Orbit Fit and Astrometric record for 09DL143

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: 09DL143   
# Created Tue Oct 24 01:37:46 2017
# Orbit generated from Bernstein formalism
# Fitting   28 observations of   28
# Arc:   6.00y
# First observation: 2009/02/18
#  Last observation: 2015/02/18
Preliminary a, adot, b, bdot, g, gdot:
   0.000039   0.021630   0.000001   0.001300   0.023152   0.000000
# Chi-squared of fit:     8.66 DOF:   50 RMS:  0.10
# Min/Max residuals:    -0.23    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.489805E-05  2.166049E-02  1.311374E-06  1.298706E-03  2.310521E-02  1.258519E-03
# Covariance matrix:
  1.5029E-13  1.0547E-14 -7.2474E-16  2.0706E-15  1.3587E-13  2.8659E-13
  1.0547E-14  1.5042E-13 -1.6765E-15  9.1550E-15  9.3600E-14  1.3127E-12
 -7.2474E-16 -1.6765E-15  7.5401E-14 -1.5925E-14 -1.8142E-15 -1.5999E-14
  2.0706E-15  9.1550E-15 -1.5925E-14  1.1513E-14  6.7181E-15  8.6327E-14
  1.3587E-13  9.3600E-14 -1.8142E-15  6.7181E-15  2.6252E-13  9.4586E-13
  2.8659E-13  1.3127E-12 -1.5999E-14  8.6327E-14  9.4586E-13  1.2372E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   10.628508 -176.902385    0.545147    0.153030   -0.815419  2454881.095146
# Heliocentric elements and errors
Epoch:              2454880.5000  =  2009/02/18
Mean Anomaly:          105.27994 +/-     0.107
Argument of Peri:      320.95154 +/-     0.101
Long of Asc Node:      111.51709 +/-     0.001
Inclination:            11.02475 +/-     0.000
Eccentricity:         0.04561742 +/-    0.0001
Semi-Major Axis:     43.49162891 +/-    0.0033
Time of Perihelion: 2424243.2312 +/-      31.0
Perihelion:          41.50765321 +/-    0.0072
Aphelion:            45.47560461 +/-    0.0073
Period (y)              286.8248 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -43.33106776 +/-    0.0009
Ecliptic Y           -1.80411116 +/-    0.0000
Ecliptic Z            7.98270332 +/-    0.0002
Ecliptic XDOT         0.00002602 +/-    0.0000
Ecliptic YDOT        -0.00256602 +/-    0.0000
Ecliptic ZDOT         0.00017865 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.09716320 +/-    0.0009
Geocenter to KBO     43.28027711 +/-    0.0010
# Hcoef:  7.94

The following table shows the complete astrometric record for 09DL143. 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 (09DL143) followed by the observatory code and reference code for the source of the astrometry.

