Orbit Fit and Astrometric record for 90568

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: 90568     
# Created Sat Nov 29 02:36:40 2014
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   61 observations of   62
# Arc:  56.30y
# First observation: 1954/12/21
#  Last observation: 2011/04/11
# Chi-squared of fit:   482.61 DOF:  116 RMS:  0.50
# Min/Max residuals:    -1.24    2.09
# Exact a, adot, b, bdot, g, gdot:
  1.493282E-05  2.562835E-02 -7.780906E-06 -4.965294E-03  2.557423E-02 -1.056997E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
  -19.350849  130.092591    0.640571   -0.246183   -0.701238  2435097.949319
# Heliocentric elements and errors
Epoch:              2435098.5000  =  1954/12/22
Mean Anomaly:          318.64042 +/-     0.000
Argument of Peri:      288.45851 +/-     0.000
Long of Asc Node:      250.53316 +/-     0.000
Inclination:            21.96203 +/-     0.000
Eccentricity:         0.08100348 +/-    0.0000
Semi-Major Axis:     42.25025659 +/-    0.0000
Time of Perihelion: 2446622.8411 +/-       0.0
Perihelion:          38.82783892 +/-    0.0000
Aphelion:            45.67267425 +/-    0.0000
Period (y)              274.6327 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.75466243 +/-    0.0000
Ecliptic Y           29.20651908 +/-    0.0000
Ecliptic Z          -12.95664838 +/-    0.0000
Ecliptic XDOT        -0.00192256 +/-    0.0000
Ecliptic YDOT        -0.00198731 +/-    0.0000
Ecliptic ZDOT        -0.00046389 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.81434854 +/-    0.0000
Geocenter to KBO     39.10191599 +/-    0.0000
# Hcoef:  3.66

The following table shows the complete astrometric record for 90568. 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 (90568) followed by the observatory code and reference code for the source of the astrometry.

