Orbit Fit and Astrometric record for 03LA7

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: 03LA7     
# Created Thu Oct 30 01:37:14 2014
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   18
# Arc:   4.78y
# First observation: 2003/06/01
#  Last observation: 2008/03/12
Preliminary a, adot, b, bdot, g, gdot:
   0.000157   0.023387   0.000027  -0.002143   0.023925   0.000000
# Chi-squared of fit:    21.70 DOF:   28 RMS:  0.20
# Min/Max residuals:    -0.70    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.646814E-05  2.278939E-02 -1.804447E-06 -2.064325E-03  2.242986E-02 -9.375335E-03
# Covariance matrix:
  3.4138E-13 -1.3554E-13 -1.9167E-15  1.1052E-15  1.6287E-13 -1.8095E-13
 -1.3554E-13  2.2933E-13  7.0557E-15 -1.7713E-14  1.4617E-13  1.8076E-12
 -1.9167E-15  7.0557E-15  2.5011E-13 -6.5930E-14  6.6987E-15  6.5993E-14
  1.1052E-15 -1.7713E-14 -6.5930E-14  2.7493E-14 -2.8566E-14 -1.9005E-13
  1.6287E-13  1.4617E-13  6.6987E-15 -2.8566E-14  7.8084E-13  2.6990E-12
 -1.8095E-13  1.8076E-12  6.5993E-14 -1.9005E-13  2.6990E-12  1.8946E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.396058 -121.658386   -0.211847   -0.041559   -0.993914  2452791.588443
# Heliocentric elements and errors
Epoch:              2452790.5000  =  2003/05/31
Mean Anomaly:          338.95954 +/-     0.017
Argument of Peri:      271.76715 +/-     0.011
Long of Asc Node:       34.10573 +/-     0.002
Inclination:             5.63760 +/-     0.000
Eccentricity:         0.52535558 +/-    0.0003
Semi-Major Axis:     75.78422509 +/-    0.0395
Time of Perihelion: 2466874.2820 +/-       1.8
Perihelion:          35.97055980 +/-    0.0281
Aphelion:           115.59789038 +/-    0.0638
Period (y)              659.7455 +/-      0.52
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.72281999 +/-    0.0009
Ecliptic Y          -38.87014073 +/-    0.0015
Ecliptic Z           -1.86398112 +/-    0.0001
Ecliptic XDOT         0.00296752 +/-    0.0000
Ecliptic YDOT        -0.00048294 +/-    0.0000
Ecliptic ZDOT        -0.00020373 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.57559055 +/-    0.0014
Geocenter to KBO     44.58342643 +/-    0.0018
# Hcoef:  6.13

The following table shows the complete astrometric record for 03LA7. 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 (03LA7) followed by the observatory code and reference code for the source of the astrometry.

2003 06  01.08770  15 42 05.40   -22 07 33.9   21.6R 03LA7     807  Ci2139      
2003 06  02.14882  15 42 00.65   -22 07 19.1         03LA7     807  Ci2139      
2003 06  02.21447  15 42 00.34   -22 07 18.4         03LA7     807  Ci2139      
2003 07  07.38504  15 39 47.46   -21 59 52.1   23.4R 03LA7     568  Ci2706      
2003 07  08.30729  15 39 44.90   -21 59 42.7         03LA7     568  Ci2706      
2003 07  08.37049  15 39 44.74   -21 59 41.3         03LA7     568  Ci2707      
2005 08  08.02161  15 49 44.21   -22 44 47.1   22.2R 03LA7     807  Cr3579      
2005 08  09.02980  15 49 43.86   -22 44 43.7         03LA7     807  Cr3579      
2005 08  10.02349  15 49 43.61   -22 44 40.5         03LA7     807  Cr3579      
2006 04  26.24200  16 01 35.71   -23 26 42.3   22.1R 03LA7     807  Cr3579      
2006 04  26.32636  16 01 35.31   -23 26 41.4         03LA7     807  Cr3579      
2006 04  27.29302  16 01 31.29   -23 26 33.5         03LA7     807  Cr3579      
2007 04  21.24751  16 07 50.06   -23 50 30.1   21.5R 03LA7     807  Cv1533      
2007 04  21.32203  16 07 49.74   -23 50 29.6         03LA7     807  Cv1533      
2008 03  12.23295  16 15 23.15   -24 13 50.2   23.2R 03LA7     250  S~06Ac      
2008 03  12.23920  16 15 23.14   -24 13 50.2         03LA7     250  S~06Ac      
2008 03  12.29476  16 15 23.11   -24 13 50.4         03LA7     250  S~06Ac      
2008 03  12.30101  16 15 23.11   -24 13 50.4         03LA7     250  S~06Ac      

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    -0.08       0.00     0.07
  2   0.0029    -67.64     0.23      -0.46     0.15
  3   0.0031    -72.00     0.13      -0.75    -0.10
  4   0.0994  -1972.43    -0.10      14.03     0.03
  5   0.1019  -2009.24    -0.30      15.02    -0.11
  6   0.1021  -2011.73 (  -0.23)     15.87 (   0.68)
  7   2.1874   6698.31    -0.01    -784.83    -0.05
  8   2.1901   6692.85     0.10    -782.54    -0.10
  9   2.1928   6688.79     0.21    -780.14    -0.03
 10   2.9025  16856.61     0.38   -1256.05     0.14
 11   2.9028  16851.00    -0.23   -1256.23     0.21
 12   2.9054  16794.82     0.23   -1259.16    -0.07
 13   3.8882  22225.41    -0.34   -1696.35    -0.16
 14   3.8884  22220.95    -0.70   -1696.66    -0.21
 15   4.7807  28679.54     0.17   -1988.96     0.03
 16   4.7807  28679.40     0.08   -1988.99     0.04
 17   4.7809  28679.02     0.10   -1989.26     0.06
 18   4.7809  28679.02     0.15   -1989.26     0.09

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.

03LA7    quality flag:3

Type:         4:1EEE    4:1EEE    4:1EEE

axisobj        75.563    75.562    75.564
ecceobj         0.527     0.527     0.527
incobj          5.658     5.658     5.658
qmin           35.188    35.180    35.177
qmax          119.657   119.856   119.465
amean          75.872    75.872    75.871
amin           74.493    74.511    74.478
amax           77.789    77.897    77.706
emean           0.526     0.526     0.526
emin            0.515     0.515     0.516
emax            0.538     0.539     0.538
imean           5.329     5.328     5.334
imin            5.212     5.212     5.218
imax            5.442     5.442     5.450
excite_mean     0.534     0.534     0.534
fracstop        1.000     1.000     1.000
cjmean          3.085     3.085     3.085

libcent 0       179.4     179.9     179.9
libamp  0       158.2     158.3     158.2
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       173.5     173.6     173.1
kozaiamp        180.0     180.0     180.0