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 Tue Feb 25 02:09:47 2020
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   56 observations of   56
# Arc:  11.90y
# First observation: 2007/06/12
#  Last observation: 2019/05/07
# Chi-squared of fit:    61.57 DOF:  106 RMS:  0.19
# Min/Max residuals:    -0.50    0.56
# Exact a, adot, b, bdot, g, gdot:
  1.685826E-05  2.092288E-02  4.488601E-06  3.679753E-03  2.098676E-02  8.291943E-03
# Covariance matrix:
  8.8323E-14 -3.9269E-14  8.2574E-15 -5.1297E-15  3.7326E-15 -1.4029E-13
 -3.9269E-14  2.9015E-14 -7.1624E-15  4.3856E-15 -3.5343E-15  1.1957E-13
  8.2574E-15 -7.1624E-15  6.2232E-14 -1.1123E-14  2.1724E-14 -2.6828E-14
 -5.1297E-15  4.3856E-15 -1.1123E-14  4.2814E-15 -2.2380E-15  2.0011E-14
  3.7326E-15 -3.5343E-15  2.1724E-14 -2.2380E-15  6.2073E-14  3.3992E-15
 -1.4029E-13  1.1957E-13 -2.6828E-14  2.0011E-14  3.3992E-15  5.6647E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   35.239507 -118.407860   -0.334698    0.550295   -0.778859  2454263.827824
# Heliocentric elements and errors
Epoch:              2454264.5000  =  2007/06/13
Mean Anomaly:           17.00049 +/-     0.004
Argument of Peri:       13.39815 +/-     0.003
Long of Asc Node:      169.26656 +/-     0.000
Inclination:            35.81802 +/-     0.000
Eccentricity:         0.55995772 +/-    0.0001
Semi-Major Axis:     88.79343530 +/-    0.0131
Time of Perihelion: 2439832.4288 +/-       4.5
Perihelion:          39.07286562 +/-    0.0080
Aphelion:           138.51400499 +/-    0.0211
Period (y)              836.7187 +/-      0.18
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -18.67465487 +/-    0.0002
Ecliptic Y          -35.23394071 +/-    0.0004
Ecliptic Z           27.49353361 +/-    0.0003
Ecliptic XDOT         0.00211842 +/-    0.0000
Ecliptic YDOT        -0.00183461 +/-    0.0000
Ecliptic ZDOT         0.00101614 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   48.43592265 +/-    0.0004
Geocenter to KBO     47.64884369 +/-    0.0006
# Hcoef:  5.89

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      
2019 05  06.371590 17 22 11.38   +13 17 08.8   23.2G 07LF38    705  C~39nr      
2019 05  07.317530 17 22 08.55   +13 17 32.9   23.2G 07LF38    705  C~39nr      
2019 05  07.388950 17 22 08.33   +13 17 34.7   23.4G 07LF38    705  C~39nr      

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    -0.30       0.00    -0.30
  2   0.0001      0.00    -0.34       0.00    -0.30
  3   0.0002      0.00    -0.25       0.00    -0.19
  4   0.2488      0.00    -0.11       0.00     0.11
  5   0.2624      0.00     0.22       0.00     0.06
  6   0.2651      0.00    -0.05       0.00    -0.15
  7   0.2651      0.00    -0.06       0.00    -0.05
  8   0.2651      0.00     0.38       0.00    -0.14
  9   0.3200      0.00     0.07       0.00     0.29
 10   0.3201      0.00    -0.00       0.00     0.18
 11   0.3201      0.00    -0.18       0.00     0.23
 12   0.8928      0.00    -0.18       0.00    -0.09
 13   0.8954      0.00    -0.50       0.00    -0.11
 14   0.8955      0.00    -0.07       0.00    -0.08
 15   0.8985      0.00    -0.01       0.00    -0.03
 16   0.8986      0.00     0.14       0.00     0.01
 17   0.8987      0.00     0.01       0.00    -0.06
 18   0.9037      0.00     0.28       0.00     0.06
 19   0.9037      0.00    -0.00       0.00    -0.07
 20   0.9038      0.00     0.03       0.00    -0.01
 21   0.9905      0.00     0.05       0.00     0.08
 22   0.9907      0.00    -0.14       0.00    -0.03
 23   1.1470      0.00    -0.13       0.00     0.24
 24   1.1471      0.00     0.03       0.00    -0.24
 25   1.1472      0.00     0.02       0.00     0.15
 26   2.0232      0.00     0.56       0.00    -0.21
 27   2.0234      0.00    -0.24       0.00     0.42
 28   2.1159      0.00    -0.16       0.00     0.24
 29   2.1160      0.00     0.05       0.00     0.07
 30   2.1188      0.00    -0.01       0.00     0.23
 31   2.1190      0.00     0.02       0.00     0.28
 32   2.1872      0.00     0.15       0.00     0.10
 33   2.1873      0.00    -0.17       0.00     0.02
 34   2.2557      0.00     0.23       0.00     0.11
 35   2.2612      0.00     0.15       0.00     0.02
 36   2.2639      0.00     0.18       0.00     0.14
 37   2.7683      0.00     0.17       0.00    -0.19
 38   2.7683      0.00     0.36       0.00    -0.16
 39   2.7683      0.00     0.39       0.00    -0.42
 40   2.7711      0.00     0.16       0.00    -0.25
 41   2.7712      0.00     0.17       0.00    -0.18
 42   3.8876      0.00    -0.18       0.00    -0.03
 43   3.8879      0.00    -0.20       0.00     0.02
 44   3.8903      0.00     0.13       0.00    -0.13
 45   5.8105      0.00    -0.18       0.00    -0.04
 46   5.8132      0.00    -0.10       0.00    -0.11
 47   5.8841      0.00    -0.16       0.00    -0.06
 48   5.8924      0.00    -0.13       0.00     0.07
 49   5.9962      0.00    -0.18       0.00    -0.05
 50   6.0099      0.00    -0.19       0.00    -0.03
 51   6.0661      0.00     0.09       0.00     0.23
 52   6.0664      0.00    -0.08       0.00     0.27
 53   6.0689      0.00    -0.02       0.00     0.23
 54  11.8988      0.00    -0.03       0.00    -0.03
 55  11.9014      0.00     0.09       0.00    -0.10
 56  11.9016      0.00     0.09       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.

07LF38    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        86.501    86.502    86.500
ecceobj         0.550     0.550     0.550
incobj         35.857    35.857    35.857
qmin           35.895    36.244    36.230
qmax          143.103   142.948   143.124
amean          87.982    88.017    87.992
amin           86.262    86.482    86.374
amax           90.223    90.176    90.261
emean           0.568     0.567     0.565
emin            0.548     0.548     0.545
emax            0.590     0.587     0.588
imean          34.322    34.396    34.522
imin           33.161    33.448    33.376
imax           35.379    35.380    35.548
excite_mean     0.800     0.800     0.800
fracstop        1.000     1.000     1.000
cjmean          2.665     2.666     2.666

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        95.3      88.8      93.2
kozaiamp         81.1      75.1      80.9