Orbit Fit and Astrometric record for 99CD158

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: 99CD158   
# Created Sat Apr 19 01:39:23 2014
# Orbit generated from Bernstein formalism
# Fitting   28 observations of   28
# Arc:   9.06y
# First observation: 1999/02/10
#  Last observation: 2008/03/03
Preliminary a, adot, b, bdot, g, gdot:
  -0.000216   0.016431  -0.000135   0.007833   0.020590   0.000000
# Chi-squared of fit:    77.16 DOF:   50 RMS:  0.29
# Min/Max residuals:    -0.55    0.73
# Exact a, adot, b, bdot, g, gdot:
  1.338449E-05  1.609229E-02  7.928622E-06  7.673824E-03  2.103307E-02 -1.807841E-03
# Covariance matrix:
  1.2668E-13 -6.0781E-14  1.3266E-14 -2.1793E-14 -4.7532E-15 -3.1603E-13
 -6.0781E-14  8.9737E-14 -2.4135E-14  3.9621E-14 -2.1624E-15  5.7483E-13
  1.3266E-14 -2.4135E-14  1.0749E-13 -2.4952E-14 -5.9358E-16 -1.6189E-13
 -2.1793E-14  3.9621E-14 -2.4952E-14  2.2225E-14  1.3040E-15  2.6585E-13
 -4.7532E-15 -2.1624E-15 -5.9358E-16  1.3040E-15  1.3191E-13  1.5774E-14
 -3.1603E-13  5.7483E-13 -1.6189E-13  2.6585E-13  1.5774E-14  3.8562E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.023291  118.608005   -0.384618    0.000154   -0.915704  2451219.781253
# Heliocentric elements and errors
Epoch:              2451210.5000  =  1999/02/01
Mean Anomaly:          223.90249 +/-     0.031
Argument of Peri:      146.15005 +/-     0.028
Long of Asc Node:      119.00607 +/-     0.000
Inclination:            25.50664 +/-     0.000
Eccentricity:         0.14320223 +/-    0.0001
Semi-Major Axis:     43.59201279 +/-    0.0026
Time of Perihelion: 2490953.1189 +/-       8.4
Perihelion:          37.34953945 +/-    0.0044
Aphelion:            49.83448614 +/-    0.0048
Period (y)              287.8184 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.53321975 +/-    0.0004
Ecliptic Y           42.35929891 +/-    0.0007
Ecliptic Z            0.01970060 +/-    0.0000
Ecliptic XDOT        -0.00172779 +/-    0.0000
Ecliptic YDOT        -0.00120092 +/-    0.0000
Ecliptic ZDOT         0.00099880 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   48.45743517 +/-    0.0007
Geocenter to KBO     47.54416715 +/-    0.0008
# Hcoef:  5.07

The following table shows the complete astrometric record for 99CD158. 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 (99CD158) followed by the observatory code and reference code for the source of the astrometry.

