Orbit Fit and Astrometric record for 16684

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: 16684     
# Created Fri Sep 24 01:06:50 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     95 observations of     95
# Arc:  26.16y
# First observation: 1994/05/11
#  Last observation: 2020/07/09
# Chi-squared of fit:   463.73 DOF:    184 RMS:  0.39
# Min/Max residuals:    -1.40    0.99
# Exact a, adot, b, bdot, g, gdot:
  2.031142E-05  2.281888E-02  7.477424E-07 -1.491921E-03  2.368347E-02 -1.236218E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.249249 -151.128474   -0.375992   -0.004035   -0.931628  2449484.439587
# Heliocentric elements and errors
Epoch:              2449484.5000  =  1994/05/12
Mean Anomaly:          302.84702 +/-     0.000
Argument of Peri:      246.22139 +/-     0.000
Long of Asc Node:       25.64689 +/-     0.000
Inclination:             3.73952 +/-     0.000
Eccentricity:         0.05341762 +/-    0.0000
Semi-Major Axis:     44.35236709 +/-    0.0000
Time of Perihelion: 2466612.6325 +/-       0.0
Perihelion:          41.98316936 +/-    0.0000
Aphelion:            46.72156483 +/-    0.0000
Period (y)              295.3816 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.60936001 +/-    0.0000
Ecliptic Y          -21.17394021 +/-    0.0000
Ecliptic Z           -0.18363690 +/-    0.0000
Ecliptic XDOT         0.00140499 +/-    0.0000
Ecliptic YDOT        -0.00224427 +/-    0.0000
Ecliptic ZDOT        -0.00017198 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.16058386 +/-    0.0000
Geocenter to KBO     42.22362079 +/-    0.0000
# Hcoef:  6.72

The following table shows the complete astrometric record for 16684. 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 (16684) followed by the observatory code and reference code for the source of the astrometry.

1994 05  11.93889  13 46 58.52   -11 18 22.9   22.9R 16684     950  A23646      
1994 05  13.98194  13 46 50.20   -11 17 38.1   24. V 16684     950  A23646      
1994 05  14.89514  13 46 46.58   -11 17 18.3         16684     950  A23646      
1994 05  15.97639  13 46 42.24   -11 16 55.1         16684     950  A23646      
1994 05  16.98958  13 46 38.29   -11 16 32.2         16684     950  A23646      
1994 06  03.93333  13 45 36.04   -11 10 57.0         16684     950   23646      
1995 02  25.5758   13 56 50.00   -12 16 50.6   22.0R 16684     568  A24813      
1995 02  25.5852   13 56 49.98   -12 16 50.7         16684     568  A24813      
1995 02  26.41493  13 56 48.04   -12 16 41.6         16684     675  C25125      
1995 02  26.53646  13 56 47.78   -12 16 40.0         16684     675  C25125      
1995 02  26.5526   13 56 47.77   -12 16 40.4         16684     568  A24813      
1995 04  01.1229   13 54 53.68   -12 06 59.5         16684     950  C25182      
1995 04  01.1764   13 54 53.45   -12 06 58.1   23.2R 16684     950  C25029      
1995 04  07.21883  13 54 27.36   -12 04 43.0   23. R 16684     809  C25179      
1995 04  07.31584  13 54 26.93   -12 04 40.8         16684     809  C25179      
1995 04  07.32868  13 54 26.87   -12 04 40.6         16684     809  C25179      
1995 04  07.34153  13 54 26.81   -12 04 40.3         16684     809  C25179      
1997 04  07.05448  14 04 18.67   -13 08 40.4         16684     950  C30062      
1997 04  07.09899  14 04 18.50   -13 08 39.6         16684     950  C30062      
1997 04  07.15582  14 04 18.23   -13 08 38.4         16684     950  C30062      
1997 04  08.06231  14 04 14.23   -13 08 18.0         16684     950  C30062      
1997 04  08.10719  14 04 14.02   -13 08 17.3         16684     950  C30062      
1997 04  08.16403  14 04 13.79   -13 08 16.2         16684     950  C30062      
1997 05  31.24160  14 00 26.30   -12 48 45.4   23.5R 16684     696  C30018      
1997 05  31.30419  14 00 26.04   -12 48 43.7         16684     696  C30018      
1997 06  01.31049  14 00 22.71   -12 48 25.4         16684     696  C30018      
