Orbit Fit and Astrometric record for 07LH38

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: 07LH38    
# Created Tue Oct 17 01:37:41 2017
# Orbit generated from Bernstein formalism
# Fitting   41 observations of   41
# Arc:   6.07y
# First observation: 2007/06/12
#  Last observation: 2013/07/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.001794   0.036726   0.000663  -0.010105   0.028039   0.000000
# Chi-squared of fit:    90.92 DOF:   76 RMS:  0.26
# Min/Max residuals:    -0.71    0.70
# Exact a, adot, b, bdot, g, gdot:
  2.016238E-05  3.529270E-02 -4.505458E-06 -9.719788E-03  2.735250E-02 -4.650797E-03
# Covariance matrix:
  2.5034E-13 -1.8185E-13 -4.5454E-14  4.4376E-14 -5.0854E-14 -6.4178E-13
 -1.8185E-13  1.7274E-13  4.7648E-14 -4.5765E-14  5.8343E-14  6.6143E-13
 -4.5454E-14  4.7648E-14  1.1056E-13 -3.5167E-14  3.3613E-14  1.9416E-13
  4.4376E-14 -4.5765E-14 -3.5167E-14  2.0640E-14 -1.8175E-14 -1.8398E-13
 -5.0854E-14  5.8343E-14  3.3613E-14 -1.8175E-14  1.3546E-13  2.5446E-13
 -6.4178E-13  6.6143E-13  1.9416E-13 -1.8398E-13  2.5446E-13  2.6576E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   31.501180 -118.736075   -0.339991    0.497362   -0.811480  2454263.817694
# Heliocentric elements and errors
Epoch:              2454260.5000  =  2007/06/09
Mean Anomaly:          358.36622 +/-     0.001
Argument of Peri:      129.99283 +/-     0.006
Long of Asc Node:      122.97469 +/-     0.000
Inclination:            34.18085 +/-     0.000
Eccentricity:         0.73342301 +/-    0.0001
Semi-Major Axis:    138.07927426 +/-    0.0350
Time of Perihelion: 2456950.0727 +/-       1.0
Perihelion:          36.80875667 +/-    0.0129
Aphelion:           239.34979184 +/-    0.0613
Period (y)             1622.5607 +/-      0.62
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -15.14698525 +/-    0.0002
Ecliptic Y          -28.33596629 +/-    0.0004
Ecliptic Z           19.10294304 +/-    0.0003
Ecliptic XDOT         0.00305011 +/-    0.0000
Ecliptic YDOT        -0.00179869 +/-    0.0000
Ecliptic ZDOT        -0.00107286 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.38021643 +/-    0.0003
Geocenter to KBO     36.55972654 +/-    0.0005
# Hcoef:  7.79

The following table shows the complete astrometric record for 07LH38. 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 (07LH38) followed by the observatory code and reference code for the source of the astrometry.

2007 06  12.31694  16 21 26.83   +10 29 13.1   23.4r 07LH38    568  C~1QdL      
2007 06  12.35740  16 21 26.62   +10 29 12.8   23.3r 07LH38    568  C~1QdL      
2007 06  12.39798  16 21 26.42   +10 29 12.6   23.4r 07LH38    568  C~1QdL      
2008 05  05.52392  16 32 12.04   +09 27 00.0   23.5r 07LH38    568  C~1QdL      
2008 05  05.55313  16 32 11.90   +09 27 00.7   23.3r 07LH38    568  C~1QdL      
2008 05  05.58328  16 32 11.76   +09 27 01.4   23.3r 07LH38    568  C~1QdL      
2008 05  29.54062  16 30 12.80   +09 32 34.7   23.5r 07LH38    568  C~1QdL      
2008 05  29.58748  16 30 12.56   +09 32 34.8   23.7r 07LH38    568  C~1QdL      
2008 05  29.59011  16 30 12.53   +09 32 35.1   23.4r 07LH38    568  C~1QdL      
2008 06  01.51911  16 29 57.42   +09 32 43.5         07LH38    568  C~1QdL      
2008 06  07.14778  16 29 28.46   +09 32 39.8         07LH38    807  C~1QdL      
2008 06  07.29383  16 29 27.73   +09 32 39.7   23.0  07LH38    807  C~1QdL      
2008 06  08.11565  16 29 23.55   +09 32 36.9         07LH38    807  C~1QdL      
2008 06  08.19344  16 29 23.12   +09 32 36.4         07LH38    807  C~1QdL      
2008 08  04.27040  16 25 53.07   +09 06 26.6         07LH38    568  C~1QdL      
2008 08  04.30671  16 25 53.01   +09 06 25.0         07LH38    568  C~1QdL      
2008 08  04.34168  16 25 53.00   +09 06 24.0         07LH38    568  C~1QdL      
2009 06  22.28696  16 35 54.48   +08 32 27.1         07LH38    695  C~1QdL      
2009 06  22.35045  16 35 54.18   +08 32 26.1         07LH38    695  C~1QdL      
2009 07  24.18582  16 33 51.27   +08 17 34.4         07LH38    675  C~1QdL      
2009 07  24.21831  16 33 51.17   +08 17 33.3         07LH38    675  C~1QdL      
2009 07  25.20146  16 33 48.55   +08 16 53.9         07LH38    675  C~1QdL      
2009 07  25.29759  16 33 48.30   +08 16 49.9         07LH38    675  C~1QdL      
2009 09  13.22339  16 33 40.65   +07 34 01.6         07LH38    568  C~1QdL      
2009 09  15.21934  16 33 45.75   +07 32 06.6         07LH38    568  C~1QdL      
2009 09  15.22504  16 33 45.76   +07 32 06.5         07LH38    568  C~1QdL      
2009 09  16.22026  16 33 48.45   +07 31 09.4         07LH38    568  C~1QdL      
2010 03  20.49879  16 49 34.27   +07 03 59.2         07LH38    675  C~1QdL      
2011 05  02.26406  16 55 28.11   +06 28 32.8         07LH38    304  C~1QdL      
2011 05  02.37555  16 55 27.65   +06 28 35.7         07LH38    304  C~1QdL      
2011 05  03.25550  16 55 24.00   +06 28 57.1         07LH38    304  C~1QdL      
2013 04  03.62926  17 12 01.16   +04 13 33.3   24.1R 07LH38    568  C~1QdL      
2013 04  04.58296  17 11 59.80   +04 14 05.5   24.0R 07LH38    568  C~1QdL      
2013 05  03.52252  17 10 38.28   +04 28 00.9   23.4R 07LH38    568  C~1QdL      
2013 05  08.56725  17 10 17.39   +04 29 47.8   23.4R 07LH38    568  C~1QdL      
2013 06  10.44552  17 07 35.45   +04 34 35.4   22.8R 07LH38    568  C~1QdL      
2013 06  15.41863  17 07 09.58   +04 34 09.6   22.4R 07LH38    568  C~1QdL      
2013 07  01.42350  17 05 49.66   +04 30 38.6   22.9R 07LH38    568  C~1QdL      
2013 07  05.99342  17 05 28.52   +04 29 03.3         07LH38    950  C~1QdL      
2013 07  06.07434  17 05 28.15   +04 29 01.4         07LH38    950  C~1QdL      
2013 07  07.01346  17 05 23.94   +04 28 39.7         07LH38    950  C~1QdL      

