Orbit Fit and Astrometric record for 03QF91

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: 03QF91    
# Created Tue Oct 24 01:37:24 2017
# Orbit generated from Bernstein formalism
# Fitting   13 observations of   13
# Arc:  11.17y
# First observation: 2003/08/23
#  Last observation: 2014/10/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000174   0.024232  -0.000001   0.000215   0.024226   0.000000
# Chi-squared of fit:    18.73 DOF:   20 RMS:  0.21
# Min/Max residuals:    -0.40    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.502966E-05  2.405736E-02 -8.678246E-07  2.156667E-04  2.446186E-02  7.043504E-04
# Covariance matrix:
  3.3072E-13 -3.1397E-13 -2.4316E-17 -3.3499E-15  1.6916E-13 -1.2113E-12
 -3.1397E-13  7.5574E-13 -2.6544E-15  8.0429E-15 -1.9630E-14  2.9500E-12
 -2.4316E-17 -2.6544E-15  1.4661E-13 -1.5544E-14 -2.6121E-15 -9.8781E-15
 -3.3499E-15  8.0429E-15 -1.5544E-14  7.3037E-15 -5.6537E-16  3.1775E-14
  1.6916E-13 -1.9630E-14 -2.6121E-15 -5.6537E-16  4.0010E-13 -1.6428E-13
 -1.2113E-12  2.9500E-12 -9.8781E-15  3.1775E-14 -1.6428E-13  1.1645E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.174061  -16.331177    0.248653   -0.037309   -0.984028  2452874.670673
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:           45.03211 +/-     0.114
Argument of Peri:      235.68980 +/-     0.125
Long of Asc Node:       60.02911 +/-     0.005
Inclination:             2.18164 +/-     0.000
Eccentricity:         0.03069666 +/-    0.0002
Semi-Major Axis:     42.76770317 +/-    0.0059
Time of Perihelion: 2440091.6412 +/-      32.2
Perihelion:          41.45487743 +/-    0.0093
Aphelion:            44.08052892 +/-    0.0095
Period (y)              279.6933 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.07475970 +/-    0.0010
Ecliptic Y          -11.99801285 +/-    0.0003
Ecliptic Z           -1.55084151 +/-    0.0000
Ecliptic XDOT         0.00082833 +/-    0.0000
Ecliptic YDOT         0.00255582 +/-    0.0000
Ecliptic ZDOT         0.00002130 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.86100556 +/-    0.0010
Geocenter to KBO     40.87995768 +/-    0.0011
# Hcoef:  7.30

The following table shows the complete astrometric record for 03QF91. 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 (03QF91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  23.16993  23 03 11.25   -08 25 42.6   22.5R 03QF91    807  Ci4137      
2003 08  23.23867  23 03 10.97   -08 25 44.9         03QF91    807  Ci4137      
2003 08  24.25771  23 03 06.51   -08 26 12.9         03QF91    807  Ci4137      
2003 10  22.13867  22 59 05.26   -08 49 59.2   23.7R 03QF91    695  Cj4699      
2003 10  22.21847  22 59 05.02   -08 50 00.2         03QF91    695  Cj4699      
2003 10  23.11946  22 59 02.41   -08 50 13.8   23.2R 03QF91    304  Ci9429      
2003 10  23.14623  22 59 02.32   -08 50 14.1         03QF91    304  Ci9429      
2004 07  16.34709  23 10 26.07   -07 38 35.1   22.8R 03QF91    807  Cl8405      
2004 07  16.39874  23 10 25.92   -07 38 36.3         03QF91    807  Cl8405      
2004 10  12.14227  23 04 40.48   -08 14 59.2   23.2R 03QF91    695  Cl8405      
2004 10  12.24748  23 04 40.09   -08 15 01.1         03QF91    695  Cl8405      
2014 10  22.15971  23 54 13.11   -02 45 55.7   23.9R 03QF91    G37  C~1BxD      
2014 10  22.26675  23 54 12.75   -02 45 57.8         03QF91    G37  C~1BxD      

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     0.11       0.00     0.21
  2   0.0002     -4.72     0.27      -0.52    -0.30
  3   0.0030    -76.58    -0.06      -0.81     0.01
  4   0.1642  -3928.14    -0.10      58.77     0.10
  5   0.1644  -3931.81    -0.01      59.21     0.31
  6   0.1669  -3972.77    -0.04      61.48     0.16
  7   0.1669  -3974.12    -0.15      61.72     0.31
  8   0.8985   7052.07     0.10     100.50    -0.18
  9   0.8986   7049.55    -0.33     100.26    -0.32
 10   1.1389   1470.07     0.11      81.83    -0.30
 11   1.1392   1464.00     0.10      82.32    -0.07
 12  11.1649  51032.85    -0.40     548.65     0.04
 13  11.1652  51026.72     0.40     548.92     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.

03QF91    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.186    43.204    43.168
ecceobj         0.037     0.038     0.037
incobj          2.180     2.180     2.180
qmin           40.831    40.878    40.837
qmax           45.388    45.374    45.325
amean          43.006    43.024    42.988
amin           42.685    42.703    42.656
amax           43.341    43.363    43.330
emean           0.030     0.030     0.029
emin            0.007     0.011     0.008
emax            0.047     0.047     0.046
imean           1.009     1.005     1.014
imin            0.236     0.222     0.249
imax            1.654     1.654     1.656
excite_mean     0.035     0.035     0.035
fracstop        1.000     1.000     1.000
cjmean          3.088     3.088     3.088

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       183.2     183.3     181.8
kozaiamp        180.0     180.0     180.0