Orbit Fit and Astrometric record for 09JE19

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: 09JE19    
# Created Sat Dec  4 02:10:47 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     19 observations of     19
# Arc:  13.19y
# First observation: 2003/03/31
#  Last observation: 2016/06/08
# Chi-squared of fit:    10.99 DOF:     32 RMS:  0.13
# Min/Max residuals:    -0.27    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.520417E-05  2.987761E-02  5.608848E-06  1.040691E-02  2.940610E-02 -9.429877E-03
# Covariance matrix:
  3.5185E-13 -7.9526E-14  4.2054E-14 -1.9356E-14 -4.0965E-14 -1.0950E-13
 -7.9526E-14  4.2010E-14 -2.4093E-14  1.3836E-14  9.4564E-14  7.4617E-14
  4.2054E-14 -2.4093E-14  2.5079E-13 -3.2795E-14 -4.0720E-14 -4.7166E-14
 -1.9356E-14  1.3836E-14 -3.2795E-14  8.5144E-15  3.5311E-14  2.6799E-14
 -4.0965E-14  9.4564E-14 -4.0720E-14  3.5311E-14  4.6859E-13  1.7772E-13
 -1.0950E-13  7.4617E-14 -4.7166E-14  2.6799E-14  1.7772E-13  1.4484E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   12.023535  174.467881   -0.272391    0.199948   -0.938818  2452729.716854
# Heliocentric elements and errors
Epoch:              2452730.5000  =  2003/04/01
Mean Anomaly:          308.94761 +/-     0.018
Argument of Peri:      116.55899 +/-     0.010
Long of Asc Node:      144.32706 +/-     0.000
Inclination:            22.13416 +/-     0.000
Eccentricity:         0.30048213 +/-    0.0000
Semi-Major Axis:     39.62222392 +/-    0.0017
Time of Perihelion: 2465649.2424 +/-       6.8
Perihelion:          27.71645349 +/-    0.0017
Aphelion:            51.52799434 +/-    0.0025
Period (y)              249.4115 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -34.08923211 +/-    0.0006
Ecliptic Y            3.03172194 +/-    0.0001
Ecliptic Z            7.08422792 +/-    0.0001
Ecliptic XDOT         0.00078107 +/-    0.0000
Ecliptic YDOT        -0.00287580 +/-    0.0000
Ecliptic ZDOT         0.00076498 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.94946466 +/-    0.0006
Geocenter to KBO     34.00675719 +/-    0.0006
# Hcoef:  6.61

The following table shows the complete astrometric record for 09JE19. 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 (09JE19) followed by the observatory code and reference code for the source of the astrometry.

2003 03  31.216111 11 59 08.50   +13 12 59.1   22.2r 09JE19    645  C~4qBt      
2003 03  31.216940 11 59 08.49   +13 12 59.2   21.4i 09JE19    645  C~4qBt      
2003 03  31.218598 11 59 08.47   +13 12 59.4   21.1z 09JE19    645  C~4qBt      
2003 03  31.219428 11 59 08.46   +13 12 59.5   23.1g 09JE19    645  C~4qBt      
2009 04  23.349341 12 44 00.27   +12 12 50.6   23.6u 09JE19    568  C~4qBt      
2009 04  23.393327 12 44 00.04   +12 12 51.7   23.5u 09JE19    568  C~4qBt      
2009 05  15.469581 12 42 21.517  +12 18 39.25  21.7i 09JE19    568  C~0aRU      
2009 05  20.331222 12 42 04.590  +12 18 59.90  21.9i 09JE19    568  C~0aRU      
2009 05  20.364003 12 42 04.480  +12 19 00.00  21.9i 09JE19    568  C~0aRU      
2009 05  20.401995 12 42 04.350  +12 19 00.10  21.8i 09JE19    568  C~0aRU      
2009 05  26.258739 12 41 46.739  +12 18 57.25  23.0g 09JE19    568  C~0aRU      
2009 05  26.306652 12 41 46.599  +12 18 57.03  23.1g 09JE19    568  C~0aRU      
2009 05  26.354612 12 41 46.466  +12 18 56.86  23.1g 09JE19    568  C~0aRU      
2009 07  20.249242 12 41 55.91   +11 56 40.2   21.6r 09JE19    568  C~4qBt      
2009 07  20.263887 12 41 55.96   +11 56 39.5   21.6r 09JE19    568  C~4qBt      
2016 03  02.328704 13 49 23.51   +09 17 40.2   21.3z 09JE19    W84  C~4qBt      
2016 03  02.331192 13 49 23.49   +09 17 40.4   21.3z 09JE19    W84  C~4qBt      
2016 06  08.049595 13 41 13.97   +10 06 30.2         09JE19    W84  C~4qBt      
2016 06  08.052280 13 41 13.96   +10 06 30.4   21.1z 09JE19    W84  C~4qBt      

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     0.17       0.00    -0.07
     2   0.0000      0.00     0.08       0.00    -0.00
     3   0.0000      0.00    -0.08       0.00     0.14
     4   0.0000      0.00    -0.17       0.00     0.21
     5   6.0647      0.00    -0.20       0.00    -0.27
     6   6.0648      0.00    -0.21       0.00    -0.27
     7   6.1253      0.00     0.11       0.00     0.04
     8   6.1386      0.00     0.22       0.00    -0.01
     9   6.1387      0.00     0.23       0.00     0.03
    10   6.1388      0.00     0.20       0.00     0.05
    11   6.1548      0.00    -0.10       0.00     0.05
    12   6.1549      0.00    -0.16       0.00    -0.02
    13   6.1551      0.00    -0.12       0.00    -0.04
    14   6.3054      0.00    -0.03       0.00     0.02
    15   6.3054      0.00     0.05       0.00    -0.07
    16  12.9230      0.00     0.15       0.00     0.08
    17  12.9230      0.00    -0.02       0.00     0.15
    18  13.1905      0.00    -0.05       0.00    -0.12
    19  13.1905      0.00    -0.07       0.00     0.11

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.

09JE19    quality flag:3

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

axisobj        39.256    39.255    39.256
ecceobj         0.299     0.299     0.299
incobj         22.201    22.201    22.201
qmin           26.840    26.851    26.790
qmax           52.773    52.737    52.811
amean          39.454    39.454    39.454
amin           38.998    38.993    39.004
amax           39.995    39.978    40.001
emean           0.259     0.259     0.260
emin            0.181     0.182     0.185
emax            0.319     0.320     0.322
imean          22.765    22.766    22.744
imin           20.625    20.614    20.502
imax           25.255    25.254    25.255
excite_mean     0.468     0.468     0.468
fracstop        1.000     1.000     1.000
cjmean          2.799     2.799     2.799

libcent 0       179.7     180.2     180.1
libamp  0        93.8      93.4      91.4
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        94.7      94.5      94.9
kozaiamp         57.8      57.5      57.9