Orbit Fit and Astrometric record for 99CY118

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: 99CY118   
# Created Fri Oct 20 01:37:01 2017
# Orbit generated from Bernstein formalism
# Fitting   31 observations of   31
# Arc:  17.09y
# First observation: 1999/02/10
#  Last observation: 2016/03/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.005767   0.041931  -0.002929   0.020074   0.030107   0.000000
# Chi-squared of fit:    87.97 DOF:   56 RMS:  0.30
# Min/Max residuals:    -0.71    0.66
# Exact a, adot, b, bdot, g, gdot:
  2.133037E-05  3.548133E-02  9.353902E-06  1.696803E-02  2.929284E-02 -3.491178E-03
# Covariance matrix:
  1.1561E-13 -3.1474E-14  1.1460E-14 -1.2920E-14  5.7037E-14 -3.7318E-14
 -3.1474E-14  3.3809E-14 -1.3992E-14  1.5994E-14  6.2531E-15  4.6465E-14
  1.1460E-14 -1.3992E-14  7.3661E-14 -1.1499E-14 -2.4764E-15 -1.9753E-14
 -1.2920E-14  1.5994E-14 -1.1499E-14  8.6699E-15  3.2561E-15  2.2581E-14
  5.7037E-14  6.2531E-15 -2.4764E-15  3.2561E-15  1.4897E-13  9.9741E-15
 -3.7318E-14  4.6465E-14 -1.9753E-14  2.2581E-14  9.9741E-15  6.5607E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.105120  163.963105    0.378824    0.001460   -0.918178  2451219.929933
# Heliocentric elements and errors
Epoch:              2451210.5000  =  1999/02/01
Mean Anomaly:          357.15255 +/-     0.001
Argument of Peri:       14.97239 +/-     0.001
Long of Asc Node:      163.12677 +/-     0.000
Inclination:            25.63950 +/-     0.000
Eccentricity:         0.61132788 +/-    0.0001
Semi-Major Axis:     89.05455192 +/-    0.0155
Time of Perihelion: 2453638.4332 +/-       0.2
Perihelion:          34.61302152 +/-    0.0082
Aphelion:           143.49608231 +/-    0.0255
Period (y)              840.4123 +/-      0.22
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.57916943 +/-    0.0004
Ecliptic Y           10.04793409 +/-    0.0001
Ecliptic Z            0.06295432 +/-    0.0000
Ecliptic XDOT        -0.00060142 +/-    0.0000
Ecliptic YDOT        -0.00326914 +/-    0.0000
Ecliptic ZDOT         0.00158531 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.05032899 +/-    0.0004
Geocenter to KBO     34.13803403 +/-    0.0004
# Hcoef:  8.66

The following table shows the complete astrometric record for 99CY118. 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 (99CY118) followed by the observatory code and reference code for the source of the astrometry.

