Orbit Fit and Astrometric record for 99OC4

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: 99OC4     
# Created Thu Dec 14 02:37:00 2017
# Orbit generated from Bernstein formalism
# Fitting   22 observations of   24
# Arc:   2.02y
# First observation: 1999/07/18
#  Last observation: 2001/07/25
Preliminary a, adot, b, bdot, g, gdot:
   0.000017   0.026036  -0.000001  -0.000086   0.025234   0.000000
# Chi-squared of fit:    18.42 DOF:   38 RMS:  0.16
# Min/Max residuals:    -0.38    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.496164E-05  2.617144E-02 -5.494334E-07 -8.646375E-05  2.534184E-02  3.717878E-03
# Covariance matrix:
  2.4148E-13 -3.4241E-13 -1.7391E-16  7.2531E-16 -1.2888E-13 -4.3103E-12
 -3.4241E-13  2.9050E-12  1.5450E-15 -9.4647E-15  2.8487E-12  5.3935E-11
 -1.7391E-16  1.5450E-15  2.0300E-13 -1.3922E-13  1.3869E-15  3.1046E-14
  7.2531E-16 -9.4647E-15 -1.3922E-13  1.4289E-13 -9.6619E-15 -1.8524E-13
 -1.2888E-13  2.8487E-12  1.3869E-15 -9.6619E-15  3.2146E-12  5.4452E-11
 -4.3103E-12  5.3935E-11  3.1046E-14 -1.8524E-13  5.4452E-11  1.0582E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.179563  -43.993101    0.362807   -0.019733   -0.946988  2451378.033663
# Heliocentric elements and errors
Epoch:              2451370.5000  =  1999/07/11
Mean Anomaly:           40.48534 +/-     0.141
Argument of Peri:      204.21120 +/-     0.271
Long of Asc Node:       55.61511 +/-     0.040
Inclination:             1.16992 +/-     0.000
Eccentricity:         0.17266464 +/-    0.0011
Semi-Major Axis:     45.71091714 +/-    0.0135
Time of Perihelion: 2438675.7657 +/-      44.0
Perihelion:          37.81825806 +/-    0.0506
Aphelion:            53.60357622 +/-    0.0518
Period (y)              309.0567 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.82047271 +/-    0.0020
Ecliptic Y          -28.31932363 +/-    0.0019
Ecliptic Z           -0.81233013 +/-    0.0001
Ecliptic XDOT         0.00224923 +/-    0.0000
Ecliptic YDOT         0.00176387 +/-    0.0000
Ecliptic ZDOT        -0.00001756 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.41365633 +/-    0.0020
Geocenter to KBO     39.46043114 +/-    0.0028
# Hcoef:  8.26

The following table shows the complete astrometric record for 99OC4. 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 (99OC4) followed by the observatory code and reference code for the source of the astrometry.

