Orbit Fit and Astrometric record for 03QB91

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: 03QB91    
# Created Mon Dec 11 02:37:19 2017
# Orbit generated from Bernstein formalism
# Fitting   16 observations of   17
# Arc:   7.12y
# First observation: 2003/08/24
#  Last observation: 2010/10/08
Preliminary a, adot, b, bdot, g, gdot:
   0.000029   0.019470  -0.000005  -0.001591   0.022859   0.000000
# Chi-squared of fit:    20.33 DOF:   26 RMS:  0.20
# Min/Max residuals:    -0.56    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.365500E-05  1.966215E-02 -1.022133E-06 -1.609388E-03  2.284117E-02  2.978280E-03
# Covariance matrix:
  2.1558E-13 -1.0677E-13 -4.2253E-15  8.3081E-15  1.0041E-13 -8.5353E-13
 -1.0677E-13  1.8808E-13  8.1918E-15 -1.6927E-14  1.4886E-14  1.7254E-12
 -4.2253E-15  8.1918E-15  1.5798E-13 -3.4636E-14 -2.1539E-15  8.5990E-14
  8.3081E-15 -1.6927E-14 -3.4636E-14  1.9310E-14  2.7632E-15 -1.7587E-13
  1.0041E-13  1.4886E-14 -2.1539E-15  2.7632E-15  4.2722E-13 -3.0837E-13
 -8.5353E-13  1.7254E-12  8.5990E-14 -1.7587E-13 -3.0837E-13  1.7955E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.541604    0.582462    0.506045   -0.069631   -0.877473  2452875.907993
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:          128.61890 +/-     0.064
Argument of Peri:       79.58259 +/-     0.053
Long of Asc Node:      136.89855 +/-     0.002
Inclination:             6.50863 +/-     0.000
Eccentricity:         0.19544896 +/-    0.0001
Semi-Major Axis:     39.12361589 +/-    0.0048
Time of Perihelion: 2420936.0680 +/-      14.7
Perihelion:          31.47694596 +/-    0.0052
Aphelion:            46.77028583 +/-    0.0067
Period (y)              244.7184 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.52337065 +/-    0.0012
Ecliptic Y           -0.04918508 +/-    0.0000
Ecliptic Z           -3.46674931 +/-    0.0001
Ecliptic XDOT         0.00031136 +/-    0.0000
Ecliptic YDOT         0.00235442 +/-    0.0000
Ecliptic ZDOT        -0.00022040 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.65816056 +/-    0.0012
Geocenter to KBO     43.78058685 +/-    0.0013
# Hcoef:  6.10

The following table shows the complete astrometric record for 03QB91. 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 (03QB91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  24.40725  00 09 22.45   -03 56 04.6   21.6R 03QB91    807  Ci4137      
2003 08  25.29780  00 09 19.33   -03 56 28.8         03QB91    807  Ci4137      
2003 08  25.39788  00 09 18.96   -03 56 31.5         03QB91    807  Ci4137      
2003 10  01.44005  00 06 48.57   -04 14 10.3   22.8R 03QB91    568  Ci6964      
2003 10  02.46250  00 06 44.24   -04 14 38.2         03QB91    568  Ci6964      
2003 10  23.23101  00 05 21.17   -04 23 08.2         03QB91    304  Ci9429      
2003 10  23.26881  00 05 21.03   -04 23 09.0         03QB91    304  Ci9429      
2004 08  13.33918  00 14 11.24   -03 29 52.2   21.5R 03QB91    807  Co3932      
2004 08  13.40872  00 14 11.03   -03 29 53.8         03QB91    807  Co3932      
2005 08  09.19055  00 18 36.64   -03 06 29.0   21.6R 03QB91    807  Co3932      
2005 08  10.17399  00 18 34.09   -03 06 51.3         03QB91    807  Co3932      
2005 08  10.30863  00 18 33.72   -03 06 54.4         03QB91    807  Co3932      
2008 10  30.274040 00 26 01.78   -02 37 18.3         03QB91    645  C~1S6p      
2008 10  30.274869 00 26 01.78   -02 37 18.3         03QB91    645  C~1S6p      
2008 10  30.277357 00 26 01.77   -02 37 18.4         03QB91    645  C~1S6p      
2010 10  08.32287  00 35 50.58   -01 45 07.9   23.9R 03QB91    688  C~0Nhg      
2010 10  08.38178  00 35 50.24   -01 45 08.8         03QB91    688  C~0Nhg      

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    -0.01       0.00    -0.02
  2   0.0024    -52.47     0.24      -3.58    -0.03
  3   0.0027    -58.62     0.14      -3.85     0.05
  4   0.1041  -2544.39    -0.28     -78.75    -0.56
  5   0.1069  -2614.93    -0.30     -78.57    -0.46
  6   0.1638  -3958.13     0.12     -52.30     0.12
  7   0.1639  -3960.37     0.13     -52.20     0.12
  8   0.9718   4591.78     0.01    -284.67     0.18
  9   0.9719   4588.25     0.01    -284.88     0.29
 10   1.9597   8800.08    -0.08    -590.82     0.14
 11   1.9624   8756.07     0.02    -595.93     0.27
 12   1.9628   8749.74    -0.09    -596.55     0.31
 13   5.1851  15635.10     0.02   -1669.95    -0.16
 14   5.1851  15635.10     0.07   -1669.95    -0.16
 15   5.1851  15634.92     0.04   -1669.99    -0.20
 16   7.1237  25066.78    -0.05   -2372.60     0.12
 17   7.1238  25061.68 (  -1.02)  -2371.35 (   1.29)

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.

03QB91    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.451    39.466    39.436
ecceobj         0.189     0.189     0.188
incobj          6.491     6.491     6.490
qmin           30.692    30.688    30.691
qmax           48.893    48.753    48.903
amean          39.456    39.456    39.456
amin           38.994    39.006    38.970
amax           39.973    39.965    39.996
emean           0.204     0.204     0.204
emin            0.186     0.188     0.185
emax            0.223     0.221     0.224
imean           5.040     5.007     5.098
imin            4.504     4.473     4.549
imax            5.553     5.496     5.648
excite_mean     0.223     0.222     0.223
fracstop        1.000     1.000     1.000
cjmean          2.996     2.996     2.995

libcent 0       180.2     180.4     180.5
libamp  0        90.9      84.9      98.0
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       176.9     183.1     169.1
kozaiamp        180.0     180.0     179.9