Orbit Fit and Astrometric record for 99OG4

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: 99OG4     
# Created Thu Oct 19 01:37:03 2017
# Orbit generated from Bernstein formalism
# Fitting   18 observations of   18
# Arc:   2.02y
# First observation: 1999/07/20
#  Last observation: 2001/07/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.000043   0.019396  -0.000003  -0.000442   0.021303   0.000000
# Chi-squared of fit:   118.07 DOF:   30 RMS:  0.45
# Min/Max residuals:    -1.08    1.03
# Exact a, adot, b, bdot, g, gdot:
  1.672156E-05  1.946984E-02 -3.166314E-06 -4.443136E-04  2.158427E-02  2.750374E-03
# Covariance matrix:
  3.7166E-13 -2.6995E-14  8.5705E-16 -3.6570E-15  9.0800E-13  4.0255E-12
 -2.6995E-14  1.3757E-12  5.6018E-15 -3.2004E-14  1.5955E-12  3.6468E-11
  8.5705E-16  5.6018E-15  1.8895E-13 -1.1732E-13  9.1987E-15  1.6733E-13
 -3.6570E-15 -3.2004E-14 -1.1732E-13  1.2912E-13 -4.6977E-14 -9.4622E-13
  9.0800E-13  1.5955E-12  9.1987E-15 -4.6977E-14  5.6064E-12  5.2894E-11
  4.0255E-12  3.6468E-11  1.6733E-13 -9.4622E-13  5.2894E-11  1.0771E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.558136  -45.691828    0.303882   -0.009663   -0.967285  2451379.938273
# Heliocentric elements and errors
Epoch:              2451370.5000  =  1999/07/11
Mean Anomaly:           83.94843 +/-     0.193
Argument of Peri:      103.76116 +/-     0.134
Long of Asc Node:      111.30017 +/-     0.017
Inclination:             1.41973 +/-     0.001
Eccentricity:         0.13013540 +/-    0.0016
Semi-Major Axis:     47.14946001 +/-    0.0201
Time of Perihelion: 2423794.9864 +/-      61.1
Perihelion:          41.01364609 +/-    0.0784
Aphelion:            53.28527393 +/-    0.0797
Period (y)              323.7601 +/-      0.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.82746462 +/-    0.0035
Ecliptic Y          -34.05435038 +/-    0.0036
Ecliptic Z           -0.45143257 +/-    0.0001
Ecliptic XDOT         0.00200711 +/-    0.0000
Ecliptic YDOT         0.00148436 +/-    0.0000
Ecliptic ZDOT        -0.00005971 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.30269554 +/-    0.0036
Geocenter to KBO     46.33002672 +/-    0.0051
# Hcoef:  7.75

The following table shows the complete astrometric record for 99OG4. 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 (99OG4) followed by the observatory code and reference code for the source of the astrometry.

1999 07  20.43753  21 07 46.42   -17 04 18.6   23.9R 99OG4     568  Ca7327      
1999 07  20.47712  21 07 46.27   -17 04 18.8         99OG4     568  Ca7327      
1999 07  20.50501  21 07 46.18   -17 04 19.4         99OG4     568  Ca7327      
1999 08  09.35816  21 06 22.14   -17 10 33.3   24.0R 99OG4     675  Ca7327      
1999 08  09.36561  21 06 22.10   -17 10 33.1   24.3R 99OG4     675  Ca7327      
1999 08  09.39086  21 06 21.99   -17 10 33.6   24.4R 99OG4     675  Ca7327      
1999 08  09.39830  21 06 21.95   -17 10 33.9   24.3R 99OG4     675  Ca7327      
2000 08  03.13689  21 11 15.09   -16 50 43.3   24.3R 99OG4     809  Cb9102      
2000 08  03.19255  21 11 14.84   -16 50 44.5   24.0R 99OG4     809  Cb9102      
2000 08  03.22041  21 11 14.72   -16 50 44.9   24.0R 99OG4     809  Cb9102      
2000 08  08.16523  21 10 53.56   -16 52 19.4   23.8R 99OG4     809  Cb9102      
2000 08  08.21307  21 10 53.36   -16 52 21.1   23.9R 99OG4     809  Cb9102      
2000 08  08.26056  21 10 53.15   -16 52 22.1   24.1R 99OG4     809  Cb9102      
2001 06  27.30744  21 18 01.32   -16 21 28.9         99OG4     304  Cd2765      
2001 07  25.57906  21 16 18.64   -16 29 34.6         99OG4     568  Cd2765      
2001 07  27.53970  21 16 10.55   -16 30 11.8         99OG4     568  Cd2765      
2001 07  27.58526  21 16 10.36   -16 30 13.3   24.1R 99OG4     568  Cd2765      
2001 07  27.61963  21 16 10.22   -16 30 13.8   24.1R 99OG4     568  Cd2765      

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    -0.51       0.00     0.59
  2   0.0001     -2.12    -0.16       0.43     1.03
  3   0.0002     -3.53     0.17       0.23     0.83
  4   0.0545  -1264.92     0.13      -8.50    -1.08
  5   0.0546  -1265.41     0.13      -8.14    -0.72
  6   0.0546  -1267.06     0.13      -8.16    -0.75
  7   0.0546  -1267.70    -0.02      -8.29    -0.87
  8   1.0396   3101.68     0.08     -97.01     0.33
  9   1.0397   3097.90    -0.08     -97.10     0.25
 10   1.0398   3096.13    -0.02     -96.97     0.37
 11   1.0533   2777.95     0.20     -97.77     0.84
 12   1.0535   2774.70     0.08     -98.55     0.06
 13   1.0536   2771.53     0.01     -98.61    -0.02
 14   1.9380   9204.39     0.44    -168.59     0.22
 15   2.0154   7646.74    -0.24    -185.53    -0.23
 16   2.0208   7524.42    -0.04    -186.00     0.09
 17   2.0209   7521.36    -0.20    -186.61    -0.53
 18   2.0210   7519.29    -0.09    -186.48    -0.40

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.

99OG4    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        47.063    47.123    47.004
ecceobj         0.130     0.133     0.127
incobj          1.420     1.420     1.420
qmin           40.147    40.080    40.237
qmax           54.369    54.635    54.143
amean          47.067    47.129    47.006
amin           46.665    46.719    46.612
amax           47.521    47.605    47.460
emean           0.130     0.133     0.127
emin            0.117     0.120     0.114
emax            0.145     0.148     0.142
imean           0.610     0.623     0.602
imin            0.128     0.131     0.127
imax            0.946     0.973     0.932
excite_mean     0.130     0.133     0.128
fracstop        1.000     1.000     1.000
cjmean          3.119     3.118     3.119

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       184.4     184.7     183.8
kozaiamp        180.0     180.0     180.0