Orbit Fit and Astrometric record for 07LE38

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: 07LE38    
# Created Tue Oct 17 01:37:41 2017
# Orbit generated from Bernstein formalism
# Fitting   24 observations of   24
# Arc:   7.94y
# First observation: 2007/06/12
#  Last observation: 2015/05/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000340   0.024617  -0.000139   0.010181   0.024655   0.000000
# Chi-squared of fit:    53.40 DOF:   42 RMS:  0.26
# Min/Max residuals:    -0.84    0.48
# Exact a, adot, b, bdot, g, gdot:
  1.494034E-05  2.430880E-02  7.606138E-06  1.002573E-02  2.441389E-02  1.167491E-04
# Covariance matrix:
  3.3584E-13 -2.9779E-13  8.5176E-14 -1.1006E-13 -1.4215E-13 -1.2807E-12
 -2.9779E-13  3.3875E-13 -1.0258E-13  1.2993E-13  1.1507E-13  1.5079E-12
  8.5176E-14 -1.0258E-13  1.3209E-13 -6.4984E-14 -2.1799E-14 -4.7630E-13
 -1.1006E-13  1.2993E-13 -6.4984E-14  6.7173E-14  4.7159E-14  6.0534E-13
 -1.4215E-13  1.1507E-13 -2.1799E-14  4.7159E-14  4.4408E-13  5.7788E-13
 -1.2807E-12  1.5079E-12 -4.7630E-13  6.0534E-13  5.7788E-13  7.0283E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   29.723755 -116.954788   -0.310511    0.476924   -0.835224  2454263.834094
# Heliocentric elements and errors
Epoch:              2454260.5000  =  2007/06/09
Mean Anomaly:            1.23666 +/-     0.018
Argument of Peri:       53.81072 +/-     0.030
Long of Asc Node:      193.46722 +/-     0.000
Inclination:            35.93712 +/-     0.000
Eccentricity:         0.23370076 +/-    0.0001
Semi-Major Axis:     54.54593172 +/-    0.0084
Time of Perihelion: 2453755.0375 +/-       7.4
Perihelion:          41.79850601 +/-    0.0084
Aphelion:            67.29335744 +/-    0.0117
Period (y)              402.8578 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -16.28388245 +/-    0.0004
Ecliptic Y          -32.70955939 +/-    0.0009
Ecliptic Z           20.30919169 +/-    0.0006
Ecliptic XDOT         0.00268358 +/-    0.0000
Ecliptic YDOT        -0.00075150 +/-    0.0000
Ecliptic ZDOT         0.00098278 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.80362867 +/-    0.0008
Geocenter to KBO     40.96029567 +/-    0.0011
# Hcoef:  7.11

The following table shows the complete astrometric record for 07LE38. 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 (07LE38) followed by the observatory code and reference code for the source of the astrometry.

