Orbit Fit and Astrometric record for 08QB43

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: 08QB43    
# Created Wed Dec 13 02:37:33 2017
# Orbit generated from Bernstein formalism
# Fitting   26 observations of   26
# Arc:  16.80y
# First observation: 2000/10/02
#  Last observation: 2017/07/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.012541   0.027127  -0.005708   0.012772   0.029187   0.000000
# Chi-squared of fit:   116.58 DOF:   46 RMS:  0.37
# Min/Max residuals:    -0.81    0.80
# Exact a, adot, b, bdot, g, gdot:
  1.366225E-05  2.416707E-02  9.265115E-06  1.134021E-02  2.598322E-02 -2.326375E-03
# Covariance matrix:
  4.4482E-13 -7.0510E-14  8.0277E-14 -2.3674E-14 -5.4242E-14 -9.8630E-14
 -7.0510E-14  1.6611E-14 -2.3258E-14  6.8627E-15  6.4083E-15  2.8717E-14
  8.0277E-14 -2.3258E-14  3.0076E-13 -3.0713E-14 -1.2678E-14 -4.5233E-14
 -2.3674E-14  6.8627E-15 -3.0713E-14  5.0306E-15  3.6852E-15  1.3346E-14
 -5.4242E-14  6.4083E-15 -1.2678E-14  3.6852E-15  1.4566E-13  1.3489E-14
 -9.8630E-14  2.8717E-14 -4.5233E-14  1.3346E-14  1.3489E-14  5.5834E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.878051  -22.308341   -0.519575    0.130743   -0.838215  2451819.787080
# Heliocentric elements and errors
Epoch:              2451810.5000  =  2000/09/23
Mean Anomaly:          312.58377 +/-     0.017
Argument of Peri:       76.47046 +/-     0.021
Long of Asc Node:      320.51393 +/-     0.000
Inclination:            26.36489 +/-     0.000
Eccentricity:         0.10036923 +/-    0.0000
Semi-Major Axis:     41.92763916 +/-    0.0027
Time of Perihelion: 2464871.4130 +/-       4.6
Perihelion:          37.71939416 +/-    0.0027
Aphelion:            46.13588416 +/-    0.0032
Period (y)              271.4931 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.16682131 +/-    0.0005
Ecliptic Y          -14.27035991 +/-    0.0002
Ecliptic Z            5.94004323 +/-    0.0001
Ecliptic XDOT         0.00056443 +/-    0.0000
Ecliptic YDOT         0.00252280 +/-    0.0000
Ecliptic ZDOT         0.00114293 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.33149183 +/-    0.0005
Geocenter to KBO     38.48637154 +/-    0.0006
# Hcoef:  5.31

The following table shows the complete astrometric record for 08QB43. 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 (08QB43) followed by the observatory code and reference code for the source of the astrometry.

