Orbit Fit and Astrometric record for 20VF1

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: 20VF1     
# Created Sat Dec  4 02:14:07 2021
# Orbit generated from Bernstein formalism
# Fitting     77 observations of     78
# Arc:   1.88y
# First observation: 2019/12/31
#  Last observation: 2021/11/15
Preliminary a, adot, b, bdot, g, gdot:
  -0.036084   0.205964   0.030715  -0.238919   0.119456   0.000000
# Chi-squared of fit:   175.91 DOF:    148 RMS:  0.27
# Min/Max residuals:    -1.57    0.68
# Exact a, adot, b, bdot, g, gdot:
  2.100990E-05  1.359614E-01 -2.747879E-05 -1.691373E-01  1.008725E-01 -1.112606E-01
# Covariance matrix:
  1.3928E-13 -1.5814E-13 -5.1739E-14  1.0941E-13 -3.8414E-14 -2.1139E-13
 -1.5814E-13  2.5982E-13  9.3618E-14 -1.9451E-13  1.3249E-14  3.7280E-13
 -5.1739E-14  9.3618E-14  1.1832E-13 -1.4263E-13  2.1060E-14  1.7482E-13
  1.0941E-13 -1.9451E-13 -1.4263E-13  2.3413E-13 -4.8809E-14 -3.6773E-13
 -3.8414E-14  1.3249E-14  2.1060E-14 -4.8809E-14  8.5413E-14  9.8071E-14
 -2.1139E-13  3.7280E-13  1.7482E-13 -3.6773E-13  9.8071E-14  7.0880E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   18.604949   53.690331   -0.707283    0.221611   -0.658256  2458848.836141
# Heliocentric elements and errors
Epoch:              2458840.5000  =  2019/12/23
Mean Anomaly:          348.57188 +/-     0.001
Argument of Peri:      219.86294 +/-     0.001
Long of Asc Node:      251.04077 +/-     0.000
Inclination:            53.50488 +/-     0.000
Eccentricity:         0.65669633 +/-    0.0000
Semi-Major Axis:     24.43234912 +/-    0.0008
Time of Perihelion: 2460240.7916 +/-       0.0
Perihelion:           8.38771512 +/-    0.0004
Aphelion:            40.47698312 +/-    0.0014
Period (y)              120.7692 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            5.40850896 +/-    0.0000
Ecliptic Y            8.54237121 +/-    0.0000
Ecliptic Z            3.16251558 +/-    0.0000
Ecliptic XDOT        -0.00379279 +/-    0.0000
Ecliptic YDOT         0.00106110 +/-    0.0000
Ecliptic ZDOT        -0.00531444 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   10.59365753 +/-    0.0000
Geocenter to KBO      9.91350362 +/-    0.0000
# Hcoef:  9.98

The following table shows the complete astrometric record for 20VF1. 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 (20VF1) followed by the observatory code and reference code for the source of the astrometry.

