Orbit Fit and Astrometric record for 03LD9

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: 03LD9     
# Created Sat Feb 22 04:27:20 2020
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   15 observations of   15
# Arc:  16.01y
# First observation: 2003/06/01
#  Last observation: 2019/06/06
# Chi-squared of fit:    58.35 DOF:   24 RMS:  0.35
# Min/Max residuals:    -0.65    0.58
# Exact a, adot, b, bdot, g, gdot:
  1.488247E-05  2.630125E-02  2.601037E-06  3.150252E-03  2.526275E-02  2.639056E-03
# Covariance matrix:
  6.0182E-13 -2.2405E-13  2.9044E-14 -2.3941E-14  7.8115E-13 -4.5060E-13
 -2.2405E-13  1.3299E-13 -1.7670E-14  1.5134E-14 -2.2882E-13  2.8552E-13
  2.9044E-14 -1.7670E-14  1.4435E-13 -1.4634E-14  3.1840E-14 -3.8963E-14
 -2.3941E-14  1.5134E-14 -1.4634E-14  5.3640E-15 -2.3940E-14  3.3502E-14
  7.8115E-13 -2.2882E-13  3.1840E-14 -2.3940E-14  1.8555E-12 -4.4784E-13
 -4.5060E-13  2.8552E-13 -3.8963E-14  3.3502E-14 -4.4784E-13  6.3222E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.410947 -111.306341   -0.030278    0.025060   -1.016342  2452791.625563
# Heliocentric elements and errors
Epoch:              2452792.5000  =  2003/06/02
Mean Anomaly:           30.15261 +/-     0.028
Argument of Peri:      329.16825 +/-     0.036
Long of Asc Node:      237.41608 +/-     0.000
Inclination:             6.97848 +/-     0.000
Eccentricity:         0.17243507 +/-    0.0002
Semi-Major Axis:     47.18381001 +/-    0.0136
Time of Perihelion: 2442877.0981 +/-      10.1
Perihelion:          39.04766633 +/-    0.0139
Aphelion:            55.31995369 +/-    0.0179
Period (y)              324.1139 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -14.72163555 +/-    0.0008
Ecliptic Y          -37.82155869 +/-    0.0020
Ecliptic Z            0.97478384 +/-    0.0001
Ecliptic XDOT         0.00254883 +/-    0.0000
Ecliptic YDOT        -0.00129939 +/-    0.0000
Ecliptic ZDOT         0.00034853 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.59731034 +/-    0.0019
Geocenter to KBO     39.58394265 +/-    0.0021
# Hcoef:  6.55

The following table shows the complete astrometric record for 03LD9. 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 (03LD9) followed by the observatory code and reference code for the source of the astrometry.

2003 06  01.12482  16 28 49.05   -20 21 29.0   21.5R 03LD9     807  Ci2707      
2003 06  01.21781  16 28 48.56   -20 21 27.9         03LD9     807  Ci2707      
2003 07  06.33798  16 26 02.58   -20 14 39.1   23.1R 03LD9     568  Ci2707      
2003 07  06.40998  16 26 02.31   -20 14 38.4         03LD9     568  Ci2707      
2003 07  07.31939  16 25 58.77   -20 14 30.0         03LD9     568  Ci2707      
2004 07  16.11069  16 31 49.18   -20 16 24.9   21.9R 03LD9     807  Cn6523      
2004 07  16.21145  16 31 48.83   -20 16 24.2         03LD9     807  Cn6523      
2005 06  07.18270  16 41 08.14   -20 24 54.6   22.6R 03LD9     304  Cn6523      
2005 06  07.23086  16 41 07.89   -20 24 54.1         03LD9     304  Cn6523      
2006 06  03.26731  16 47 53.47   -20 26 43.9   22.4R 03LD9     250  S~06Ac      
2006 06  03.27171  16 47 53.44   -20 26 43.9         03LD9     250  S~06Ac      
2006 06  03.27611  16 47 53.42   -20 26 43.8         03LD9     250  S~06Ac      
2006 06  03.28050  16 47 53.40   -20 26 43.8         03LD9     250  S~06Ac      
2019 06  06.368050 18 06 56.438  -19 26 40.84  22.5G 03LD9     G37  C~36jC      
2019 06  06.409650 18 06 56.246  -19 26 40.92        03LD9     G37  C~36jC      

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     0.32       0.00    -0.18
  2   0.0003      0.00     0.27       0.00    -0.29
  3   0.0964      0.00    -0.62       0.00     0.04
  4   0.0966      0.00    -0.31       0.00     0.05
  5   0.0991      0.00    -0.14       0.00    -0.03
  6   1.1252      0.00     0.42       0.00    -0.61
  7   1.1255      0.00     0.31       0.00    -0.65
  8   2.0180      0.00     0.00       0.00    -0.39
  9   2.0181      0.00     0.01       0.00    -0.44
 10   3.0066      0.00     0.07       0.00     0.58
 11   3.0066      0.00    -0.04       0.00     0.53
 12   3.0066      0.00     0.00       0.00     0.58
 13   3.0066      0.00     0.04       0.00     0.53
 14  16.0144      0.00    -0.04       0.00    -0.09
 15  16.0145      0.00     0.07       0.00    -0.27

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.

03LD9    quality flag:2

Type:       SCATNEAR CLASSICAL  SCATNEAR

axisobj        46.938    46.938    46.938
ecceobj         0.167     0.167     0.167
incobj          6.992     6.992     6.992
qmin           38.362    38.322    38.366
qmax           56.752    56.649    56.711
amean          47.295    47.295    47.294
amin           46.875    46.874    46.870
amax           47.831    47.804    47.821
emean           0.169     0.169     0.169
emin            0.153     0.153     0.153
emax            0.188     0.186     0.186
imean           8.434     8.434     8.434
imin            7.891     7.890     7.892
imax            8.968     8.974     8.971
excite_mean     0.224     0.224     0.224
fracstop        1.000     1.000     1.000
cjmean          3.080     3.080     3.080

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       181.1     181.2     181.1
kozaiamp        180.0     180.0     180.0