Orbit Fit and Astrometric record for 03QN112

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: 03QN112   
# Created Wed Oct 18 01:37:25 2017
# Orbit generated from Bernstein formalism
# Fitting   16 observations of   16
# Arc:  53.95d
# First observation: 2003/08/29
#  Last observation: 2003/10/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000003   0.129058  -0.000002  -0.013650   0.064687   0.000000
# Chi-squared of fit:   273.98 DOF:   26 RMS:  0.73
# Min/Max residuals:    -1.76    1.89
# Exact a, adot, b, bdot, g, gdot:
  2.400601E-05  1.002525E-01 -4.186638E-06 -1.382066E-02  6.010005E-02 -1.657468E-02
# Covariance matrix:
  1.6000E-13  4.3964E-11 -2.2915E-15  3.7550E-13  6.8579E-12 -3.4237E-10
  4.3964E-11  4.4769E-07 -3.1284E-11  5.2271E-09  6.3274E-08 -4.2574E-06
 -2.2915E-15 -3.1284E-11  1.4148E-13 -1.6559E-12 -4.3969E-12  3.0225E-10
  3.7550E-13  5.2271E-09 -1.6559E-12  9.7828E-11  7.3445E-10 -5.0543E-08
  6.8579E-12  6.3274E-08 -4.3969E-12  7.3445E-10  8.9565E-09 -5.9924E-07
 -3.4237E-10 -4.2574E-06  3.0225E-10 -5.0543E-08 -5.9924E-07  4.0968E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.400925  -29.018318   -0.078748   -0.007062   -1.011021  2452880.845963
# Heliocentric elements and errors
Epoch:              2452880.5000  =  2003/08/29
Mean Anomaly:          341.76457 +/-     4.093
Argument of Peri:      220.09845 +/-     9.833
Long of Asc Node:      148.50313 +/-     0.021
Inclination:             7.85790 +/-     0.060
Eccentricity:         0.33343239 +/-    0.0579
Semi-Major Axis:     25.11669929 +/-    1.2795
Time of Perihelion: 2455209.4261 +/-     491.5
Perihelion:          16.74197831 +/-    1.6851
Aphelion:            33.49142027 +/-    2.2412
Period (y)              125.8786 +/-      9.62
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           15.46946889 +/-    0.0229
Ecliptic Y           -8.48880267 +/-    0.0127
Ecliptic Z           -0.11647136 +/-    0.0002
Ecliptic XDOT         0.00154608 +/-    0.0002
Ecliptic YDOT         0.00435632 +/-    0.0002
Ecliptic ZDOT        -0.00062413 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   17.64590049 +/-    0.0210
Geocenter to KBO     16.63892156 +/-    0.0262
# Hcoef: 12.93

The following table shows the complete astrometric record for 03QN112. 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 (03QN112) followed by the observatory code and reference code for the source of the astrometry.

2003 08  29.34522  22 12 41.07   -11 30 01.0   24.8R 03QN112   568  Ci9432      
2003 08  29.36179  22 12 40.87   -11 30 02.2   25.0R 03QN112   568  Ci9432      
2003 08  29.37837  22 12 40.82   -11 30 03.1   25.1R 03QN112   568  Ci9432      
2003 08  29.40554  22 12 40.41   -11 30 05.1   25. R 03QN112   568  Ci9432      
2003 08  29.42797  22 12 40.16   -11 30 06.7         03QN112   568  Ci9432      
2003 08  29.44919  22 12 39.91   -11 30 08.3         03QN112   568  Ci9432      
2003 08  30.40766  22 12 30.98   -11 31 06.7         03QN112   568  Ci9432      
2003 08  30.42890  22 12 30.76   -11 31 07.9   24.5R 03QN112   568  Ci9432      
2003 08  30.45645  22 12 30.28   -11 31 09.8   25.4R 03QN112   568  Ci9432      
2003 08  30.47869  22 12 30.09   -11 31 11.1   24.8R 03QN112   568  Ci9432      
2003 09  20.36928  22 09 21.73   -11 51 21.3         03QN112   568  Ci9432      
2003 09  20.39746  22 09 21.48   -11 51 22.6         03QN112   568  Ci9432      
2003 09  29.21743  22 08 14.15   -11 58 38.9         03QN112   568  Ci9432      
2003 09  29.26292  22 08 13.83   -11 58 41.0         03QN112   568  Ci9432      
2003 10  22.24741  22 06 15.42   -12 12 07.6         03QN112   568  Ci9432      
2003 10  22.29207  22 06 15.29   -12 12 08.6         03QN112   568  Ci9432      

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     0.49       0.00     0.11
  2   0.0000     -3.17    -0.09      -0.08     0.15
  3   0.0001     -4.18     1.50      -0.66    -0.32
  4   0.0002    -10.52    -0.59      -0.39     0.13
  5   0.0002    -14.53    -1.08      -0.58     0.09
  6   0.0003    -18.53    -1.76      -0.77     0.03
  7   0.0029   -161.97     1.89      -8.79    -0.60
  8   0.0030   -165.42     1.76      -8.76    -0.44
  9   0.0030   -172.69    -1.20      -8.04     0.47
 10   0.0031   -175.76    -0.80      -8.26     0.38
 11   0.0603  -3192.00    -0.11    -162.18    -0.19
 12   0.0604  -3195.89    -0.23    -162.10     0.05
 13   0.0845  -4274.75     0.05    -222.95     0.10
 14   0.0846  -4279.89     0.18    -223.26     0.06
 15   0.1476  -6190.41    -0.11    -370.20     0.01
 16   0.1477  -6192.55     0.09    -370.47    -0.04

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.

03QN112    quality flag:1

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        25.325    31.647    23.324
ecceobj         0.339     0.526     0.243
incobj          7.826     7.642     8.016
qmin           15.304    14.908    16.960
qmax           34.017    51.243    29.745
amean          24.031    32.119    23.419
amin           23.120    30.830    22.703
amax           25.457    33.578    23.867
emean           0.337     0.519     0.246
emin            0.328     0.505     0.235
emax            0.347     0.529     0.254
imean           6.400     7.186     6.225
imin            5.975     6.530     5.357
imax            6.946     7.540     7.021
excite_mean     0.355     0.534     0.269
fracstop        0.007     0.009     0.003
cjmean          2.925     2.690     2.986

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       262.9     262.3     201.3
kozaiamp         50.9      23.3      24.8