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 Sun Dec  5 02:09:36 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     77 observations of     77
# Arc:  15.06y
# First observation: 2003/08/24
#  Last observation: 2018/09/14
# Chi-squared of fit:   113.38 DOF:    148 RMS:  0.21
# Min/Max residuals:    -1.11    0.66
# Exact a, adot, b, bdot, g, gdot:
  1.396265E-05  1.966164E-02 -1.522341E-06 -1.609016E-03  2.284140E-02  2.975680E-03
# Covariance matrix:
  1.4479E-13 -2.5743E-14 -2.7643E-15  1.4567E-15  4.3262E-15 -6.1061E-14
 -2.5743E-14  1.7453E-14  2.4079E-15 -1.3580E-15  3.3607E-14  5.7357E-14
 -2.7643E-15  2.4079E-15  1.0865E-13 -9.1087E-15  4.2595E-15  8.3863E-15
  1.4567E-15 -1.3580E-15 -9.1087E-15  1.0079E-15 -2.6053E-15 -4.7152E-15
  4.3262E-15  3.3607E-14  4.2595E-15 -2.6053E-15  1.4466E-13  1.1096E-13
 -6.1061E-14  5.7357E-14  8.3863E-15 -4.7152E-15  1.1096E-13  1.9908E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.541604    0.582462    0.506045   -0.069631   -0.877472  2452875.907993
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:          128.69774 +/-     0.012
Argument of Peri:       79.54810 +/-     0.007
Long of Asc Node:      136.89256 +/-     0.001
Inclination:             6.50795 +/-     0.000
Eccentricity:         0.19543838 +/-    0.0000
Semi-Major Axis:     39.11966581 +/-    0.0018
Time of Perihelion: 2420927.3333 +/-       3.8
Perihelion:          31.47418171 +/-    0.0019
Aphelion:            46.76514992 +/-    0.0025
Period (y)              244.6814 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.52293606 +/-    0.0007
Ecliptic Y           -0.04917604 +/-    0.0000
Ecliptic Z           -3.46673676 +/-    0.0001
Ecliptic XDOT         0.00031105 +/-    0.0000
Ecliptic YDOT         0.00235433 +/-    0.0000
Ecliptic ZDOT        -0.00022033 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.65764445 +/-    0.0007
Geocenter to KBO     43.78008520 +/-    0.0007
# Hcoef:  6.64

