Orbit Fit and Astrometric record for 385458

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: 385458    
# Created Thu Dec 14 02:36:45 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   31 observations of   31
# Arc:  10.03y
# First observation: 2003/09/25
#  Last observation: 2013/10/06
# Chi-squared of fit:   117.24 DOF:   56 RMS:  0.34
# Min/Max residuals:    -1.13    0.64
# Exact a, adot, b, bdot, g, gdot:
  1.520669E-05  2.119638E-02  1.105074E-06  1.880235E-03  2.276715E-02 -3.716389E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.440729   -8.268765   -0.173622    0.007654   -0.990759  2452907.904493
# Heliocentric elements and errors
Epoch:              2452908.5000  =  2003/09/26
Mean Anomaly:          286.33977 +/-     0.000
Argument of Peri:       98.15795 +/-     0.000
Long of Asc Node:      347.11904 +/-     0.000
Inclination:             5.09792 +/-     0.000
Eccentricity:         0.17123429 +/-    0.0000
Semi-Major Axis:     45.81109544 +/-    0.0000
Time of Perihelion: 2476081.6480 +/-       0.0
Perihelion:          37.96666499 +/-    0.0000
Aphelion:            53.65552588 +/-    0.0000
Period (y)              310.0732 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.46761793 +/-    0.0000
Ecliptic Y           -6.28324095 +/-    0.0000
Ecliptic Z            0.33792012 +/-    0.0000
Ecliptic XDOT        -0.00008237 +/-    0.0000
Ecliptic YDOT         0.00258108 +/-    0.0000
Ecliptic ZDOT         0.00022283 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.91071554 +/-    0.0000
Geocenter to KBO     43.92309207 +/-    0.0000
# Hcoef:  6.85

The following table shows the complete astrometric record for 385458. 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 (385458) followed by the observatory code and reference code for the source of the astrometry.

2003 09  25.40375  23 28 55.50   -02 52 28.1         385458    568  Cq9897      
2003 09  25.46139  23 28 55.26   -02 52 29.5         385458    568  Cq9897      
2003 09  25.52378  23 28 55.01   -02 52 31.3         385458    568  Cq9897      
2003 09  27.36229  23 28 47.40   -02 53 18.2   23.6g 385458    568  Cq9897      
2003 09  27.41465  23 28 47.19   -02 53 19.4   23.8g 385458    568  Cq9897      
2003 09  27.46965  23 28 46.96   -02 53 20.7   23.2g 385458    568  Cq9897      
2004 09  07.34130  23 34 26.62   -02 10 12.5   22.5R 385458    695  Cq9897      
2004 09  07.42784  23 34 26.25   -02 10 14.8   22.2R 385458    695  Cq9897      
2004 09  11.32843  23 34 09.84   -02 11 55.8         385458    695  Cq9897      
2004 09  11.37361  23 34 09.66   -02 11 57.0         385458    695  Cq9897      
2004 09  11.41886  23 34 09.48   -02 11 58.2         385458    695  Cq9897      
2005 07  08.53283  23 41 46.23   -01 17 31.1   22.8r 385458    568  Cq9897      
2005 07  08.58383  23 41 46.16   -01 17 31.4   23.1r 385458    568  Cq9897      
2005 07  09.55654  23 41 45.11   -01 17 36.4   22.8r 385458    568  Cq9897      
2005 10  03.23850  23 36 59.07   -01 46 15.1   23.0R 385458    675  Cq9897      
2005 10  04.23386  23 36 55.06   -01 46 40.1         385458    675  Cq9897      
2007 05  21.26420  23 49 32.56   -00 14 58.3   23.9R 385458    250  S~06Ae      
2007 05  21.27114  23 49 32.58   -00 14 58.1         385458    250  S~06Ae      
2007 05  21.27809  23 49 32.60   -00 14 58.0         385458    250  S~06Ae      
2007 05  21.33364  23 49 32.76   -00 14 56.8         385458    250  S~06Ae      
2007 09  11.39453  23 47 18.72   -00 25 28.0   23.1r 385458    695  Cv8591      
2007 09  11.44579  23 47 18.50   -00 25 29.5   22.8r 385458    695  Cv8591      
2007 09  17.24847  23 46 53.88   -00 28 01.7         385458    675  Cy6717      
2007 09  17.25468  23 46 53.86   -00 28 01.8         385458    675  Cy6717      
2007 09  17.29518  23 46 53.70   -00 28 03.1         385458    675  Cy6717      
2007 09  17.30001  23 46 53.66   -00 28 03.4   23.5R 385458    675  Cy6717      
2007 11  09.15799  23 43 39.95   -00 48 27.0         385458    695  Cy4000      
2007 11  09.24818  23 43 39.73   -00 48 28.4         385458    695  Cy4000      
2013 10  05.29608  00 12 43.91   +03 03 35.7   23.5R 385458    695  C~0zdW      
2013 10  05.34476  00 12 43.72   +03 03 34.9         385458    695  C~0zdW      
2013 10  06.31350  00 12 39.54   +03 03 08.3         385458    695  C~0zdW      

