Orbit Fit and Astrometric record for 03QK91

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: 03QK91    
# Created Sat Jan 19 02:08:19 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   51 observations of   51
# Arc:  12.94y
# First observation: 2003/08/25
#  Last observation: 2016/08/03
# Chi-squared of fit:   236.74 DOF:   96 RMS:  0.38
# Min/Max residuals:    -0.97    1.44
# Exact a, adot, b, bdot, g, gdot:
  1.968356E-05  2.908568E-02  2.219275E-06  1.666870E-03  2.530830E-02 -5.333547E-03
# Covariance matrix:
  1.7698E-13 -4.4104E-14  2.8183E-15 -1.8012E-15 -1.6688E-14 -7.7687E-14
 -4.4104E-14  2.1053E-14 -1.7472E-15  1.0943E-15  5.9536E-15  4.7205E-14
  2.8183E-15 -1.7472E-15  1.2428E-13 -1.2230E-14  2.0676E-17 -4.1901E-15
 -1.8012E-15  1.0943E-15 -1.2230E-14  1.5840E-15  4.6352E-16  2.6526E-15
 -1.6688E-14  5.9536E-15  2.0676E-17  4.6352E-16  9.3388E-14  1.9830E-14
 -7.7687E-14  4.7205E-14 -4.1901E-15  2.6526E-15  1.9830E-14  1.1442E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.411353  -48.510067   -0.345365    0.040211   -0.953778  2452876.630013
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:          347.36576 +/-     0.002
Argument of Peri:       69.53924 +/-     0.003
Long of Asc Node:      276.13478 +/-     0.001
Inclination:             4.01674 +/-     0.000
Eccentricity:         0.42720119 +/-    0.0000
Semi-Major Axis:     67.10337972 +/-    0.0064
Time of Perihelion: 2459922.8078 +/-      27.7
Perihelion:          38.43673581 +/-    0.0048
Aphelion:            95.77002362 +/-    0.0096
Period (y)              549.6988 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.04243784 +/-    0.0003
Ecliptic Y          -30.05381804 +/-    0.0004
Ecliptic Z            1.66252518 +/-    0.0000
Ecliptic XDOT         0.00196476 +/-    0.0000
Ecliptic YDOT         0.00251629 +/-    0.0000
Ecliptic ZDOT         0.00015606 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.46355802 +/-    0.0003
Geocenter to KBO     39.51290269 +/-    0.0005
# Hcoef:  7.16

