Orbit Fit and Astrometric record for 03QX90

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: 03QX90    
# Created Sun Oct 22 01:37:24 2017
# Orbit generated from Bernstein formalism
# Fitting   14 observations of   15
# Arc:  10.12y
# First observation: 2003/08/24
#  Last observation: 2013/10/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000095   0.021363   0.000007  -0.000349   0.022428   0.000000
# Chi-squared of fit:    23.41 DOF:   22 RMS:  0.23
# Min/Max residuals:    -0.35    0.49
# Exact a, adot, b, bdot, g, gdot:
  1.622011E-05  2.130409E-02 -3.523771E-07 -3.456949E-04  2.288966E-02  5.175991E-05
# Covariance matrix:
  2.9681E-13 -5.2283E-13 -7.8354E-15  7.5528E-15  2.0445E-13 -2.4934E-12
 -5.2283E-13  1.8378E-12  3.1153E-14 -2.7401E-14 -8.7633E-13  9.0744E-12
 -7.8354E-15  3.1153E-14  1.5166E-13 -1.7635E-14 -1.9596E-14  1.5591E-13
  7.5528E-15 -2.7401E-14 -1.7635E-14  6.9186E-15  1.3194E-14 -1.3580E-13
  2.0445E-13 -8.7633E-13 -1.9596E-14  1.3194E-14  6.4878E-13 -4.4176E-12
 -2.4934E-12  9.0744E-12  1.5591E-13 -1.3580E-13 -4.4176E-12  4.4991E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.137493  -45.548729   -0.277792   -0.053414   -0.975226  2452875.537223
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:          160.56015 +/-     0.763
Argument of Peri:       91.93504 +/-     0.754
Long of Asc Node:       61.31798 +/-     0.004
Inclination:             3.20088 +/-     0.000
Eccentricity:         0.02718588 +/-    0.0001
Semi-Major Axis:     43.53969793 +/-    0.0106
Time of Perihelion: 2406068.7806 +/-     221.7
Perihelion:          42.35603300 +/-    0.0114
Aphelion:            44.72336287 +/-    0.0119
Period (y)              287.3005 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.42881870 +/-    0.0011
Ecliptic Y          -31.63820936 +/-    0.0011
Ecliptic Z           -2.39115136 +/-    0.0001
Ecliptic XDOT         0.00181651 +/-    0.0000
Ecliptic YDOT         0.00177600 +/-    0.0000
Ecliptic ZDOT        -0.00004145 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.65942836 +/-    0.0011
Geocenter to KBO     43.68785355 +/-    0.0015
# Hcoef:  6.66

The following table shows the complete astrometric record for 03QX90. 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 (03QX90) followed by the observatory code and reference code for the source of the astrometry.

2003 08  24.03648  21 11 32.05   -19 29 45.8   21.8R 03QX90    807  Ci4137      
2003 08  24.14308  21 11 31.58   -19 29 47.7         03QX90    807  Ci4137      
2003 08  25.05255  21 11 27.60   -19 30 03.9         03QX90    807  Ci4137      
2003 10  01.26065  21 09 15.43   -19 38 07.9   23.2R 03QX90    568  Ci6964      
2003 10  01.35035  21 09 15.18   -19 38 08.7         03QX90    568  Ci6964      
2003 10  02.30460  21 09 12.93   -19 38 15.1         03QX90    568  Ci6964      
2003 10  22.12061  21 08 42.83   -19 39 07.4   23.4R 03QX90    695  Cj8802      
2003 10  23.10437  21 08 42.24   -19 39 05.9         03QX90    695  Cj8802      
2004 05  28.24123  21 21 31.37   -18 43 12.3         03QX90    304  Cn6523      
2004 05  28.29809  21 21 31.29   -18 43 12.7         03QX90    304  Cn6523      
2005 06  07.39127  21 26 09.46   -18 23 27.8   23.2R 03QX90    304  Cn6523      
2005 06  07.43225  21 26 09.39   -18 23 28.2         03QX90    304  Cn6523      
2013 10  05.17090  21 57 25.79   -15 54 41.2   22.8R 03QX90    695  C~0zdV      
2013 10  05.27332  21 57 25.46   -15 54 42.7         03QX90    695  C~0zdV      
2013 10  06.20861  21 57 22.82   -15 54 53.0         03QX90    695  C~0zdV      

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    -0.31       0.00     0.02
  2   0.0003     -6.91    -0.19       0.15     0.04
  3   0.0028    -65.46     0.05       1.30     0.20
  4   0.1047  -1993.32 (   0.83)     87.63 (  -0.14)
  5   0.1049  -1996.93     0.42      87.90    -0.20
  6   0.1075  -2029.20     0.49      91.07    -0.23
  7   0.1618  -2451.22    -0.35     165.18     0.01
  8   0.1645  -2458.75    -0.21     169.05    -0.06
  9   0.7617   8946.99     0.25      94.38    -0.28
 10   0.7618   8945.78    -0.07      94.36    -0.08
 11   1.7888  13085.53    -0.05     -14.99     0.29
 12   1.7889  13084.45    -0.03     -15.05     0.37
 13  10.1167  41958.56     0.15    -616.35    -0.03
 14  10.1170  41953.37    -0.34    -616.07    -0.18
 15  10.1196  41912.48     0.18    -612.16     0.13

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.

03QX90    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.830    43.862    43.798
ecceobj         0.020     0.019     0.020
incobj          3.204     3.204     3.204
qmin           41.771    41.881    41.736
qmax           45.994    45.998    46.034
amean          43.812    43.844    43.780
amin           43.480    43.506    43.440
amax           44.156    44.183    44.125
emean           0.027     0.026     0.027
emin            0.009     0.008     0.010
emax            0.042     0.041     0.044
imean           1.891     1.896     1.885
imin            1.115     1.130     1.101
imax            2.493     2.490     2.498
excite_mean     0.043     0.043     0.043
fracstop        1.000     1.000     1.000
cjmean          3.097     3.097     3.097

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       169.0     169.5     169.0
kozaiamp        179.9     179.9     180.0