Orbit Fit and Astrometric record for 03QR91

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: 03QR91    
# Created Thu Dec  9 02:09:37 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting    106 observations of    106
# Arc:  16.99y
# First observation: 2003/08/24
#  Last observation: 2020/08/19
# Chi-squared of fit:    83.66 DOF:    206 RMS:  0.16
# Min/Max residuals:    -0.76    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.625437E-05  2.892363E-02  9.298163E-07  1.372778E-03  2.652733E-02  1.766906E-03
# Covariance matrix:
  1.2315E-13 -2.2056E-14  1.3971E-15 -6.6758E-16 -1.0528E-14 -3.2275E-14
 -2.2056E-14  7.1575E-15 -6.6728E-16  3.0021E-16  1.8733E-15  1.4430E-14
  1.3971E-15 -6.6728E-16  9.0360E-14 -7.7974E-15  5.6688E-16 -1.5208E-15
 -6.6758E-16  3.0021E-16 -7.7974E-15  7.9851E-16  4.5215E-17  6.8029E-16
 -1.0528E-14  1.8733E-15  5.6688E-16  4.5215E-17  4.9249E-14  3.6089E-15
 -3.2275E-14  1.4430E-14 -1.5208E-15  6.8029E-16  3.6089E-15  3.2681E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.271061  -47.981740   -0.320535    0.038226   -0.962738  2452875.631273
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:           18.63447 +/-     0.003
Argument of Peri:       12.36143 +/-     0.004
Long of Asc Node:      273.30426 +/-     0.001
Inclination:             3.50218 +/-     0.000
Eccentricity:         0.17878427 +/-    0.0000
Semi-Major Axis:     46.30079592 +/-    0.0020
Time of Perihelion: 2446919.9374 +/-       1.0
Perihelion:          38.02294184 +/-    0.0021
Aphelion:            54.57864999 +/-    0.0027
Period (y)              315.0583 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.09401325 +/-    0.0002
Ecliptic Y          -28.48148857 +/-    0.0002
Ecliptic Z            1.49385157 +/-    0.0000
Ecliptic XDOT         0.00233073 +/-    0.0000
Ecliptic YDOT         0.00186125 +/-    0.0000
Ecliptic ZDOT         0.00014897 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.65644612 +/-    0.0002
Geocenter to KBO     37.69697464 +/-    0.0003
# Hcoef:  6.58

The following table shows the complete astrometric record for 03QR91. 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 (03QR91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  24.13053  20 55 17.99   -15 00 24.1   20.8R 03QR91    807  Ci4137      
2003 08  25.02878  20 55 13.74   -15 00 42.4         03QR91    807  Ci4137      
2003 08  25.13748  20 55 13.22   -15 00 44.6         03QR91    807  Ci4137      
2003 10  01.24329  20 52 58.16   -15 10 59.3   21.9R 03QR91    568  Ci6964      
2003 10  01.32035  20 52 58.03   -15 10 59.7         03QR91    568  Ci6964      
2003 10  02.27989  20 52 55.96   -15 11 11.1         03QR91    568  Ci6964      
2003 11  22.07617  20 53 17.03   -15 12 07.2   21.9R 03QR91    695  C~077P      
2003 11  23.08471  20 53 20.13   -15 11 57.4         03QR91    695  Cj8802      
2003 11  24.09590  20 53 23.36   -15 11 46.9         03QR91    695  Cj8802      
2004 06  18.37920  21 06 45.09   -14 08 27.8   22.1R 03QR91    688  Ck9832      
2004 06  19.35949  21 06 42.03   -14 08 37.9         03QR91    688  Ck9832      
2004 06  24.47336  21 06 24.97   -14 09 35.2   22.1R 03QR91    568  Ck9832      
2004 06  24.51838  21 06 24.82   -14 09 35.8         03QR91    568  Ck9832      
2008 07  31.34526  21 28 58.69   -12 05 41.3   22.3R 03QR91    688  Cz3503      
2008 07  31.41069  21 28 58.40   -12 05 42.7         03QR91    688  Cz3503      
2009 07  27.31387  21 35 30.19   -11 29 31.6   22.2R 03QR91    688  C~07qY      
