Orbit Fit and Astrometric record for 00QL251

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: 00QL251   
# Created Wed Oct 17 01:07:44 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   52 observations of   52
# Arc:   8.11y
# First observation: 2000/08/25
#  Last observation: 2008/10/03
# Chi-squared of fit:   180.22 DOF:   98 RMS:  0.33
# Min/Max residuals:    -0.68    0.75
# Exact a, adot, b, bdot, g, gdot:
  1.670077E-05  2.979110E-02 -1.248579E-06 -1.153254E-03  2.685902E-02  2.734298E-03
# Covariance matrix:
  2.2036E-13 -1.2787E-13 -4.0758E-15  4.3280E-15  4.2657E-14 -4.4992E-13
 -1.2787E-13  1.1649E-13  4.1950E-15 -4.3986E-15 -8.0920E-15  4.6067E-13
 -4.0758E-15  4.1950E-15  1.0566E-13 -1.6372E-14  2.0519E-16  1.7163E-14
  4.3280E-15 -4.3986E-15 -1.6372E-14  3.5844E-15  1.9595E-16 -1.7937E-14
  4.2657E-14 -8.0920E-15  2.0519E-16  1.9595E-16  2.6299E-13  4.8998E-15
 -4.4992E-13  4.6067E-13  1.7163E-14 -1.7937E-14  4.8998E-15  1.8822E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.030882   -9.715706    0.317119    0.050419   -0.955312  2451781.721203
# Heliocentric elements and errors
Epoch:              2451782.5000  =  2000/08/26
Mean Anomaly:           16.55574 +/-     0.008
Argument of Peri:      100.10760 +/-     0.012
Long of Asc Node:      223.48617 +/-     0.001
Inclination:             3.66555 +/-     0.000
Eccentricity:         0.21926646 +/-    0.0001
Semi-Major Axis:     48.01757626 +/-    0.0056
Time of Perihelion: 2446193.3612 +/-       2.7
Perihelion:          37.48893242 +/-    0.0058
Aphelion:            58.54622011 +/-    0.0078
Period (y)              332.7427 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.54124144 +/-    0.0007
Ecliptic Y           -6.74345376 +/-    0.0001
Ecliptic Z            1.96852228 +/-    0.0000
Ecliptic XDOT         0.00078566 +/-    0.0000
Ecliptic YDOT         0.00295048 +/-    0.0000
Ecliptic ZDOT        -0.00010250 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.19280077 +/-    0.0007
Geocenter to KBO     37.23141318 +/-    0.0007
# Hcoef:  6.68

The following table shows the complete astrometric record for 00QL251. 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 (00QL251) followed by the observatory code and reference code for the source of the astrometry.