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 09  08.45496  00 37 52.522  -01 31 11.28  22.9G 03QB91    F51  C~2r7B      
2010 09  15.50963  00 37 25.183  -01 34 30.18  23.5G 03QB91    F51  C~2r7B      
2010 09  16.44307  00 37 21.499  -01 34 56.68  23.6G 03QB91    F51  C~2r7B      
2010 10  04.41453  00 36 06.976  -01 43 22.43  22.1G 03QB91    F51  C~2r7B      
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      
2012 10  15.38446  00 43 35.279  -01 05 16.81  23.4G 03QB91    F51  C~2r7B      
2012 10  22.33877  00 43 07.052  -01 08 06.74  21.7G 03QB91    F51  C~2r7B      
2013 10  13.21291  00 47 51.382  -00 42 50.69  22.8i 03QB91    W84  C~4yD1      
2013 10  13.21291  00 47 51.38   -00 42 50.7   22.9i 03QB91    W84  C~3cWO      
2013 10  13.216551 00 47 51.36   -00 42 50.6   22.8z 03QB91    W84  C~351P      
2013 10  13.21708  00 47 51.363  -00 42 50.70  23.0z 03QB91    W84  C~4yD1      
2013 11  08.18987  00 46 11.133  -00 52 27.54  23.1r 03QB91    W84  C~4yD1      
2013 11  08.18987  00 46 11.13   -00 52 27.5   23.2r 03QB91    W84  C~3cWO      
2013 11  08.19126  00 46 11.137  -00 52 27.48  23.0i 03QB91    W84  C~4yD1      
2013 11  08.19126  00 46 11.14   -00 52 27.5   23.2i 03QB91    W84  C~3cWO      
2013 11  23.147801 00 45 26.49   -00 56 00.0   23.0i 03QB91    W84  C~351P      
2013 11  23.14833  00 45 26.503  -00 56 00.37  23.0i 03QB91    W84  C~4yD1      
2013 11  23.14970  00 45 26.521  -00 56 00.68  22.7z 03QB91    W84  C~4yD1      
2014 09  18.46177  00 53 39.349  -00 10 07.81  22.9G 03QB91    F51  C~2r7B      
2014 09  22.43468  00 53 23.515  -00 11 58.80  23.1G 03QB91    F51  C~2r7B      
2014 10  28.20558  00 50 56.350  -00 27 29.15  23.3r 03QB91    W84  C~4yD1      
2014 11  14.08300  00 49 56.464  -00 32 48.48  23.2i 03QB91    W84  C~4yD1      
2014 11  14.13867  00 49 56.279  -00 32 49.22  23.2r 03QB91    W84  C~4yD1      
2014 11  14.13867  00 49 56.28   -00 32 49.2   23.5r 03QB91    W84  C~3cWO      
2014 11  18.09934  00 49 44.226  -00 33 46.86  22.7z 03QB91    W84  C~4yD1      
2015 10  17.15415  00 55 45.297  -00 01 49.47  23.2r 03QB91    W84  C~4yD1      
2015 11  02.10088  00 54 41.771  -00 07 58.57  22.8r 03QB91    W84  C~4yD1      
2016 08  26.32136  01 03 01.638  +00 41 53.64  22.5i 03QB91    W84  C~4yD1      
2016 08  26.32136  01 03 01.64   +00 41 53.7   22.6i 03QB91    W84  C~3cWO      
2016 08  26.32273  01 03 01.642  +00 41 53.77  23.0r 03QB91    W84  C~4yD1      
2016 08  26.32273  01 03 01.64   +00 41 53.7   23.4r 03QB91    W84  C~3cWO      
2016 08  26.32411  01 03 01.632  +00 41 53.74  23.2z 03QB91    W84  C~4yD1      
2016 08  30.35404  01 02 49.759  +00 40 15.98  24.4g 03QB91    W84  C~4yD1      
2016 10  29.21651  00 58 55.860  +00 14 12.58  23.1r 03QB91    W84  C~4yD1      
2016 10  29.21651  00 58 55.86   +00 14 12.5   23.0r 03QB91    W84  C~3cWO      
2016 10  29.21788  00 58 55.854  +00 14 12.57  23.3i 03QB91    W84  C~4yD1      
2016 10  29.21788  00 58 55.85   +00 14 12.6   23.3i 03QB91    W84  C~3cWO      
2016 11  05.17275  00 58 29.541  +00 11 48.34  23.2r 03QB91    W84  C~4yD1      
2016 11  05.17275  00 58 29.54   +00 11 48.3   23.2r 03QB91    W84  C~3cWO      
2016 11  06.15607  00 58 25.969  +00 11 29.41  22.5z 03QB91    W84  C~4yD1      
2016 11  06.19836  00 58 25.819  +00 11 28.46  22.7i 03QB91    W84  C~4yD1      
2016 11  06.19836  00 58 25.82   +00 11 28.5   22.8i 03QB91    W84  C~3cWO      
2016 11  06.19973  00 58 25.813  +00 11 28.54  24.6g 03QB91    W84  C~4yD1      
2017 08  22.33695  01 07 12.924  +01 04 22.16  23.4r 03QB91    W84  C~4yD1      
2017 08  22.33832  01 07 12.899  +01 04 22.19  22.9i 03QB91    W84  C~4yD1      
2017 08  31.58136  01 06 47.095  +01 00 45.17  23.7G 03QB91    F51  C~2r7B      
2017 09  17.47521  01 05 48.703  +00 53 25.09  22.3G 03QB91    F51  C~2r7B      
2017 09  17.49935  01 05 48.596  +00 53 24.00  23.6G 03QB91    F51  C~2r7B      
2017 09  17.51148  01 05 48.563  +00 53 23.50  23.6G 03QB91    F51  C~2r7B      
2017 09  18.28731  01 05 45.600  +00 53 02.60  23.6r 03QB91    W84  C~4yD1      
2017 09  18.28870  01 05 45.605  +00 53 02.58  22.9i 03QB91    W84  C~4yD1      
2017 09  18.29007  01 05 45.602  +00 53 02.36  24.2g 03QB91    W84  C~4yD1      
2017 09  24.41520  01 05 21.586  +00 50 14.60  22.8G 03QB91    F51  C~2r7B      
2017 09  24.42792  01 05 21.523  +00 50 14.04  23.6G 03QB91    F51  C~2r7B      
2017 09  24.44055  01 05 21.476  +00 50 13.52  23.3G 03QB91    F51  C~2r7B      
2017 09  24.45323  01 05 21.415  +00 50 13.10  23.2G 03QB91    F51  C~2r7B      
2017 09  25.50161  01 05 17.231  +00 49 44.78  23.4G 03QB91    F51  C~2r7B      
2017 09  26.47424  01 05 13.292  +00 49 17.76  23.7G 03QB91    F51  C~2r7B      
2018 09  14.34565  01 10 01.713  +01 15 49.38  23.2i 03QB91    W84  C~4yD1      
2018 09  14.34702  01 10 01.704  +01 15 49.30  22.9r 03QB91    W84  C~4yD1      
2018 09  14.34839  01 10 01.704  +01 15 49.10  24.4g 03QB91    W84  C~4yD1      

