Orbit Fit and Astrometric record for 09KY36

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: 09KY36    
# Created Fri Nov  1 01:08:54 2024
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:  28.07d
# First observation: 2009/05/27
#  Last observation: 2009/06/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000000   0.025775  -0.000001  -0.009491   0.026178   0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit:     1.20 DOF:     15 RMS:  0.06
# Min/Max residuals:    -0.14    0.10
# Exact a, adot, b, bdot, g, gdot:
  1.546012E-05  2.567992E-02 -5.702186E-06 -9.935681E-03  2.622911E-02 -6.505739E-04
# Covariance matrix:
  4.7883E-13  9.3143E-11  4.8770E-14  7.7343E-11  6.4677E-11  1.8550E-09
  9.3143E-11  4.3910E-08  1.5230E-11  3.8637E-08  2.8174E-08 -6.6542E-07
  4.8770E-14  1.5230E-11  2.7750E-13  1.9780E-13  1.2920E-11  3.8806E-09
  7.7343E-11  3.8637E-08  1.9780E-13  3.9279E-08  2.3231E-08 -2.7258E-06
  6.4677E-11  2.8174E-08  1.2920E-11  2.3231E-08  1.8644E-08  2.5575E-07
  1.8550E-09 -6.6542E-07  3.8806E-09 -2.7258E-06  2.5575E-07  9.1068E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   12.758276 -176.415283   -0.893948    0.104172   -0.460171  2454978.790973
# Heliocentric elements and errors
Epoch:              2454970.5000  =  2009/05/19
Mean Anomaly:          358.05976 +/-    48.728
Argument of Peri:      150.79615 +/-   175.772
Long of Asc Node:       33.98600 +/-     0.940
Inclination:            24.73044 +/-     0.641
Eccentricity:         0.07518715 +/-    0.0996
Semi-Major Axis:     41.72925483 +/-    2.7690
Time of Perihelion: 2455501.1550 +/-  210246.9
Perihelion:          38.59175118 +/-    4.8824
Aphelion:            44.86675847 +/-    5.1131
Period (y)              269.5685 +/-     26.83
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.52364105 +/-    0.1932
Ecliptic Y           -3.25121445 +/-    0.0121
Ecliptic Z            8.41941320 +/-    0.0438
Ecliptic XDOT         0.00001000 +/-    0.0031
Ecliptic YDOT        -0.00268132 +/-    0.0002
Ecliptic ZDOT        -0.00102660 +/-    0.0007
# Distances at JD0 (AU)
Heliocenter to KBO   38.59378903 +/-    0.1881
Geocenter to KBO     38.12557556 +/-    0.1985
# Hcoef:  9.02

The following table shows the complete astrometric record for 09KY36. 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 (09KY36) followed by the observatory code and reference code for the source of the astrometry.

2009 05  27.290207 12 33 36.740  +10 16 26.98  25.7g 09KY36    568  C~0aRU      
2009 05  27.339430 12 33 36.619  +10 16 26.57  25.3g 09KY36    568  C~0aRU      
2009 05  27.387392 12 33 36.498  +10 16 26.05  25.2g 09KY36    568  C~0aRU      
2009 05  28.296092 12 33 34.342  +10 16 16.76  25.3g 09KY36    568  C~0aRU      
2009 05  28.343589 12 33 34.226  +10 16 16.34  25.8g 09KY36    568  C~0aRU      
2009 05  29.247447 12 33 32.136  +10 16 06.38        09KY36    568  C~0aRU      
2009 06  22.285486 12 33 03.449  +10 08 22.36        09KY36    568  C~0aRU      
2009 06  24.285257 12 33 03.465  +10 07 26.97        09KY36    568  C~0aRU      
2009 06  24.311853 12 33 03.465  +10 07 26.13  24.6i 09KY36    568  C~0aRU      
2009 06  24.356061 12 33 03.472  +10 07 24.93  24.6i 09KY36    568  C~0aRV      

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     0.00       0.00    -0.06
     2   0.0001     -1.47     0.01      -1.10     0.03
     3   0.0003     -2.89     0.02      -2.29    -0.01
     4   0.0028    -28.26     0.07     -23.63     0.02
     5   0.0029    -29.66     0.03     -24.71     0.10
     6   0.0054    -53.87    -0.14     -46.26    -0.09
     7   0.0712   -254.29     0.09    -641.66     0.09
     8   0.0766   -231.75    -0.05    -692.26     0.00
     9   0.0767   -231.41    -0.03    -693.03    -0.08
    10   0.0768   -230.84     0.01    -694.08    -0.00

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.

09KY36    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0