2000 08  25.22046  23 19 31.63   -01 03 41.0   22.2R 00QL251   807  Cd1703      
2000 08  25.28442  23 19 31.34   -01 03 42.8         00QL251   807  Cd1703      
2000 09  21.22717  23 17 24.72   -01 17 21.1   21.9R 00QL251   695  Cd1703      
2000 09  21.29762  23 17 24.39   -01 17 23.1         00QL251   695  Cd1703      
2001 08  19.25242  23 26 20.86   -00 24 26.4   21.5R 00QL251   807  Cd7651      
2001 08  19.33589  23 26 20.50   -00 24 28.4         00QL251   807  Cd7651      
2001 08  20.30271  23 26 16.42   -00 24 53.4   21.4R 00QL251   807  Cd7651      
2001 08  20.38861  23 26 16.02   -00 24 55.6         00QL251   807  Cd7651      
2001 08  21.29828  23 26 12.14   -00 25 19.5   21.2R 00QL251   807  Cd7651      
2001 08  21.36656  23 26 11.85   -00 25 21.2         00QL251   807  Cd7651      
2001 09  16.30833  23 24 12.04   -00 38 06.4         00QL251   695  Cd5768      
2001 09  16.33153  23 24 11.93   -00 38 07.2         00QL251   695  Cd5768      
2001 09  18.24345  23 24 02.84   -00 39 07.3         00QL251   695  Cd5768      
2001 09  18.27912  23 24 02.68   -00 39 08.3         00QL251   695  Cd5768      
2002 09  05.294527 23 31 25.60   +00 03 59.8         00QL251   645  C~1Q3A      
2002 09  05.295356 23 31 25.60   +00 03 59.8         00QL251   645  C~1Q3A      
2002 09  05.297842 23 31 25.59   +00 03 59.7         00QL251   645  C~1Q3A      
2003 09  28.273269 23 35 56.67   +00 28 17.1   22.5V 00QL251   645  C~1Q3A      
2003 09  28.274099 23 35 56.67   +00 28 17.1   22.3V 00QL251   645  C~1Q3A      
2003 09  28.276587 23 35 56.65   +00 28 17.1   23.4V 00QL251   645  C~1Q3A      
2005 06  07.41411  23 52 43.43   +02 03 40.6   22.3R 00QL251   304  Cn6460      
2005 06  07.42417  23 52 43.45   +02 03 40.7         00QL251   304  Cn6460      
2006 07  25.44211  23 58 46.90   +02 40 53.7   22.8R 00QL251   250  S~06AN      
2006 07  25.44651  23 58 46.89   +02 40 53.7         00QL251   250  S~06AN      
2006 07  25.45091  23 58 46.88   +02 40 53.6         00QL251   250  S~06AN      
2006 07  25.45531  23 58 46.87   +02 40 53.6         00QL251   250  S~06AN      
2007 07  15.93654  00 05 06.19   +03 16 22.7   23.4R 00QL251   250  S~06AN      
2007 07  15.94418  00 05 06.18   +03 16 22.7         00QL251   250  S~06AN      
2007 07  15.95182  00 05 06.17   +03 16 22.7         00QL251   250  S~06AN      
2007 07  15.95945  00 05 06.16   +03 16 22.7         00QL251   250  S~06AN      
2007 07  19.40459  00 05 01.98   +03 16 06.2         00QL251   250  S~06AN      
2007 07  19.41293  00 05 01.97   +03 16 06.2         00QL251   250  S~06AN      
2007 07  19.42057  00 05 01.96   +03 16 06.1         00QL251   250  S~06AN      
2007 08  05.45807  00 04 26.81   +03 13 04.5         00QL251   250  S~06AN      
2007 08  05.46571  00 04 26.79   +03 13 04.4         00QL251   250  S~06AN      
2007 08  05.51501  00 04 26.65   +03 13 03.7         00QL251   250  S~06AN      
2007 08  05.52265  00 04 26.63   +03 13 03.6         00QL251   250  S~06AN      
2007 08  27.70517  00 03 10.02   +03 05 26.5         00QL251   250  S~06AN      
2007 08  27.71142  00 03 09.99   +03 05 26.4         00QL251   250  S~06AN      
2007 08  27.71906  00 03 09.95   +03 05 26.1         00QL251   250  S~06AN      
2007 08  27.76073  00 03 09.79   +03 05 25.1         00QL251   250  S~06AN      
2007 08  27.76976  00 03 09.75   +03 05 24.9         00QL251   250  S~06AN      
2007 08  27.77948  00 03 09.71   +03 05 24.6         00QL251   250  S~06AN      
2007 08  27.78712  00 03 09.69   +03 05 24.5         00QL251   250  S~06AN      
2007 08  27.82601  00 03 09.48   +03 05 24.3         00QL251   250  S~06AN      
2008 08  25.33585  00 09 23.26   +03 40 36.2         00QL251   250  S~06AN      
2008 08  25.34349  00 09 23.23   +03 40 36.0         00QL251   250  S~06AN      
2008 08  25.35182  00 09 23.20   +03 40 35.8         00QL251   250  S~06AN      
2008 08  25.40321  00 09 23.00   +03 40 34.5         00QL251   250  S~06AN      
2008 10  03.225019 00 06 29.34   +03 21 43.8   22.6V 00QL251   645  C~1Q3A      
2008 10  03.225849 00 06 29.33   +03 21 43.8   22.3V 00QL251   645  C~1Q3A      
2008 10  03.228336 00 06 29.32   +03 21 43.8   23.4V 00QL251   645  C~1Q3A      