1998 06  23.17463  14 04 18.93   -13 14 56.3   22.1R 16684     705  Ca1682      
1998 06  23.19876  14 04 18.88   -13 14 56.1   22.3R 16684     705  Ca1682      
1998 06  23.20485  14 04 18.86   -13 14 56.1   22.5R 16684     705  Ca1682      
1998 06  23.20763  14 04 18.93   -13 14 55.4   23.0R 16684     705  Ca1682      
1998 06  23.23968  14 04 18.77   -13 14 55.8   22.7R 16684     705  Ca1682      
1998 06  23.24598  14 04 18.75   -13 14 55.8   23.1R 16684     705  Ca1682      
1998 06  23.24877  14 04 18.85   -13 14 55.1         16684     705  Ca1682      
1998 06  24.18208  14 04 17.05   -13 14 45.7         16684     705  Ca1682      
1998 06  24.20626  14 04 16.97   -13 14 45.4         16684     705  Ca1682      
1998 06  24.23200  14 04 16.92   -13 14 44.9         16684     705  Ca1682      
1998 06  24.25579  14 04 16.88   -13 14 44.8         16684     705  Ca1682      
1999 03  12.22387  14 15 55.88   -14 19 12.1         16684     829  Cb7359      
1999 03  12.29363  14 15 55.69   -14 19 10.2         16684     829  Cb7359      
1999 03  12.35495  14 15 55.48   -14 19 09.8         16684     829  Cb7359      
1999 05  21.31166  14 11 00.94   -13 55 15.2   23.0R 16684     697  Cb0711      
1999 05  21.35213  14 11 00.78   -13 55 14.2   23.4R 16684     697  Cb0711      
1999 05  23.29515  14 10 52.87   -13 54 34.5   23.4R 16684     697  Cb0711      
2000 06  28.95131  14 13 59.87   -14 16 04.3         16684     950  Cb6356      
2000 06  28.97688  14 13 59.81   -14 16 04.5         16684     950  Cb6356      
2000 06  29.00241  14 13 59.75   -14 16 04.2         16684     950  Cb6356      
2001 05  21.40836  14 21 01.87   -14 56 52.7         16684     568  Cd2683      
2001 05  21.42471  14 21 01.80   -14 56 52.4         16684     568  Cd2683      
2001 05  23.02756  14 20 55.14   -14 56 19.8   22.8R 16684     807  Cd2040      
2001 05  23.11971  14 20 54.75   -14 56 18.1         16684     807  Cd2040      
2012 05  19.391199 15 19 17.577  -20 08 38.50  22.4G 16684     F51  C~41HW      
2013 06  01.369405 15 23 46.483  -20 30 06.91  22.6G 16684     F51  C~41HW      
2013 06  01.384225 15 23 46.430  -20 30 06.51  22.9G 16684     F51  C~41HW      
2013 06  01.399037 15 23 46.347  -20 30 06.39  23.2G 16684     F51  C~41HW      
2013 06  01.413848 15 23 46.256  -20 30 05.72  21.2G 16684     F51  C~41HW      
2014 05  08.471660 15 31 16.835  -21 01 20.94  22.4G 16684     F51  C~41HW      
2014 05  08.483760 15 31 16.769  -21 01 20.92  22.6G 16684     F51  C~41HW      
2014 05  08.495877 15 31 16.718  -21 01 20.74  23.4G 16684     F51  C~41HW      
2014 05  08.507982 15 31 16.648  -21 01 20.42  22.7G 16684     F51  C~41HW      
2014 05  20.383681 15 30 17.942  -20 58 07.04  22.1G 16684     F51  C~41HW      
2014 05  20.394994 15 30 17.863  -20 58 06.75  22.7G 16684     F51  C~41HW      
2014 05  20.406286 15 30 17.798  -20 58 06.63  22.7G 16684     F51  C~41HW      
2014 05  20.417574 15 30 17.751  -20 58 06.33  22.4G 16684     F51  C~41HW      
2015 05  25.410942 15 35 29.542  -21 20 43.11  22.6G 16684     F51  C~41HW      
2015 07  19.281754 15 32 03.443  -21 08 15.10  23.1G 16684     F51  C~41HW      
2016 03  07.626133 15 45 54.303  -21 56 12.26  23.0G 16684     F51  C~41HW      
2016 03  07.644404 15 45 54.307  -21 56 12.28  22.4G 16684     F51  C~41HW      
2017 03  27.632857 15 50 56.605  -22 17 20.89  22.7G 16684     F51  C~41HW      
2019 05  27.431699 15 58 06.176  -22 49 21.77  22.6G 16684     F51  C~41HW      
2019 05  27.443608 15 58 06.093  -22 49 21.98  23.2G 16684     F51  C~41HW      
2019 05  27.455524 15 58 06.037  -22 49 21.75  23.0G 16684     F51  C~41HW      
2019 05  27.467428 15 58 05.987  -22 49 21.73  23.6G 16684     F51  C~41HW      
2019 05  29.408110 15 57 56.196  -22 48 54.47  22.6G 16684     F51  C~41HW      
2019 05  29.419219 15 57 56.154  -22 48 54.19  22.2G 16684     F51  C~41HW      
