5.463073E-04  2.443684E-02 -9.156094E-04
# Covariance matrix:
  2.8678E-13  5.2918E-11 -3.8942E-14  2.2081E-14  1.0841E-11  3.5561E-10
  5.2918E-11  1.6409E-07 -1.1291E-10  1.0999E-10  3.0385E-08  4.9028E-07
 -3.8942E-14 -1.1291E-10  2.2768E-13 -9.5744E-13 -2.0923E-11 -3.4052E-10
  2.2081E-14  1.0999E-10 -9.5744E-13  8.8132E-12  2.0266E-11  3.0581E-10
  1.0841E-11  3.0385E-08 -2.0923E-11  2.0266E-11  5.6332E-09  9.2228E-08
  3.5561E-10  4.9028E-07 -3.4052E-10  3.0581E-10  9.2228E-08  1.7836E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.147239  -72.675972    0.628257    0.029458   -0.789111  2458999.966731
# Heliocentric elements and errors
Epoch:              2458990.5000  =  2020/05/21
Mean Anomaly:          326.90980 +/-    31.724
Argument of Peri:      159.81190 +/-    39.408
Long of Asc Node:      165.80862 +/-     0.514
Inclination:             2.44777 +/-     0.013
Eccentricity:         0.08897151 +/-    0.0192
Semi-Major Axis:     44.95736379 +/-    0.9132
Time of Perihelion: 2469110.8735 +/-    9697.7
Perihelion:          40.95743910 +/-    1.2003
Aphelion:            48.95728847 +/-    1.3182
Period (y)              301.4460 +/-      9.18
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           11.81799052 +/-    0.0374
Ecliptic Y          -39.98576020 +/-    0.1199
Ecliptic Z            1.53328166 +/-    0.0047
Ecliptic XDOT         0.00259950 +/-    0.0001
Ecliptic YDOT         0.00091686 +/-    0.0001
Ecliptic ZDOT        -0.00006524 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.72381659 +/-    0.1154
Geocenter to KBO     40.92181362 +/-    0.1257
# Hcoef:  9.54

The following table shows the complete astrometric record for 20MH53. 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 (20MH53) followed by the observatory code and reference code for the source of the astrometry.

2020 05  30.46593  19 13 56.194  -20 11 14.22  25.3r 20MH53    266  C~7ulr      
2020 05  30.54302  19 13 55.899  -20 11 14.61  25.3r 20MH53    266  C~7ulr      
2020 05  30.61862  19 13 55.608  -20 11 14.98  25.3r 20MH53    266  C~7ulr      
2020 06  01.43269  19 13 48.713  -20 11 24.55  25.8r 20MH53    266  C~7ulr      
2020 06  01.47325  19 13 48.553  -20 11 24.77  25.8r 20MH53    266  C~7ulr      
2020 06  01.60571  19 13 48.028  -20 11 25.47  25.8r 20MH53    266  C~7ulr      
2020 06  20.45583  19 12 25.645  -20 13 29.34  25.6r 20MH53    266  C~6c5f      
2020 06  20.52860  19 12 25.292  -20 13 29.89  25.6r 20MH53    266  C~6c5f      
2020 06  20.62233  19 12 24.837  -20 13 30.59  25.6r 20MH53    266  C~6c5f      
2020 06  22.44948  19 12 16.073  -20 13 44.94  25.8r 20MH53    266  C~6c5f      
2020 06  22.52092  19 12 15.722  -20 13 45.50  25.8r 20MH53    266  C~6c5f      
2020 06  22.59118  19 12 15.376  -20 13 46.04  25.8r 20MH53    266  C~6c5f      
2020 06  25.44823  19 12 01.457  -20 14 08.91  25.5r 20MH53    266  C~6c5f      
2020 06  25.53213  19 12 01.038  -20 14 09.59  25.5r 20MH53    266  C~6c5f      
2020 06  25.61487  19 12 00.625  -20 14 10.24  25.5r 20MH53    266  C~6c5f      
2020 08  12.26680  19 08 12.623  -20 21 20.09  26.0r 20MH53    266  C~6c5f      
2020 08  12.34843  19 08 12.289  -20 21 20.81  26.0r 20MH53    266  C~6c5f      
2020 08  12.42950  19 08 11.959  -20 21 21.51  26.0r 20MH53    266  C~6c5f      
2020 08  13.24332  19 08 08.738  -20 21 28.58  25.8r 20MH53    266  C~6c5f      
2020 08  13.33331  19 08 08.376  -20 21 29.37  25.8r 20MH53    266  C~6c5f      
2020 08  13.42301  19 08 08.015  -20 21 30.13  25.8r 20MH53    266  C~6c5f      
2020 08  14.24286  19 08 04.837  -20 21 37.23  25.6r 20MH53    266  C~6c5f      
2020 08  14.33285  19 08 04.480  -20 21 38.01  25.6r 20MH53    266  C~6c5f      
2020 08  14.42134  19 08 04.130  -20 21 38.76  25.6r 20MH53    266  C~6c5f      

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     0.09
     2   0.0002     -4.17    -0.01       0.14     0.09
     3   0.0004     -8.28    -0.02       0.29     0.10
     4   0.0054   -105.78     0.02       3.03    -0.12
     5   0.0055   -108.04     0.02       3.10    -0.11
     6   0.0059   -115.47     0.02       3.34    -0.11
     7   0.0575  -1281.55    -0.04      25.36     0.05
     8   0.0577  -1286.55    -0.03      25.43     0.05
     9   0.0579  -1292.99    -0.03      25.53     0.05
    10   0.0629  -1417.18     0.02      26.57    -0.05
    11   0.0631  -1422.15     0.03      26.62    -0.05
    12   0.0633  -1427.05     0.02      26.69    -0.05
    13   0.0711  -1624.29     0.00      28.19     0.02
    14   0.0714  -1630.22     0.01      28.24     0.02
    15   0.0716  -1636.07     0.00      28.32     0.02
    16   0.2021  -4873.05     0.05     -11.99     0.00
    17   0.2023  -4877.81     0.04     -12.15     0.00
    18   0.2025  -4882.50     0.05     -12.30    -0.00
    19   0.2047  -4928.34    -0.08     -13.99     0.01
    20   0.2050  -4933.49    -0.08     -14.18     0.01
    21   0.2052  -4938.63    -0.08     -14.34     0.02
    22   0.2075  -4983.87     0.04     -16.14    -0.02
    23   0.2077  -4988.95     0.03     -16.33    -0.02
    24   0.2080  -4993.93     0.03     -16.49    -0.02

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.

20MH53    quality flag:1

Type:      CLASSICAL CLASSICAL  SCATNEAR

axisobj        44.376    49.830    41.605
ecceobj         0.083     0.191     0.158
incobj          2.448     2.411     2.487
qmin           40.103    39.798    33.074
qmax           49.389    60.982    50.716
amean          44.600    50.153    41.406
amin           44.236    49.697    40.255
amax           44.992    50.678    42.297
emean           0.083     0.193     0.159
emin            0.067     0.182     0.118
emax            0.098     0.204     0.201
imean           2.790     2.394     4.098
imin            2.094     2.100     2.019
imax            3.432     2.694     6.162
excite_mean     0.096     0.198     0.176
fracstop        1.000     1.000     1.000
cjmean          3.098     3.131     3.037

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       179.4     177.6     181.0
kozaiamp        180.0     180.0     179.9