2019 12  31.33534  03 02 32.466  +36 37 11.60  20.3w 20VF1     F52  C~55jV      
2019 12  31.34803  03 02 32.340  +36 37 08.70  20.2w 20VF1     F52  C~55jV      
2019 12  31.36058  03 02 32.211  +36 37 05.86  20.3w 20VF1     F52  C~55jV      
2019 12  31.37302  03 02 32.079  +36 37 03.05  20.3w 20VF1     F52  C~55jV      
2020 01  01.29227  03 02 23.266  +36 33 38.38  20.1i 20VF1     F51  C~55jV      
2020 01  01.30377  03 02 23.156  +36 33 35.67  19.9i 20VF1     F51  C~55jV      
2020 01  01.31512  03 02 23.039  +36 33 33.32  20.0i 20VF1     F51  C~55jV      
2020 01  01.32648  03 02 22.938  +36 33 30.68  20.0i 20VF1     F51  C~55jV      
2020 10  12.34297  04 19 25.50   +31 40 55.9   20.4G 20VF1     G96  C~4L6h      
2020 10  12.34810  04 19 25.44   +31 40 55.3   20.5G 20VF1     G96  C~4L6h      
2020 10  12.35324  04 19 25.38   +31 40 55.1   20.4G 20VF1     G96  C~4L6h      
2020 10  12.35836  04 19 25.29   +31 40 54.7   20.4G 20VF1     G96  C~4L6h      
2020 10  28.27376  04 15 26.40   +31 11 41.9   19.8G 20VF1     G96  C~4L6h      
2020 10  28.27949  04 15 26.26   +31 11 40.5         20VF1     G96  C~4L6h      
2020 10  28.28522  04 15 26.20   +31 11 40.2         20VF1     G96  C~4L6h      
2020 10  28.29095  04 15 26.12   +31 11 39.7   19.8G 20VF1     G96  C~4L6h      
2020 11  08.75269  04 11 45.52   +30 45 12.6   20.0R 20VF1     D29  C~4L6h      
2020 11  08.77037  04 11 45.19   +30 45 10.1   19.8R 20VF1     D29  C~4L6h      
2020 11  08.78804  04 11 44.79   +30 45 06.8   19.9R 20VF1     D29  C~4L6h      
2020 11  09.03691  04 11 39.70   +30 44 29.3   20.0V 20VF1     033  C~4L6h      
2020 11  09.03824  04 11 39.67   +30 44 29.2   20.2V 20VF1     033  C~4L6h      
2020 11  09.03957  04 11 39.64   +30 44 29.0   19.9V 20VF1     033  C~4L6h      
2020 11  09.04103  04 11 39.60   +30 44 28.7   20.1V 20VF1     033  C~4L6h      
2020 11  09.296858 04 11 34.34   +30 43 50.8   20.4V 20VF1     H21  C~4L6h      
2020 11  09.302863 04 11 34.21   +30 43 49.8   19.5V 20VF1     H21  C~4L6h      
2020 11  09.308309 04 11 34.10   +30 43 49.0   19.6V 20VF1     H21  C~4L6h      
2020 11  09.87184  04 11 22.50   +30 42 23.2   18.8R 20VF1     K51  C~4L6h      
2020 11  09.88156  04 11 22.30   +30 42 21.6   19.0R 20VF1     K51  C~4L6h      
2020 11  10.05616  04 11 18.62   +30 41 55.3   19.6G 20VF1     L07  C~4OUY      
2020 11  10.09572  04 11 17.78   +30 41 49.1   19.8G 20VF1     L07  C~4OUY      
2020 11  10.76675  04 11 03.83   +30 40 07.0   20.4R 20VF1     D29  C~4L6h      
2020 11  10.78178  04 11 03.44   +30 40 04.2   20.1R 20VF1     D29  C~4L6h      
2020 11  10.79680  04 11 03.13   +30 40 00.9   20.1R 20VF1     D29  C~4L6h      
2020 11  22.277286 04 06 55.09   +30 08 30.3   19.6G 20VF1     G96  C~4OUY      
2020 11  22.282447 04 06 54.98   +30 08 29.3   19.5G 20VF1     G96  C~4OUY      
2020 11  22.287602 04 06 54.86   +30 08 28.7   19.8G 20VF1     G96  C~4OUY      
2020 11  22.292753 04 06 54.73   +30 08 27.6   19.6G 20VF1     G96  C~4OUY      
2020 12  04.44465  04 02 28.272  +29 31 19.39  19.1i 20VF1     F52  C~4OUY      
2020 12  04.45488  04 02 28.046  +29 31 17.64  19.3i 20VF1     F52  C~4OUY      
