Orbit Fit and Astrometric record for 99CG154

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: 99CG154   
# Created Wed Oct 17 01:07:29 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   15 observations of   15
# Arc:   6.08y
# First observation: 1999/02/11
#  Last observation: 2005/03/10
# Chi-squared of fit:    92.84 DOF:   24 RMS:  0.44
# Min/Max residuals:    -0.83    0.70
# Exact a, adot, b, bdot, g, gdot:
  1.349199E-05  1.974052E-02 -3.391281E-06  2.370181E-04  2.216005E-02 -1.284393E-03
# Covariance matrix:
  4.9146E-13  2.6809E-13  6.8093E-16  3.5878E-15  1.1101E-12  2.4126E-12
  2.6809E-13  2.4435E-12 -5.4566E-15  2.9998E-14  3.5782E-12  1.9987E-11
  6.8093E-16 -5.4566E-15  1.9768E-13 -3.5861E-14 -4.5011E-15 -4.5327E-14
  3.5878E-15  2.9998E-14 -3.5861E-14  1.3202E-14  4.3740E-14  2.4672E-13
  1.1101E-12  3.5782E-12 -4.5011E-15  4.3740E-14  6.9848E-12  2.9200E-11
  2.4126E-12  1.9987E-11 -4.5327E-14  2.4672E-13  2.9200E-11  1.6437E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.373969  128.452642   -0.239765    0.006074   -0.964093  2451220.801793
# Heliocentric elements and errors
Epoch:              2451220.5000  =  1999/02/11
Mean Anomaly:          220.91207 +/-     0.393
Argument of Peri:      173.55814 +/-     0.369
Long of Asc Node:      100.64129 +/-     0.013
Inclination:             0.77694 +/-     0.000
Eccentricity:         0.09246011 +/-    0.0003
Semi-Major Axis:     42.94320899 +/-    0.0158
Time of Perihelion: 2490932.9883 +/-     117.5
Perihelion:          38.97267534 +/-    0.0183
Aphelion:            46.91374265 +/-    0.0206
Period (y)              281.4168 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -28.84145370 +/-    0.0033
Ecliptic Y           35.94423435 +/-    0.0042
Ecliptic Z            0.29438042 +/-    0.0000
Ecliptic XDOT        -0.00181287 +/-    0.0000
Ecliptic YDOT        -0.00163209 +/-    0.0000
Ecliptic ZDOT         0.00002825 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.08586991 +/-    0.0039
Geocenter to KBO     45.12632017 +/-    0.0054
# Hcoef:  7.38

The following table shows the complete astrometric record for 99CG154. 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 (99CG154) followed by the observatory code and reference code for the source of the astrometry.

1999 02  11.30105  08 43 54.98   +18 30 40.3   23.4R 99CG154   568  Ca4208      
1999 02  11.34301  08 43 54.77   +18 30 40.9   23.4R 99CG154   568  Ca4208      
1999 02  11.38316  08 43 54.59   +18 30 41.6   23.4R 99CG154   568  Ca4208      
1999 03  14.35297  08 41 53.68   +18 38 19.6   23.4R 99CG154   568  Ca4208      
1999 03  14.38705  08 41 53.58   +18 38 19.8   23.4R 99CG154   568  Ca4208      
2000 04  05.26554  08 45 37.11   +18 24 44.5   24.1R 99CG154   568  Cb1943      
2000 04  05.38182  08 45 36.96   +18 24 44.9   24.1R 99CG154   568  Cb1943      
2000 04  07.30404  08 45 34.41   +18 24 54.0   24.1R 99CG154   568  Cb1943      
2000 04  07.37797  08 45 34.32   +18 24 54.1   24.1R 99CG154   568  Cb1943      
2005 03  10.194618 09 09 42.52   +16 49 14.5         99CG154   645  C~1dbz      
2005 03  10.195451 09 09 42.52   +16 49 14.5         99CG154   645  C~1dbz      
2005 03  10.197940 09 09 42.51   +16 49 14.5         99CG154   645  C~1dbz      
2005 03  10.240174 09 09 42.32   +16 49 14.0         99CG154   645  C~1dbz      
2005 03  10.241007 09 09 42.32   +16 49 14.0         99CG154   645  C~1dc0      
2005 03  10.243495 09 09 42.31   +16 49 14.0         99CG154   645  C~1dc0      

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     0.38       0.00     0.66
  2   0.0001      0.00     0.11       0.00     0.53
  3   0.0002      0.00     0.18       0.00     0.53
  4   0.0850      0.00     0.00       0.00     0.18
  5   0.0851      0.00     0.11       0.00    -0.00
  6   1.1471      0.00    -0.20       0.00    -0.42
  7   1.1474      0.00     0.12       0.00    -0.59
  8   1.1526      0.00    -0.31       0.00    -0.62
  9   1.1528      0.00    -0.22       0.00    -0.83
 10   6.0750      0.00     0.26       0.00     0.70
 11   6.0750      0.00     0.31       0.00     0.68
 12   6.0750      0.00     0.30       0.00     0.64
 13   6.0751      0.00    -0.20       0.00    -0.52
 14   6.0751      0.00    -0.15       0.00    -0.54
 15   6.0751      0.00    -0.16       0.00    -0.58

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.

99CG154    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.059    43.059    43.059
ecceobj         0.090     0.090     0.090
incobj          0.778     0.778     0.778
qmin           38.398    38.443    38.407
qmax           48.074    48.067    48.055
amean          43.103    43.103    43.103
amin           42.741    42.744    42.747
amax           43.480    43.480    43.472
emean           0.084     0.084     0.084
emin            0.057     0.057     0.057
emax            0.106     0.106     0.106
imean           2.117     2.117     2.117
imin            0.800     0.800     0.800
imax            3.171     3.171     3.172
excite_mean     0.093     0.093     0.093
fracstop        1.000     1.000     1.000
cjmean          3.080     3.080     3.080

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       180.9     180.8     181.0
kozaiamp        179.9     180.0     180.0