Orbit Fit and Astrometric record for 07LF38

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: 07LF38    
# Created Thu Dec 14 02:37:29 2017
# Orbit generated from Bernstein formalism
# Fitting   52 observations of   53
# Arc:   6.07y
# First observation: 2007/06/12
#  Last observation: 2013/07/07
Preliminary a, adot, b, bdot, g, gdot:
   0.000697   0.019885   0.000185   0.003512   0.020656   0.000000
# Chi-squared of fit:    50.08 DOF:   98 RMS:  0.17
# Min/Max residuals:    -0.45    0.46
# Exact a, adot, b, bdot, g, gdot:
  1.646722E-05  2.092334E-02  4.374593E-06  3.679834E-03  2.098690E-02  8.295886E-03
# Covariance matrix:
  1.2596E-13 -9.2698E-14  9.3769E-15 -1.1582E-14 -1.0303E-14 -5.8590E-13
 -9.2698E-14  1.0520E-13 -1.0960E-14  1.4805E-14  1.6377E-14  7.5673E-13
  9.3769E-15 -1.0960E-14  7.6739E-14 -1.9567E-14  2.1401E-14 -6.9914E-14
 -1.1582E-14  1.4805E-14 -1.9567E-14  1.0092E-14  1.1476E-16  1.1341E-13
 -1.0303E-14  1.6377E-14  2.1401E-14  1.1476E-16  6.7310E-14  1.6939E-13
 -5.8590E-13  7.5673E-13 -6.9914E-14  1.1341E-13  1.6939E-13  5.9041E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   35.239507 -118.407860   -0.334698    0.550295   -0.778859  2454263.827824
# Heliocentric elements and errors
Epoch:              2454260.5000  =  2007/06/09
Mean Anomaly:           16.98560 +/-     0.007
Argument of Peri:       13.38949 +/-     0.006
Long of Asc Node:      169.26678 +/-     0.000
Inclination:            35.81804 +/-     0.000
Eccentricity:         0.56017796 +/-    0.0001
Semi-Major Axis:     88.82674887 +/-    0.0239
Time of Perihelion: 2439832.9573 +/-       0.7
Perihelion:          39.06796156 +/-    0.0167
Aphelion:           138.58553618 +/-    0.0395
Period (y)              837.1897 +/-      0.34
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -18.67454672 +/-    0.0002
Ecliptic Y          -35.23370159 +/-    0.0004
Ecliptic Z           27.49334202 +/-    0.0003
Ecliptic XDOT         0.00211826 +/-    0.0000
Ecliptic YDOT        -0.00183499 +/-    0.0000
Ecliptic ZDOT         0.00101644 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   48.43589866 +/-    0.0004
Geocenter to KBO     47.64877359 +/-    0.0006
# Hcoef:  5.85

The following table shows the complete astrometric record for 07LF38. 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 (07LF38) followed by the observatory code and reference code for the source of the astrometry.