2009 07  27.40204  21 35 29.79   -11 29 33.6         03QR91    688  C~07qY      
2010 08  05.49998  21 40 56.062  -10 57 52.07  22.1G 03QR91    F51  C~2r7B      
2010 08  31.41333  21 38 51.299  -11 08 13.85  22.8G 03QR91    F51  C~2r7B      
2010 08  31.42438  21 38 51.220  -11 08 14.02  22.3G 03QR91    F51  C~2r7B      
2010 08  31.43815  21 38 51.172  -11 08 14.41  21.9G 03QR91    F51  C~2r7B      
2010 08  31.44979  21 38 51.109  -11 08 15.03  22.5G 03QR91    F51  C~2r7B      
2011 07  28.47692  21 47 38.729  -10 19 38.46  22.6w 03QR91    F51  C~1vVF      
2011 07  28.49116  21 47 38.687  -10 19 38.49  22.3w 03QR91    F51  C~1vVF      
2011 07  28.51960  21 47 38.549  -10 19 39.51  22.7w 03QR91    F51  C~1vVF      
2011 08  17.38329  21 46 04.754  -10 27 18.47  22.1G 03QR91    F51  C~2r7B      
2012 08  13.41357  21 52 21.441  -09 50 38.72  22.3G 03QR91    F51  C~2r7B      
2012 08  13.42805  21 52 21.379  -09 50 38.99  22.5G 03QR91    F51  C~2r7B      
2012 08  13.44259  21 52 21.304  -09 50 39.36  22.6G 03QR91    F51  C~2r7B      
2012 08  13.45735  21 52 21.228  -09 50 39.69  22.6G 03QR91    F51  C~2r7B      
2012 12  07.22526  21 48 36.143  -10 15 26.30  22.8G 03QR91    F51  C~2r7B      
2013 05  16.56586  22 01 49.927  -09 01 49.61  22.4G 03QR91    F51  C~2r7B      
2013 05  20.59870  22 01 54.273  -09 01 04.28  23.0G 03QR91    F51  C~2r7B      
2013 07  15.47678  22 00 25.545  -09 04 47.74  22.5G 03QR91    F51  C~2r7B      
2013 07  15.49111  22 00 25.496  -09 04 47.94  22.1G 03QR91    F51  C~2r7B      
2013 07  15.50542  22 00 25.422  -09 04 48.38  22.6G 03QR91    F51  C~2r7B      
2013 07  15.51973  22 00 25.377  -09 04 48.50  22.3G 03QR91    F51  C~2r7B      
2013 11  25.22460  21 53 54.771  -09 42 57.32  22.5w 03QR91    F51  C~1vVF      
2013 11  25.22958  21 53 54.775  -09 42 57.28  22.5w 03QR91    F51  C~1vVF      
2013 11  25.23461  21 53 54.798  -09 42 57.49  22.6w 03QR91    F51  C~1vVF      
2014 06  22.59540  22 07 22.044  -08 24 49.81  22.0G 03QR91    F51  C~2r7B      
2014 06  26.56392  22 07 13.696  -08 25 17.31  22.8G 03QR91    F51  C~2r7B      
2014 06  28.50695  22 07 09.124  -08 25 33.61  22.2w 03QR91    F51  C~1vVF      
2014 06  28.53114  22 07 09.072  -08 25 33.99  22.5w 03QR91    F51  C~1vVF      
2014 06  28.54319  22 07 09.047  -08 25 34.01  22.2w 03QR91    F51  C~1vVF      
2014 07  06.59602  22 06 47.090  -08 27 00.96  21.4G 03QR91    F51  C~2r7B      
2014 07  25.54275  22 05 38.768  -08 32 13.49  22.8G 03QR91    F51  C~2r7B      
2014 08  03.48567  22 05 00.258  -08 35 23.83  22.4w 03QR91    F51  C~1vVF      
2014 08  03.49910  22 05 00.206  -08 35 24.09  22.2w 03QR91    F51  C~1vVF      
2014 08  03.51255  22 05 00.143  -08 35 24.37  22.3w 03QR91    F51  C~1vVF      
2014 08  04.47795  22 04 55.838  -08 35 46.42  22.4G 03QR91    F51  C~2r7B      
2014 08  04.49133  22 04 55.770  -08 35 46.56  22.3G 03QR91    F51  C~2r7B      
2014 08  04.50468  22 04 55.703  -08 35 46.97  22.3G 03QR91    F51  C~2r7B      
2014 08  05.50650  22 04 51.177  -08 36 09.60  22.5G 03QR91    F51  C~2r7B      
2014 08  20.42082  22 03 41.478  -08 42 13.67  22.3w 03QR91    F51  C~1vVF      
2014 08  20.43364  22 03 41.418  -08 42 14.18  22.3w 03QR91    F51  C~1vVF      
2014 08  20.44650  22 03 41.362  -08 42 14.21  22.4w 03QR91    F51  C~1vVF      
2014 08  20.45933  22 03 41.293  -08 42 14.52  22.4w 03QR91    F51  C~1vVF      
2014 08  21.39768  22 03 36.823  -08 42 38.67  22.7G 03QR91    F51  C~2r7B      
2014 08  27.39469  22 03 08.283  -08 45 13.10  22.4w 03QR91    F51  C~1vVF      