The following table shows the complete astrometric record for 03QK91. 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 (03QK91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  25.12927  20 53 02.29   -15 00 59.6   21.8R 03QK91    807  Ci4137      
2003 08  26.02489  20 52 58.36   -15 01 15.9         03QK91    807  Ci4137      
2003 08  26.12384  20 52 57.92   -15 01 17.7         03QK91    807  Ci4137      
2003 10  01.22477  20 50 56.45   -15 10 26.5   23.1R 03QK91    568  Ci6964      
2003 10  01.30181  20 50 56.29   -15 10 27.5         03QK91    568  Ci6964      
2003 10  02.22040  20 50 54.47   -15 10 37.4         03QK91    568  Ci6964      
2004 08  12.11446  21 00 31.29   -14 23 42.2   21.8R 03QK91    807  Cn7007      
2004 08  12.21694  21 00 30.79   -14 23 44.3         03QK91    807  Cn7007      
2005 06  09.24825  21 11 17.32   -13 33 29.0   22.5R 03QK91    304  Cn7007      
2005 06  09.28043  21 11 17.27   -13 33 29.3         03QK91    304  Cn7007      
2006 06  17.26905  21 17 31.78   -12 58 46.6   22.5R 03QK91    250  S~06Ad      
2006 06  17.33169  21 17 31.62   -12 58 47.0         03QK91    250  S~06Ad      
2006 06  17.33608  21 17 31.61   -12 58 47.0         03QK91    250  S~06Ad      
2006 06  17.34048  21 17 31.60   -12 58 47.1         03QK91    250  S~06Ad      
2007 09  11.23039  21 18 10.00   -12 47 47.6   22.5r 03QK91    695  Cv8575      
2007 09  11.29715  21 18 09.73   -12 47 48.9   22.6r 03QK91    695  Cv8575      
2008 06  07.34574  21 30 59.63   -11 44 17.3         03QK91    807  Cz1375      
2008 06  07.40408  21 30 59.54   -11 44 17.5         03QK91    807  Cz1375      
2008 09  24.176796 21 23 59.92   -12 15 07.4         03QK91    645  C~1PqY      
2008 09  24.177626 21 23 59.92   -12 15 07.4         03QK91    645  C~1PqY      
2008 09  24.180113 21 23 59.91   -12 15 07.4         03QK91    645  C~1PqY      
2011 07  22.46222  21 48 48.423  -09 54 49.46  23.9G 03QK91    F51  C~2r7B      
2011 07  28.49116  21 48 22.627  -09 56 46.66  22.8G 03QK91    F51  C~2r7B      
2011 08  31.40402  21 45 44.542  -10 09 51.48  22.9G 03QK91    F51  C~2r7B      
2012 08  13.41357  21 53 50.628  -09 22 10.50  23.0G 03QK91    F51  C~2r7B      
2012 08  13.42805  21 53 50.557  -09 22 11.12  23.2G 03QK91    F51  C~2r7B      
2012 08  13.45735  21 53 50.429  -09 22 11.67  23.3G 03QK91    F51  C~2r7B      
2013 05  20.60265  22 04 00.788  -08 28 29.27  22.8G 03QK91    F51  C~2r7B      
2013 06  20.55713  22 03 48.973  -08 26 30.26  23.0G 03QK91    F51  C~2r7B      
2013 08  12.44815  22 00 41.436  -08 40 15.26  23.0G 03QK91    F51  C~2r7B      
2013 08  12.46368  22 00 41.344  -08 40 15.83  22.4G 03QK91    F51  C~2r7B      
2013 08  12.47870  22 00 41.259  -08 40 16.14  22.7G 03QK91    F51  C~2r7B      
2013 08  12.49366  22 00 41.213  -08 40 16.23  22.6G 03QK91    F51  C~2r7B      
2013 11  25.23963  21 56 15.842  -09 08 39.74  23.3G 03QK91    F51  C~2r7B      
2014 06  26.56392  22 10 17.957  -07 45 14.89  22.9G 03QK91    F51  C~2r7B      
2014 06  28.53114  22 10 13.646  -07 45 28.44  23.1G 03QK91    F51  C~2r7B      
2014 07  06.59602  22 09 52.742  -07 46 44.36  23.7G 03QK91    F51  C~2r7B      
2014 07  25.55617  22 08 46.360  -07 51 35.52  22.7G 03QK91    F51  C~2r7B      
2014 08  20.43718  22 06 50.473  -08 01 21.77  23.0G 03QK91    F51  C~2r7B      
2014 08  27.42195  22 06 17.385  -08 04 20.72  22.9G 03QK91    F51  C~2r7B      
2014 09  02.37237  22 05 49.502  -08 06 55.18  22.7G 03QK91    F51  C~2r7B      
2014 09  16.34607  22 04 47.217  -08 12 52.84  23.3G 03QK91    F51  C~2r7B      
2015 06  25.57429  22 17 01.074  -07 02 47.97  23.1G 03QK91    F51  C~2r7B      
2015 06  27.59775  22 16 57.129  -07 02 58.92  23.2G 03QK91    F51  C~2r7B      
2015 07  28.50287  22 15 19.989  -07 09 49.57  22.7G 03QK91    F51  C~2r7B      
2015 08  21.41983  22 13 32.995  -07 19 02.02  22.8G 03QK91    F51  C~2r7B      
2015 09  09.39621  22 12 04.297  -07 27 20.26  22.2G 03QK91    F51  C~2r7B      
2015 12  01.22952  22 09 35.463  -07 46 27.34  22.8G 03QK91    F51  C~2r7B      
2016 07  06.56505  22 23 16.202  -06 21 22.44  23.3G 03QK91    F51  C~2r7B      
2016 07  11.52256  22 23 02.166  -06 22 18.36  23.5G 03QK91    F51  C~2r7B      
2016 08  03.48106  22 21 37.255  -06 28 58.13  23.4G 03QK91    F51  C~2r7B      

