Orbit Fit and Astrometric record for 20VL26

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: 20VL26    
# Created Thu Mar 28 01:19:25 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     49 observations of     49
# Arc:   5.16y
# First observation: 2018/11/11
#  Last observation: 2024/01/07
# Chi-squared of fit:    25.51 DOF:     92 RMS:  0.13
# Min/Max residuals:    -0.27    0.47
# Exact a, adot, b, bdot, g, gdot:
  2.283489E-05  6.709883E-02 -8.687647E-06 -2.382579E-02  4.685004E-02 -3.340513E-02
# Covariance matrix:
  9.2975E-13 -4.6316E-13 -2.1875E-13  1.4093E-13 -1.2267E-13 -6.7258E-13
 -4.6316E-13  2.7580E-13  1.4604E-13 -9.4077E-14  8.5321E-14  4.4883E-13
 -2.1875E-13  1.4604E-13  4.3402E-13 -1.3040E-13  4.7755E-14  2.5433E-13
  1.4093E-13 -9.4077E-14 -1.3040E-13  5.2360E-14 -3.0455E-14 -1.6385E-13
 -1.2267E-13  8.5321E-14  4.7755E-14 -3.0455E-14  1.1373E-13  1.4182E-13
 -6.7258E-13  4.4883E-13  2.5433E-13 -1.6385E-13  1.4182E-13  7.8199E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.880320   36.089784   -0.218768    0.031998   -0.970547  2458433.707663
# Heliocentric elements and errors
Epoch:              2458434.5000  =  2018/11/12
Mean Anomaly:          349.49129 +/-     0.001
Argument of Peri:      237.08529 +/-     0.002
Long of Asc Node:      221.68651 +/-     0.000
Inclination:            19.63119 +/-     0.000
Eccentricity:         0.67718890 +/-    0.0000
Semi-Major Axis:     54.12140671 +/-    0.0045
Time of Perihelion: 2462679.7078 +/-      17.8
Perihelion:          17.47099070 +/-    0.0020
Aphelion:            90.77182272 +/-    0.0077
Period (y)              398.1638 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           17.89518985 +/-    0.0001
Ecliptic Y           13.30825113 +/-    0.0001
Ecliptic Z            0.70010592 +/-    0.0000
Ecliptic XDOT        -0.00384187 +/-    0.0000
Ecliptic YDOT         0.00204393 +/-    0.0000
Ecliptic ZDOT        -0.00145584 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   22.31250645 +/-    0.0001
Geocenter to KBO     21.34496734 +/-    0.0002
# Hcoef:  8.59

The following table shows the complete astrometric record for 20VL26. 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 (20VL26) followed by the observatory code and reference code for the source of the astrometry.