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     0.16       0.00     0.20
  2   0.0002      0.00     0.23       0.00     0.18
  3   0.0739      0.00    -0.01       0.00     0.20
  4   0.0741      0.00     0.07       0.00     0.41
  5   0.9830      0.00    -0.11       0.00     0.03
  6   0.9832      0.00    -0.12       0.00     0.17
  7   0.9859      0.00     0.18       0.00     0.12
  8   0.9861      0.00    -0.24       0.00     0.16
  9   0.9886      0.00    -0.07       0.00     0.06
 10   0.9888      0.00     0.06       0.00     0.16
 11   1.0598      0.00     0.36       0.00     0.03
 12   1.0599      0.00     0.39       0.00    -0.04
 13   1.0651      0.00    -0.16       0.00     0.08
 14   1.0652      0.00     0.01       0.00     0.20
 15   2.0290      0.00    -0.19       0.00    -0.68
 16   2.0290      0.00    -0.13       0.00    -0.65
 17   2.0290      0.00    -0.10       0.00    -0.68
 18   3.0912      0.00     0.21       0.00    -0.27
 19   3.0912      0.00     0.27       0.00    -0.25
 20   3.0912      0.00     0.15       0.00    -0.17
 21   4.7836      0.00    -0.18       0.00    -0.29
 22   4.7836      0.00    -0.19       0.00    -0.37
 23   5.9144      0.00     0.33       0.00     0.70
 24   5.9144      0.00     0.32       0.00     0.75
 25   5.9144      0.00     0.30       0.00     0.69
 26   5.9144      0.00     0.29       0.00     0.74
 27   6.8877      0.00    -0.37       0.00     0.26
 28   6.8877      0.00    -0.40       0.00     0.29
 29   6.8877      0.00    -0.42       0.00     0.32
 30   6.8877      0.00    -0.45       0.00     0.35
 31   6.8972      0.00    -0.37       0.00     0.27
 32   6.8972      0.00    -0.35       0.00     0.32
 33   6.8972      0.00    -0.34       0.00     0.26
 34   6.9438      0.00     0.57       0.00    -0.19
 35   6.9439      0.00     0.59       0.00    -0.17
 36   6.9440      0.00     0.51       0.00    -0.12
 37   6.9440      0.00     0.52       0.00    -0.10
 38   7.0047      0.00     0.29       0.00    -0.40
 39   7.0048      0.00     0.22       0.00    -0.35
 40   7.0048      0.00     0.09       0.00    -0.45
 41   7.0049      0.00     0.23       0.00    -0.40
 42   7.0049      0.00     0.18       0.00    -0.37
 43   7.0050      0.00     0.17       0.00    -0.43
 44   7.0050      0.00     0.34       0.00    -0.33
 45   7.0051      0.00    -0.44       0.00     0.45
 46   8.0003      0.00    -0.31       0.00     0.22
 47   8.0003      0.00    -0.31       0.00     0.20
 48   8.0004      0.00    -0.28       0.00     0.20
 49   8.0005      0.00    -0.27       0.00     0.14
 50   8.1068      0.00     0.29       0.00    -0.39
 51   8.1068      0.00     0.19       0.00    -0.36
 52   8.1068      0.00     0.22       0.00    -0.28

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.

00QL251    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        48.138    48.138    48.138
ecceobj         0.221     0.221     0.221
incobj          3.666     3.666     3.666
qmin           36.517    36.517    36.517
qmax           59.765    59.765    59.765
amean          47.797    47.797    47.798
amin           47.262    47.262    47.262
amax           48.415    48.403    48.397
emean           0.208     0.208     0.208
emin            0.179     0.183     0.179
emax            0.235     0.235     0.235
imean           5.831     5.822     5.836
imin            4.560     4.560     4.560
imax            7.096     7.052     7.109
excite_mean     0.232     0.232     0.232
fracstop        1.000     1.000     1.000
cjmean          3.081     3.081     3.081

libcent 0        88.4      88.4      87.5
libamp  0        39.7      39.7      38.8
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       175.9     176.3     175.5
kozaiamp        180.0     180.0     180.0