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    -0.24       0.00    -0.32
  2   0.0025      0.00    -0.09       0.00    -0.04
  3   0.0027      0.00    -0.07       0.00     0.00
  4   0.1016      0.00    -0.08       0.00     0.06
  5   0.1018      0.00    -0.01       0.00    -0.12
  6   0.1043      0.00     0.15       0.00    -0.44
  7   0.9664      0.00    -0.19       0.00    -0.06
  8   0.9667      0.00    -0.25       0.00    -0.13
  9   1.7909      0.00    -0.97       0.00    -0.22
 10   1.7910      0.00    -0.69       0.00    -0.36
 11   2.8122      0.00     1.42       0.00     0.47
 12   2.8123      0.00     1.41       0.00     0.54
 13   2.8123      0.00     1.42       0.00     0.57
 14   2.8124      0.00     1.44       0.00     0.50
 15   4.0468      0.00    -0.20       0.00     0.07
 16   4.0470      0.00    -0.23       0.00     0.09
 17   4.7864      0.00    -0.66       0.00     0.18
 18   4.7865      0.00    -0.66       0.00     0.10
 19   5.0843      0.00     0.01       0.00    -0.01
 20   5.0843      0.00     0.05       0.00     0.00
 21   5.0843      0.00     0.02       0.00     0.05
 22   7.9078      0.00    -0.21       0.00    -0.14
 23   7.9243      0.00    -0.49       0.00     0.10
 24   8.0172      0.00    -0.06       0.00    -0.09
 25   8.9700      0.00    -0.04       0.00     0.03
 26   8.9700      0.00    -0.06       0.00    -0.25
 27   8.9701      0.00     0.14       0.00    -0.10
 28   9.7371      0.00    -0.30       0.00    -0.30
 29   9.8218      0.00    -0.28       0.00    -0.11
 30   9.9667      0.00     0.04       0.00    -0.03
 31   9.9667      0.00    -0.23       0.00    -0.23
 32   9.9667      0.00    -0.43       0.00    -0.18
 33   9.9668      0.00    -0.05       0.00     0.09
 34  10.2536      0.00     0.45       0.00     0.16
 35  10.8376      0.00    -0.21       0.00    -0.00
 36  10.8430      0.00    -0.12       0.00     0.03
 37  10.8651      0.00    -0.32       0.00    -0.26
 38  10.9170      0.00    -0.02       0.00     0.00
 39  10.9878      0.00     0.08       0.00     0.07
 40  11.0070      0.00    -0.00       0.00    -0.06
 41  11.0233      0.00     0.26       0.00    -0.10
 42  11.0615      0.00     0.33       0.00    -0.12
 43  11.8342      0.00     0.04       0.00     0.07
 44  11.8397      0.00    -0.15       0.00     0.13
 45  11.9244      0.00    -0.23       0.00     0.27
 46  11.9898      0.00     0.25       0.00    -0.08
 47  12.0418      0.00     0.11       0.00    -0.01
 48  12.2686      0.00     0.33       0.00     0.11
 49  12.8664      0.00     0.23       0.00    -0.02
 50  12.8799      0.00     0.05       0.00     0.22
 51  12.9428      0.00     0.36       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.

03QK91    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        68.079    68.079    68.080
ecceobj         0.436     0.436     0.436
incobj          4.014     4.014     4.014
qmin           37.734    37.752    37.751
qmax           99.511    99.380    99.522
amean          67.776    67.752    67.740
amin           66.904    66.815    66.858
amax           68.986    68.898    69.002
emean           0.431     0.431     0.431
emin            0.421     0.420     0.421
emax            0.443     0.442     0.443
imean           5.774     5.767     5.757
imin            5.511     5.507     5.491
imax            6.094     6.055     6.121
excite_mean     0.443     0.442     0.442
fracstop        1.000     1.000     1.000
cjmean          3.138     3.138     3.137

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       184.1     184.4     188.8
kozaiamp        180.0     180.0     180.0