2007 06  12.32707  16 25 31.72   +14 06 01.3   22.4r 07LF38    568  C~1Q3Z      
2007 06  12.36776  16 25 31.55   +14 06 01.3   22.5r 07LF38    568  C~1Q3Z      
2007 06  12.40822  16 25 31.39   +14 06 01.4   22.7r 07LF38    568  C~1Q3Z      
2007 09  11.19157  16 23 05.11   +13 24 41.3   22.2r 07LF38    695  C~1Q3Z      
2007 09  16.16593  16 23 14.91   +13 21 08.9   22.5R 07LF38    675  C~1Q3Z      
2007 09  17.15432  16 23 17.07   +13 20 26.6         07LF38    675  C~1Q3Z      
2007 09  17.15916  16 23 17.08   +13 20 26.5         07LF38    675  C~1Q3Z      
2007 09  17.16401  16 23 17.12   +13 20 26.2         07LF38    675  C~1Q3Z      
2007 10  07.21523  16 24 17.17   +13 06 42.0         07LF38    568  C~1Q3Z      
2007 10  07.23022  16 24 17.22   +13 06 41.3         07LF38    568  C~1Q3Z      
2007 10  07.24437  16 24 17.26   +13 06 40.8         07LF38    568  C~1Q3Z      
2008 05  03.40448  16 33 07.95   +13 54 57.0         07LF38    695  C~1Q3Z      
2008 05  04.38346  16 33 04.38   +13 55 23.4         07LF38    695  C~1Q3Z      
2008 05  04.42348  16 33 04.26   +13 55 24.5         07LF38    695  C~1Q3Z      
2008 05  05.51327  16 33 00.27   +13 55 53.3   22.6r 07LF38    568  C~1Q3Z      
2008 05  05.54253  16 33 00.17   +13 55 54.1   22.7r 07LF38    568  C~1Q3Z      
2008 05  05.57204  16 33 00.05   +13 55 54.8   22.7r 07LF38    568  C~1Q3Z      
2008 05  07.38875  16 32 53.32   +13 56 41.1   22.7r 07LF38    568  C~1Q3Z      
2008 05  07.41794  16 32 53.19   +13 56 41.7   22.7r 07LF38    568  C~1Q3Z      
2008 05  07.44732  16 32 53.08   +13 56 42.5   22.7r 07LF38    568  C~1Q3Z      
2008 06  08.10757  16 30 45.11   +14 04 09.1         07LF38    807  C~1Q3Z      
2008 06  08.18644  16 30 44.77   +14 04 09.2         07LF38    807  C~1Q3Z      
2008 08  04.27250  16 27 52.81   +13 47 54.4         07LF38    568  C~1Q3Z      
2008 08  04.30868  16 27 52.77   +13 47 52.7         07LF38    568  C~1Q3Z      
2008 08  04.34365  16 27 52.72   +13 47 51.9         07LF38    568  C~1Q3Z      
2009 06  20.30531  16 34 51.65   +14 01 46.5         07LF38    695  C~1Q3Z      
2009 06  20.37862  16 34 51.31   +14 01 46.7         07LF38    695  C~1Q3Z      
2009 07  24.17704  16 33 05.23   +13 52 00.1         07LF38    675  C~1Q3Z      
2009 07  24.21386  16 33 05.16   +13 51 58.9         07LF38    675  C~1Q3Z      
2009 07  25.21054  16 33 02.98   +13 51 31.0         07LF38    675  C~1Q3Z      
2009 07  25.30695  16 33 02.77   +13 51 28.3         07LF38    675  C~1Q3Z      
2009 08  19.19596  16 32 31.77   +13 37 19.1   23.0r 07LF38    675  C~1Q3Z      
2009 08  19.22226  16 32 31.74   +13 37 18.0         07LF38    675  C~1Q3Z      
2009 09  13.22068  16 32 49.89   +13 20 10.8         07LF38    568  C~1Q3Z      
2009 09  15.22222  16 32 53.52   +13 18 46.2         07LF38    568  C~1Q3Z      
2009 09  16.22316  16 32 55.46   +13 18 04.1         07LF38    568  C~1Q3Z      
2010 03  19.44923  16 44 25.60   +13 22 24.6         07LF38    675  C~1Q3Z      
2010 03  19.45303  16 44 25.61   +13 22 24.8         07LF38    675  C~1Q3Z      
2010 03  19.45681  16 44 25.61   +13 22 24.7         07LF38    675  C~1Q3Z      
2010 03  20.47202  16 44 25.03   +13 23 07.8         07LF38    675  C~1Q3Z      
2010 03  20.50341  16 44 25.01   +13 23 09.2         07LF38    675  C~1Q3Z      
2011 05  02.26253  16 47 36.24   +13 46 39.5         07LF38    304  C~1Q3Z      
2011 05  02.37400  16 47 35.86   +13 46 42.7         07LF38    304  C~1Q3Z      
2011 05  03.26254  16 47 32.91   +13 47 07.5         07LF38    304  C~1Q3Z      
2013 04  03.62232  16 57 51.87   +13 24 09.0   22.6R 07LF38    568  C~1Q3Z      
2013 04  04.59066  16 57 50.43   +13 24 46.7   22.6R 07LF38    568  C~1Q3Z      
2013 04  30.48049  16 56 48.72   +13 39 40.0   22.6R 07LF38    568  C~1Q3Z      
2013 05  03.51602  16 56 39.01   +13 41 05.6   22.5R 07LF38    568  C~1Q3Z      
2013 06  10.43094  16 54 14.85   +13 50 54.9   22.6R 07LF38    568  C~1Q3Z      
2013 06  15.42537  16 53 54.96   +13 50 59.2         07LF38    568  C~1Q3Z      
2013 07  05.98696  16 52 38.64   +13 48 12.4         07LF38    950  C~1Q3Z      
2013 07  06.06785  16 52 38.35   +13 48 11.2         07LF38    950  C~1Q3Z      
2013 07  07.00706  16 52 35.20   +13 47 56.6         07LF38    950  C~1Q3Z      

