Orbit Fit and Astrometric record for 09JV18

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: 09JV18    
# Created Tue Oct 24 01:37:46 2017
# Orbit generated from Bernstein formalism
# Fitting   11 observations of   11
# Arc:  10.91d
# First observation: 2009/05/14
#  Last observation: 2009/05/25
Preliminary a, adot, b, bdot, g, gdot:
  -0.000000   0.017805   0.000000   0.001378   0.020518   0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit:     1.53 DOF:   17 RMS:  0.07
# Min/Max residuals:    -0.13    0.11
# Exact a, adot, b, bdot, g, gdot:
  1.322513E-05  1.697280E-02  1.063633E-06  1.037649E-03  2.029979E-02 -4.431601E-05
# Covariance matrix:
  2.0167E-12  1.4702E-09  3.8421E-13  5.7839E-10  4.7142E-10  1.7935E-09
  1.4702E-09  1.2977E-06  3.3727E-10  5.0528E-07  4.1240E-07  2.6158E-06
  3.8421E-13  3.3727E-10  4.0989E-13  1.1780E-10  1.0705E-10  1.8786E-10
  5.7839E-10  5.0528E-07  1.1780E-10  1.9787E-07  1.6071E-07  1.0692E-06
  4.7142E-10  4.1240E-07  1.0705E-10  1.6071E-07  1.3109E-07  6.9001E-07
  1.7935E-09  2.6158E-06  1.8786E-10  1.0692E-06  6.9001E-07 -3.3451E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   13.353678  178.468816   -0.824775    0.134278   -0.565774  2454965.851269
# Heliocentric elements and errors
Epoch:              2454960.5000  =  2009/05/09
Mean Anomaly:          173.63047 +/-   209.385
Argument of Peri:      261.23259 +/-   261.233
Long of Asc Node:      103.64671 +/-     5.261
Inclination:            13.59892 +/-     0.300
Eccentricity:         0.11796596 +/-    0.1180
Semi-Major Axis:     44.59657064 +/-    2.0823
Time of Perihelion: 2511275.3631 +/- 2782776.9
Perihelion:          39.33569344 +/-    5.5723
Aphelion:            49.85744784 +/-    5.7529
Period (y)              297.8245 +/-     20.86
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -48.51308654 +/-    0.8546
Ecliptic Y            0.46708034 +/-    0.0229
Ecliptic Z           11.37761323 +/-    0.2029
Ecliptic XDOT        -0.00001808 +/-   -0.0000
Ecliptic YDOT        -0.00228533 +/-    0.0001
Ecliptic ZDOT         0.00013468 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   49.83159452 +/-    0.8332
Geocenter to KBO     49.26158514 +/-    0.8786
# Hcoef:  8.76

The following table shows the complete astrometric record for 09JV18. 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 (09JV18) followed by the observatory code and reference code for the source of the astrometry.

2009 05  14.350503 12 16 00.085  +12 50 27.24  24.3i 09JV18    568  C~0aRU      
2009 05  15.253695 12 15 57.991  +12 50 28.32  25.9g 09JV18    568  C~0aRU      
2009 05  15.326414 12 15 57.819  +12 50 28.42  24.7i 09JV18    568  C~0aRU      
2009 05  15.388414 12 15 57.684  +12 50 28.47  24.5i 09JV18    568  C~0aRU      
2009 05  15.427086 12 15 57.577  +12 50 28.39        09JV18    568  C~0aRU      
2009 05  22.258545 12 15 43.386  +12 50 20.93  26.3g 09JV18    568  C~0aRU      
2009 05  22.315486 12 15 43.272  +12 50 20.60        09JV18    568  C~0aRU      
2009 05  22.371056 12 15 43.163  +12 50 20.37  25.9g 09JV18    568  C~0aRU      
2009 05  24.280205 12 15 39.740  +12 50 13.64  25.6g 09JV18    568  C~0aRU      
2009 05  24.337723 12 15 39.637  +12 50 13.47  26.0g 09JV18    568  C~0aRU      
2009 05  25.263983 12 15 38.076  +12 50 09.25        09JV18    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    -0.05
  2   0.0025    -28.40    -0.02     -11.50     0.00
  3   0.0027    -30.74    -0.03     -12.44     0.04
  4   0.0028    -32.56     0.11     -13.20     0.11
  5   0.0029    -33.96    -0.06     -13.91    -0.08
  6   0.0217   -220.43     0.01    -105.33     0.10
  7   0.0218   -221.82     0.03    -106.31    -0.06
  8   0.0220   -223.18     0.02    -107.17    -0.13
  9   0.0272   -266.15    -0.05    -133.72     0.00
 10   0.0273   -267.46    -0.07    -134.49     0.07
 11   0.0299   -286.59     0.07    -147.65    -0.00

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.

09JV18    quality flag:1

Type:      CLASSICAL  SCATNEAR     5:3EE

axisobj        44.521    60.711    42.126
ecceobj         0.121     0.346     0.325
incobj         13.586    14.716    13.210
qmin           38.868    39.007    28.170
qmax           50.929    84.403    57.264
amean          44.737    61.229    42.325
amin           44.376    60.540    41.774
amax           45.131    62.077    42.947
emean           0.115     0.348     0.322
emin            0.101     0.337     0.308
emax            0.129     0.361     0.334
imean          11.939    13.263    11.458
imin           11.452    12.869    10.999
imax           12.455    13.679    12.089
excite_mean     0.237     0.417     0.378
fracstop        1.000     1.000     1.000
cjmean          3.043     3.094     2.912

libcent 0      -180.0    -180.0     179.6
libamp  0      -180.0    -180.0     126.4
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       178.7     195.1     182.9
kozaiamp        180.0     180.0     180.0