1999 07  18.53292  21 15 20.02   -17 09 51.6   23.7R 99OC4     568  Ca6755      
1999 07  18.56035  21 15 19.87   -17 09 52.3         99OC4     568  Ca6755      
1999 07  18.58696  21 15 19.76   -17 09 52.8         99OC4     568  Ca6755      
1999 07  20.47047  21 15 11.18   -17 10 33.1   24.0R 99OC4     568  Ca6755      
1999 07  20.49830  21 15 11.03   -17 10 33.4         99OC4     568  Ca6755      
1999 07  20.52528  21 15 10.91   -17 10 34.1         99OC4     568  Ca6755      
1999 08  07.17330  21 13 46.22   -17 16 59.5         99OC4     807  Ca6755      
1999 08  07.35260  21 13 45.29   -17 17 02.9         99OC4     807  Ca6755      
2000 08  05.46359  21 19 49.94   -16 49 50.7         99OC4     568  Cb7609      
2000 08  05.50507  21 19 49.75   -16 49 52.0   23.8R 99OC4     568  Cb7609      
2000 08  05.54662  21 19 49.53   -16 49 52.8         99OC4     568  Cb7609      
2000 08  06.45166  21 19 45.11   -16 50 13.0         99OC4     568  Cb7609      
2000 08  06.49431  21 19 44.91   -16 50 14.2   23.6R 99OC4     568  Cb7609      
2000 08  06.53623  21 19 44.71   -16 50 15.1   23.7R 99OC4     568  Cb7609      
2000 09  23.32603  21 16 16.28   -17 05 33.5   24.5R 99OC4     568  Cc0831      
2000 09  23.37426  21 16 16.12   -17 05 34.0   24.6R 99OC4     568  Cc0831      
2000 09  23.40063  21 16 16.01   -17 05 34.5   24.1R 99OC4     568  Cc0831      
2000 09  24.25800  21 16 13.31   -17 05 45.7   24.2R 99OC4     568  Cc0831      
2000 09  24.30741  21 16 13.16   -17 05 46.6   24.9R 99OC4     568  Cc0831      
2000 09  24.36601  21 16 12.95   -17 05 47.2   24.1R 99OC4     568  Cc0831      
2001 07  24.50248  21 26 42.00   -16 18 00.2   23.3R 99OC4     568  Cd2765      
2001 07  24.55348  21 26 41.76   -16 18 01.4   23.8R 99OC4     568  Cd2765      
2001 07  24.59528  21 26 41.56   -16 18 02.2   23.7R 99OC4     568  Cd2765      
2001 07  25.60612  21 26 36.94   -16 18 24.7         99OC4     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     0.28       0.00     0.10
  2   0.0001     -2.26    -0.08      -0.02     0.08
  3   0.0001     -3.91     0.11      -0.03     0.08
  4   0.0053   -133.30    -0.00      -1.66    -0.27
  5   0.0054   -135.44    -0.18      -1.31     0.09
  6   0.0055   -137.30    -0.13      -1.46    -0.06
  7   0.0538  -1410.38 (   1.21)     -7.17 (   0.46)
  8   0.0543  -1424.11 (   0.92)     -6.45 (   1.12)
  9   1.0511   4054.32    -0.03     -25.59     0.04
 10   1.0513   4051.33     0.08     -25.99    -0.38
 11   1.0514   4048.08    -0.07     -25.79    -0.19
 12   1.0539   3981.45    -0.11     -25.68     0.06
 13   1.0540   3978.35    -0.01     -25.94    -0.23
 14   1.0541   3975.34     0.11     -25.93    -0.23
 15   1.1849    846.76     0.20       4.20     0.19
 16   1.1851    844.42     0.22       4.41     0.32
 17   1.1851    842.77    -0.14       4.41     0.27
 18   1.1875    802.48    -0.04       5.36     0.20
 19   1.1876    800.16     0.01       5.15    -0.09
 20   1.1878    797.10    -0.23       5.48     0.14
 21   2.0177  10287.05    -0.05     -39.67    -0.04
 22   2.0179  10283.39    -0.10     -39.73    -0.09
 23   2.0180  10280.40    -0.13     -39.59     0.05
 24   2.0207  10210.01     0.29     -40.14    -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.

99OC4    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.618    45.658    45.578
ecceobj         0.171     0.174     0.168
incobj          1.170     1.170     1.170
qmin           37.214    37.079    37.302
qmax           54.348    54.508    54.118
amean          45.564    45.611    45.492
amin           45.175    45.213    45.061
amax           46.014    46.066    45.966
emean           0.163     0.168     0.163
emin            0.147     0.151     0.148
emax            0.181     0.184     0.178
imean           1.477     1.487     1.263
imin            0.551     0.532     0.381
imax            2.269     2.277     1.906
excite_mean     0.166     0.170     0.165
fracstop        1.000     1.000     1.000
cjmean          3.087     3.085     3.086

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       173.9     169.2     174.4
kozaiamp        180.0     180.0     180.0