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 Mon Oct 23 01:37:25 2017
# Orbit generated from Bernstein formalism
# Fitting   40 observations of   40
# Arc:  11.06y
# First observation: 2003/08/24
#  Last observation: 2014/09/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000384   0.028993   0.000019   0.001379   0.028215   0.000000
# Chi-squared of fit:    39.66 DOF:   74 RMS:  0.18
# Min/Max residuals:    -0.77    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.636038E-05  2.892347E-02  9.640316E-07  1.372800E-03  2.652738E-02  1.766506E-03
# Covariance matrix:
  1.3611E-13 -4.2132E-14  9.4605E-16 -1.4382E-15 -1.0899E-14 -9.3830E-14
 -4.2132E-14  4.4939E-14 -1.5767E-15  2.0273E-15 -1.3036E-15  1.3164E-13
  9.4605E-16 -1.5767E-15  1.1297E-13 -1.1329E-14  1.8099E-15 -4.8077E-15
 -1.4382E-15  2.0273E-15 -1.1329E-14  1.7506E-15 -1.4061E-16  6.1665E-15
 -1.0899E-14 -1.3036E-15  1.8099E-15 -1.4061E-16  1.1666E-13 -4.7726E-15
 -9.3830E-14  1.3164E-13 -4.8077E-15  6.1665E-15 -4.7726E-15  4.0038E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.271061  -47.981740   -0.320535    0.038226   -0.962739  2452875.631273
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:           18.61531 +/-     0.005
Argument of Peri:       12.36287 +/-     0.008
Long of Asc Node:      273.30482 +/-     0.001
Inclination:             3.50223 +/-     0.000
Eccentricity:         0.17875925 +/-    0.0000
Semi-Major Axis:     46.29950425 +/-    0.0033
Time of Perihelion: 2446920.3109 +/-       1.6
Perihelion:          38.02303974 +/-    0.0035
Aphelion:            54.57596875 +/-    0.0045
Period (y)              315.0451 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.09396882 +/-    0.0003
Ecliptic Y          -28.48143330 +/-    0.0004
Ecliptic Z            1.49385006 +/-    0.0000
Ecliptic XDOT         0.00233068 +/-    0.0000
Ecliptic YDOT         0.00186127 +/-    0.0000
Ecliptic ZDOT         0.00014897 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.65642042 +/-    0.0003
Geocenter to KBO     37.69689843 +/-    0.0005
# Hcoef:  6.34

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      
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      
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  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 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  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  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  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      

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     0.18       0.00    -0.03
  2   0.0025    -64.23    -0.03      -0.62    -0.22
  3   0.0028    -72.08    -0.02      -0.66    -0.22
  4   0.1043  -2121.72    -0.77     -55.16     0.04
  5   0.1046  -2123.64     0.06     -55.03     0.31
  6   0.1072  -2155.58     0.28     -57.82    -0.24
  7   0.2463  -1877.49     0.15    -195.13     0.11
  8   0.2490  -1831.65    -0.07    -197.98    -0.08
  9   0.2518  -1783.80     0.08    -200.67    -0.14
 10   0.8193  10457.57     0.25     179.69     0.22
 11   0.8220  10411.92     0.01     182.82     0.05
 12   0.8360  10157.16    -0.11     199.30    -0.07
 13   0.8361  10154.89     0.05     199.35    -0.17
 14   4.9369  31481.33    -0.29    1406.85     0.34
 15   4.9371  31476.75     0.15    1406.83     0.22
 16   5.9252  37793.54     0.07    1686.02     0.37
 17   5.9255  37787.12     0.24    1685.97     0.16
 18   7.9270  49823.76    -0.34    2261.13    -0.12
 19   7.9271  49823.13     0.10    2261.31     0.03
 20   7.9271  49820.74    -0.16    2260.99    -0.33
 21  10.2562  56187.73    -0.03    2549.49    -0.00
 22  10.2563  56187.81    -0.08    2549.51     0.03
 23  10.2563  56188.08     0.06    2549.19    -0.27
 24  10.8457  70016.66    -0.12    3063.70     0.11
 25  10.8457  70015.71    -0.05    3063.59    -0.10
 26  10.8458  70015.31     0.06    3063.71    -0.04
 27  10.9442  67794.70    -0.16    3149.95    -0.04
 28  10.9442  67793.80    -0.00    3149.96    -0.05
 29  10.9442  67792.72    -0.02    3150.01    -0.02
 30  10.9905  66425.45    -0.02    3152.23    -0.05
 31  10.9906  66424.34    -0.06    3152.03    -0.24
 32  10.9906  66423.46     0.15    3152.29     0.02
 33  10.9906  66422.29     0.06    3152.34     0.07
 34  11.0096  65847.70     0.07    3146.14     0.11
 35  11.0097  65846.48    -0.01    3146.08     0.06
 36  11.0097  65845.43     0.09    3146.28     0.27
 37  11.0097  65844.10    -0.10    3146.07     0.06
 38  11.0641  64273.47     0.36    3106.98    -0.04
 39  11.0642  64272.22     0.05    3106.95    -0.04
 40  11.0642  64271.14    -0.07    3106.88    -0.08

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:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.640    46.650    46.630
ecceobj         0.183     0.184     0.183
incobj          3.501     3.501     3.501
qmin           37.436    37.378    37.348
qmax           56.203    56.292    56.241
amean          46.602    46.599    46.593
amin           46.188    46.181    46.184
amax           47.080    47.087    47.084
emean           0.181     0.180     0.181
emin            0.165     0.166     0.166
emax            0.196     0.196     0.195
imean           5.385     5.386     5.384
imin            4.645     4.647     4.639
imax            6.071     6.077     6.103
excite_mean     0.204     0.203     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       173.3     173.3     173.4
kozaiamp        179.9     180.0     179.9