2020 12  04.46512  04 02 27.824  +29 31 15.76  19.3i 20VF1     F52  C~4OUY      
2020 12  04.47541  04 02 27.615  +29 31 13.65  19.1i 20VF1     F52  C~4OUY      
2021 01  05.36604  03 52 56.574  +27 45 41.67  19.9w 20VF1     F52  C~4UT6      
2021 01  05.37699  03 52 56.421  +27 45 39.48  20.0w 20VF1     F52  C~4UT6      
2021 01  05.38801  03 52 56.281  +27 45 37.30  20.0w 20VF1     F52  C~4UT6      
2021 01  05.39904  03 52 56.138  +27 45 35.12  20.2w 20VF1     F52  C~4UT6      
2021 01  09.36117  03 52 08.929  +27 32 42.35  20.0w 20VF1     F52  C~4UT6      
2021 01  09.37140  03 52 08.809  +27 32 40.35  20.0w 20VF1     F52  C~4UT6      
2021 01  09.38163  03 52 08.695  +27 32 38.35  19.9w 20VF1     F52  C~4UT6      
2021 01  09.39191  03 52 08.567  +27 32 36.30  19.9w 20VF1     F52  C~4UT6      
2021 01  12.53424  03 51 35.93   +27 22 33.3   20.3R 20VF1     D29  C~4UT6      
2021 01  12.53512  03 51 35.92   +27 22 32.5   19.9R 20VF1     D29  C~4UT6      
2021 01  12.54838  03 51 35.84   +27 22 29.0   19.5R 20VF1     D29  C~4UT6      
2021 01  12.56252  03 51 35.66   +27 22 27.7   19.9R 20VF1     D29  C~4UT6      
2021 01  12.56340  03 51 35.58   +27 22 27.3   20.2R 20VF1     D29  C~4UT6      
2021 09  12.09401  05 10 34.07   +21 23 44.6   19.3R 20VF1     157  C~55jV      
2021 09  12.11571  05 10 34.24   +21 23 41.8   19.2R 20VF1     157  C~55jV      
2021 10  03.05399  05 11 22.32   +20 34 18.8   18.9R 20VF1     157  C~55jV      
2021 10  03.09808  05 11 22.18   +20 34 11.4   19.1R 20VF1     157  C~55jV      
2021 10  09.380280 05 10 56.30   +20 17 49.9   20.5g 20VF1     I41  C~55jV      
2021 10  09.392670 05 10 56.24   +20 17 48.1   20.3g 20VF1     I41  C~55jV      
2021 10  09.95738  05 10 53.02   +20 16 18.1   20.4G 20VF1     A17  C~55jV      
2021 10  10.01713  05 10 52.64   +20 16 08.1   20.0G 20VF1     A17  C~55jV      
2021 10  10.06160  05 10 52.38   +20 16 01.3   19.8G 20VF1     A17  C~55jV      
2021 10  11.368980 05 10 44.25   +20 12 31.5   19.5r 20VF1     I41  C~55jV      
2021 10  11.396390 05 10 44.07   +20 12 27.1   19.6r 20VF1     I41  C~55jV      
2021 10  16.08027  05 10 08.45   +19 59 40.7   19.1R 20VF1     157  C~59vu      
2021 10  16.10196  05 10 08.27   +19 59 36.8   19.0R 20VF1     157  C~59vu      
2021 10  29.498190 05 07 33.56   +19 21 16.9   19.7G 20VF1     V00  C~5BmH      
2021 10  29.502526 05 07 33.50   +19 21 16.1   19.7G 20VF1     V00  C~5BmH      
2021 10  29.509039 05 07 33.40   +19 21 15.0   19.6G 20VF1     V00  C~5BmH      
2021 10  29.513368 05 07 33.34   +19 21 14.2   19.5G 20VF1     V00  C~5BmH      
2021 11  13.546926 05 03 18.806  +18 35 43.68  19.4w 20VF1     F52  C~5Fyw      
2021 11  13.559885 05 03 18.540  +18 35 41.37  19.4w 20VF1     F52  C~5Fyw      
2021 11  13.572875 05 03 18.282  +18 35 39.01  19.0w 20VF1     F52  C~5Fyw      
2021 11  15.376225 05 02 43.18   +18 30 04.1   19.4G 20VF1     G96  C~5Fyw      
2021 11  15.382075 05 02 43.08   +18 30 03.1   19.5G 20VF1     G96  C~5Fyw      
2021 11  15.387709 05 02 42.95   +18 30 02.1   19.6G 20VF1     G96  C~5Fyw      
2021 11  15.393357 05 02 42.83   +18 30 01.0   19.3G 20VF1     G96  C~5Fyw      