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     0.05       0.00    -0.23
  2   0.0001     -2.98    -0.03      -0.90    -0.23
  3   0.0002     -5.83     0.02      -1.67    -0.10
  4   0.8986  10091.58     0.02   -1767.73     0.05
  5   0.8987  10089.41    -0.04   -1767.46     0.06
  6   0.8987  10087.23    -0.03   -1767.20     0.07
  7   0.9643   8292.61     0.03   -1795.47    -0.37
  8   0.9645   8289.10     0.12   -1796.09    -0.44
  9   0.9645   8288.61    -0.17   -1795.88    -0.21
 10   0.9725   8067.61     0.26   -1832.55    -0.37
 11   0.9879   7648.07    -0.07   -1922.13    -0.01
 12   0.9883   7637.50     0.26   -1924.39     0.46
 13   0.9906   7577.40     0.18   -1939.53     0.70
 14   0.9908   7571.26    -0.17   -1941.30     0.44
 15   1.1470   4834.49    -0.46   -4099.43    -0.71
 16   1.1471   4833.93    -0.52   -4101.18    -0.59
 17   1.1472   4833.98     0.00   -4102.19     0.19
 18   2.0287  13999.41    -0.21   -4307.74     0.15
 19   2.0288  13995.24    -0.10   -4309.63     0.15
 20   2.1160  12385.54     0.38   -5556.55     0.31
 21   2.1161  12384.30     0.20   -5557.93     0.47
 22   2.1188  12354.15     0.24   -5604.50     0.38
 23   2.1190  12351.32     0.39   -5609.18     0.30
 24   2.2557  12765.48    -0.17   -8155.09     0.42
 25   2.2612  12863.63     0.04   -8252.79     0.00
 26   2.2612  12863.80    -0.07   -8252.86     0.21
 27   2.2639  12914.85    -0.13   -8300.89     0.21
 28   2.7712  27164.63     0.39   -6987.27    -0.21
 29   3.8876  32893.84    -0.05   -7960.16    -0.44
 30   3.8879  32886.32     0.01   -7958.77    -0.27
 31   3.8903  32827.05    -0.44   -7949.32    -0.50
 32   5.8106  49844.97     0.03  -12798.90    -0.14
 33   5.8132  49816.15     0.08  -12770.95     0.03
 34   5.8924  48357.48     0.11  -12200.03    -0.05
 35   5.9062  48010.43    -0.05  -12161.75    -0.05
 36   5.9962  45458.26    -0.13  -12407.48     0.12
 37   6.0099  45068.81     0.07  -12518.40    -0.10
 38   6.0537  43898.33    -0.09  -12991.84    -0.21
 39   6.0662  43598.38    -0.04  -13156.42     0.23
 40   6.0664  43593.18     0.01  -13159.53     0.17
 41   6.0690  43534.11     0.08  -13195.03     0.10

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.

07LH38    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       131.116   131.207   131.025
ecceobj         0.720     0.720     0.719
incobj         34.203    34.203    34.203
qmin           35.733    35.814    35.732
qmax          242.298   242.199   241.628
amean         134.635   134.600   134.658
amin          131.116   131.184   131.025
amax          139.732   140.016   139.492
emean           0.720     0.720     0.719
emin            0.709     0.708     0.708
emax            0.734     0.735     0.733
imean          33.513    33.553    33.584
imin           32.422    32.403    32.421
imax           34.288    34.394    34.327
excite_mean     0.907     0.907     0.908
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       166.1     167.9     166.1
kozaiamp         33.4      39.9      35.1