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 Dec  3 02:08:28 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     37 observations of     37
# Arc:  18.06y
# First observation: 1999/02/10
#  Last observation: 2017/03/03
# Chi-squared of fit:    83.14 DOF:     68 RMS:  0.26
# Min/Max residuals:    -0.89    0.51
# Exact a, adot, b, bdot, g, gdot:
  2.116092E-05  3.548131E-02  9.412518E-06  1.696799E-02  2.929244E-02 -3.491384E-03
# Covariance matrix:
  1.0637E-13 -1.7562E-14  7.5069E-15 -6.1798E-15  6.1236E-14 -1.7514E-14
 -1.7562E-14  1.0828E-14 -5.8856E-15  4.9244E-15 -1.7240E-15  1.4141E-14
  7.5069E-15 -5.8856E-15  6.9160E-14 -7.4126E-15  9.2427E-16 -8.1974E-15
 -6.1798E-15  4.9244E-15 -7.4126E-15  3.0622E-15 -5.2425E-16  6.8611E-15
  6.1236E-14 -1.7240E-15  9.2427E-16 -5.2425E-16  1.4567E-13 -9.3251E-16
 -1.7514E-14  1.4141E-14 -8.1974E-15  6.8611E-15 -9.3251E-16  1.9709E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.105120  163.963105    0.378824    0.001460   -0.918179  2451219.929933
# Heliocentric elements and errors
Epoch:              2451220.5000  =  1999/02/11
Mean Anomaly:          357.16505 +/-     0.001
Argument of Peri:       14.97225 +/-     0.001
Long of Asc Node:      163.12676 +/-     0.000
Inclination:            25.63945 +/-     0.000
Eccentricity:         0.61139104 +/-    0.0001
Semi-Major Axis:     89.07016243 +/-    0.0154
Time of Perihelion: 2453638.4086 +/-      79.2
Perihelion:          34.61346287 +/-    0.0082
Aphelion:           143.52686199 +/-    0.0255
Period (y)              840.6333 +/-      0.22
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.57961609 +/-    0.0004
Ecliptic Y           10.04806849 +/-    0.0001
Ecliptic Z            0.06295718 +/-    0.0000
Ecliptic XDOT        -0.00060141 +/-    0.0000
Ecliptic YDOT        -0.00326918 +/-    0.0000
Ecliptic ZDOT         0.00158533 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.05086579 +/-    0.0004
Geocenter to KBO     34.13859600 +/-    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      
2009 02  22.62236  12 32 34.61   +07 10 34.0   24.7g 99CY118   568  C~59cS      
2009 02  23.51431  12 32 31.19   +07 11 14.1   24.3g 99CY118   568  C~59cS      
2009 02  23.56980  12 32 30.98   +07 11 16.5   24.4g 99CY118   568  C~59cS      
2009 02  23.62551  12 32 30.76   +07 11 18.9   24.5g 99CY118   568  C~59cS      
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      
2017 03  03.326123 13 43 37.22   +06 58 56.8         99CY118   W84  C~3i8v      
2017 03  03.327402 13 43 37.21   +06 58 56.7         99CY118   W84  C~3i8v      

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    -0.40       0.00     0.11
     2   0.0001      0.00    -0.23       0.00     0.21
     3   0.0057      0.00    -0.18       0.00    -0.42
     4   0.0060      0.00     0.07       0.00     0.04
     5   0.0928      0.00     0.16       0.00    -0.11
     6   0.0929      0.00     0.25       0.00    -0.02
     7   0.1671      0.00     0.02       0.00     0.20
     8   0.1697      0.00     0.13       0.00     0.01
     9   0.1699      0.00     0.39       0.00     0.24
    10   0.2325      0.00     0.33       0.00     0.34
    11   0.2327      0.00     0.26       0.00     0.37
    12   0.2351      0.00     0.32       0.00     0.22
    13   0.8901      0.00     0.02       0.00    -0.34
    14   0.8902      0.00    -0.03       0.00    -0.29
    15   0.8903      0.00    -0.02       0.00    -0.28
    16   0.8928      0.00     0.16       0.00     0.34
    17   0.8929      0.00     0.03       0.00    -0.15
    18   0.8931      0.00     0.17       0.00     0.17
    19   1.1527      0.00    -0.71       0.00     0.05
    20   1.1528      0.00    -0.89       0.00    -0.27
    21   3.0879      0.00     0.09       0.00     0.16
    22   3.0880      0.00     0.48       0.00    -0.60
    23   4.1364      0.00    -0.06       0.00    -0.08
    24   4.1364      0.00    -0.15       0.00    -0.11
    25   4.1364      0.00    -0.12       0.00    -0.10
    26  10.0348      0.00     0.01       0.00     0.07
    27  10.0372      0.00    -0.18       0.00     0.14
    28  10.0373      0.00    -0.03       0.00     0.04
    29  10.0375      0.00    -0.02       0.00    -0.06
    30  16.0217      0.00     0.24       0.00    -0.22
    31  16.0219      0.00     0.51       0.00     0.08
    32  16.0222      0.00     0.40       0.00     0.03
    33  17.0865      0.00    -0.34       0.00     0.14
    34  17.0866      0.00    -0.12       0.00     0.20
    35  17.0871      0.00     0.22       0.00     0.12
    36  18.0586      0.00    -0.30       0.00    -0.05
    37  18.0586      0.00    -0.39       0.00    -0.20

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        89.471    89.471    89.472
ecceobj         0.613     0.613     0.613
incobj         25.623    25.623    25.623
qmin           32.200    32.373    32.395
qmax          152.451   150.656   156.194
amean          89.861    89.496    91.926
amin           87.517    87.631    89.472
amax           93.071    92.256    94.807
emean           0.624     0.621     0.629
emin            0.605     0.602     0.607
emax            0.644     0.639     0.648
imean          23.389    23.639    23.866
imin           22.120    22.377    22.407
imax           24.893    25.131    25.063
excite_mean     0.740     0.739     0.748
fracstop        1.000     1.000     1.000
cjmean          2.812     2.811     2.811

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       144.5     138.8     135.1
kozaiamp        129.5     125.4     116.7