Orbit Fit and Astrometric record for 09JC19

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: 09JC19    
# Created Tue Oct 24 01:37:46 2017
# Orbit generated from Bernstein formalism
# Fitting   11 observations of   11
# Arc:  10.89d
# First observation: 2009/05/15
#  Last observation: 2009/05/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000000   0.015367  -0.000001  -0.007179   0.019931   0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit:     1.54 DOF:   17 RMS:  0.07
# Min/Max residuals:    -0.09    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.144955E-05  1.424293E-02 -6.569561E-06 -7.658476E-03  1.966414E-02 -1.335014E-03
# Covariance matrix:
  3.1814E-12  1.4098E-09  2.1689E-13  5.5724E-10  4.0963E-10  2.3231E-09
  1.4098E-09  7.9065E-07  1.3677E-10  3.0492E-07  2.2640E-07  3.9054E-06
  2.1689E-13  1.3677E-10  6.3351E-13  2.6925E-11  3.7881E-11 -1.8316E-09
  5.5724E-10  3.0492E-07  2.6925E-11  1.1923E-07  8.7565E-08  1.6701E-06
  4.0963E-10  2.2640E-07  3.7881E-11  8.7565E-08  6.4844E-08  9.1824E-07
  2.3231E-09  3.9054E-06 -1.8316E-09  1.6701E-06  9.1824E-07 -3.5422E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   15.618060 -175.244079   -0.768754    0.176047   -0.629883  2454966.970345
# Heliocentric elements and errors
Epoch:              2454960.5000  =  2009/05/09
Mean Anomaly:          215.16334 +/-   315.120
Argument of Peri:      302.53795 +/-   302.538
Long of Asc Node:       31.74017 +/-     2.344
Inclination:            32.09519 +/-     2.149
Eccentricity:         0.13393530 +/-    0.1339
Semi-Major Axis:     46.19569241 +/-   46.1957
Time of Perihelion: 2501100.3995 +/- 9999999.9
Perihelion:          40.00845827 +/-   40.4841
Aphelion:            52.38292655 +/-   52.7471
Period (y)              313.9861 +/-    470.98
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -49.39297684 +/-    0.6321
Ecliptic Y           -4.88566046 +/-    0.0525
Ecliptic Z           13.69081335 +/-    0.1773
Ecliptic XDOT         0.00006169 +/-    0.0001
Ecliptic YDOT        -0.00198116 +/-   -0.0020
Ecliptic ZDOT        -0.00107707 +/-   -0.0011
# Distances at JD0 (AU)
Heliocenter to KBO   51.48761219 +/-    0.6082
Geocenter to KBO     50.85400357 +/-    0.6585
# Hcoef:  8.07

The following table shows the complete astrometric record for 09JC19. 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 (09JC19) followed by the observatory code and reference code for the source of the astrometry.

2009 05  15.469579 12 42 34.204  +12 25 47.68        09JC19    568  C~0aRU      
2009 05  20.259695 12 42 21.287  +12 25 32.98  24.3i 09JC19    568  C~0aRU      
2009 05  20.297904 12 42 21.182  +12 25 32.86  24.4i 09JC19    568  C~0aRU      
2009 05  20.331223 12 42 21.103  +12 25 32.72  24.0i 09JC19    568  C~0aRU      
2009 05  20.364003 12 42 21.014  +12 25 32.61  23.9i 09JC19    568  C~0aRU      
2009 05  20.401995 12 42 20.912  +12 25 32.41  24.0i 09JC19    568  C~0aRU      
2009 05  25.324834 12 42 09.006  +12 25 03.90  25.2g 09JC19    568  C~0aRU      
2009 05  25.372759 12 42 08.888  +12 25 03.46  25.3g 09JC19    568  C~0aRU      
2009 05  26.266896 12 42 06.890  +12 24 56.84  25.6g 09JC19    568  C~0aRU      
2009 05  26.314666 12 42 06.781  +12 24 56.36  25.0g 09JC19    568  C~0aRU      
2009 05  26.362558 12 42 06.688  +12 24 56.13  25.3g 09JC19    568  C~0aRU      

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     0.08
  2   0.0131   -166.97     0.02     -90.22    -0.08
  3   0.0132   -168.32    -0.06     -90.96    -0.06
  4   0.0133   -169.33     0.06     -91.56    -0.00
  5   0.0134   -170.47     0.01     -92.18     0.01
  6   0.0135   -171.76    -0.01     -92.97    -0.03
  7   0.0270   -319.61    -0.03    -189.78     0.07
  8   0.0271   -321.01    -0.08    -190.88    -0.05
  9   0.0296   -345.08    -0.05    -208.81     0.01
 10   0.0297   -346.34    -0.01    -209.89    -0.09
 11   0.0298   -347.50     0.15    -210.66     0.13

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.

09JC19    quality flag:1

Type:       SCATEXTD  SCATNEAR  SCATEXTD

axisobj        46.105    55.199    44.525
ecceobj         0.134     0.306     0.200
incobj         32.179    25.881    36.329
qmin           39.501    37.422    33.989
qmax           53.517    74.873    55.746
amean          46.336    55.691    44.652
amin           45.958    55.078    44.257
amax           46.763    56.448    45.103
emean           0.130     0.304     0.213
emin            0.118     0.282     0.188
emax            0.145     0.327     0.237
imean          31.652    25.375    35.591
imin           31.454    24.693    35.063
imax           31.867    26.118    36.156
excite_mean     0.541     0.526     0.620
fracstop        1.000     1.000     1.000
cjmean          2.744     2.881     2.610

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       171.1     182.7     180.2
kozaiamp        180.0     180.0     180.0