1954 12  21.44896  08 29 42.11   -00 58 05.8         90568     261   k8696      
1984 03  29.53430  11 10 18.98   -18 22 55.3         90568     260   k8696      
1993 03  18.56000  12 09 46.30   -22 32 56.1         90568     260   k8696      
1994 03  05.62595  12 17 33.77   -23 00 09.6         90568     260   k8696      
1994 05  08.47715  12 12 35.13   -22 23 00.0         90568     260   k8696      
1997 05  13.40209  12 32 21.63   -23 21 43.4         90568     260   k8696      
1997 05  13.46459  12 32 21.34   -23 21 41.4         90568     260   k8696      
2001 06  10.29860  12 58 05.79   -24 10 20.6   19.5R 90568     608  Cl3350      
2004 04  13.28947  13 22 27.14   -25 26 07.0   19.6  90568     644  Ck4431      
2004 04  13.31488  13 22 27.01   -25 26 06.2   19.4  90568     644  Ck4431      
2004 04  13.34609  13 22 26.82   -25 26 05.1   19.0  90568     644  Ck4431      
2004 04  13.94617  13 22 23.66   -25 25 46.9         90568     620  Ck4431      
2004 04  14.01370  13 22 23.26   -25 25 44.3         90568     620  Ck4431      
2004 04  14.18044  13 22 22.38   -25 25 39.5   19.4R 90568     H36  Ck4431      
2004 04  14.22510  13 22 22.22   -25 25 37.1   19.9R 90568     H36  Ck4431      
2004 04  14.23044  13 22 22.21   -25 25 37.5   18.8R 90568     333  Ck4431      
2004 04  14.23590  13 22 22.20   -25 25 36.9   20.3R 90568     448  Ck4431      
2004 04  14.23809  13 22 22.14   -25 25 37.7   18.5R 90568     333  Ck4431      
2004 04  14.24013  13 22 22.17   -25 25 36.6   19.9R 90568     854  Ck4431      
2004 04  14.24016  13 22 22.09   -25 25 36.9   20.1R 90568     H36  Ck4431      
2004 04  14.24238  13 22 22.14   -25 25 37.5   19.7R 90568     448  Ck4431      
2004 04  14.24786  13 22 22.24   -25 25 37.8   18.3R 90568     333  Ck4431      
2004 04  14.24887  13 22 22.08   -25 25 37.6   20.1R 90568     448  Ck4431      
2004 04  14.29726  13 22 21.88   -25 25 35.8   19.9R 90568     854  Ck4431      
2004 04  14.30757  13 22 21.81   -25 25 34.8   19.2R 90568     926  Ck4431      
2004 04  14.30905  13 22 21.83   -25 25 34.8   19.1  90568     644  Ck4431      
2004 04  14.33021  13 22 21.67   -25 25 33.7   18.9  90568     644  Ck4431      
2004 04  14.35148  13 22 21.56   -25 25 32.6   19.1  90568     644  Ck4431      
2004 04  14.35380  13 22 21.54   -25 25 33.1   19.2R 90568     926  Ck4431      
2004 04  19.96931  13 21 52.24   -25 22 26.4   19.8R 90568     620  Ck8696      
2004 04  20.60963  13 21 48.94   -25 22 03.6   19.8V 90568     360  Ck5196      
2004 04  20.63907  13 21 48.83   -25 22 02.8         90568     360  Ck5196      
2004 04  20.64627  13 21 48.79   -25 22 02.8         90568     360  Ck5196      
2004 04  22.02549  13 21 41.65   -25 21 14.2   19.8R 90568     620  Ck8696      
2004 04  26.93185  13 21 16.75   -25 18 18.3   20.0R 90568     620  Ck8696      
2004 04  27.97188  13 21 11.45   -25 17 39.3   19.3R 90568     620  Ck8696      
2004 05  11.35493  13 20 08.32   -25 09 01.0   19.4R 90568     568  Ck9591      
2004 05  11.44684  13 20 07.91   -25 08 57.4         90568     568  Ck9591      
2004 05  16.91884  13 19 44.65   -25 05 18.0         90568     620  Ck8696      
2004 05  26.01220  13 19 10.37   -24 59 11.3   19.0R 90568     304  Ck8696      
2004 05  26.04230  13 19 10.27   -24 59 10.1         90568     304  Ck8696      
2004 06  08.15829  13 18 32.08   -24 50 36.4   19.4R 90568     926  Ck8696      
2004 06  08.20980  13 18 31.95   -24 50 34.6   19.6R 90568     926  Ck8696      
2004 06  08.45467  13 18 31.37   -24 50 24.8   19.2R 90568     413  Ck8696      
2004 06  09.28756  13 18 29.49   -24 49 53.4   19.7R 90568     568  Ck9043      
2004 06  09.35183  13 18 29.34   -24 49 51.0         90568     568  Ck9043      
2004 06  09.88262  13 18 28.11   -24 49 31.2   20.4R 90568     620  Ck8696      
2011 04  11.28527  14 11 11.061  -26 12 42.20        90568     309  C~0X4X      
2011 04  11.28578  14 11 11.056  -26 12 42.20        90568     309  C~0X4X      
2011 04  11.28627  14 11 11.059  -26 12 42.25        90568     309  C~0X4X      
2011 04  11.28721  14 11 11.049  -26 12 42.13        90568     309  C~0X4X      
2011 04  11.28773  14 11 11.049  -26 12 42.16        90568     309  C~0X4X      
2011 04  11.28825  14 11 11.049  -26 12 42.21        90568     309  C~0X4X      
2011 04  11.28939  14 11 11.041  -26 12 42.14        90568     309  C~0X4X      
2011 04  11.29013  14 11 11.030  -26 12 42.10        90568     309  C~0X4X      
2011 04  11.29086  14 11 11.033  -26 12 42.11        90568     309  C~0X4X      
2011 04  11.29184  14 11 11.026  -26 12 42.05        90568     309  C~0X4X      
2011 04  11.29235  14 11 11.028  -26 12 42.08        90568     309  C~0X4X      
2011 04  11.29284  14 11 11.024  -26 12 42.10        90568     309  C~0X4X      
2011 04  11.29381  14 11 11.018  -26 12 42.02        90568     309  C~0X4X      
2011 04  11.29454  14 11 11.006  -26 12 41.96        90568     309  C~0X4X      
2011 04  11.29527  14 11 11.011  -26 12 41.98        90568     309  C~0X4X      

