Orbit Fit and Astrometric record for 01KO77

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: 01KO77    
# Created Mon Dec 18 02:37:07 2017
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   27
# Arc:  15.02y
# First observation: 2001/05/23
#  Last observation: 2016/05/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.006199   0.030071  -0.001942   0.011295   0.021586   0.000000
# Chi-squared of fit:    32.84 DOF:   44 RMS:  0.20
# Min/Max residuals:    -0.49    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.584073E-05  2.762420E-02  5.781289E-06  1.037691E-02  2.712630E-02 -1.536440E-03
# Covariance matrix:
  2.8701E-13 -8.1768E-14  4.7333E-14 -2.6495E-14  1.9665E-13 -1.5016E-13
 -8.1768E-14  3.4737E-14 -2.2446E-14  1.2410E-14 -5.8260E-14  7.0100E-14
  4.7333E-14 -2.2446E-14  1.3743E-13 -1.9428E-14  3.4518E-14 -4.7811E-14
 -2.6495E-14  1.2410E-14 -1.9428E-14  6.4782E-15 -2.0914E-14  2.6420E-14
  1.9665E-13 -5.8260E-14  3.4518E-14 -2.0914E-14  5.0403E-13 -1.2093E-13
 -1.5016E-13  7.0100E-14 -4.7811E-14  2.6420E-14 -1.2093E-13  1.4921E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.456370 -120.820334   -0.051091   -0.043741   -1.016700  2452052.665493
# Heliocentric elements and errors
Epoch:              2452050.5000  =  2001/05/21
Mean Anomaly:          342.42501 +/-     0.013
Argument of Peri:       16.67491 +/-     0.017
Long of Asc Node:      245.57176 +/-     0.000
Inclination:            20.78760 +/-     0.000
Eccentricity:         0.14130140 +/-    0.0001
Semi-Major Axis:     43.65738750 +/-    0.0059
Time of Perihelion: 2457194.2240 +/-       3.8
Perihelion:          37.48853745 +/-    0.0063
Aphelion:            49.82623756 +/-    0.0077
Period (y)              288.4661 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -19.34369024 +/-    0.0005
Ecliptic Y          -32.52446217 +/-    0.0008
Ecliptic Z           -1.57975398 +/-    0.0000
Ecliptic XDOT         0.00244234 +/-    0.0000
Ecliptic YDOT        -0.00133169 +/-    0.0000
Ecliptic ZDOT         0.00105322 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.87498666 +/-    0.0008
Geocenter to KBO     36.86458655 +/-    0.0010
# Hcoef:  7.57

The following table shows the complete astrometric record for 01KO77. 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 (01KO77) followed by the observatory code and reference code for the source of the astrometry.