2019 05  29.441345 15 57 56.032  -22 48 53.83  22.2G 16684     F51  C~41HW      
2019 06  01.373864 15 57 41.315  -22 48 13.10  22.9G 16684     F51  C~41HW      
2019 06  01.385035 15 57 41.251  -22 48 12.82  23.0G 16684     F51  C~41HW      
2019 06  01.396228 15 57 41.202  -22 48 12.61  22.8G 16684     F51  C~41HW      
2019 06  01.407394 15 57 41.140  -22 48 12.39  22.4G 16684     F51  C~41HW      
2019 06  03.359276 15 57 31.428  -22 47 45.00  22.7G 16684     F51  C~41HW      
2019 06  03.370277 15 57 31.348  -22 47 44.87  22.6G 16684     F51  C~41HW      
2019 06  03.381261 15 57 31.294  -22 47 44.61  23.1G 16684     F51  C~41HW      
2019 06  03.392221 15 57 31.256  -22 47 44.84  23.0G 16684     F51  C~41HW      
2019 06  06.310510 15 57 16.850  -22 47 03.41  22.8G 16684     G37  C~37Pp      
2019 06  06.346730 15 57 16.663  -22 47 03.12        16684     G37  C~37Pp      
2019 06  10.347608 15 56 57.328  -22 46 06.78  21.9G 16684     F51  C~41HW      
2019 06  21.329650 15 56 07.127  -22 43 35.85  23.2G 16684     F51  C~41HW      
2019 06  21.352046 15 56 07.045  -22 43 35.54  22.6G 16684     F51  C~41HW      
2019 06  22.342202 15 56 02.785  -22 43 21.96  22.3G 16684     F51  C~41HW      
2019 07  01.350220 15 55 26.489  -22 41 26.86  22.7G 16684     F51  C~41HW      
2019 07  01.362137 15 55 26.432  -22 41 26.34  23.0G 16684     F51  C~41HW      
2019 07  01.374019 15 55 26.400  -22 41 26.27  22.7G 16684     F51  C~41HW      
2019 07  01.385913 15 55 26.368  -22 41 26.12  22.8G 16684     F51  C~41HW      
2019 07  29.300020 15 54 10.733  -22 36 52.07  23.4G 16684     F51  C~41HW      
2020 07  09.337512 16 00 40.215  -23 00 31.64  23.2G 16684     F51  C~41HW      

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    -1.13       0.00     0.04
     2   0.0056      0.00    -0.80       0.00    -0.23
     3   0.0081      0.00    -0.06       0.00    -0.31
     4   0.0111      0.00    -0.44       0.00    -0.40
     5   0.0138      0.00     0.22       0.00     0.90
     6   0.0630      0.00    -0.31       0.00    -0.40
     7   0.7930      0.00     0.74       0.00     0.57
     8   0.7930      0.00     0.77       0.00     0.37
     9   0.7953      0.00    -0.03       0.00     0.31
    10   0.7956      0.00     0.43       0.00     0.54
    11   0.7957      0.00     0.74       0.00    -0.08
    12   0.8876      0.00     0.46       0.00     0.18
    13   0.8877      0.00     0.46       0.00     0.40
    14   0.9043      0.00    -0.02       0.00    -0.68
    15   0.9045      0.00     0.03       0.00    -0.71
    16   0.9046      0.00    -0.01       0.00    -0.81
    17   0.9046      0.00    -0.05       0.00    -0.80
    18   2.9052      0.00     0.20       0.00     0.37
    19   2.9053      0.00     0.62       0.00     0.19
    20   2.9055      0.00     0.37       0.00     0.13
    21   2.9079      0.00    -0.05       0.00     0.49
    22   2.9081      0.00    -0.19       0.00     0.19
    23   2.9082      0.00     0.18       0.00     0.03
    24   3.0535      0.00     0.09       0.00    -0.84
    25   3.0537      0.00    -0.52       0.00    -0.27
    26   3.0565      0.00     0.99       0.00     0.06
    27   4.1156      0.00    -0.51       0.00    -0.14
    28   4.1157      0.00    -0.51       0.00    -0.19
    29   4.1157      0.00    -0.63       0.00    -0.25
    30   4.1157      0.00     0.51       0.00     0.42
    31   4.1158      0.00    -0.90       0.00    -0.32
    32   4.1158      0.00    -1.01       0.00    -0.39
    33   4.1158      0.00     0.58       0.00     0.28
    34   4.1184      0.00     0.90       0.00     0.14
    35   4.1185      0.00     0.42       0.00     0.19
    36   4.1185      0.00     0.43       0.00     0.43
    37   4.1186      0.00     0.53       0.00     0.29
    38   4.8331      0.00    -1.40       0.00    -0.77
    39   4.8333      0.00    -1.04       0.00     0.19
    40   4.8334      0.00    -1.36       0.00    -0.24