2018 11  11.206862 02 12 31.11   +15 19 29.1   21.5z 20VL26    W84  C~5zHI      
2020 11  13.18516  02 48 16.295  +15 05 22.54  22.1r 20VL26    807  C~5Jzg      
2020 11  15.18749  02 47 59.145  +15 03 34.31  22.2r 20VL26    807  C~5Jzg      
2020 12  16.21812  02 44 09.166  +14 38 43.51  22.2r 20VL26    304  C~5Jzg      
2020 12  17.20906  02 44 03.554  +14 38 04.73  22.2r 20VL26    304  C~5Jzg      
2021 01  15.07337  02 42 30.610  +14 24 55.17  22.1r 20VL26    304  C~5Jzg      
2021 01  16.06583  02 42 30.099  +14 24 41.15  22.1r 20VL26    304  C~5Jzg      
2021 09  03.40480  03 15 15.670  +15 42 49.42  22.1r 20VL26    304  C~5Jzg      
2021 10  30.34307  03 10 10.593  +15 02 18.39  22.0r 20VL26    304  C~5Jzg      
2021 10  30.34975  03 10 10.538  +15 02 18.16  22.1r 20VL26    304  C~5Jzg      
2022 10  29.403500 03 31 24.481  +14 39 30.38  21.5G 20VL26    G37  C~5zHI      
2022 10  29.452000 03 31 24.055  +14 39 27.75        20VL26    G37  C~5zHI      
2022 10  29.499790 03 31 23.647  +14 39 25.19        20VL26    G37  C~5zHI      
2022 11  01.358543 03 30 59.221  +14 36 55.68  21.5w 20VL26    F52  C~5zHI      
2022 11  01.369287 03 30 59.128  +14 36 55.21  21.6w 20VL26    F52  C~5zHI      
2022 11  01.380109 03 30 59.028  +14 36 54.55  21.6w 20VL26    F52  C~5zHI      
2022 11  16.347884 03 28 44.318  +14 23 56.11  21.7w 20VL26    F51  C~63mt      
2022 11  16.359551 03 28 44.202  +14 23 55.47  21.6w 20VL26    F51  C~63mt      
2022 11  16.371244 03 28 44.096  +14 23 55.06  21.5w 20VL26    F51  C~63mt      
2022 12  14.268686 03 24 41.940  +14 02 36.04  21.4w 20VL26    F52  C~67Ik      
2022 12  14.279605 03 24 41.839  +14 02 35.37  21.6w 20VL26    F52  C~67Ik      
2022 12  14.290520 03 24 41.761  +14 02 35.10  21.4w 20VL26    F52  C~67Ik      
2022 12  14.301462 03 24 41.673  +14 02 34.55  21.3w 20VL26    F52  C~67Ik      
2023 10  17.438468 03 55 08.274  +14 17 02.05  21.5w 20VL26    F51  C~7Bkf      
2023 10  17.451318 03 55 08.196  +14 17 01.33  21.5w 20VL26    F51  C~7Bkf      
2023 10  17.464211 03 55 08.101  +14 17 00.69  21.6w 20VL26    F51  C~7Bkf      
2023 10  17.477256 03 55 08.007  +14 17 00.02  21.7w 20VL26    F51  C~7Bkf      
2023 10  22.548436 03 54 32.214  +14 12 44.06  21.7w 20VL26    F51  C~7Mub      
2023 10  22.559964 03 54 32.112  +14 12 43.39  21.7w 20VL26    F51  C~7Mub      
2023 10  22.571524 03 54 32.036  +14 12 42.90  21.7w 20VL26    F51  C~7Mub      
2023 10  22.583144 03 54 31.941  +14 12 42.30  21.6w 20VL26    F51  C~7Mub      
2023 11  12.430454 03 51 35.831  +13 54 55.30  21.4G 20VL26    V00  C~7RR2      
2023 11  12.438351 03 51 35.784  +13 54 54.76  21.8G 20VL26    V00  C~7RR2      
2023 11  12.443854 03 51 35.694  +13 54 54.18  21.2G 20VL26    V00  C~7RR2      
2023 11  12.449360 03 51 35.633  +13 54 53.86  21.4G 20VL26    V00  C~7RR2      
2023 11  16.335824 03 50 59.530  +13 51 39.75  21.2w 20VL26    F52  C~7WXn      
2023 11  16.348682 03 50 59.418  +13 51 38.99  21.3w 20VL26    F52  C~7WXn      
2023 11  16.374438 03 50 59.169  +13 51 37.77  21.5w 20VL26    F52  C~7WXn      
2023 12  04.443296 03 48 09.882  +13 37 39.70  21.4w 20VL26    F51  C~7XOS      
2023 12  04.474002 03 48 09.596  +13 37 38.51  21.4w 20VL26    F51  C~7XOS      
2023 12  04.487603 03 48 09.479  +13 37 37.91  21.5w 20VL26    F51  C~7XOS      
2024 01  01.227826 03 44 31.607  +13 22 05.51  21.5w 20VL26    F52  C~7dN0      
2024 01  01.240157 03 44 31.529  +13 22 05.33  21.3w 20VL26    F52  C~7dN0      
2024 01  01.252584 03 44 31.459  +13 22 04.86  21.5w 20VL26    F52  C~7dN0      
2024 01  01.264995 03 44 31.367  +13 22 04.71  21.6w 20VL26    F52  C~7dN0      
2024 01  07.332508 03 43 57.434  +13 19 56.93  21.7w 20VL26    F51  C~7gyg      
2024 01  07.343785 03 43 57.384  +13 19 56.84  21.6w 20VL26    F51  C~7gyg      
2024 01  07.354934 03 43 57.324  +13 19 56.65  21.6w 20VL26    F51  C~7gyg      
2024 01  07.366080 03 43 57.258  +13 19 56.54  21.9w 20VL26    F51  C~7gyg      

