Orbit Fit and Astrometric record for 09DK143

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: 09DK143   
# Created Fri Mar 29 01:13:16 2024
# Orbit generated from Bernstein formalism
# Fitting     13 observations of     13
# Arc:  32.96d
# First observation: 2009/02/18
#  Last observation: 2009/03/23
Preliminary a, adot, b, bdot, g, gdot:
   0.000000   0.032007  -0.000001   0.001195   0.027568   0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit:     2.25 DOF:     21 RMS:  0.07
# Min/Max residuals:    -0.11    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.632838E-05  2.898249E-02  1.290099E-06  1.335416E-03  2.696821E-02  3.349513E-03
# Covariance matrix:
  5.4898E-13  3.4160E-10 -2.0964E-13 -1.6007E-11  6.7902E-11  5.1434E-09
  3.4160E-10  7.4942E-07 -3.9882E-10 -3.6433E-08  1.3735E-07  6.2234E-06
 -2.0964E-13 -3.9882E-10  4.0251E-13  1.6646E-11 -7.3726E-11 -3.6082E-09
 -1.6007E-11 -3.6433E-08  1.6646E-11  1.8687E-09 -6.6610E-09 -2.9441E-07
  6.7902E-11  1.3735E-07 -7.3726E-11 -6.6610E-09  2.5290E-08  1.1945E-06
  5.1434E-09  6.2234E-06 -3.6082E-09 -2.9441E-07  1.1945E-06  7.7266E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
   10.157717 -177.130859    0.541834    0.146707   -0.818783  2454881.095146
# Heliocentric elements and errors
Epoch:              2454880.5000  =  2009/02/18
Mean Anomaly:           32.85297 +/-    47.476
Argument of Peri:       29.81976 +/-    75.652
Long of Asc Node:      107.98323 +/-     0.664
Inclination:            10.32440 +/-     0.034
Eccentricity:         0.15751867 +/-    0.2711
Semi-Major Axis:     43.23329366 +/-    5.5307
Time of Perihelion: 2445405.0904 +/-   13571.6
Perihelion:          36.42324266 +/-   12.6113
Aphelion:            50.04334467 +/-   13.3536
Period (y)              284.2730 +/-     54.55
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.30922262 +/-    0.2150
Ecliptic Y           -1.33243274 +/-    0.0108
Ecliptic Z            6.53955511 +/-    0.0386
Ecliptic XDOT        -0.00015780 +/-    0.0009
Ecliptic YDOT        -0.00295093 +/-    0.0001
Ecliptic ZDOT         0.00019331 +/-    0.0002
# Distances at JD0 (AU)
Heliocenter to KBO   37.90144127 +/-    0.2117
Geocenter to KBO     37.08070047 +/-    0.2187
# Hcoef:  8.90

The following table shows the complete astrometric record for 09DK143. 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 (09DK143) followed by the observatory code and reference code for the source of the astrometry.

2009 02  18.594380 12 26 46.197  +08 10 32.07  24.5i 09DK143   568  C~0aRQ      
2009 02  18.632292 12 26 46.047  +08 10 33.64  24.2i 09DK143   568  C~0aRQ      
2009 02  19.490393 12 26 42.868  +08 11 03.74  24.1i 09DK143   568  C~0aRQ      
2009 02  19.530496 12 26 42.720  +08 11 05.30  24.2i 09DK143   568  C~0aRQ      
2009 02  22.598773 12 26 30.913  +08 12 53.97  25.8g 09DK143   568  C~0aRQ      
2009 02  23.489931 12 26 27.392  +08 13 25.94  25.0g 09DK143   568  C~0aRQ      
2009 02  23.546087 12 26 27.160  +08 13 27.93  25.1g 09DK143   568  C~0aRQ      
2009 02  23.601690 12 26 26.929  +08 13 29.92  25.4g 09DK143   568  C~0aRQ      
2009 02  26.471081 12 26 15.258  +08 15 12.79        09DK143   568  C~0aRQ      
2009 02  26.494902 12 26 15.147  +08 15 13.76        09DK143   568  C~0aRQ      
2009 03  23.439060 12 24 19.713  +08 29 49.91        09DK143   568  C~0aRQ      
2009 03  23.494565 12 24 19.438  +08 29 51.86        09DK143   568  C~0aRQ      
2009 03  23.551236 12 24 19.151  +08 29 53.50        09DK143   568  C~0aRQ      

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     0.14       0.00    -0.10
     2   0.0001     -2.67    -0.05       0.54     0.07
     3   0.0025    -57.98    -0.03       9.17    -0.05
     4   0.0026    -60.62    -0.00       9.72     0.12
     5   0.0110   -264.79     0.01      38.91    -0.11
     6   0.0134   -325.50    -0.02      47.23     0.03
     7   0.0136   -329.45    -0.05      47.67    -0.01
     8   0.0137   -333.39    -0.10      48.12    -0.02
     9   0.0216   -533.36     0.15      72.85     0.02
    10   0.0216   -535.26    -0.03      73.08     0.07
    11   0.0899  -2455.93    -0.01     189.82    -0.01
    12   0.0901  -2460.45    -0.02     189.97     0.12
    13   0.0902  -2465.01     0.02     189.77    -0.11

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.

09DK143    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