Orbit Fit and Astrometric record for 99OH4

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: 99OH4     
# Created Fri Oct 19 01:07:40 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   22 observations of   22
# Arc:   7.04y
# First observation: 1999/07/18
#  Last observation: 2006/08/03
# Chi-squared of fit:    45.78 DOF:   38 RMS:  0.26
# Min/Max residuals:    -0.42    0.56
# Exact a, adot, b, bdot, g, gdot:
  1.424780E-05  2.383592E-02 -9.467423E-06 -1.277103E-02  2.635682E-02  4.062395E-04
# Covariance matrix:
  3.0254E-13 -7.8207E-14 -2.3519E-14  3.2149E-14  4.9272E-13 -3.3595E-13
 -7.8207E-14  1.8163E-13  6.8606E-14 -9.4405E-14  2.6678E-13  9.8617E-13
 -2.3519E-14  6.8606E-14  1.4594E-13 -6.1948E-14  1.0144E-13  3.9689E-13
  3.2149E-14 -9.4405E-14 -6.1948E-14  6.3342E-14 -1.4032E-13 -5.4611E-13
  4.9272E-13  2.6678E-13  1.0144E-13 -1.4032E-13  2.4153E-12  1.4654E-12
 -3.3595E-13  9.8617E-13  3.9689E-13 -5.4611E-13  1.4654E-12  5.7048E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.425757  -56.368253    0.153270    0.007209   -1.002655  2451377.922683
# Heliocentric elements and errors
Epoch:              2451378.5000  =  1999/07/19
Mean Anomaly:           11.71231 +/-     0.133
Argument of Peri:      166.41469 +/-     0.144
Long of Asc Node:      124.19176 +/-     0.000
Inclination:            28.16206 +/-     0.000
Eccentricity:         0.04075398 +/-    0.0002
Semi-Major Axis:     40.56266838 +/-    0.0095
Time of Perihelion: 2448308.5715 +/-      34.8
Perihelion:          38.90957822 +/-    0.0113
Aphelion:            42.21575854 +/-    0.0119
Period (y)              258.3438 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           21.44913011 +/-    0.0012
Ecliptic Y          -32.50721795 +/-    0.0019
Ecliptic Z            0.28159489 +/-    0.0000
Ecliptic XDOT         0.00208696 +/-    0.0000
Ecliptic YDOT         0.00133651 +/-    0.0000
Ecliptic ZDOT        -0.00132621 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.94692909 +/-    0.0017
Geocenter to KBO     37.94087286 +/-    0.0022
# Hcoef:  8.23

The following table shows the complete astrometric record for 99OH4. 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 (99OH4) followed by the observatory code and reference code for the source of the astrometry.

1999 07  18.42194  20 23 21.11   -18 55 38.3   23.8R 99OH4     568  Ca7327      
1999 07  18.44904  20 23 20.97   -18 55 38.8         99OH4     568  Ca7327      
1999 07  18.47602  20 23 20.82   -18 55 39.6         99OH4     568  Ca7327      
1999 08  11.20975  20 21 16.99   -19 05 34.4   23.4R 99OH4     675  Ca7327      
1999 08  11.24326  20 21 16.83   -19 05 35.2   23.6R 99OH4     675  Ca7327      
1999 08  11.27535  20 21 16.68   -19 05 36.2         99OH4     675  Ca7327      
2000 08  05.33559  20 28 04.25   -19 26 52.0         99OH4     568  Cb7609      
2000 08  05.38558  20 28 03.99   -19 26 53.4         99OH4     568  Cb7609      
2000 08  05.42668  20 28 03.78   -19 26 54.8         99OH4     568  Cb7609      
2000 08  06.32974  20 27 59.08   -19 27 17.6   24.5R 99OH4     568  Cb7609      
2000 08  06.37103  20 27 58.86   -19 27 18.7   24.7R 99OH4     568  Cb7609      
2000 08  06.41264  20 27 58.65   -19 27 19.8         99OH4     568  Cb7609      
2001 07  25.36541  20 35 25.28   -19 44 31.3   23.1R 99OH4     568  Cd2765      
2001 07  25.42296  20 35 24.98   -19 44 32.7   23.2R 99OH4     568  Cd2765      
2001 07  25.48101  20 35 24.66   -19 44 34.4   23.2R 99OH4     568  Cd2765      
2001 08  25.26370  20 32 48.44   -19 57 35.5   24.3R 99OH4     568  Ce3112      
2001 08  25.28439  20 32 48.33   -19 57 35.7   23.5R 99OH4     568  Ce3112      
2001 08  25.29802  20 32 48.26   -19 57 36.1   24.2R 99OH4     568  Ce3112      
2006 08  03.42995  21 06 50.16   -21 27 57.7   23.5R 99OH4     250  S~06AK      
2006 08  03.43435  21 06 50.13   -21 27 57.9         99OH4     250  S~06AK      
2006 08  03.43875  21 06 50.11   -21 27 58.0         99OH4     250  S~06AK      
2006 08  03.44314  21 06 50.08   -21 27 58.1         99OH4     250  S~06AK      

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     0.38
  2   0.0001      0.00     0.03       0.00     0.56
  3   0.0001      0.00    -0.07       0.00     0.44
  4   0.0651      0.00    -0.06       0.00     0.39
  5   0.0652      0.00     0.12       0.00     0.41
  6   0.0653      0.00     0.35       0.00     0.20
  7   1.0511      0.00     0.23       0.00     0.05
  8   1.0512      0.00     0.30       0.00    -0.07
  9   1.0513      0.00     0.41       0.00    -0.42
 10   1.0538      0.00     0.14       0.00    -0.25
 11   1.0539      0.00     0.11       0.00    -0.30
 12   1.0540      0.00     0.26       0.00    -0.34
 13   2.0204      0.00    -0.24       0.00    -0.28
 14   2.0205      0.00    -0.13       0.00    -0.14
 15   2.0207      0.00    -0.27       0.00    -0.29
 16   2.1050      0.00     0.08       0.00    -0.37
 17   2.1050      0.00    -0.12       0.00    -0.09
 18   2.1051      0.00    -0.21       0.00    -0.18
 19   7.0445      0.00     0.31       0.00     0.15
 20   7.0445      0.00     0.21       0.00     0.08
 21   7.0445      0.00     0.25       0.00     0.11
 22   7.0445      0.00     0.15       0.00     0.14

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.

99OH4    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.500    40.500    40.500
ecceobj         0.039     0.039     0.039
incobj         28.183    28.183    28.183
qmin           38.215    38.212    38.220
qmax           42.962    42.953    42.978
amean          40.520    40.520    40.520
amin           40.217    40.224    40.211
amax           40.833    40.826    40.839
emean           0.042     0.042     0.042
emin            0.032     0.032     0.031
emax            0.053     0.053     0.053
imean          26.694    26.694    26.694
imin           26.300    26.300    26.300
imax           27.095    27.101    27.088
excite_mean     0.451     0.451     0.451
fracstop        1.000     1.000     1.000
cjmean          2.814     2.814     2.814

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       187.7     187.8     187.6
kozaiamp        180.0     180.0     180.0