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    -0.10       0.00     0.05
     2   0.0024      0.00     0.14       0.00     0.14
     3   0.0027      0.00     0.01       0.00     0.17
     4   0.1041      0.00    -0.09       0.00    -0.55
     5   0.1069      0.00    -0.15       0.00    -0.46
     6   0.1638      0.00     0.03       0.00     0.24
     7   0.1639      0.00     0.04       0.00     0.25
     8   0.9718      0.00    -0.06       0.00     0.20
     9   0.9719      0.00    -0.11       0.00     0.30
    10   1.9597      0.00    -0.04       0.00     0.08
    11   1.9624      0.00    -0.00       0.00     0.24
    12   1.9628      0.00    -0.12       0.00     0.24
    13   5.1851      0.00     0.45       0.00    -0.26
    14   5.1851      0.00     0.49       0.00    -0.25
    15   5.1851      0.00     0.48       0.00    -0.30
    16   7.0419      0.00     0.11       0.00     0.22
    17   7.0612      0.00     0.03       0.00    -0.17
    18   7.0638      0.00     0.54       0.00    -0.19
    19   7.1130      0.00    -0.30       0.00    -0.46
    20   7.1237      0.00     0.24       0.00    -0.18
    21   7.1238      0.00    -1.11       0.00     0.49
    22   9.1444      0.00    -0.13       0.00     0.23
    23   9.1634      0.00    -0.74       0.00    -0.29
    24  10.1377      0.00     0.01       0.00    -0.12
    25  10.1377      0.00     0.04       0.00    -0.11
    26  10.1377      0.00    -0.06       0.00     0.08
    27  10.1377      0.00     0.01       0.00    -0.01
    28  10.2089      0.00    -0.02       0.00     0.01
    29  10.2089      0.00     0.03       0.00    -0.03
    30  10.2089      0.00     0.20       0.00     0.03
    31  10.2089      0.00     0.16       0.00     0.05
    32  10.2498      0.00    -0.31       0.00     0.36
    33  10.2498      0.00    -0.09       0.00    -0.00
    34  10.2498      0.00     0.23       0.00    -0.30
    35  11.0693      0.00     0.06       0.00     0.24
    36  11.0802      0.00    -0.31       0.00     0.11
    37  11.1781      0.00     0.08       0.00    -0.17
    38  11.2243      0.00     0.14       0.00    -0.15
    39  11.2245      0.00     0.07       0.00    -0.01
    40  11.2245      0.00     0.06       0.00    -0.03
    41  11.2353      0.00     0.20       0.00    -0.09
    42  12.1472      0.00    -0.09       0.00    -0.11
    43  12.1908      0.00     0.05       0.00    -0.08
    44  13.0073      0.00    -0.01       0.00    -0.11
    45  13.0073      0.00    -0.04       0.00    -0.17
    46  13.0073      0.00     0.05       0.00    -0.08
    47  13.0073      0.00     0.08       0.00    -0.01
    48  13.0073      0.00    -0.01       0.00    -0.00
    49  13.0183      0.00     0.30       0.00    -0.10
    50  13.1822      0.00     0.04       0.00    -0.03
    51  13.1822      0.00     0.04       0.00     0.05
    52  13.1822      0.00    -0.03       0.00     0.10
    53  13.1822      0.00     0.03       0.00     0.07
    54  13.2013      0.00    -0.07       0.00    -0.04
    55  13.2013      0.00    -0.06       0.00    -0.00
    56  13.2040      0.00    -0.05       0.00     0.03
    57  13.2041      0.00     0.04       0.00    -0.07
    58  13.2041      0.00     0.03       0.00    -0.11
    59  13.2041      0.00     0.01       0.00    -0.01
    60  13.9957      0.00     0.07       0.00    -0.05
    61  13.9957      0.00    -0.25       0.00     0.01
    62  14.0210      0.00     0.17       0.00    -0.11
    63  14.0673      0.00    -0.03       0.00     0.66
    64  14.0673      0.00    -0.23       0.00     0.23
    65  14.0674      0.00    -0.02       0.00     0.06
    66  14.0695      0.00    -0.03       0.00     0.11
    67  14.0695      0.00     0.12       0.00     0.13
    68  14.0695      0.00     0.16       0.00    -0.05
    69  14.0863      0.00     0.07       0.00     0.24
    70  14.0863      0.00    -0.10       0.00     0.03
    71  14.0863      0.00    -0.03       0.00    -0.15
    72  14.0864      0.00    -0.17       0.00    -0.22
    73  14.0892      0.00     0.29       0.00     0.30
    74  14.0919      0.00     0.10       0.00     0.03
    75  15.0580      0.00    -0.04       0.00     0.08
    76  15.0580      0.00    -0.10       0.00     0.04
    77  15.0580      0.00    -0.03       0.00    -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.

03QB91    quality flag:3

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

axisobj        39.447    39.448    39.447
ecceobj         0.189     0.189     0.189
incobj          6.490     6.490     6.490
qmin           30.690    30.691    30.688
qmax           48.854    48.855    48.855
amean          39.456    39.456    39.456
amin           38.995    38.990    38.993
amax           39.993    39.993    39.993
emean           0.204     0.204     0.204
emin            0.186     0.185     0.186
emax            0.223     0.223     0.223
imean           5.052     5.051     5.052
imin            4.513     4.513     4.514
imax            5.581     5.581     5.581
excite_mean     0.223     0.223     0.223
fracstop        1.000     1.000     1.000
cjmean          2.996     2.996     2.996

libcent 0       180.2     180.3     180.3
libamp  0        93.1      93.3      92.8
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       173.0     172.9     173.1
kozaiamp        180.0     180.0     180.0