2007 06  12.33334  16 26 11.69   +08 27 09.5   23.2r 07LE38    568  C~1Q3Y      
2007 06  12.37405  16 26 11.51   +08 27 09.7   23.4r 07LE38    568  C~1Q3Y      
2007 06  12.41449  16 26 11.31   +08 27 10.0   23.2r 07LE38    568  C~1Q3Z      
2008 05  05.56122  16 34 59.96   +08 33 51.4   23.2r 07LE38    568  C~1Q3Z      
2008 05  05.59157  16 34 59.83   +08 33 52.4   22.9r 07LE38    568  C~1Q3Z      
2008 05  05.59732  16 34 59.81   +08 33 52.6   23.0r 07LE38    568  C~1Q3Z      
2008 05  07.40731  16 34 52.18   +08 34 48.9   23.0r 07LE38    568  C~1Q3Z      
2008 05  07.43658  16 34 52.08   +08 34 49.7   23.3r 07LE38    568  C~1Q3Z      
2008 05  07.46599  16 34 51.95   +08 34 50.6   23.2r 07LE38    568  C~1Q3Z      
2008 05  29.54061  16 33 11.48   +08 43 22.4   23.2r 07LE38    568  C~1Q3Z      
2008 05  29.58747  16 33 11.26   +08 43 23.2         07LE38    568  C~1Q3Z      
2008 05  29.59011  16 33 11.25   +08 43 22.9         07LE38    568  C~1Q3Z      
2008 06  01.51911  16 32 57.41   +08 44 05.1         07LE38    568  C~1Q3Z      
2008 06  07.13001  16 32 31.02   +08 45 06.9         07LE38    807  C~1Q3Z      
2008 06  08.14000  16 32 26.28   +08 45 15.3         07LE38    807  C~1Q3Z      
2008 06  08.20264  16 32 25.97   +08 45 15.8         07LE38    807  C~1Q3Z      
2008 08  04.27450  16 29 09.60   +08 33 27.1         07LE38    568  C~1Q3Z      
2008 08  04.31068  16 29 09.54   +08 33 26.0         07LE38    568  C~1Q3Z      
2008 08  04.34565  16 29 09.48   +08 33 24.9         07LE38    568  C~1Q3Z      
2009 06  20.27733  16 37 30.84   +09 04 12.3         07LE38    695  C~1Q3Z      
2009 06  20.35594  16 37 30.47   +09 04 12.6         07LE38    695  C~1Q3Z      
2009 06  22.32366  16 37 21.84   +09 04 09.1         07LE38    695  C~1Q3Z      
2015 05  22.38998  17 15 37.27   +10 39 34.1   23.2R 07LE38    695  C~1hU4      
2015 05  22.44187  17 15 37.02   +10 39 35.4         07LE38    695  C~1hU4      

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    -0.23
  2   0.0001     -2.66     0.31      -0.29    -0.23
  3   0.0002     -5.63     0.12      -0.54    -0.18
  4   0.8986   7630.74     0.15    1846.25     0.06
  5   0.8987   7628.66     0.13    1846.87     0.10
  6   0.8987   7628.33     0.19    1847.01     0.13
  7   0.9037   7506.43    -0.17    1881.06     0.15
  8   0.9038   7504.82     0.24    1881.56     0.13
  9   0.9039   7502.76     0.20    1882.08     0.12
 10   0.9643   5941.67    -0.09    2105.69     0.36
 11   0.9644   5938.31    -0.05    2105.87     0.46
 12   0.9644   5938.22     0.05    2105.55     0.13
 13   0.9724   5728.57    -0.29    2108.67     0.39
 14   0.9878   5332.36    -0.38    2096.36    -0.15
 15   0.9906   5261.70    -0.65    2091.51    -0.44
 16   0.9907   5257.09    -0.84    2091.14    -0.49
 17   1.1470   2525.57     0.17     854.84    -0.03
 18   1.1471   2524.90     0.15     853.60    -0.04
 19   1.1472   2524.23     0.09     852.35    -0.09
 20   2.0231   9487.32     0.16    4059.53    -0.14
 21   2.0233   9481.86    -0.14    4058.78     0.18
 22   2.0287   9356.72     0.48    4031.00    -0.15
 23   7.9427  42055.76     0.13   16785.93    -0.04
 24   7.9428  42051.71    -0.12   16786.38    -0.01

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.

07LE38    quality flag:2

Type:       SCATNEAR  SCATEXTD  SCATNEAR

axisobj        53.730    53.754    53.705
ecceobj         0.222     0.223     0.222
incobj         36.036    36.036    36.036
qmin           40.921    40.932    40.921
qmax           67.887    67.904    67.859
amean          54.118    54.143    54.093
amin           53.616    53.642    53.602
amax           54.708    54.723    54.703
emean           0.226     0.226     0.226
emin            0.211     0.212     0.211
emax            0.241     0.241     0.241
imean          35.940    35.940    35.941
imin           35.660    35.658    35.661
imax           36.295    36.264    36.278
excite_mean     0.629     0.629     0.629
fracstop        1.000     1.000     1.000
cjmean          2.671     2.671     2.671

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       195.7     196.2     195.2
kozaiamp        180.0     180.0     180.0