Orbit Fit and Astrometric record for 99CZ118

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: 99CZ118   
# Created Fri Oct 19 01:07:35 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   29 observations of   29
# Arc:  17.09y
# First observation: 1999/02/10
#  Last observation: 2016/03/13
# Chi-squared of fit:   103.81 DOF:   52 RMS:  0.33
# Min/Max residuals:    -0.75    0.73
# Exact a, adot, b, bdot, g, gdot:
  1.702941E-05  2.134218E-02 -9.923282E-06 -1.118721E-02  2.216416E-02 -9.845391E-03
# Covariance matrix:
  9.7419E-14 -1.4419E-14 -6.2930E-15  4.6019E-15  1.9170E-14 -2.1319E-14
 -1.4419E-14  1.5459E-14  8.8717E-15 -6.7749E-15  3.4451E-14  3.1179E-14
 -6.2930E-15  8.8717E-15  8.5802E-14 -1.1423E-14  1.7513E-14  2.0371E-14
  4.6019E-15 -6.7749E-15 -1.1423E-14  4.8616E-15 -1.3939E-14 -1.5484E-14
  1.9170E-14  3.4451E-14  1.7513E-14 -1.3939E-14  1.8909E-13  6.3761E-14
 -2.1319E-14  3.1179E-14  2.0371E-14 -1.5484E-14  6.3761E-14  7.1310E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.288632  165.138911    0.397522    0.004361   -0.910231  2451219.933933
# Heliocentric elements and errors
Epoch:              2451220.5000  =  1999/02/11
Mean Anomaly:          350.46116 +/-     0.004
Argument of Peri:      236.86434 +/-     0.003
Long of Asc Node:      345.17710 +/-     0.000
Inclination:            27.83395 +/-     0.000
Eccentricity:         0.67421671 +/-    0.0001
Semi-Major Axis:    114.96879768 +/-    0.0283
Time of Perihelion: 2463151.0746 +/-     162.0
Perihelion:          37.45491270 +/-    0.0123
Aphelion:           192.48268267 +/-    0.0481
Period (y)             1232.7590 +/-      0.46
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -44.37791757 +/-    0.0009
Ecliptic Y           12.18853680 +/-    0.0002
Ecliptic Z            0.22683854 +/-    0.0000
Ecliptic XDOT         0.00049091 +/-    0.0000
Ecliptic YDOT        -0.00284925 +/-    0.0000
Ecliptic ZDOT        -0.00138802 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.02217928 +/-    0.0008
Geocenter to KBO     45.11824006 +/-    0.0009
# Hcoef:  7.87

The following table shows the complete astrometric record for 99CZ118. 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 (99CZ118) followed by the observatory code and reference code for the source of the astrometry.

