Orbit Fit and Astrometric record for 99OD4

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: 99OD4     
# Created Fri Mar 29 01:10:00 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     44 observations of     44
# Arc:  22.15y
# First observation: 1999/07/19
#  Last observation: 2021/09/12
# Chi-squared of fit:    83.78 DOF:     82 RMS:  0.24
# Min/Max residuals:    -0.46    0.75
# Exact a, adot, b, bdot, g, gdot:
  9.794360E-06  2.019821E-02  1.403487E-06  5.178206E-03  2.301000E-02 -1.162042E-03
# Covariance matrix:
  7.1513E-14 -1.3070E-14  2.9703E-15 -3.1029E-15  5.3466E-14 -2.7157E-14
 -1.3070E-14  1.5710E-14 -3.6141E-15  3.9534E-15  1.2772E-14  3.3416E-14
  2.9703E-15 -3.6141E-15  4.6816E-14 -3.7444E-15 -1.3723E-15 -8.1307E-15
 -3.1029E-15  3.9534E-15 -3.7444E-15  1.6830E-15  1.9912E-15  8.8597E-15
  5.3466E-14  1.2772E-14 -1.3723E-15  1.9912E-15  2.1913E-13  1.3718E-14
 -2.7157E-14  3.3416E-14 -8.1307E-15  8.8597E-15  1.3718E-14  7.5105E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.687526  -55.688409    0.148455    0.011796   -1.003144  2451378.919813
# Heliocentric elements and errors
Epoch:              2451378.5000  =  1999/07/19
Mean Anomaly:          225.03047 +/-     0.030
Argument of Peri:      144.68188 +/-     0.022
Long of Asc Node:      301.50995 +/-     0.000
Inclination:            14.39070 +/-     0.000
Eccentricity:         0.09387095 +/-    0.0000
Semi-Major Axis:     41.54387810 +/-    0.0029
Time of Perihelion: 2488046.9206 +/-      10.5
Perihelion:          37.64411484 +/-    0.0032
Aphelion:            45.44364135 +/-    0.0037
Period (y)              267.7742 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.94709797 +/-    0.0005
Ecliptic Y          -36.80479099 +/-    0.0007
Ecliptic Z            0.52156641 +/-    0.0000
Ecliptic XDOT         0.00189955 +/-    0.0000
Ecliptic YDOT         0.00148353 +/-    0.0000
Ecliptic ZDOT         0.00061447 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.46600745 +/-    0.0007
Geocenter to KBO     43.45943221 +/-    0.0009
# Hcoef:  7.21

The following table shows the complete astrometric record for 99OD4. 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 (99OD4) followed by the observatory code and reference code for the source of the astrometry.

1999 07  19.41907  20 25 53.00   -18 30 47.9   23.4R 99OD4     568  Ca6755      
1999 07  19.44678  20 25 52.85   -18 30 48.3         99OD4     568  Ca6755      
1999 07  19.47521  20 25 52.71   -18 30 48.9         99OD4     568  Ca6755      
1999 08  06.16666  20 24 28.84   -18 34 45.3         99OD4     807  Ca6755      
1999 08  06.17234  20 24 28.81   -18 34 44.7         99OD4     807  Ca6755      
1999 08  06.17802  20 24 28.79   -18 34 45.1         99OD4     807  Ca6755      
1999 08  06.26267  20 24 28.37   -18 34 46.5         99OD4     807  Ca6755      
1999 08  06.26823  20 24 28.33   -18 34 46.8         99OD4     807  Ca6755      
1999 08  06.27391  20 24 28.32   -18 34 46.5         99OD4     807  Ca6755      
1999 08  07.16469  20 24 24.16   -18 34 58.6         99OD4     807  Ca6755      
1999 08  07.23817  20 24 23.83   -18 34 59.2         99OD4     807  Ca6755      
1999 08  07.24393  20 24 23.78   -18 34 59.7         99OD4     807  Ca6755      
1999 08  07.24962  20 24 23.74   -18 34 59.4         99OD4     807  Ca6755      
2000 06  07.52960  20 33 01.44   -17 49 38.0         99OD4     568  Cb5150      
2000 06  07.56054  20 33 01.36   -17 49 38.3         99OD4     568  Cb5150      
2000 06  08.56817  20 32 58.47   -17 49 44.7         99OD4     568  Cb5150      
2000 07  24.08177  20 29 53.79   -17 58 04.8         99OD4     809  Cb7609      
2000 07  24.09600  20 29 53.72   -17 58 05.1   23.5R 99OD4     809  Cb7609      
2000 07  24.11602  20 29 53.62   -17 58 05.3   23.5R 99OD4     809  Cb7609      
2000 08  02.10854  20 29 10.95   -18 00 09.6         99OD4     809  Cb7609      
2000 08  02.15962  20 29 10.68   -18 00 10.6         99OD4     809  Cb7609      
2000 08  05.32778  20 28 55.78   -18 00 54.2   23.6R 99OD4     568  Cb7609      
2000 08  05.37175  20 28 55.57   -18 00 55.0         99OD4     568  Cb7609      
2000 08  05.41993  20 28 55.32   -18 00 55.6   23.6R 99OD4     568  Cb7609      
2000 08  06.31837  20 28 51.15   -18 01 08.0   23.1R 99OD4     568  Cb7609      
2000 08  06.36419  20 28 50.93   -18 01 08.5   23.2R 99OD4     568  Cb7609      
2000 08  06.40555  20 28 50.73   -18 01 09.2         99OD4     568  Cb7609      
2000 09  23.24918  20 25 52.66   -18 09 46.6   23.5R 99OD4     568  Cc0831      
2000 09  23.29902  20 25 52.54   -18 09 47.0   23.8R 99OD4     568  Cc0831      
2000 09  23.34696  20 25 52.43   -18 09 47.4   24.0R 99OD4     568  Cc0831      
2000 09  24.25098  20 25 50.44   -18 09 52.8   23.7R 99OD4     568  Cc0831      
2000 09  24.30045  20 25 50.32   -18 09 53.3   23.8R 99OD4     568  Cc0831      
2000 09  24.35897  20 25 50.18   -18 09 53.5   23.7R 99OD4     568  Cc0831      
2001 07  25.37212  20 34 13.78   -17 23 57.8   22.5R 99OD4     568  Cd2765      
2001 07  25.42968  20 34 13.50   -17 23 58.6   22.7R 99OD4     568  Cd2765      
2001 07  25.49457  20 34 13.18   -17 23 59.6   22.6R 99OD4     568  Cd2765      
2001 07  26.43385  20 34 08.74   -17 24 13.1         99OD4     568  Cd3195      
2013 10  07.13223  21 21 27.78   -10 21 16.0   22.3R 99OD4     695  C~0zdB      
2013 10  07.20671  21 21 27.58   -10 21 16.8         99OD4     695  C~0zdB      
2016 08  03.191389 21 38 29.82   -08 02 09.5         99OD4     W84  C~3i90      
2016 08  03.192350 21 38 29.82   -08 02 09.4         99OD4     W84  C~3i90      
2021 09  12.134850 21 57 06.346  -04 51 17.52  23.4G 99OD4     G37  C~552V      
2021 09  12.193730 21 57 06.106  -04 51 18.96        99OD4     G37  C~552V      
2021 09  12.251010 21 57 05.855  -04 51 20.23        99OD4     G37  C~552V      