2014 08  27.40829  22 03 08.214  -08 45 13.52  22.3w 03QR91    F51  C~1vVF      
2014 08  27.42195  22 03 08.149  -08 45 13.66  22.4w 03QR91    F51  C~1vVF      
2014 08  27.43555  22 03 08.077  -08 45 14.25  22.4w 03QR91    F51  C~1vVF      
2014 09  02.38594  22 02 40.109  -08 47 48.88  22.8G 03QR91    F51  C~2r7B      
2014 09  12.37468  22 01 54.866  -08 52 04.91  23.3G 03QR91    F51  C~2r7B      
2014 09  16.30812  22 01 38.004  -08 53 42.85  22.4w 03QR91    F51  C~1vVF      
2014 09  16.32073  22 01 37.932  -08 53 43.25  22.2w 03QR91    F51  C~1vVF      
2014 09  16.33339  22 01 37.871  -08 53 43.64  22.4w 03QR91    F51  C~1vVF      
2014 11  10.24142  21 59 28.379  -09 08 28.15  23.0G 03QR91    F51  C~2r7B      
2014 11  17.28379  21 59 30.908  -09 08 45.01  22.4G 03QR91    F51  C~2r7B      
2015 07  12.52190  22 12 16.264  -07 52 43.59  22.4G 03QR91    F51  C~2r7B      
2015 07  14.55393  22 12 09.464  -07 53 14.02  22.6G 03QR91    F51  C~2r7B      
2015 08  21.40862  22 09 28.433  -08 06 49.70  22.2G 03QR91    F51  C~2r7B      
2015 08  21.41983  22 09 28.391  -08 06 50.08  22.9G 03QR91    F51  C~2r7B      
2015 08  21.43097  22 09 28.323  -08 06 50.01  22.4G 03QR91    F51  C~2r7B      
2015 08  21.44209  22 09 28.279  -08 06 50.67  22.1G 03QR91    F51  C~2r7B      
2015 09  09.36205  22 07 59.937  -08 15 05.29  22.7G 03QR91    F51  C~2r7B      
2015 09  09.36272  22 07 59.932  -08 15 05.34  22.6G 03QR91    F51  C~2r7B      
2015 09  09.37322  22 07 59.887  -08 15 05.52  22.3G 03QR91    F51  C~2r7B      
2015 09  09.37390  22 07 59.878  -08 15 05.80  22.3G 03QR91    F51  C~2r7B      
2015 09  09.38509  22 07 59.831  -08 15 05.86  22.0G 03QR91    F51  C~2r7B      
2015 09  09.39621  22 07 59.783  -08 15 06.44  22.2G 03QR91    F51  C~2r7B      
2015 10  26.25985  22 05 26.164  -08 31 22.78  22.6G 03QR91    F51  C~2r7B      
2015 11  03.27870  22 05 16.532  -08 32 48.96  22.7G 03QR91    F51  C~2r7B      
2015 11  04.29230  22 05 15.745  -08 32 58.25  23.4G 03QR91    F51  C~2r7B      
2016 08  03.45756  22 16 34.100  -07 24 03.80  22.4G 03QR91    F51  C~2r7B      
2016 08  03.46932  22 16 34.049  -07 24 03.86  22.5G 03QR91    F51  C~2r7B      
2016 08  03.48106  22 16 33.984  -07 24 04.39  22.3G 03QR91    F51  C~2r7B      
2016 08  03.49282  22 16 33.920  -07 24 04.63  22.2G 03QR91    F51  C~2r7B      
2016 10  30.26169  22 11 03.063  -07 57 11.96  23.1G 03QR91    F51  C~2r7B      
2017 07  25.51715  22 22 54.616  -06 45 03.88  23.0G 03QR91    F51  C~2r7B      
2017 07  25.52772  22 22 54.587  -06 45 03.97  23.1G 03QR91    F51  C~2r7B      
2017 07  25.53829  22 22 54.536  -06 45 04.36  22.7G 03QR91    F51  C~2r7B      
2017 07  25.54887  22 22 54.497  -06 45 04.56  23.2G 03QR91    F51  C~2r7B      
2017 08  03.48948  22 22 18.280  -06 48 08.78  22.7G 03QR91    F51  C~2r7B      
2017 08  17.43459  22 21 16.193  -06 53 41.33  22.2G 03QR91    F51  C~2r7B      
2017 08  17.44556  22 21 16.118  -06 53 41.58  23.6G 03QR91    F51  C~2r7B      
2017 08  17.45652  22 21 16.091  -06 53 41.99  22.8G 03QR91    F51  C~2r7B      
2017 08  17.46749  22 21 16.017  -06 53 42.16  22.6G 03QR91    F51  C~2r7B      
2017 09  12.31378  22 19 16.504  -07 05 07.34  22.8G 03QR91    F51  C~2r7B      
2017 09  12.32540  22 19 16.463  -07 05 07.87  22.3G 03QR91    F51  C~2r7B      
2017 09  12.33702  22 19 16.407  -07 05 07.89  22.2G 03QR91    F51  C~2r7B      
2017 09  12.34865  22 19 16.343  -07 05 08.56  22.7G 03QR91    F51  C~2r7B      