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    -0.08       0.00     0.11
     2   2.0068      0.00    -0.08       0.00    -0.05
     3   2.0123      0.00    -0.23       0.00    -0.27
     4   2.0972      0.00     0.10       0.00    -0.21
     5   2.0999      0.00     0.14       0.00    -0.02
     6   2.1790      0.00     0.13       0.00    -0.02
     7   2.1817      0.00     0.11       0.00     0.08
     8   2.8123      0.00    -0.18       0.00     0.26
     9   2.9682      0.00     0.17       0.00    -0.00
    10   2.9682      0.00     0.22       0.00     0.13
    11   3.9649      0.00     0.02       0.00     0.01
    12   3.9651      0.00    -0.12       0.00    -0.07
    13   3.9652      0.00    -0.09       0.00    -0.11
    14   3.9730      0.00    -0.03       0.00    -0.09
    15   3.9731      0.00    -0.00       0.00    -0.00
    16   3.9731      0.00    -0.07       0.00    -0.10
    17   4.0141      0.00    -0.05       0.00     0.07
    18   4.0141      0.00    -0.15       0.00     0.03
    19   4.0141      0.00    -0.10       0.00     0.21
    20   4.0905      0.00     0.15       0.00     0.18
    21   4.0905      0.00    -0.09       0.00    -0.07
    22   4.0906      0.00     0.02       0.00     0.08
    23   4.0906      0.00    -0.02       0.00    -0.05
    24   4.9315      0.00    -0.04       0.00    -0.03
    25   4.9315      0.00     0.11       0.00    -0.11
    26   4.9316      0.00     0.02       0.00    -0.11
    27   4.9316      0.00    -0.04       0.00    -0.13
    28   4.9455      0.00     0.12       0.00     0.00
    29   4.9455      0.00    -0.10       0.00    -0.08
    30   4.9456      0.00     0.07       0.00     0.02
    31   4.9456      0.00    -0.03       0.00     0.02
    32   5.0027      0.00     0.06       0.00     0.47
    33   5.0027      0.00     0.46       0.00     0.33
    34   5.0027      0.00    -0.11       0.00     0.03
    35   5.0027      0.00    -0.26       0.00    -0.01
    36   5.0134      0.00    -0.07       0.00     0.06
    37   5.0134      0.00     0.09       0.00    -0.07
    38   5.0135      0.00     0.04       0.00    -0.02
    39   5.0629      0.00    -0.05       0.00    -0.11
    40   5.0630      0.00    -0.06       0.00     0.01
    41   5.0631      0.00     0.09       0.00    -0.01
    42   5.1390      0.00    -0.04       0.00    -0.05
    43   5.1390      0.00    -0.06       0.00     0.06
    44   5.1391      0.00     0.06       0.00    -0.12
    45   5.1391      0.00    -0.15       0.00     0.02
    46   5.1557      0.00    -0.11       0.00    -0.21
    47   5.1557      0.00     0.03       0.00    -0.09
    48   5.1558      0.00     0.01       0.00    -0.07
    49   5.1558      0.00    -0.10       0.00     0.03

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.

20VL26    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        55.320    55.319    55.321
ecceobj         0.682     0.682     0.682
incobj         19.541    19.541    19.541
qmin           17.201    17.120    16.828
qmax           93.504    93.060    93.560
amean          53.189    53.570    53.556
amin           51.617    52.011    51.273
amax           55.524    55.319    55.607
emean           0.664     0.667     0.668
emin            0.637     0.647     0.643
emax            0.684     0.683     0.689
imean          21.795    21.420    21.530
imin           20.239    20.162    19.505
imax           24.623    23.556    24.179
excite_mean     0.761     0.761     0.763
fracstop        0.033     0.036     0.090
cjmean          2.417     2.418     2.410

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       255.5     255.3     281.2
kozaiamp         18.1      17.9      46.1