2009 02  18.594380 12 28 21.972  +08 30 59.51  23.3i 09DL143   568  C~0aRQ      
2009 02  18.632292 12 28 21.850  +08 31 00.77  23.5i 09DL143   568  C~0aRQ      
2009 02  19.490393 12 28 19.054  +08 31 27.58  23.4i 09DL143   568  C~0aRQ      
2009 02  19.530496 12 28 18.914  +08 31 28.83  23.4i 09DL143   568  C~0aRQ      
2009 02  19.550301 12 28 18.843  +08 31 29.52  23.7i 09DL143   568  C~0aRQ      
2009 02  22.598773 12 28 08.539  +08 33 05.60  24.7g 09DL143   568  C~0aRQ      
2009 02  23.489931 12 28 05.438  +08 33 33.84  24.7g 09DL143   568  C~0aRQ      
2009 02  23.546087 12 28 05.232  +08 33 35.60  24.6g 09DL143   568  C~0aRQ      
2009 02  23.601690 12 28 05.030  +08 33 37.32  24.7g 09DL143   568  C~0aRQ      
2009 03  23.478749 12 26 13.139  +08 48 05.44        09DL143   568  C~0aRQ      
2009 03  23.535406 12 26 12.890  +08 48 07.04        09DL143   568  C~0aRQ      
2009 04  19.345773 12 24 19.891  +08 59 06.95        09DL143   568  C~0aRQ      
2009 04  23.309063 12 24 04.590  +09 00 19.29        09DL143   568  C~0aRQ      
2009 04  27.251842 12 23 50.010  +09 01 22.68        09DL143   568  C~0aRQ      
2009 05  01.271384 12 23 35.864  +09 02 19.39        09DL143   568  C~0aRQ      
2009 05  01.339707 12 23 35.621  +09 02 20.16        09DL143   568  C~0aRQ      
2009 05  01.382777 12 23 35.468  +09 02 20.84        09DL143   568  C~0aRQ      
2009 05  01.422029 12 23 35.341  +09 02 21.25        09DL143   568  C~0aRQ      
2009 05  01.460305 12 23 35.204  +09 02 21.71        09DL143   568  C~0aRQ      
2009 05  17.428702 12 22 47.962  +09 04 35.91        09DL143   568  C~0aRQ      
2013 03  12.28846  12 45 46.50   +06 58 04.9   23.1R 09DL143   695  C~0ue3      
2013 03  12.34210  12 45 46.26   +06 58 06.5         09DL143   695  C~0ue3      
2013 03  13.31021  12 45 42.41   +06 58 36.6         09DL143   695  C~0ue3      
2013 05  14.17770  12 41 37.27   +07 21 19.0   23.7R 09DL143   G37  C~14j8      
2013 05  14.25415  12 41 37.05   +07 21 19.7         09DL143   G37  C~14j8      
2015 02  18.31940  12 56 19.45   +05 53 31.8   23.5R 09DL143   695  C~1M6r      
2015 02  18.41318  12 56 19.20   +05 53 34.4         09DL143   695  C~1M6r      
2015 02  18.50216  12 56 18.95   +05 53 37.3         09DL143   695  C~1M6r      

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    -0.02       0.00    -0.09
  2   0.0001     -2.16     0.01       0.43     0.01
  3   0.0025    -50.92     0.04       8.32    -0.03
  4   0.0026    -53.32    -0.01       8.63    -0.06
  5   0.0026    -54.56    -0.10       8.84    -0.02
  6   0.0110   -233.13     0.06      35.46     0.06
  7   0.0134   -286.59     0.02      42.86     0.04
  8   0.0136   -290.10    -0.03      43.24    -0.00
  9   0.0137   -293.53    -0.04      43.62    -0.06
 10   0.0900  -2161.61     0.18     173.78    -0.04
 11   0.0902  -2165.63     0.19     173.77    -0.08
 12   0.1636  -3964.82     0.21     109.24    -0.00
 13   0.1744  -4201.64    -0.11      85.09     0.26
 14   0.1852  -4425.10     0.06      57.04    -0.03
 15   0.1962  -4639.99    -0.09      25.47     0.09
 16   0.1964  -4643.60    -0.10      24.74    -0.04
 17   0.1965  -4645.95    -0.18      24.46     0.06
 18   0.1967  -4647.84    -0.01      24.09     0.03
 19   0.1968  -4649.89    -0.05      23.70    -0.02
 20   0.2405  -5345.61    -0.02    -132.10     0.01
 21   4.0594  16485.28     0.06    1219.48     0.09
 22   4.0595  16481.34    -0.23    1219.47    -0.12
 23   4.0622  16416.30    -0.06    1223.35    -0.06
 24   4.2316  12510.75     0.03     969.01    -0.18
 25   4.2318  12507.46     0.16     968.30    -0.01
 26   5.9979  26791.45    -0.10    1598.37     0.02
 27   5.9981  26786.90     0.13    1599.19    -0.05
 28   5.9984  26782.23    -0.00    1600.29     0.22

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.

09DL143    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.384    43.394    43.374
ecceobj         0.050     0.050     0.050
incobj         11.014    11.014    11.014
qmin           40.387    40.457    40.418
qmax           47.031    46.979    46.975
amean          43.603    43.613    43.593
amin           43.263    43.280    43.259
amax           43.965    43.971    43.947
emean           0.055     0.055     0.055
emin            0.039     0.039     0.040
emax            0.071     0.070     0.070
imean           9.422     9.422     9.423
imin            8.864     8.866     8.865
imax           10.052    10.055    10.057
excite_mean     0.173     0.173     0.173
fracstop        1.000     1.000     1.000
cjmean          3.061     3.061     3.061

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       174.7     174.8     174.8
kozaiamp        179.9     180.0     180.0