1999 02  10.43319  11 05 43.05   +06 07 18.2   24.3R 99CZ118   568  Ca4013      
1999 02  10.47428  11 05 42.89   +06 07 18.7   24.3R 99CZ118   568  Ca4013      
1999 02  12.58336  11 05 34.59   +06 07 56.6   24.3R 99CZ118   568  Ca4013      
1999 02  12.63119  11 05 34.38   +06 07 57.5   24.3R 99CZ118   568  Ca4013      
1999 05  07.27921  11 00 31.64   +06 29 43.6   24.1R 99CZ118   568  Ca4843      
1999 05  07.35417  11 00 31.51   +06 29 43.9   24.1R 99CZ118   568  Ca4843      
2000 01  01.53995  11 11 08.16   +04 56 00.4         99CZ118   568  Ca8502      
2000 01  01.57371  11 11 08.10   +04 56 00.4   23.6R 99CZ118   568  Ca8502      
2000 01  01.61562  11 11 08.03   +04 56 00.4         99CZ118   568  Ca8502      
2000 01  02.50997  11 11 06.73   +04 56 02.2         99CZ118   568  Ca8502      
2000 01  02.55162  11 11 06.69   +04 56 02.1         99CZ118   568  Ca8502      
2000 01  02.59326  11 11 06.60   +04 56 02.2         99CZ118   568  Ca8502      
2000 03  29.29684  11 05 55.78   +05 18 16.9         99CZ118   568  Cb1942      
2000 03  29.30500  11 05 55.73   +05 18 17.1         99CZ118   568  Cb1942      
2000 03  29.31182  11 05 55.67   +05 18 17.4         99CZ118   568  Cb1942      
2000 03  29.33800  11 05 55.60   +05 18 18.1         99CZ118   568  Cb1942      
2000 03  29.34551  11 05 55.57   +05 18 18.6         99CZ118   568  Cb1943      
2000 03  29.35359  11 05 55.55   +05 18 18.7         99CZ118   568  Cb1943      
2001 02  23.25063  11 11 59.16   +04 01 05.7   24.1R 99CZ118   309  Cc6423      
2001 02  24.18469  11 11 55.16   +04 01 24.3         99CZ118   309  Cc6423      
2001 02  24.31901  11 11 54.58   +04 01 26.6   24.0R 99CZ118   309  Cc6423      
2008 05  03.26114  11 34 36.14   -03 54 58.7         99CZ118   695  Cz0373      
2008 05  03.26645  11 34 36.09   -03 54 59.0         99CZ118   695  Cz0373      
2008 05  04.28675  11 34 33.38   -03 54 41.4         99CZ118   695  Cz0373      
2008 05  05.16253  11 34 31.07   -03 54 27.4         99CZ118   695  Cz0373      
2008 05  05.16913  11 34 31.03   -03 54 27.3         99CZ118   695  Cz0373      
2008 05  05.21993  11 34 30.91   -03 54 26.4         99CZ118   695  Cz0373      
2016 03  13.25037  12 14 37.36   -14 58 33.9   23.8R 99CZ118   G37  C~1pPV      
2016 03  13.29876  12 14 37.12   -14 58 33.3         99CZ118   G37  C~1pPV      

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    -0.14       0.00     0.50
  2   0.0001      0.00    -0.09       0.00     0.27
  3   0.0059      0.00     0.20       0.00     0.30
  4   0.0060      0.00    -0.05       0.00     0.33
  5   0.2350      0.00    -0.75       0.00     0.13
  6   0.2352      0.00    -0.69       0.00     0.16
  7   0.8901      0.00     0.24       0.00    -0.18
  8   0.8902      0.00     0.09       0.00    -0.24
  9   0.8903      0.00    -0.04       0.00    -0.30
 10   0.8927      0.00    -0.38       0.00    -0.07
 11   0.8929      0.00    -0.01       0.00    -0.26
 12   0.8930      0.00    -0.40       0.00    -0.24
 13   1.1304      0.00     0.73       0.00    -0.70
 14   1.1304      0.00     0.47       0.00    -0.65
 15   1.1304      0.00    -0.02       0.00    -0.47
 16   1.1305      0.00     0.51       0.00    -0.25
 17   1.1305      0.00     0.52       0.00     0.12
 18   1.1305      0.00     0.71       0.00     0.07
 19   2.0365      0.00     0.08       0.00     0.24
 20   2.0390      0.00    -0.01       0.00     0.58
 21   2.0394      0.00     0.09       0.00     0.24
 22   9.2261      0.00     0.24       0.00     0.07
 23   9.2261      0.00    -0.29       0.00    -0.32
 24   9.2289      0.00     0.32       0.00     0.31
 25   9.2313      0.00     0.05       0.00     0.03
 26   9.2313      0.00    -0.29       0.00     0.02
 27   9.2314      0.00    -0.05       0.00     0.10
 28  17.0864      0.00     0.06       0.00     0.03
 29  17.0866      0.00     0.05       0.00    -0.16

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.

99CZ118    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       115.200   115.198   115.202
ecceobj         0.674     0.674     0.674
incobj         27.810    27.810    27.810
qmin           36.210    36.127    36.257
qmax          204.450   204.615   204.512
amean         116.987   117.021   117.043
amin          114.534   114.652   114.682
amax          120.877   120.926   120.972
emean           0.680     0.680     0.679
emin            0.666     0.667     0.668
emax            0.692     0.692     0.691
imean          28.547    28.598    28.641
imin           28.140    28.184    28.292
imax           29.540    29.478    29.460
excite_mean     0.831     0.831     0.831
fracstop        1.000     1.000     1.000
cjmean          2.797     2.796     2.797

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       277.7     280.3     277.3
kozaiamp         44.1      44.5      42.4