    41   5.0250      0.00     0.20       0.00     0.07
    42   5.0251      0.00     0.34       0.00     0.22
    43   5.0304      0.00     0.14       0.00    -0.05
    44   6.1328      0.00     0.53       0.00     0.34
    45   6.1329      0.00     0.32       0.00    -0.10
    46   6.1330      0.00     0.10       0.00    -0.03
    47   7.0266      0.00    -0.63       0.00     0.60
    48   7.0267      0.00    -0.62       0.00     0.56
    49   7.0310      0.00     0.14       0.00     0.11
    50   7.0313      0.00     0.14       0.00    -0.06
    51  18.0218      0.00     0.18       0.00    -0.06
    52  19.0566      0.00    -0.00       0.00    -0.18
    53  19.0567      0.00     0.26       0.00    -0.03
    54  19.0567      0.00     0.07       0.00    -0.16
    55  19.0567      0.00    -0.25       0.00     0.26
    56  19.9905      0.00     0.11       0.00    -0.03
    57  19.9905      0.00     0.03       0.00    -0.20
    58  19.9906      0.00     0.17       0.00    -0.21
    59  19.9906      0.00     0.03       0.00    -0.08
    60  20.0231      0.00     0.60       0.00    -0.17
    61  20.0232      0.00     0.27       0.00    -0.07
    62  20.0232      0.00     0.14       0.00    -0.14
    63  20.0232      0.00     0.29       0.00    -0.02
    64  21.0362      0.00     0.15       0.00    -0.01
    65  21.1864      0.00    -0.37       0.00     0.15
    66  21.8226      0.00     0.08       0.00     0.05
    67  21.8226      0.00     0.41       0.00     0.05
    68  22.8766      0.00     0.20       0.00    -0.13
    69  25.0417      0.00    -0.06       0.00     0.22
    70  25.0418      0.00    -0.39       0.00    -0.16
    71  25.0418      0.00    -0.31       0.00    -0.09
    72  25.0418      0.00    -0.14       0.00    -0.24
    73  25.0471      0.00    -0.09       0.00     0.04
    74  25.0472      0.00     0.13       0.00     0.16
    75  25.0472      0.00     0.01       0.00     0.21
    76  25.0553      0.00     0.05       0.00    -0.11
    77  25.0553      0.00    -0.06       0.00     0.02
    78  25.0553      0.00     0.06       0.00     0.07
    79  25.0554      0.00    -0.02       0.00     0.13
    80  25.0607      0.00     0.12       0.00     0.08
    81  25.0607      0.00    -0.24       0.00     0.06
    82  25.0608      0.00    -0.22       0.00     0.16
    83  25.0608      0.00     0.04       0.00    -0.22
    84  25.0688      0.00    -0.12       0.00     0.14
    85  25.0689      0.00    -0.22       0.00    -0.09
    86  25.0798      0.00     0.06       0.00    -0.00
    87  25.1099      0.00    -0.34       0.00    -0.06
    88  25.1100      0.00    -0.09       0.00    -0.05
    89  25.1127      0.00    -0.09       0.00     0.31
    90  25.1373      0.00    -0.11       0.00    -0.24
    91  25.1374      0.00    -0.27       0.00     0.14
    92  25.1374      0.00    -0.07       0.00     0.06
    93  25.1374      0.00     0.14       0.00     0.06
    94  25.2139      0.00     0.00       0.00    -0.17
    95  26.1613      0.00     0.49       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.

16684    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.803    43.803    43.803
ecceobj         0.047     0.047     0.047
incobj          3.755     3.755     3.755
qmin           41.396    41.407    41.394
qmax           47.064    47.095    47.077
amean          44.132    44.132    44.132
amin           43.789    43.788    43.791
amax           44.487    44.487    44.486
emean           0.044     0.044     0.044
emin            0.028     0.028     0.028
emax            0.058     0.059     0.058
imean           3.391     3.391     3.391
imin            2.721     2.720     2.721
imax            3.934     3.934     3.934
excite_mean     0.074     0.074     0.074
fracstop        1.000     1.000     1.000
cjmean          3.096     3.096     3.096

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       184.2     184.4     184.3
kozaiamp        180.0     179.9     179.9