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    -0.14       0.00    -0.33
  2   0.0001     -2.43    -0.19      -0.48    -0.33
  3   0.0002     -4.73    -0.12      -0.84    -0.21
  4   0.2488  -1614.88    -0.05   -2847.30     0.12
  5   0.2624  -1433.60     0.27   -3028.19     0.14
  6   0.2651  -1394.51     0.05   -3063.62    -0.13
  7   0.2651  -1394.35     0.02   -3063.69    -0.02
  8   0.2651  -1393.72     0.46   -3063.87    -0.03
  9   0.3200   -373.91     0.07   -3703.12     0.34
 10   0.3201   -373.05     0.02   -3703.66     0.21
 11   0.3201   -372.38    -0.16   -3704.04     0.23
 12   0.8928   6641.58    -0.15     671.01    -0.12
 13   0.8954   6585.27    -0.45     686.31    -0.21
 14   0.8955   6583.33    -0.05     687.04    -0.09
 15   0.8985   6520.55    -0.00     703.46    -0.03
 16   0.8986   6518.96     0.13     703.95     0.04
 17   0.8987   6517.10     0.02     704.28    -0.05
 18   0.9037   6411.67     0.25     729.75     0.11
 19   0.9037   6409.69     0.01     729.96    -0.07
 20   0.9038   6407.96     0.03     730.41     0.01
 21   0.9905   4492.33     0.03     792.20     0.09
 22   0.9907   4487.46    -0.12     791.31    -0.06
 23   1.1470   2227.45    -0.17    -662.51     0.21
 24   1.1471   2227.21     0.08    -664.29    -0.22
 25   1.1472   2226.66    -0.01    -665.22     0.16
 26   2.0232   8037.70 (   0.54)   1380.28 (  -0.11)
 27   2.0234   8032.81    -0.36    1379.46     0.35
 28   2.1159   6638.69    -0.25     489.66     0.19
 29   2.1160   6637.94    -0.02     488.27     0.06
 30   2.1188   6612.48    -0.11     454.49     0.21
 31   2.1190   6610.03    -0.09     451.23     0.27
 32   2.1872   6339.48     0.07    -472.33     0.11
 33   2.1873   6339.27    -0.21    -473.49    -0.03
 34   2.2557   6807.01     0.14   -1426.38     0.14
 35   2.2612   6876.12     0.09   -1498.55     0.02
 36   2.2639   6912.42     0.10   -1534.07     0.15
 37   2.7683  16743.73     0.17     824.27    -0.18
 38   2.7683  16743.83     0.34     824.49    -0.10
 39   2.7683  16743.86     0.43     824.40    -0.35
 40   2.7711  16726.24     0.17     864.81    -0.24
 41   2.7712  16725.66     0.17     866.12    -0.16
 42   3.8876  19162.54    -0.18    2854.15    -0.09
 43   3.8879  19156.39    -0.21    2856.08    -0.05
 44   3.8903  19108.64     0.13    2870.96    -0.12
 45   5.8105  28336.69    -0.03    3551.46    -0.10
 46   5.8132  28307.12     0.06    3583.65    -0.15
 47   5.8841  27208.63    -0.02    4253.58    -0.11
 48   5.8924  27048.68    -0.03    4305.05     0.02
 49   5.9962  24834.73    -0.08    4402.62    -0.11
 50   6.0099  24547.29    -0.09    4340.93    -0.09
 51   6.0661  23486.28     0.10    3925.49     0.22
 52   6.0664  23482.37    -0.07    3923.36     0.22
 53   6.0689  23440.33    -0.01    3898.69     0.20

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.

07LF38    quality flag:2

Type:       SCATNEAR   5:1EEEE  SCATNEAR

axisobj        86.530    86.596    86.463
ecceobj         0.551     0.551     0.550
incobj         35.857    35.857    35.857
qmin           36.706    38.197    35.562
qmax          142.770   141.368   142.946
amean          88.008    88.042    87.922
amin           86.357    86.580    86.257
amax           90.413    90.289    90.183
emean           0.561     0.555     0.570
emin            0.544     0.544     0.549
emax            0.583     0.567     0.594
imean          34.805    35.257    34.175
imin           33.861    34.807    32.782
imax           35.656    35.563    35.357
excite_mean     0.801     0.801     0.800
fracstop        1.000     1.000     1.000
cjmean          2.666     2.665     2.666

libcent 0      -180.0     179.3    -180.0
libamp  0      -180.0     173.3    -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        82.7      71.7     108.9
kozaiamp         73.6      60.4      91.1