1999 02  10.28051  08 02 56.28   +20 27 43.6   21.1R 99CD158   568  Cb6454      
1999 02  10.33373  08 02 56.05   +20 27 44.4   21.1R 99CD158   568  Cb6454      
1999 02  10.37846  08 02 55.86   +20 27 45.2   21.1R 99CD158   568  Cb6454      
1999 02  17.23406  08 02 28.08   +20 29 36.4   21.1R 99CD158   568  Cb6454      
1999 02  17.27993  08 02 27.88   +20 29 37.1   21.1R 99CD158   568  Cb6454      
1999 03  08.23784  08 01 23.78   +20 34 06.1   21.1R 99CD158   568  Cb6454      
1999 03  08.25227  08 01 23.74   +20 34 06.6   21.1R 99CD158   568  Cb6454      
1999 04  08.24061  08 00 34.49   +20 38 40.8   21.9R 99CD158   568  Cb6454      
1999 04  09.23382  08 00 34.24   +20 38 45.6   21.9R 99CD158   568  Cb6454      
2000 01  10.50965  08 09 30.85   +20 32 49.2   21.5R 99CD158   568  Cb6454      
2000 01  10.54212  08 09 30.69   +20 32 50.0   22.3R 99CD158   568  Cb6454      
2000 04  04.28332  08 04 47.16   +20 52 51.2   22.5R 99CD158   568  Cb6454      
2000 04  04.36278  08 04 47.09   +20 52 51.7   22.6R 99CD158   568  Cb6454      
2000 04  05.31420  08 04 46.52   +20 52 56.9   22.6R 99CD158   568  Cb6454      
2000 11  28.47689  08 16 20.58   +20 35 00.4   21.5R 99CD158   695  Cc3589      
2000 11  29.45039  08 16 18.30   +20 35 13.0   21.4R 99CD158   695  Cc3589      
2000 11  29.54823  08 16 18.05   +20 35 14.2   21.6R 99CD158   695  Cc3589      
2003 12  04.48741  08 29 05.77   +21 14 27.9   21.2R 99CD158   568  Ck0653      
2003 12  04.55734  08 29 05.59   +21 14 29.0         99CD158   568  Ck0653      
2007 02  15.18362  08 37 27.32   +22 14 25.6   21.9R 99CD158   688  Cu2274      
2007 02  15.28111  08 37 26.90   +22 14 27.6         99CD158   688  Cu2274      
2007 02  16.28816  08 37 22.57   +22 14 46.2         99CD158   695  Cu2274      
2007 02  16.37103  08 37 22.21   +22 14 47.8         99CD158   695  Cu2274      
2007 02  16.47518  08 37 21.75   +22 14 49.7         99CD158   695  Cu2274      
2007 11  08.40968  08 47 11.95   +21 54 21.2         99CD158   695  Cy3962      
2007 11  09.40401  08 47 12.00   +21 54 30.7         99CD158   695  Cy3962      
2008 03  03.18597  08 40 48.05   +22 30 42.5         99CD158   695  Cy7583      
2008 03  03.23141  08 40 47.89   +22 30 43.1         99CD158   695  Cy7583      

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    -0.27       0.00    -0.45
  2   0.0001     -3.33    -0.29       0.13    -0.55
  3   0.0003     -6.10    -0.29       0.37    -0.49
  4   0.0190   -410.92    -0.01      30.04    -0.40
  5   0.0192   -413.81    -0.25      30.15    -0.49
  6   0.0711  -1350.01     0.45     111.93     0.04
  7   0.0711  -1350.66     0.40     112.31     0.35
  8   0.1559  -2083.12     0.19     242.41     0.07
  9   0.1587  -2087.52     0.26     246.41    -0.06
 10   0.9151   5359.74     0.17    1453.44     0.16
 11   0.9152   5357.37    -0.03    1453.74     0.33
 12   1.1472   1214.65     0.00    1794.25     0.71
 13   1.1474   1213.59    -0.19    1794.54     0.73
 14   1.1500   1204.70    -0.05    1797.98     0.70
 15   1.7993  10956.37    -0.05    2839.66    -0.21
 16   1.8020  10922.25     0.11    2844.79    -0.12
 17   1.8022  10918.55     0.00    2845.18    -0.21
 18   4.8137  20899.89    -0.13    7669.18     0.08
 19   4.8139  20897.16    -0.15    7669.63     0.08
 20   8.0134  26869.57    -0.30   12963.96    -0.06
 21   8.0137  26863.31    -0.21   12964.38     0.14
 22   8.0164  26799.26     0.15   12966.70     0.12
 23   8.0167  26793.92     0.16   12966.94     0.21
 24   8.0170  26787.13     0.04   12967.12     0.19
 25   8.7423  35233.84     0.21   14003.75    -0.52
 26   8.7450  35231.93     0.19   14013.25    -0.48
 27   9.0593  29363.30    -0.13   14663.95     0.08
 28   9.0594  29360.96     0.03   14663.94     0.04

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.

99CD158    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        43.703    43.703    43.703
ecceobj         0.141     0.141     0.141
incobj         25.465    25.465    25.465
qmin           35.693    35.695    35.614
qmax           52.238    52.041    52.256
amean          43.737    43.718    43.732
amin           43.251    43.251    43.250
amax           44.200    44.211    44.248
emean           0.150     0.150     0.152
emin            0.127     0.127     0.127
emax            0.183     0.181     0.184
imean          23.818    23.817    23.787
imin           23.021    23.015    23.045
imax           24.364    24.375    24.257
excite_mean     0.431     0.431     0.431
fracstop        1.000     1.000     1.000
cjmean          2.869     2.868     2.868

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       190.0     186.9     186.5
kozaiamp        180.0     180.0     180.0