Orbit Fit and Astrometric record for 99CH154

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: 99CH154   
# Created Thu Oct 19 01:37:01 2017
# Orbit generated from Bernstein formalism
# Fitting   12 observations of   12
# Arc:  16.09y
# First observation: 1999/02/12
#  Last observation: 2015/03/16
Preliminary a, adot, b, bdot, g, gdot:
   0.000104   0.023688  -0.000017   0.000287   0.025684   0.000000
# Chi-squared of fit:    18.96 DOF:   18 RMS:  0.22
# Min/Max residuals:    -0.40    0.47
# Exact a, adot, b, bdot, g, gdot:
  1.594420E-05  2.285770E-02  1.179582E-06  2.767720E-04  2.381572E-02  1.526249E-04
# Covariance matrix:
  6.8284E-13  5.1136E-14 -3.7417E-15  7.7709E-16  1.1609E-12  1.4208E-13
  5.1136E-14  5.4295E-13 -7.9472E-15  6.7837E-15  1.0259E-12  1.3818E-12
 -3.7417E-15 -7.9472E-15  1.6905E-13 -1.2850E-14 -2.0861E-14 -2.0235E-14
  7.7709E-16  6.7837E-15 -1.2850E-14  3.5157E-15  1.2846E-14  1.7376E-14
  1.1609E-12  1.0259E-12 -2.0861E-14  1.2846E-14  4.0843E-12  2.5834E-12
  1.4208E-13  1.3818E-12 -2.0235E-14  1.7376E-14  2.5834E-12  3.5401E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.478139  130.724530   -0.218265   -0.008309   -0.969441  2451221.790693
# Heliocentric elements and errors
Epoch:              2451220.5000  =  1999/02/11
Mean Anomaly:           92.89623 +/-     0.858
Argument of Peri:      231.63977 +/-     0.819
Long of Asc Node:      164.78462 +/-     0.005
Inclination:             0.84056 +/-     0.000
Eccentricity:         0.01469646 +/-    0.0001
Semi-Major Axis:     42.91255590 +/-    0.0126
Time of Perihelion: 2424725.0933 +/-     244.3
Perihelion:          42.28189318 +/-    0.0130
Aphelion:            43.54321861 +/-    0.0134
Period (y)              281.1155 +/-      0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -28.18382567 +/-    0.0023
Ecliptic Y           32.41249679 +/-    0.0027
Ecliptic Z           -0.35035212 +/-    0.0000
Ecliptic XDOT        -0.00200475 +/-    0.0000
Ecliptic YDOT        -0.00169188 +/-    0.0000
Ecliptic ZDOT         0.00003167 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.95370443 +/-    0.0025
Geocenter to KBO     41.98907554 +/-    0.0036
# Hcoef:  7.68

The following table shows the complete astrometric record for 99CH154. 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 (99CH154) followed by the observatory code and reference code for the source of the astrometry.

1999 02  12.28995  08 52 09.81   +17 05 06.1   23.5R 99CH154   568  Ca4208      
1999 02  12.38212  08 52 09.39   +17 05 08.1   23.5R 99CH154   568  Ca4208      
1999 03  16.24594  08 49 58.49   +17 14 09.9   23.5R 99CH154   568  Ca4208      
1999 03  16.27012  08 49 58.41   +17 14 10.3   23.5R 99CH154   568  Ca4208      
2000 04  05.30314  08 54 22.15   +16 57 38.0   24.1R 99CH154   568  Cb1943      
2000 04  05.40522  08 54 21.98   +16 57 38.7   24.1R 99CH154   568  Cb1943      
2000 04  06.37495  08 54 20.46   +16 57 45.8   24.1R 99CH154   568  Cb1943      
2000 04  07.32321  08 54 19.07   +16 57 52.4   24.1R 99CH154   568  Cb1943      
2001 03  24.20123  09 00 02.52   +16 34 55.7   22.6R 99CH154   695  Cc7487      
2001 03  24.30328  09 00 02.25   +16 34 56.9         99CH154   695  Cc7487      
2015 03  16.14795  10 11 49.77   +10 56 23.3   24.2R 99CH154   G37  C~1N5b      
2015 03  16.21631  10 11 49.50   +10 56 24.2         99CH154   G37  C~1N5b      

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    -0.16       0.00    -0.21
  2   0.0003     -6.34     0.14       0.29     0.07
  3   0.0875  -1959.09     0.04      15.14    -0.40
  4   0.0876  -1960.30     0.01      15.21    -0.34
  5   1.1445   1948.43    -0.03      86.82    -0.05
  6   1.1447   1945.89     0.01      86.83    -0.07
  7   1.1474   1922.97    -0.07      87.68     0.03
  8   1.1500   1901.98     0.04      88.56     0.17
  9   2.1106   7025.49    -0.11     135.41     0.44
 10   2.1109   7021.42     0.12     135.48     0.47
 11  16.0872  76135.80    -0.26     963.52     0.25
 12  16.0874  76131.21     0.26     962.92    -0.36

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.

99CH154    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.038    43.076    43.000
ecceobj         0.015     0.015     0.015
incobj          0.842     0.842     0.842
qmin           41.180    41.223    41.126
qmax           45.133    45.166    45.137
amean          43.076    43.114    43.038
amin           42.745    42.781    42.713
amax           43.407    43.453    43.374
emean           0.024     0.024     0.024
emin            0.003     0.003     0.003
emax            0.040     0.040     0.041
imean           2.147     2.121     2.173
imin            1.107     1.108     1.105
imax            2.864     2.837     2.890
excite_mean     0.045     0.044     0.045
fracstop        1.000     1.000     1.000
cjmean          3.088     3.088     3.087

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       195.7     196.2     196.6
kozaiamp        180.0     179.9     180.0