2000 10  02.286337 22 24 18.66   -00 26 04.9   21.6V 08QB43    645  C~2KuI      
2000 10  02.287167 22 24 18.66   -00 26 05.0   21.6V 08QB43    645  C~2KuI      
2000 10  02.289654 22 24 18.65   -00 26 05.0   22.2V 08QB43    645  C~2KuI      
2008 08  25.26396  23 01 42.283  +08 52 17.33  21.7R 08QB43    675  C~0Abb      
2008 08  25.31084  23 01 42.070  +08 52 16.82  21.6R 08QB43    675  C~0Abb      
2008 08  26.23269  23 01 37.524  +08 51 59.63  21.1R 08QB43    675  C~0Abb      
2008 08  26.27638  23 01 37.222  +08 51 58.42  21.7R 08QB43    675  C~0Abb      
2008 09  19.13023  22 59 37.31   +08 42 29.2         08QB43    675  C~0Abb      
2008 09  19.23726  22 59 36.80   +08 42 26.6         08QB43    675  C~0Abb      
2008 09  19.29176  22 59 36.49   +08 42 24.9         08QB43    675  C~0Abb      
2008 10  17.14491  22 57 34.61   +08 28 16.9         08QB43    675  C~0Abb      
2008 10  17.19910  22 57 34.38   +08 28 15.4         08QB43    675  C~0Abb      
2008 10  17.25372  22 57 34.19   +08 28 13.5         08QB43    675  C~0Abb      
2009 07  03.44431  23 09 21.66   +10 00 33.7         08QB43    675  C~0Abb      
2009 07  04.44110  23 09 19.95   +10 00 51.9         08QB43    675  C~0Abb      
2013 11  06.09493  23 19 06.462  +13 59 00.83  20.6R 08QB43    G37              
2013 11  06.17304  23 19 06.247  +13 58 58.40        08QB43    G37              
2016 09  02.15897  23 38 14.95   +17 55 21.2   20.5R 08QB43    W67  C~1zsv      
2016 09  02.22655  23 38 14.59   +17 55 19.8   21.0R 08QB43    W67  C~1zsv      
2016 09  08.10118  23 37 44.31   +17 53 37.5   20.6R 08QB43    W67  C~1zsv      
2016 09  08.15100  23 37 44.05   +17 53 36.2   20.7R 08QB43    W67  C~1zsv      
2016 11  05.47874  23 33 14.80   +17 22 31.9   19.5R 08QB43    D29  C~21Qr      
2016 11  05.49553  23 33 14.74   +17 22 31.5   20.9R 08QB43    D29  C~21Qr      
2016 11  05.51233  23 33 14.72   +17 22 31.6   19.7R 08QB43    D29  C~21Qr      
2017 07  23.04230  23 45 56.40   +19 01 15.8         08QB43    104  C~2IBM      
2017 07  23.08327  23 45 56.28   +19 01 17.2   21.2  08QB43    104  C~2IBM      

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     0.22       0.00    -0.49
  2   0.0000     -0.04     0.23      -0.09    -0.58
  3   0.0000     -0.18     0.25      -0.04    -0.52
  4   7.8959  44210.79     0.13   19320.00     0.60
  5   7.8960  44207.51     0.57   19320.64     0.80
  6   7.8986  44135.05     0.61   19328.17     0.35
  7   7.8987  44130.21    -0.74   19328.60     0.40
  8   7.9640  42177.91    -0.58   19416.49    -0.18
  9   7.9643  42169.55    -0.08   19416.70     0.08
 10   7.9644  42164.43    -0.68   19416.71     0.12
 11   8.0407  40083.76     0.16   19249.25     0.12
 12   8.0408  40079.88    -0.20   19249.03     0.44
 13   8.0410  40076.42    -0.10   19248.22     0.17
 14   8.7506  52502.03    -0.34   20881.33    -0.09
 15   8.7533  52483.94     0.02   20908.13    -0.01
 16  13.0946  66914.13    -0.19   32172.11     0.06
 17  13.0948  66909.88    -0.18   32170.71     0.26
 18  15.9175  90813.26     0.26   41589.84     0.36
 19  15.9177  90806.83    -0.08   41589.95     0.02
 20  15.9338  90272.91     0.05   41616.83     0.20
 21  15.9339  90268.15    -0.06   41616.60    -0.19
 22  16.0936  85151.65    -0.05   40843.17    -0.81
 23  16.0937  85150.53    -0.08   40843.02    -0.54
 24  16.0937  85150.25     0.74   40843.22     0.08
 25  16.8043 100131.80     0.00   43880.25    -0.69
 26  16.8044 100130.42     0.09   43882.33     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.

08QB43    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        42.011    42.019    42.003
ecceobj         0.101     0.101     0.101
incobj         26.337    26.337    26.337
qmin           37.271    37.269    37.274
qmax           46.587    46.616    46.602
amean          41.810    41.813    41.811
amin           41.477    41.470    41.478
amax           42.167    42.181    42.163
emean           0.092     0.092     0.092
emin            0.080     0.078     0.080
emax            0.105     0.106     0.105
imean          27.634    27.642    27.641
imin           27.249    27.311    27.260
imax           27.962    27.993    27.972
excite_mean     0.473     0.473     0.473
fracstop        1.000     1.000     1.000
cjmean          2.799     2.799     2.799

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       178.9     175.7     178.9
kozaiamp        180.0     180.0     180.0