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 Mon Dec 18 02:36:57 2017
# Orbit generated from Bernstein formalism
# Fitting   28 observations of   29
# Arc:  17.09y
# First observation: 1999/02/10
#  Last observation: 2016/03/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.003926   0.026360   0.003272  -0.013653   0.031528   0.000000
# Chi-squared of fit:    84.24 DOF:   50 RMS:  0.31
# Min/Max residuals:    -0.67    0.69
# Exact a, adot, b, bdot, g, gdot:
  1.685574E-05  2.134220E-02 -9.805172E-06 -1.118724E-02  2.216435E-02 -9.845288E-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:              2451210.5000  =  1999/02/01
Mean Anomaly:          350.45139 +/-     0.004
Argument of Peri:      236.86565 +/-     0.003
Long of Asc Node:      345.17710 +/-     0.000
Inclination:            27.83398 +/-     0.000
Eccentricity:         0.67418394 +/-    0.0001
Semi-Major Axis:    114.95591083 +/-    0.0283
Time of Perihelion: 2463151.2909 +/-       0.5
Perihelion:          37.45448241 +/-    0.0123
Aphelion:           192.45733925 +/-    0.0481
Period (y)             1232.5517 +/-      0.46
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -44.37754032 +/-    0.0009
Ecliptic Y           12.18844481 +/-    0.0002
Ecliptic Z            0.22684192 +/-    0.0000
Ecliptic XDOT         0.00049089 +/-    0.0000
Ecliptic YDOT        -0.00284922 +/-    0.0000
Ecliptic ZDOT        -0.00138801 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.02147031 +/-    0.0008
Geocenter to KBO     45.11750480 +/-    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    -0.34       0.00     0.38
  2   0.0001     -2.39    -0.20      -0.46     0.18
  3   0.0059   -131.21     0.06     -13.37     0.32
  4   0.0060   -134.45    -0.19     -13.75     0.26
  5   0.2350  -4803.50    -0.67    -548.72    -0.20
  6   0.2352  -4805.41    -0.64    -549.19    -0.15
  7   0.8901   6134.90     0.29   -2061.61    -0.10
  8   0.8902   6134.07     0.16   -2061.96    -0.21
  9   0.8903   6133.11     0.07   -2062.37    -0.32
 10   0.8927   6114.49    -0.33   -2068.26    -0.24
 11   0.8929   6113.98     0.08   -2068.59    -0.27
 12   0.8930   6112.70    -0.28   -2069.02    -0.40
 13   1.1304   1312.77 (   0.95)  -2639.16 (  -0.39)
 14   1.1304   1312.00     0.69   -2639.27    -0.44
 15   1.1304   1311.06     0.17   -2639.34    -0.47
 16   1.1305   1309.82     0.57   -2639.09    -0.05
 17   1.1305   1309.22     0.44   -2638.81     0.28
 18   1.1305   1308.90     0.63   -2638.83     0.32
 19   2.0365   8122.14    -0.05   -4803.50     0.23
 20   2.0390   8059.66    -0.26   -4809.62     0.51
 21   2.0394   8050.75    -0.04   -4810.87     0.24
 22   9.2261  38583.81     0.18  -23538.60     0.16
 23   9.2261  38583.22    -0.16  -23539.18    -0.41
 24   9.2289  38537.18     0.16  -23538.25     0.42
 25   9.2313  38498.35     0.02  -23538.41     0.05
 26   9.2313  38497.74    -0.30  -23538.55    -0.09
 27   9.2314  38495.65    -0.11  -23538.40     0.08
 28  17.0864  93002.18    -0.04  -50316.03     0.05
 29  17.0866  92997.96     0.05  -50316.65    -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       115.187   115.273   115.102
ecceobj         0.674     0.675     0.674
incobj         27.809    27.810    27.809
qmin           36.079    36.277    36.301
qmax          204.496   204.039   204.330
amean         117.015   117.014   117.027
amin          114.439   114.530   114.436
amax          120.908   120.813   120.959
emean           0.681     0.679     0.679
emin            0.671     0.667     0.668
emax            0.692     0.690     0.690
imean          28.445    28.682    28.592
imin           28.135    28.285    28.292
imax           28.914    29.402    29.231
excite_mean     0.831     0.831     0.831
fracstop        1.000     1.000     1.000
cjmean          2.797     2.797     2.798

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       279.2     279.5     273.6
kozaiamp         41.2      43.2      39.6