Orbit Fit and Astrometric record for 09DN143

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: 09DN143   
# Created Tue Oct 24 01:37:46 2017
# Orbit generated from Bernstein formalism
# Fitting   21 observations of   21
# Arc:   6.00y
# First observation: 2009/02/18
#  Last observation: 2015/02/18
Preliminary a, adot, b, bdot, g, gdot:
   0.000240   0.038098  -0.000016  -0.000028   0.033108   0.000000
# Chi-squared of fit:     3.40 DOF:   36 RMS:  0.07
# Min/Max residuals:    -0.19    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.869609E-05  3.684548E-02  9.963639E-08 -4.653669E-05  3.122346E-02 -3.378437E-03
# Covariance matrix:
  1.2194E-13  8.3182E-14 -1.5926E-15  4.0122E-16  1.8655E-13  4.5170E-13
  8.3182E-14  6.7212E-13 -6.6365E-15  1.1726E-15  7.7023E-13  3.0570E-12
 -1.5926E-15 -6.6365E-15  9.1845E-14 -1.7143E-14 -1.0462E-14 -3.0247E-14
  4.0122E-16  1.1726E-15 -1.7143E-14  1.2698E-14  2.4054E-15  5.2373E-15
  1.8655E-13  7.7023E-13 -1.0462E-14  2.4054E-15  1.2221E-12  3.5089E-12
  4.5170E-13  3.0570E-12 -3.0247E-14  5.2373E-15  3.5089E-12  1.4183E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   10.827135 -174.428104    0.580300    0.151310   -0.791119  2454881.106123
# Heliocentric elements and errors
Epoch:              2454880.5000  =  2009/02/18
Mean Anomaly:          332.94335 +/-     0.015
Argument of Peri:      129.59993 +/-     0.022
Long of Asc Node:       95.13399 +/-     0.001
Inclination:            10.56254 +/-     0.000
Eccentricity:         0.19850417 +/-    0.0001
Semi-Major Axis:     39.35064871 +/-    0.0060
Time of Perihelion: 2461656.8804 +/-       3.3
Perihelion:          31.53938072 +/-    0.0070
Aphelion:            47.16191670 +/-    0.0088
Period (y)              246.8517 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.16399334 +/-    0.0011
Ecliptic Y           -2.55992264 +/-    0.0001
Ecliptic Z            6.01621830 +/-    0.0002
Ecliptic XDOT         0.00060786 +/-    0.0000
Ecliptic YDOT        -0.00318410 +/-    0.0000
Ecliptic ZDOT        -0.00005976 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.82179998 +/-    0.0011
Geocenter to KBO     32.02720493 +/-    0.0011
# Hcoef:  9.15

The following table shows the complete astrometric record for 09DN143. 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 (09DN143) followed by the observatory code and reference code for the source of the astrometry.

2009 02  18.605357 12 37 41.261  +07 43 28.48  24.1i 09DN143   568  C~0aRQ      
2009 02  18.616290 12 37 41.215  +07 43 28.91        09DN143   568  C~0aRQ      
2009 02  18.642926 12 37 41.119  +07 43 29.91  24.2i 09DN143   568  C~0aRQ      
2009 02  18.654165 12 37 41.062  +07 43 30.35        09DN143   568  C~0aRQ      
2009 02  18.660833 12 37 41.041  +07 43 30.60        09DN143   568  C~0aRQ      
2009 02  19.513809 12 37 37.646  +07 44 04.13        09DN143   568  C~0aRQ      
2009 02  22.512819 12 37 25.223  +07 46 03.04  23.6i 09DN143   568  C~0aRQ      
2009 02  22.558177 12 37 25.025  +07 46 04.92  24.3g 09DN143   568  C~0aRQ      
2009 02  22.614326 12 37 24.780  +07 46 07.16  24.3g 09DN143   568  C~0aRQ      
2009 02  23.506411 12 37 20.956  +07 46 42.81  24.2g 09DN143   568  C~0aRQ      
2009 02  23.561890 12 37 20.714  +07 46 45.01  24.1g 09DN143   568  C~0aRQ      
2009 02  23.617499 12 37 20.467  +07 46 47.25  24.2g 09DN143   568  C~0aRQ      
2009 02  28.428961 12 36 58.809  +07 50 00.97        09DN143   568  C~0aRQ      
2009 03  25.428002 12 34 47.794  +08 06 25.59        09DN143   568  C~0aRQ      
2009 03  25.454983 12 34 47.642  +08 06 26.55        09DN143   568  C~0aRQ      
2009 05  01.306211 12 31 32.487  +08 23 25.77        09DN143   568  C~0aRQ      
2013 05  14.18981  13 02 02.24   +04 59 10.1   23.2R 09DN143   G37  C~1T0w      
2013 05  14.26197  13 02 01.93   +04 59 11.0         09DN143   G37  C~1T0w      
2015 02  18.34987  13 25 00.55   +02 25 21.6   23.3R 09DN143   695  C~1T0w      
2015 02  18.44328  13 25 00.27   +02 25 24.7         09DN143   695  C~1T0w      
2015 02  18.53368  13 25 00.01   +02 25 28.0         09DN143   695  C~1T0w      

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    -0.01       0.00    -0.03
  2   0.0000     -0.80    -0.03       0.12    -0.03
  3   0.0001     -2.51     0.15       0.47    -0.00
  4   0.0001     -3.46    -0.01       0.53    -0.07
  5   0.0002     -3.84     0.07       0.64    -0.04
  6   0.0025    -63.50    -0.01      11.21    -0.07
  7   0.0107   -280.27    -0.02      46.47    -0.03
  8   0.0108   -283.72    -0.05      47.02     0.04
  9   0.0110   -287.95    -0.05      47.62     0.04
 10   0.0134   -354.29    -0.07      57.61     0.03
 11   0.0136   -358.47     0.00      58.19     0.04
 12   0.0137   -362.73    -0.01      58.78     0.06
 13   0.0269   -735.17     0.04     107.89     0.03
 14   0.0953  -2912.77    -0.03     235.30     0.02
 15   0.0954  -2915.22     0.01     235.28     0.00
 16   0.1963  -5980.28     0.01      20.56    -0.09
 17   4.2316  24012.05    -0.03    -186.56     0.12
 18   4.2318  24007.40     0.03    -187.64     0.19
 19   5.9979  47308.13     0.13     -54.76    -0.11
 20   5.9982  47302.75    -0.02     -53.66    -0.19
 21   5.9984  47297.58    -0.11     -52.25     0.09

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.

09DN143    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.185    39.201    39.169
ecceobj         0.194     0.194     0.194
incobj         10.559    10.559    10.559
qmin           30.733    30.698    30.742
qmax           48.864    49.013    49.003
amean          39.456    39.456    39.456
amin           38.949    38.964    38.973
amax           40.029    40.026    40.029
emean           0.203     0.203     0.203
emin            0.184     0.181     0.183
emax            0.223     0.225     0.224
imean           8.856     8.850     8.855
imin            8.244     8.242     8.232
imax            9.669     9.659     9.624
excite_mean     0.255     0.255     0.255
fracstop        1.000     1.000     1.000
cjmean          2.978     2.978     2.978

libcent 0       180.2     180.4     179.8
libamp  0       107.2     105.4     108.6
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       179.8     177.7     182.7
kozaiamp        180.0     180.0     180.0