Orbit Fit and Astrometric record for 03QN91

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: 03QN91    
# Created Tue Oct 24 01:37:24 2017
# Orbit generated from Bernstein formalism
# Fitting   15 observations of   15
# Arc:  10.93y
# First observation: 2003/08/23
#  Last observation: 2014/07/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000248   0.029517  -0.000039   0.001651   0.027357   0.000000
# Chi-squared of fit:    47.37 DOF:   24 RMS:  0.31
# Min/Max residuals:    -1.31    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.614913E-05  2.893060E-02  1.685497E-07  1.622846E-03  2.702208E-02  7.202635E-04
# Covariance matrix:
  3.6509E-13 -2.4918E-13  5.3635E-15 -1.1946E-14  1.5180E-13 -6.3278E-13
 -2.4918E-13  5.8428E-13 -2.3257E-14  3.2740E-14  2.8328E-13  1.7129E-12
  5.3635E-15 -2.3257E-14  1.3477E-13 -1.7722E-14 -1.9220E-14 -7.0792E-14
 -1.1946E-14  3.2740E-14 -1.7722E-14  9.4147E-15  1.8542E-14  9.7779E-14
  1.5180E-13  2.8328E-13 -1.9220E-14  1.8542E-14  6.5470E-13  9.5497E-13
 -6.3278E-13  1.7129E-12 -7.0792E-14  9.7779E-14  9.5497E-13  5.1123E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.998045  -23.302902    0.127617   -0.052653   -1.006220  2452874.651443
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:           10.25631 +/-     0.037
Argument of Peri:      304.94575 +/-     0.046
Long of Asc Node:       18.76816 +/-     0.001
Inclination:             4.33592 +/-     0.000
Eccentricity:         0.10430445 +/-    0.0001
Semi-Major Axis:     42.33715816 +/-    0.0052
Time of Perihelion: 2450003.8847 +/-      10.2
Perihelion:          37.92120430 +/-    0.0060
Aphelion:            46.75311202 +/-    0.0069
Period (y)              275.4804 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.81382017 +/-    0.0010
Ecliptic Y          -15.13116888 +/-    0.0004
Ecliptic Z           -1.93552375 +/-    0.0001
Ecliptic XDOT         0.00122913 +/-    0.0000
Ecliptic YDOT         0.00265417 +/-    0.0000
Ecliptic ZDOT         0.00016056 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.00921728 +/-    0.0009
Geocenter to KBO     37.00676858 +/-    0.0011
# Hcoef:  7.31

The following table shows the complete astrometric record for 03QN91. 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 (03QN91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  23.15070  22 38 16.69   -11 50 13.2   21.7R 03QN91    807  Ci4137      
2003 08  25.23376  22 38 06.36   -11 51 12.9         03QN91    807  Ci4137      
2003 08  25.33868  22 38 05.84   -11 51 16.1         03QN91    807  Ci4137      
2003 10  22.11010  22 33 57.90   -12 12 34.6   23.4R 03QN91    695  Cj4699      
2003 10  22.20949  22 33 57.58   -12 12 35.4         03QN91    695  Cj4699      
2004 08  12.29009  22 45 11.30   -11 02 57.9   22.4R 03QN91    807  Cl8405      
2004 08  12.36015  22 45 10.96   -11 02 59.8         03QN91    807  Cl8405      
2004 10  11.17003  22 40 34.51   -11 28 29.9   22.6R 03QN91    695  Cl8405      
2004 10  11.27148  22 40 34.14   -11 28 31.6         03QN91    695  Cl8405      
2004 10  12.13108  22 40 31.10   -11 28 45.5   23.7R 03QN91    695  Cl8405      
2004 10  12.23634  22 40 30.72   -11 28 48.8         03QN91    695  Cl8405      
2004 11  10.15227  22 39 23.51   -11 32 54.4   22.5R 03QN91    695  Cl9847      
2004 11  11.12698  22 39 22.58   -11 32 54.6         03QN91    695  Cl9847      
2014 07  29.40290  23 45 05.38   -03 38 07.4   23.4R 03QN91    G37  C~16aI      
2014 07  29.45088  23 45 05.24   -03 38 08.3         03QN91    G37  C~16aI      

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     0.16       0.00     0.16
  2   0.0057   -162.97     0.04       1.21     0.39
  3   0.0060   -171.25     0.09       1.09     0.16
  4   0.1642  -4023.82     0.08     164.90    -0.07
  5   0.1644  -4028.47    -0.44     165.89     0.40
  6   0.9723   6716.65    -0.08     334.94     0.09
  7   0.9725   6711.29    -0.21     335.08     0.22
  8   1.1363   2365.38     0.26     450.98    -0.22
  9   1.1365   2359.70     0.27     451.44    -0.23
 10   1.1389   2313.05     0.28     455.32     0.14
 11   1.1392   2306.63    -0.34     454.36    -1.31
 12   1.2183   1298.63    -0.02     596.73     0.22
 13   1.2210   1285.88    -0.08     601.65    -0.08
 14  10.9329  68741.33     0.03    3755.14     0.04
 15  10.9331  68738.80    -0.03    3755.17     0.08

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.

03QN91    quality flag:2

Type:      CLASSICAL  SCATNEAR CLASSICAL

axisobj        42.760    42.776    42.744
ecceobj         0.113     0.113     0.113
incobj          4.322     4.322     4.322
qmin           34.817    34.573    35.075
qmax           50.694    50.831    50.555
amean          42.589    42.604    42.573
amin           42.172    42.173    42.161
amax           43.020    43.041    43.006
emean           0.131     0.139     0.122
emin            0.091     0.101     0.073
emax            0.179     0.185     0.176
imean           5.272     5.682     4.876
imin            3.691     4.472     3.173
imax            6.628     7.325     6.066
excite_mean     0.161     0.172     0.149
fracstop        1.000     1.000     1.000
cjmean          3.052     3.048     3.056

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       181.4     179.7     184.0
kozaiamp        180.0     180.0     180.0