2020 08  19.42780  22 38 02.185  -05 06 52.49  22.7w 03QR91    F51  C~43qE      
2020 08  19.43972  22 38 02.124  -05 06 52.39  22.4w 03QR91    F51  C~43qE      
2020 08  19.46362  22 38 02.015  -05 06 53.18  22.6w 03QR91    F51  C~43qE      

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     0.21       0.00     0.03
     2   0.0025      0.00     0.05       0.00    -0.20
     3   0.0028      0.00     0.06       0.00    -0.21
     4   0.1043      0.00    -0.76       0.00    -0.16
     5   0.1046      0.00    -0.02       0.00     0.33
     6   0.1072      0.00     0.36       0.00    -0.14
     7   0.2463      0.00     0.12       0.00     0.16
     8   0.2490      0.00    -0.04       0.00    -0.09
     9   0.2518      0.00     0.12       0.00    -0.10
    10   0.8193      0.00     0.19       0.00     0.30
    11   0.8220      0.00     0.00       0.00     0.06
    12   0.8360      0.00    -0.08       0.00    -0.08
    13   0.8361      0.00     0.11       0.00    -0.13
    14   4.9369      0.00    -0.44       0.00     0.24
    15   4.9371      0.00     0.00       0.00     0.26
    16   5.9252      0.00    -0.12       0.00     0.38
    17   5.9255      0.00     0.10       0.00     0.23
    18   6.9497      0.00    -0.22       0.00    -0.06
    19   7.0206      0.00     0.26       0.00    -0.00
    20   7.0207      0.00    -0.14       0.00     0.10
    21   7.0207      0.00     0.12       0.00     0.04
    22   7.0207      0.00     0.01       0.00    -0.30
    23   7.9270      0.00    -0.34       0.00    -0.19
    24   7.9271      0.00     0.01       0.00     0.08
    25   7.9271      0.00    -0.11       0.00    -0.34
    26   7.9815      0.00     0.02       0.00    -0.09
    27   8.9727      0.00     0.07       0.00    -0.09
    28   8.9728      0.00     0.20       0.00    -0.00
    29   8.9728      0.00     0.14       0.00    -0.02
    30   8.9728      0.00     0.08       0.00     0.01
    31   9.2898      0.00     0.17       0.00    -0.13
    32   9.7288      0.00     0.00       0.00    -0.25
    33   9.7398      0.00    -0.06       0.00     0.13
    34   9.8928      0.00     0.11       0.00     0.08
    35   9.8928      0.00     0.20       0.00     0.12
    36   9.8929      0.00    -0.10       0.00    -0.08
    37   9.8929      0.00     0.05       0.00     0.04
    38  10.2562      0.00    -0.11       0.00     0.01
    39  10.2563      0.00    -0.17       0.00     0.02
    40  10.2563      0.00     0.05       0.00    -0.21
    41  10.8295      0.00     0.17       0.00    -0.35
    42  10.8403      0.00     0.19       0.00    -0.03
    43  10.8457      0.00    -0.17       0.00     0.10
    44  10.8457      0.00    -0.04       0.00    -0.06
    45  10.8458      0.00     0.03       0.00     0.03
    46  10.8678      0.00     0.07       0.00     0.24
    47  10.9197      0.00     0.10       0.00    -0.07
    48  10.9442      0.00    -0.17       0.00    -0.05
    49  10.9442      0.00    -0.03       0.00    -0.01
    50  10.9442      0.00    -0.06       0.00     0.02
    51  10.9469      0.00     0.22       0.00    -0.18
    52  10.9469      0.00     0.12       0.00    -0.02
    53  10.9470      0.00     0.03       0.00    -0.12
    54  10.9497      0.00    -0.06       0.00     0.16
    55  10.9905      0.00    -0.05       0.00    -0.01
    56  10.9906      0.00    -0.02       0.00    -0.20
    57  10.9906      0.00     0.08       0.00     0.10
    58  10.9906      0.00    -0.03       0.00     0.12
    59  10.9932      0.00    -0.10       0.00    -0.07