2001 05  23.16475  15 45 33.57   -22 22 17.4   22.5R 01KO77    807  Ce6595      
2001 05  23.22862  15 45 33.21   -22 22 15.9         01KO77    807  Ce6595      
2001 06  12.11955  15 43 48.17   -22 14 27.9   22.9  01KO77    304  Ce6595      
2001 06  12.24378  15 43 47.57   -22 14 24.9         01KO77    304  Ce6595      
2001 08  19.01992  15 41 11.58   -21 55 57.1   21.2R 01KO77    807  Ch1324      
2001 08  20.01676  15 41 12.68   -21 55 51.0         01KO77    807  Ch1324      
2001 08  21.02434  15 41 13.96   -21 55 45.2         01KO77    807  Ch1324      
2003 05  31.39073  15 59 18.27   -21 49 11.2   23.7R 01KO77    568  Cn3253      
2003 05  31.45532  15 59 17.89   -21 49 09.8         01KO77    568  Cn3253      
2005 04  14.34392  16 17 37.28   -21 28 33.2   23.2R 01KO77    304  Cn3253      
2005 04  14.36780  16 17 37.19   -21 28 32.5         01KO77    304  Cn3253      
2005 05  12.45334  16 15 25.83   -21 20 22.6   24.0g 01KO77    568  C~0VDP      
2005 05  12.47962  16 15 25.70   -21 20 22.3   23.9g 01KO77    568  C~0VDP      
2005 05  12.51092  16 15 25.53   -21 20 21.6   24.1g 01KO77    568  C~0VDP      
2005 05  13.53432  16 15 20.04   -21 20 02.0   23.9g 01KO77    568  C~0VDP      
2005 06  07.07939  16 13 05.47   -21 11 54.6   23.3R 01KO77    304  Cn6472      
2005 06  07.09563  16 13 05.39   -21 11 54.3         01KO77    304  Cn6472      
2006 05  31.36304  16 20 56.14   -20 55 01.5   23.5r 01KO77    568  C~0VDP      
2006 05  31.39811  16 20 55.94   -20 55 00.6   23.7r 01KO77    568  C~0VDP      
2006 05  31.43376  16 20 55.75   -20 55 00.1   23.2r 01KO77    568  C~0VDP      
2006 06  02.43669  16 20 44.68   -20 54 22.1   23.4r 01KO77    568  C~0VDP      
2015 06  12.27108  17 23 33.26   -17 10 20.1   22.2R 01KO77    695  C~1hTQ      
2015 06  12.32404  17 23 32.97   -17 10 19.3         01KO77    695  C~1hTQ      
2015 06  12.34659  17 23 32.84   -17 10 19.3         01KO77    695  C~1hTQ      
2016 05  29.32384  17 31 39.870  -16 43 21.97  22.0R 01KO77    G37              
2016 05  29.37104  17 31 39.582  -16 43 21.65        01KO77    G37              
2016 05  29.42970  17 31 39.278  -16 43 20.99        01KO77    G37              

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     0.05       0.00     0.06
  2   0.0002     -5.20     0.01       0.36     0.05
  3   0.0546  -1530.42     0.06     133.37    -0.04
  4   0.0550  -1539.21     0.37     134.44     0.12
  5   0.2405  -3901.66    -0.14     725.31    -0.49
  6   0.2433  -3888.14    -0.33     734.74    -0.40
  7   0.2460  -3872.11     0.26     744.43    -0.13
  8   2.0212  10803.49 (   1.32)   4345.90 (  -0.56)
  9   2.0213  10798.01 (   1.03)   4346.22 (  -0.63)
 10   3.8937  25773.24     0.07    8419.05     0.04
 11   3.8938  25771.87     0.04    8419.53     0.39
 12   3.9707  23852.11    -0.13    8585.46     0.15
 13   3.9707  23850.25     0.09    8585.44    -0.02
 14   3.9708  23847.75     0.07    8585.71     0.07
 15   3.9736  23767.71    -0.06    8591.62    -0.14
 16   4.0408  21805.37    -0.05    8739.40     0.01
 17   4.0409  21804.20     0.08    8739.50     0.01
 18   5.0218  28231.41    -0.19   10900.02     0.14
 19   5.0219  28228.44    -0.26   10900.44     0.37
 20   5.0220  28225.68    -0.08   10900.49     0.21
 21   5.0274  28063.28    -0.06   10912.00    -0.03
 22  14.0537  84115.87     0.11   32362.55    -0.33
 23  14.0538  84110.93     0.23   32362.95    -0.07
 24  14.0539  84108.74     0.19   32362.73    -0.35
 25  15.0175  92386.07     0.23   34955.02     0.38
 26  15.0177  92381.03    -0.37   34954.91     0.03
 27  15.0178  92375.70    -0.19   34955.16    -0.04

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.

01KO77    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.659    43.677    43.642
ecceobj         0.142     0.142     0.142
incobj         20.781    20.781    20.781
qmin           36.411    36.428    36.390
qmax           51.884    51.835    51.830
amean          43.950    43.965    43.933
amin           43.587    43.604    43.566
amax           44.370    44.368    44.328
emean           0.153     0.153     0.153
emin            0.137     0.137     0.137
emax            0.169     0.169     0.170
imean          21.903    21.908    21.897
imin           21.386    21.417    21.383
imax           22.389    22.392    22.381
excite_mean     0.403     0.403     0.403
fracstop        1.000     1.000     1.000
cjmean          2.901     2.901     2.901

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       172.2     171.4     173.1
kozaiamp        179.9     179.9     180.0