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    -0.18       0.00    -1.13
  2   0.0002      0.00    -0.01       0.00     0.09
  3   0.0003      0.00     0.18       0.00    -0.11
  4   0.0054      0.00    -0.36       0.00    -0.14
  5   0.0055      0.00    -0.22       0.00    -0.01
  6   0.0057      0.00    -0.22       0.00     0.09
  7   0.9526      0.00     0.34       0.00     0.22
  8   0.9528      0.00     0.30       0.00     0.14
  9   0.9635      0.00     0.08       0.00     0.09
 10   0.9636      0.00     0.29       0.00     0.07
 11   0.9638      0.00     0.50       0.00     0.05
 12   1.7854      0.00     0.20       0.00     0.06
 13   1.7856      0.00     0.02       0.00     0.00
 14   1.7882      0.00     0.28       0.00    -0.03
 15   2.0228      0.00     0.13       0.00    -0.18
 16   2.0255      0.00     0.16       0.00    -0.11
 17   3.6519      0.00    -0.76       0.00     0.18
 18   3.6519      0.00    -0.77       0.00     0.23
 19   3.6519      0.00    -0.77       0.00     0.18
 20   3.6521      0.00    -0.83       0.00     0.20
 21   3.9616      0.00     0.40       0.00     0.10
 22   3.9618      0.00     0.38       0.00    -0.06
 23   3.9777      0.00     0.31       0.00     0.12
 24   3.9777      0.00     0.41       0.00     0.19
 25   3.9778      0.00     0.64       0.00    -0.04
 26   3.9778      0.00     0.35       0.00    -0.21
 27   4.1225      0.00    -0.33       0.00    -0.51
 28   4.1228      0.00    -0.28       0.00    -0.51
 29  10.0285      0.00    -0.08       0.00    -0.18
 30  10.0286      0.00     0.27       0.00     0.34
 31  10.0312      0.00     0.02       0.00    -0.02

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.

385458    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.305    46.305    46.306
ecceobj         0.172     0.172     0.172
incobj          5.071     5.071     5.071
qmin           37.361    37.379    37.362
qmax           55.018    55.108    55.104
amean          46.009    46.009    46.009
amin           45.593    45.606    45.589
amax           46.488    46.500    46.493
emean           0.172     0.172     0.172
emin            0.158     0.157     0.158
emax            0.184     0.185     0.185
imean           5.691     5.690     5.677
imin            4.966     4.963     4.905
imax            6.383     6.383     6.384
excite_mean     0.198     0.198     0.198
fracstop        1.000     1.000     1.000
cjmean          3.077     3.077     3.077

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       180.8     180.7     181.8
kozaiamp        180.0     180.0     180.0