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     0.06       0.00     0.20
     2   0.0000     -2.30     0.09      -2.33     0.13
     3   0.0001     -4.62     0.08      -4.59     0.11
     4   0.0001     -6.96     0.01      -6.81     0.11
     5   0.0026   -168.53     0.07    -171.28     0.11
     6   0.0027   -170.60     0.07    -173.48    -0.04
     7   0.0027   -172.63     0.06    -175.31     0.15
     8   0.0027   -174.57     0.16    -177.48     0.02
     9   0.7830  53999.92     0.20  -29587.09    -0.02
    10   0.7831  53999.04     0.23  -29587.62    -0.16
    11   0.7831  53998.20     0.31  -29587.72     0.12
    12   0.7831  53996.93    -0.05  -29587.99     0.24
    13   0.8267  50544.93    -0.12  -30995.18    -0.03
    14   0.8267  50542.87    -0.70  -30996.39    -0.67
    15   0.8267  50542.01    -0.06  -30996.59    -0.32
    16   0.8267  50540.86     0.29  -30996.96    -0.13
    17   0.8581  47347.28    -0.39  -32227.01     0.05
    18   0.8581  47342.49     0.18  -32228.96     0.14
    19   0.8582  47336.64    -0.31  -32231.59    -0.45
    20   0.8589  47262.74    -0.16  -32260.48    -0.26
    21   0.8589  47262.32    -0.18  -32260.53    -0.15
    22   0.8589  47261.88    -0.21  -32260.67    -0.15
    23   0.8589  47261.30    -0.35  -32260.91    -0.21
    24   0.8596  47185.03    -0.14  -32289.85     0.30
    25   0.8596  47183.14    -0.20  -32290.63     0.22
    26   0.8596  47181.54    -0.14  -32291.25     0.23
    27   0.8612  47013.06     0.08  -32357.32     0.14
    28   0.8612  47010.14     0.11  -32358.58    -0.01
    29   0.8617  46956.79     0.20  -32378.57     0.15
    30   0.8618  46944.59     0.12  -32383.33     0.05
    31   0.8636  46742.06     0.61  -32461.49     0.68
    32   0.8636  46736.40    -0.41  -32463.62     0.33
    33   0.8637  46731.77    -0.39  -32466.42    -0.69
    34   0.8951  43113.87     0.10  -33911.22     0.03
    35   0.8951  43112.24     0.17  -33912.02    -0.09
    36   0.8951  43110.52     0.15  -33912.38     0.23
    37   0.8952  43108.61    -0.07  -33913.24     0.05
    38   0.9284  39176.85    -0.11  -35621.42    -0.17
    39   0.9285  39173.52    -0.10  -35622.71     0.05
    40   0.9285  39170.24    -0.05  -35624.13     0.14
    41   0.9285  39167.09     0.15  -35625.83    -0.04
    42   1.0158  30394.65     0.01  -40725.34     0.07
    43   1.0159  30392.19    -0.12  -40727.18     0.07
    44   1.0159  30389.90    -0.05  -40729.05     0.06
    45   1.0159  30387.58    -0.03  -40730.91     0.06
    46   1.0268  29610.14     0.01  -41399.34     0.09
    47   1.0268  29608.15    -0.03  -41401.08     0.09
    48   1.0268  29606.25     0.02  -41402.83     0.07
    49   1.0268  29604.15    -0.13  -41404.59     0.05
    50   1.0355  29053.11     0.17  -41936.74     0.23
    51   1.0355  29052.84     0.05  -41937.54    -0.42
    52   1.0355  29051.13     0.61  -41940.93    -1.57
    53   1.0355  29048.44     0.35  -41941.77    -0.02
    54   1.0355  29047.28    -0.66  -41941.97    -0.07
    55   1.6995 101635.23    -0.14  -76358.12     0.61
    56   1.6996 101638.54     0.25  -76361.91     0.57
    57   1.7569 102747.26 (   0.33) -80163.85 (   0.92)
    58   1.7571 102745.25     0.18  -80172.93     0.06
    59   1.7743 102340.92    -0.14  -81365.18    -0.56
    60   1.7743 102339.94     0.09  -81367.35    -0.38
    61   1.7758 102287.02     0.25  -81475.15     0.26
    62   1.7760 102280.72    -0.05  -81487.09    -0.35
    63   1.7761 102276.41     0.17  -81495.20    -0.02
    64   1.7797 102141.35    -0.24  -81745.33     0.21
    65   1.7798 102138.34    -0.11  -81750.55     0.19
    66   1.7926 101533.67     0.02  -82652.76     0.43
    67   1.7927 101530.61     0.33  -82657.35     0.01
    68   1.8293  98815.12     0.11  -85261.25    -0.03
    69   1.8293  98814.06     0.18  -85262.14    -0.08
    70   1.8294  98812.28     0.08  -85263.32     0.01
    71   1.8294  98811.21     0.15  -85264.21    -0.04
    72   1.8705  94254.41     0.13  -88168.46    -0.08
    73   1.8706  94249.62    -0.08  -88170.77     0.07
    74   1.8706  94244.97    -0.14  -88173.17     0.15
    75   1.8755  93613.53    -0.20  -88516.72    -0.13
    76   1.8756  93611.73     0.12  -88517.76    -0.06
    77   1.8756  93609.38    -0.19  -88518.72     0.04
    78   1.8756  93607.22    -0.30  -88519.84    -0.00

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.

20VF1    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        24.568    24.570    24.567
ecceobj         0.657     0.657     0.657
incobj         53.477    53.477    53.477
qmin            8.327     8.402     8.403
qmax           42.836    43.012    46.119
amean          25.205    25.143    25.725
amin           24.568    24.570    24.567
amax           25.647    25.739    27.289
emean           0.667     0.664     0.668
emin            0.657     0.657     0.656
emax            0.673     0.671     0.690
imean          54.668    54.606    54.851
imin           54.416    54.417    54.189
imax           54.782    54.754    55.471
excite_mean     1.053     1.052     1.056
fracstop        0.001     0.000     0.004
cjmean          1.991     1.996     1.971

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       218.5     219.2     215.6
kozaiamp          1.0       0.3       3.3