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     0.75       0.00     0.63
     2   0.0001      0.00     0.49       0.00     0.60
     3   0.0002      0.00     0.44       0.00     0.37
     4   0.0486      0.00     0.14       0.00    -0.17
     5   0.0486      0.00     0.09       0.00     0.50
     6   0.0486      0.00     0.20       0.00     0.18
     7   0.0489      0.00    -0.06       0.00    -0.11
     8   0.0489      0.00    -0.26       0.00    -0.34
     9   0.0489      0.00    -0.01       0.00     0.03
    10   0.0513      0.00     0.00       0.00    -0.28
    11   0.0515      0.00     0.29       0.00     0.08
    12   0.0515      0.00    -0.05       0.00    -0.34
    13   0.0516      0.00    -0.25       0.00     0.03
    14   0.8874      0.00    -0.19       0.00     0.47
    15   0.8875      0.00    -0.04       0.00     0.36
    16   0.8902      0.00    -0.14       0.00     0.37
    17   1.0148      0.00     0.04       0.00    -0.21
    18   1.0149      0.00     0.01       0.00    -0.31
    19   1.0149      0.00    -0.04       0.00    -0.23
    20   1.0395      0.00    -0.09       0.00     0.01
    21   1.0397      0.00    -0.46       0.00    -0.27
    22   1.0483      0.00    -0.12       0.00     0.12
    23   1.0485      0.00    -0.13       0.00    -0.07
    24   1.0486      0.00    -0.43       0.00    -0.00
    25   1.0511      0.00     0.02       0.00    -0.04
    26   1.0512      0.00    -0.01       0.00     0.10
    27   1.0513      0.00    -0.06       0.00    -0.03
    28   1.1823      0.00     0.15       0.00     0.08
    29   1.1824      0.00     0.10       0.00    -0.02
    30   1.1826      0.00     0.12       0.00    -0.13
    31   1.1850      0.00     0.09       0.00    -0.17
    32   1.1852      0.00    -0.04       0.00    -0.39
    33   1.1853      0.00    -0.17       0.00    -0.26
    34   2.0177      0.00    -0.02       0.00    -0.13
    35   2.0178      0.00    -0.07       0.00    -0.11
    36   2.0180      0.00    -0.19       0.00    -0.19
    37   2.0206      0.00    -0.27       0.00    -0.36
    38  14.2196      0.00     0.32       0.00    -0.09
    39  14.2198      0.00    -0.13       0.00     0.12
    40  17.0425      0.00     0.14       0.00     0.18
    41  17.0425      0.00     0.21       0.00     0.30
    42  22.1512      0.00    -0.13       0.00    -0.10
    43  22.1513      0.00    -0.01       0.00    -0.14
    44  22.1515      0.00    -0.16       0.00    -0.05

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.

99OD4    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.482    41.482    41.482
ecceobj         0.095     0.095     0.095
incobj         14.405    14.405    14.405
qmin           36.544    36.538    36.560
qmax           46.656    46.643    46.689
amean          41.475    41.475    41.475
amin           41.143    41.141    41.145
amax           41.833    41.833    41.833
emean           0.099     0.099     0.099
emin            0.083     0.084     0.083
emax            0.116     0.116     0.117
imean          15.770    15.770    15.770
imin           14.897    14.903    14.896
imax           16.639    16.638    16.641
excite_mean     0.289     0.289     0.289
fracstop        1.000     1.000     1.000
cjmean          2.974     2.974     2.974

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       180.4     180.4     180.5
kozaiamp        180.0     180.0     180.0