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    -0.22       0.00     0.98
  2  29.2706      0.00    -0.07       0.00    -0.17
  3  38.2399      0.00    -1.01       0.00     1.36
  4  39.2038      0.00     0.43       0.00     0.48
  5  39.3786      0.00    -0.31       0.00     0.09
  6  42.3928      0.00     2.09       0.00    -0.21
  7  42.3929      0.00     1.00       0.00    -0.91
  8  46.4691      0.00    -0.38       0.00    -0.85
  9  49.3110      0.00     0.17       0.00    -0.05
 10  49.3111      0.00     0.26       0.00    -0.05
 11  49.3111      0.00    -0.10       0.00     0.06
 12  49.3128      0.00    -0.41       0.00    -0.79
 13  49.3130      0.00    -1.01       0.00    -0.35
 14  49.3134      0.00    -1.24       0.00    -0.89
 15  49.3136      0.00    -0.08       0.00     0.09
 16  49.3136      0.00     0.14       0.00    -0.50
 17  49.3136      0.00     0.44       0.00    -0.07
 18  49.3136      0.00    -0.30       0.00    -0.95
 19  49.3136      0.00     0.32       0.00     0.09
 20  49.3136      0.00    -0.83       0.00    -0.19
 21  49.3136      0.00     0.06       0.00    -0.88
 22  49.3136      0.00 (   1.98)      0.00 (  -1.36)
 23  49.3136      0.00    -0.32       0.00    -1.19
 24  49.3138      0.00     0.53       0.00    -0.93
 25  49.3138      0.00     0.30       0.00    -0.27
 26  49.3138      0.00     0.70       0.00    -0.31
 27  49.3138      0.00    -0.01       0.00     0.11
 28  49.3139      0.00     0.04       0.00     0.53
 29  49.3139      0.00    -0.05       0.00    -0.05
 30  49.3293      0.00    -0.37       0.00    -0.38
 31  49.3310      0.00    -0.16       0.00     0.26
 32  49.3311      0.00     0.51       0.00     0.04
 33  49.3311      0.00     0.47       0.00    -0.22
 34  49.3349      0.00     0.06       0.00     0.15
 35  49.3483      0.00     0.63       0.00    -0.89
 36  49.3512      0.00    -0.78       0.00    -0.37
 37  49.3878      0.00     0.04       0.00     0.31
 38  49.3881      0.00     0.09       0.00     0.23
 39  49.4031      0.00    -0.40       0.00     0.23
 40  49.4280      0.00    -0.25       0.00     0.32
 41  49.4280      0.00    -0.15       0.00     0.31
 42  49.4640      0.00    -0.14       0.00     0.01
 43  49.4641      0.00    -0.21       0.00    -0.16
 44  49.4648      0.00    -0.36       0.00     0.14
 45  49.4670      0.00     0.04       0.00     0.24
 46  49.4672      0.00     0.05       0.00     0.20
 47  49.4687      0.00    -0.75       0.00     0.08
 48  56.3035      0.00     0.12       0.00     0.44
 49  56.3035      0.00     0.08       0.00     0.42
 50  56.3035      0.00     0.17       0.00     0.36
 51  56.3035      0.00     0.09       0.00     0.46
 52  56.3035      0.00     0.13       0.00     0.42
 53  56.3035      0.00     0.17       0.00     0.36
 54  56.3035      0.00     0.14       0.00     0.40
 55  56.3035      0.00     0.03       0.00     0.42
 56  56.3035      0.00     0.13       0.00     0.39
 57  56.3035      0.00     0.11       0.00     0.43
 58  56.3035      0.00     0.18       0.00     0.39
 59  56.3035      0.00     0.15       0.00     0.36
 60  56.3035      0.00     0.14       0.00     0.41
 61  56.3035      0.00     0.02       0.00     0.46
 62  56.3035      0.00     0.15       0.00     0.42

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.

90568    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.711    41.711    41.711
ecceobj         0.072     0.072     0.072
incobj         22.022    22.022    22.022
qmin           38.220    38.224    38.238
qmax           46.005    45.978    45.945
amean          41.994    41.998    41.989
amin           41.668    41.661    41.675
amax           42.333    42.340    42.334
emean           0.073     0.073     0.072
emin            0.060     0.060     0.059
emax            0.087     0.086     0.086
imean          23.494    23.494    23.494
imin           23.068    23.059    23.073
imax           23.882    23.889    23.891
excite_mean     0.405     0.405     0.405
fracstop        1.000     1.000     1.000
cjmean          2.877     2.877     2.877

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       174.6     174.5     174.5
kozaiamp        180.0     180.0     179.9