    60  11.0096      0.00    -0.03       0.00     0.15
    61  11.0097      0.00    -0.08       0.00     0.09
    62  11.0097      0.00    -0.06       0.00     0.30
    63  11.0097      0.00    -0.16       0.00     0.06
    64  11.0260      0.00     0.10       0.00    -0.04
    65  11.0534      0.00    -0.31       0.00     0.01
    66  11.0641      0.00     0.26       0.00     0.11
    67  11.0642      0.00    -0.00       0.00     0.02
    68  11.0642      0.00    -0.10       0.00    -0.06
    69  11.2145      0.00    -0.04       0.00    -0.04
    70  11.2338      0.00     0.03       0.00    -0.02
    71  11.8833      0.00     0.09       0.00    -0.13
    72  11.8889      0.00     0.04       0.00    -0.04
    73  11.9925      0.00    -0.11       0.00     0.01
    74  11.9926      0.00     0.07       0.00    -0.08
    75  11.9926      0.00    -0.15       0.00     0.28
    76  11.9926      0.00    -0.00       0.00    -0.09
    77  12.0444      0.00     0.08       0.00     0.09
    78  12.0444      0.00     0.06       0.00     0.06
    79  12.0445      0.00     0.10       0.00     0.15
    80  12.0445      0.00     0.02       0.00    -0.11
    81  12.0445      0.00     0.08       0.00     0.12
    82  12.0445      0.00     0.13       0.00    -0.17
    83  12.1728      0.00    -0.04       0.00    -0.01
    84  12.1948      0.00     0.06       0.00     0.20
    85  12.1976      0.00     0.17       0.00    -0.39
    86  12.9455      0.00     0.16       0.00     0.03
    87  12.9455      0.00     0.18       0.00     0.23
    88  12.9455      0.00    -0.02       0.00    -0.04
    89  12.9456      0.00    -0.20       0.00    -0.01
    90  13.1858      0.00     0.25       0.00     0.11
    91  13.9203      0.00    -0.18       0.00     0.17
    92  13.9203      0.00     0.01       0.00     0.29
    93  13.9203      0.00    -0.13       0.00     0.10
    94  13.9204      0.00    -0.09       0.00     0.10
    95  13.9449      0.00     0.08       0.00     0.20
    96  13.9830      0.00     0.00       0.00    -0.07
    97  13.9831      0.00    -0.35       0.00    -0.04
    98  13.9831      0.00     0.02       0.00    -0.17
    99  13.9831      0.00    -0.32       0.00    -0.06
   100  14.0539      0.00     0.04       0.00     0.03
   101  14.0539      0.00     0.21       0.00    -0.19
   102  14.0540      0.00     0.16       0.00     0.09
   103  14.0540      0.00    -0.01       0.00    -0.27
   104  16.9892      0.00     0.08       0.00    -0.25
   105  16.9892      0.00    -0.01       0.00     0.15
   106  16.9893      0.00    -0.00       0.00    -0.03

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.

03QR91    quality flag:2

Type:       SCATNEAR CLASSICAL CLASSICAL

axisobj        46.641    46.641    46.641
ecceobj         0.183     0.183     0.183
incobj          3.501     3.501     3.501
qmin           37.363    37.379    37.406
qmax           56.178    56.212    56.272
amean          46.597    46.602    46.600
amin           46.172    46.178    46.185
amax           47.107    47.105    47.109
emean           0.181     0.181     0.180
emin            0.165     0.165     0.165
emax            0.195     0.195     0.195
imean           5.392     5.389     5.387
imin            4.648     4.647     4.645
imax            6.128     6.092     6.066
excite_mean     0.204     0.204     0.204
fracstop        1.000     1.000     1.000
cjmean          3.082     3.082     3.082

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       173.4     173.0     173.4
kozaiamp        180.0     180.0     180.0