1999 02  10.42919  11 01 04.04   +06 24 21.3   23.7R 99CY118   568  Ca4013      
1999 02  10.47084  11 01 03.86   +06 24 23.0   23.7R 99CY118   568  Ca4013      
1999 02  12.51626  11 00 54.55   +06 25 41.6   23.7R 99CY118   568  Ca4013      
1999 02  12.62000  11 00 54.08   +06 25 46.1   23.7R 99CY118   568  Ca4013      
1999 03  16.31767  10 58 18.26   +06 47 22.1   23.7R 99CY118   568  Ca4506      
1999 03  16.37706  10 58 17.97   +06 47 24.6   23.7R 99CY118   568  Ca4506      
1999 04  12.46594  10 56 20.86   +07 04 03.5   23.8R 99CY118   568  Ca4843      
1999 04  13.39699  10 56 17.60   +07 04 32.8   23.8R 99CY118   568  Ca4843      
1999 04  13.46932  10 56 17.36   +07 04 35.3   23.8R 99CY118   568  Ca4843      
1999 05  06.35630  10 55 19.53   +07 14 17.0   23.9R 99CY118   568  Ca4843      
1999 05  06.42368  10 55 19.42   +07 14 18.3   23.9R 99CY118   568  Ca4843      
1999 05  07.29317  10 55 18.18   +07 14 34.3   23.9R 99CY118   568  Ca4843      
2000 01  01.54824  11 12 05.91   +06 10 53.0   23.8R 99CY118   568  Ca8502      
2000 01  01.58737  11 12 05.86   +06 10 53.8   23.7R 99CY118   568  Ca8502      
2000 01  01.62923  11 12 05.81   +06 10 54.6   23.6R 99CY118   568  Ca8502      
2000 01  02.52541  11 12 04.80   +06 11 12.5         99CY118   568  Ca8502      
2000 01  02.56512  11 12 04.74   +06 11 12.8         99CY118   568  Ca8502      
2000 01  02.62563  11 12 04.67   +06 11 14.3         99CY118   568  Ca8502      
2000 04  06.44618  11 05 44.01   +07 08 18.5   24.1R 99CY118   568  Cb1942      
2000 04  06.48453  11 05 43.84   +07 08 19.5   24.1R 99CY118   568  Cb1942      
2002 03  14.27024  11 25 57.07   +07 05 09.0         99CY118   696  Cf4341      
2002 03  14.30480  11 25 56.92   +07 05 09.7         99CY118   696  Cf4341      
2003 04  01.232696 11 33 47.29   +07 22 04.8         99CY118   645  C~1cF1      
2003 04  01.233525 11 33 47.28   +07 22 04.8         99CY118   645  C~1cF1      
2003 04  01.236013 11 33 47.27   +07 22 04.9         99CY118   645  C~1cF1      
2015 02  18.34490  13 26 52.09   +06 57 15.1   23.9R 99CY118   695  C~1M5z      
2015 02  18.43833  13 26 51.89   +06 57 19.5         99CY118   695  C~1M5z      
2015 02  18.52873  13 26 51.67   +06 57 23.4         99CY118   695  C~1M5z      
2016 03  13.26996  13 34 22.31   +07 11 13.3   24.0R 99CY118   G37  C~1pPV      
2016 03  13.31877  13 34 22.13   +07 11 15.6         99CY118   G37  C~1pPV      
2016 03  13.49156  13 34 21.46   +07 11 23.4         99CY118   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    -0.45       0.00    -0.04
  2   0.0001     -3.13    -0.33       0.54     0.12
  3   0.0057   -161.46    -0.03      19.71    -0.44
  4   0.0060   -169.66     0.02      21.17     0.08
  5   0.0928  -2811.27     0.20     326.19    -0.02
  6   0.0929  -2816.22     0.25     326.84     0.09
  7   0.1671  -4810.34    -0.01     581.90     0.21
  8   0.1697  -4866.41     0.16     590.41     0.07
  9   0.1699  -4870.67     0.31     591.36     0.38
 10   0.2325  -5889.05     0.24     800.06     0.45
 11   0.2327  -5891.07     0.16     800.64     0.45
 12   0.2351  -5914.25     0.28     808.38     0.33
 13   0.8901   9418.82     0.07    3077.55    -0.30
 14   0.8902   9417.82     0.00    3078.00    -0.27
 15   0.8903   9416.82     0.00    3078.44    -0.26
 16   0.8928   9395.93    -0.07    3089.07     0.37
 17   0.8929   9394.99     0.00    3089.00    -0.12
 18   0.8931   9393.44     0.00    3089.97     0.22
 19   1.1527   2830.54    -0.65    4042.64    -0.23
 20   1.1528   2827.82    -0.69    4042.58    -0.59
 21   3.0879  19595.61    -0.01   10980.87     0.16
 22   3.0880  19593.26     0.66   10980.62    -0.38
 23   4.1364  25706.21    -0.03   14758.46    -0.12
 24   4.1364  25706.07    -0.10   14758.40    -0.19
 25   4.1364  25705.89    -0.08   14758.43    -0.17
 26  16.0217 136069.49     0.29   65359.42    -0.21
 27  16.0219 136062.90     0.49   65362.21     0.32
 28  16.0222 136056.19     0.37   65364.24     0.18
 29  17.0865 144986.02    -0.71   71064.89    -0.24
 30  17.0866 144980.82    -0.44   71065.51    -0.01
 31  17.0871 144961.90     0.10   71066.96     0.15

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.

99CY118    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        89.465    89.512    89.418
ecceobj         0.613     0.613     0.613
incobj         25.623    25.623    25.623
qmin           32.456    31.885    31.588
qmax          151.889   153.607   152.837
amean          89.770    89.954    89.775
amin           87.756    86.135    87.305
amax           93.301    93.681    92.942
emean           0.620     0.627     0.628
emin            0.602     0.599     0.606
emax            0.638     0.646     0.647
imean          23.803    23.077    22.866
imin           22.528    21.510    20.999
imax           25.034    24.936    24.903
excite_mean     0.740     0.739     0.738
fracstop        1.000     1.000     1.000
cjmean          2.813     2.811     2.812

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       136.5     152.4     145.3
kozaiamp        116.9     146.1     134.8