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 Apr 15 01:10:05 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     26 observations of     26
# Arc:   8.97y
# First observation: 2003/06/01
#  Last observation: 2012/05/21
# Chi-squared of fit:    38.84 DOF:     46 RMS:  0.22
# Min/Max residuals:    -0.87    0.66
# Exact a, adot, b, bdot, g, gdot:
  1.649926E-05  2.278975E-02 -1.689332E-06 -2.064224E-03  2.243074E-02 -9.371811E-03
# Covariance matrix:
  2.9276E-13 -1.2787E-13 -1.3156E-14  9.0854E-15  5.5579E-14 -4.2493E-13
 -1.2787E-13  9.0822E-14  1.1002E-14 -7.5319E-15 -5.2362E-14  3.5183E-13
 -1.3156E-14  1.1002E-14  1.7017E-13 -2.6084E-14 -8.8557E-15  4.4991E-14
  9.0854E-15 -7.5319E-15 -2.6084E-14  6.1503E-15  4.2324E-15 -3.1121E-14
  5.5579E-14 -5.2362E-14 -8.8557E-15  4.2324E-15  2.0537E-13 -1.8550E-13
 -4.2493E-13  3.5183E-13  4.4991E-14 -3.1121E-14 -1.8550E-13  1.4559E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.396058 -121.658386   -0.211847   -0.041559   -0.993914  2452791.588443
# Heliocentric elements and errors
Epoch:              2452792.5000  =  2003/06/02
Mean Anomaly:          338.94458 +/-     0.005
Argument of Peri:      271.76916 +/-     0.010
Long of Asc Node:       34.10445 +/-     0.001
Inclination:             5.63730 +/-     0.000
Eccentricity:         0.52509730 +/-    0.0001
Semi-Major Axis:     75.74622104 +/-    0.0118
Time of Perihelion: 2466875.7007 +/-      52.9
Perihelion:          35.97208494 +/-    0.0071
Aphelion:           115.52035713 +/-    0.0184
Period (y)              659.2493 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.72189658 +/-    0.0005
Ecliptic Y          -38.86864574 +/-    0.0008
Ecliptic Z           -1.86390244 +/-    0.0000
Ecliptic XDOT         0.00296721 +/-    0.0000
Ecliptic YDOT        -0.00048332 +/-    0.0000
Ecliptic ZDOT        -0.00020373 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.57412022 +/-    0.0007
Geocenter to KBO     44.58200058 +/-    0.0009
# Hcoef:  6.22

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      
2010 06  07.40705  16 22 39.65   -24 50 36.8   22.4r 03LA7     F51  C~4YqR      
2010 06  07.41928  16 22 39.58   -24 50 36.8   22.3r 03LA7     F51  C~4YqR      
2011 05  30.43924  16 29 47.90   -25 13 30.6   22.3r 03LA7     F51  C~4YqR      
2011 05  30.45354  16 29 47.84   -25 13 30.4   22.4r 03LA7     F51  C~4YqR      
2012 05  21.43190  16 37 06.20   -25 35 22.0   22.5g 03LA7     F51  C~4YqR      
2012 05  21.43508  16 37 06.18   -25 35 22.0   22.5g 03LA7     F51  C~4YqR      
2012 05  21.44206  16 37 06.15   -25 35 22.0   22.5g 03LA7     F51  C~4YqR      
2012 05  21.44524  16 37 06.13   -25 35 22.0   22.6g 03LA7     F51  C~4YqR      

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      0.00     0.26       0.00     0.07
     3   0.0031      0.00     0.10       0.00    -0.15
     4   0.0994      0.00    -0.02       0.00     0.01
     5   0.1019      0.00    -0.26       0.00    -0.08
     6   0.1021      0.00     0.01       0.00     0.66
     7   2.1874      0.00     0.02       0.00    -0.14
     8   2.1901      0.00     0.13       0.00    -0.21
     9   2.1928      0.00     0.27       0.00    -0.17
    10   2.9025      0.00     0.28       0.00    -0.01
    11   2.9028      0.00    -0.35       0.00     0.17
    12   2.9054      0.00     0.09       0.00    -0.19
    13   3.8882      0.00    -0.49       0.00    -0.21
    14   3.8884      0.00    -0.87       0.00    -0.20
    15   4.7807      0.00     0.14       0.00    -0.16
    16   4.7807      0.00     0.05       0.00    -0.14
    17   4.7809      0.00     0.08       0.00    -0.12
    18   4.7809      0.00     0.13       0.00    -0.10
    19   7.0180      0.00     0.00       0.00     0.22
    20   7.0180      0.00    -0.12       0.00     0.09
    21   7.9955      0.00    -0.15       0.00    -0.04
    22   7.9955      0.00     0.06       0.00     0.03
    23   8.9729      0.00     0.05       0.00     0.06
    24   8.9729      0.00    -0.00       0.00     0.04
    25   8.9729      0.00     0.08       0.00    -0.01
    26   8.9729      0.00     0.03       0.00    -0.03

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        75.523    75.522    75.524
ecceobj         0.526     0.526     0.526
incobj          5.658     5.658     5.658
qmin           35.174    35.125    35.175
qmax          119.621   119.439   119.576
amean          75.871    75.871    75.871
amin           74.471    74.599    74.618
amax           77.755    77.679    77.757
emean           0.526     0.526     0.526
emin            0.516     0.516     0.516
emax            0.538     0.538     0.538
imean           5.335     5.328     5.330
imin            5.218     5.192     5.199
imax            5.454     5.448     5.442
excite_mean     0.534     0.534     0.534
fracstop        1.000     1.000     1.000
cjmean          3.085     3.085     3.085

libcent 0       179.5     180.8     180.1
libamp  0       156.5     154.5     153.9
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       173.1     176.5     176.2
kozaiamp        180.0     180.0     180.0