Orbit Fit and Astrometric record for 09DP143

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: 09DP143   
# Created Tue Oct 24 01:37:46 2017
# Orbit generated from Bernstein formalism
# Fitting   10 observations of   10
# Arc:  99.66d
# First observation: 2009/02/18
#  Last observation: 2009/05/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000014   0.025481  -0.000015   0.004082   0.023036   0.000000
# Chi-squared of fit:     1.78 DOF:   14 RMS:  0.07
# Min/Max residuals:    -0.17    0.12
# Exact a, adot, b, bdot, g, gdot:
  1.367591E-05  1.928734E-02  2.341310E-06  3.913571E-03  2.199906E-02 -1.541063E-03
# Covariance matrix:
  2.8520E-13 -6.7131E-12  8.1258E-15 -3.2276E-14 -2.6286E-13  1.6227E-10
 -6.7131E-12  6.1554E-09 -1.4144E-11  1.3180E-10  9.0234E-10 -4.5287E-08
  8.1258E-15 -1.4144E-11  2.6315E-13 -1.5483E-12 -2.1282E-12  9.3453E-11
 -3.2276E-14  1.3180E-10 -1.5483E-12  2.1316E-11  2.0302E-11 -7.6532E-10
 -2.6286E-13  9.0234E-10 -2.1282E-12  2.0302E-11  1.3853E-10 -5.3412E-09
  1.6227E-10 -4.5287E-08  9.3453E-11 -7.6532E-10 -5.3412E-09  6.3021E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   11.359829 -174.834997    0.574565    0.159466   -0.793699  2454881.106125
# Heliocentric elements and errors
Epoch:              2454880.5000  =  2009/02/18
Mean Anomaly:          243.26715 +/-    14.425
Argument of Peri:      171.59755 +/-    13.464
Long of Asc Node:      141.23018 +/-     0.111
Inclination:            16.07487 +/-     0.032
Eccentricity:         0.10963927 +/-    0.0281
Semi-Major Axis:     43.70866600 +/-    0.4459
Time of Perihelion: 2489105.2560 +/-    4196.7
Perihelion:          38.91647995 +/-    1.2920
Aphelion:            48.50085206 +/-    1.3253
Period (y)              288.9745 +/-      4.42
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -45.24055812 +/-    0.0237
Ecliptic Y           -3.51764814 +/-    0.0021
Ecliptic Z            8.95368740 +/-    0.0048
Ecliptic XDOT         0.00050424 +/-    0.0001
Ecliptic YDOT        -0.00236178 +/-    0.0000
Ecliptic ZDOT         0.00043963 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.25203201 +/-    0.0232
Geocenter to KBO     45.45649393 +/-    0.0243
# Hcoef:  9.00

The following table shows the complete astrometric record for 09DP143. 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 (09DP143) followed by the observatory code and reference code for the source of the astrometry.

2009 02  18.605359 12 37 04.201  +08 22 21.04  24.3i 09DP143   568  C~0aRR      
2009 02  18.642929 12 37 04.082  +08 22 22.16  24.4i 09DP143   568  C~0aRR      
2009 02  19.525025 12 37 01.448  +08 22 50.18  24.6i 09DP143   568  C~0aRR      
2009 02  22.430788 12 36 52.439  +08 24 22.82        09DP143   568  C~0aRR      
2009 02  22.558180 12 36 52.013  +08 24 26.99  25.7g 09DP143   568  C~0aRR      
2009 02  22.614330 12 36 51.847  +08 24 28.67  26.0g 09DP143   568  C~0aRR      
2009 03  25.428002 12 34 55.807  +08 40 42.11        09DP143   568  C~0aRR      
2009 03  25.454983 12 34 55.688  +08 40 42.70        09DP143   568  C~0aRR      
2009 04  27.338330 12 32 45.421  +08 53 41.29        09DP143   568  C~0aRR      
2009 05  29.268302 12 31 18.604  +08 57 55.66        09DP143   568  C~0aRR      

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     0.04       0.00     0.10
  2   0.0001     -2.07    -0.00       0.32     0.01
  3   0.0025    -49.10     0.01      10.34     0.06
  4   0.0105   -208.70     0.01      41.71    -0.05
  5   0.0108   -216.16    -0.17      43.00    -0.04
  6   0.0110   -219.09     0.11      43.56    -0.05
  7   0.0953  -2186.08     0.01     247.78     0.05
  8   0.0954  -2187.93     0.01     247.62    -0.17
  9   0.1854  -4269.84    -0.03     192.19     0.12
 10   0.2729  -5552.18     0.02     -85.70    -0.03

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.

09DP143    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.537    45.361    42.687
ecceobj         0.109     0.203     0.085
incobj         16.066    15.991    16.159
qmin           38.542    35.527    38.624
qmax           49.268    56.167    47.473
amean          43.726    45.650    42.917
amin           43.335    45.247    42.586
amax           44.152    46.118    43.283
emean           0.096     0.204     0.082
emin            0.075     0.188     0.069
emax            0.117     0.220     0.097
imean          15.097    14.651    15.015
imin           14.366    13.948    14.511
imax           15.781    15.405    15.639
excite_mean     0.278     0.325     0.272
fracstop        1.000     1.000     1.000
cjmean          3.005     2.992     3.001

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       183.0     188.0     180.9
kozaiamp        180.0     179.9     180.0