Orbit Fit and Astrometric record for 15QT11

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: 15QT11    
# Created Sun Dec 17 02:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   25
# Arc:  57.94d
# First observation: 2015/08/19
#  Last observation: 2015/10/16
Preliminary a, adot, b, bdot, g, gdot:
   0.000001   0.028390   0.000008   0.010217   0.027722   0.000000
# Chi-squared of fit:    14.99 DOF:   44 RMS:  0.14
# Min/Max residuals:    -0.57    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.536613E-05  2.649686E-02  5.974727E-06  9.669805E-03  2.700506E-02 -9.661390E-04
# Covariance matrix:
  1.4238E-13 -5.3899E-12 -5.9655E-15 -1.1396E-12 -7.7976E-13  4.8488E-11
 -5.3899E-12  2.9985E-09  1.0149E-11  8.3199E-10  8.4905E-10  6.8161E-08
 -5.9655E-15  1.0149E-11  1.5102E-13  1.7864E-12  3.0653E-12  2.8827E-10
 -1.1396E-12  8.3199E-10  1.7864E-12  2.5366E-10  2.3854E-10  1.9469E-08
 -7.7976E-13  8.4905E-10  3.0653E-12  2.3854E-10  2.5093E-10  2.2319E-08
  4.8488E-11  6.8161E-08  2.8827E-10  1.9469E-08  2.2319E-08  2.5024E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
  -18.537016   32.414949    0.930117   -0.128862   -0.384824  2457253.855106
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:          302.33973 +/-    18.660
Argument of Peri:       19.71494 +/-    24.930
Long of Asc Node:       72.36426 +/-     0.071
Inclination:            26.59509 +/-     0.033
Eccentricity:         0.06639093 +/-    0.0502
Semi-Major Axis:     38.66922563 +/-    0.1342
Time of Perihelion: 2471318.1259 +/-    4552.0
Perihelion:          36.10193976 +/-    1.9453
Aphelion:            41.23651150 +/-    1.9465
Period (y)              240.4675 +/-      1.25
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.47592615 +/-    0.0174
Ecliptic Y           18.25238772 +/-    0.0110
Ecliptic Z          -11.77230690 +/-    0.0069
Ecliptic XDOT        -0.00125729 +/-    0.0001
Ecliptic YDOT         0.00237869 +/-    0.0001
Ecliptic ZDOT         0.00096069 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   37.42350787 +/-    0.0153
Geocenter to KBO     37.03009477 +/-    0.0217
# Hcoef:  9.20

The following table shows the complete astrometric record for 15QT11. 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 (15QT11) followed by the observatory code and reference code for the source of the astrometry.

2015 08  19.354317 02 26 05.55   -05 08 09.3   24.5r 15QT11    W84  C~1l4o      
2015 08  19.359282 02 26 05.55   -05 08 09.3   24.4r 15QT11    W84  C~1l4o      
2015 08  19.364248 02 26 05.53   -05 08 09.6   24.7r 15QT11    W84  C~1l4o      
2015 08  19.383565 02 26 05.51   -05 08 10.0   23.9i 15QT11    W84  C~1l4o      
2015 08  19.392546 02 26 05.51   -05 08 10.3   24.3i 15QT11    W84  C~1l4p      
2015 08  23.329178 02 26 00.81   -05 10 05.9   25.5g 15QT11    W84  C~1l4p      
2015 08  23.334178 02 26 00.80   -05 10 06.0   24.2r 15QT11    W84  C~1l4p      
2015 08  23.339132 02 26 00.79   -05 10 06.3   24.7r 15QT11    W84  C~1l4p      
2015 08  23.344086 02 26 00.77   -05 10 06.6   24.5r 15QT11    W84  C~1l4p      
2015 08  23.359016 02 26 00.76   -05 10 06.8   24.3i 15QT11    W84  C~1l4p      
2015 08  23.363507 02 26 00.75   -05 10 07.1   24.2i 15QT11    W84  C~1l4p      
2015 08  23.367998 02 26 00.74   -05 10 07.0   25.2i 15QT11    W84  C~1l4p      
2015 08  23.372488 02 26 00.73   -05 10 07.2   24.9i 15QT11    W84  C~1l4p      
2015 09  13.219016 02 25 11.71   -05 21 15.4   24.4r 15QT11    W84  C~1l4p      
2015 09  13.223993 02 25 11.69   -05 21 15.6   24.8r 15QT11    W84  C~1l4p      
2015 09  13.264039 02 25 11.56   -05 21 16.7   25.0g 15QT11    W84  C~1l4p      
2015 09  18.204931 02 24 54.49   -05 24 01.5   24.4i 15QT11    W84  C~1l4p      
2015 09  18.209433 02 24 54.47   -05 24 01.5   24.7i 15QT11    W84  C~1l4p      
2015 09  18.235752 02 24 54.37   -05 24 02.5   24.2z 15QT11    W84  C~1l4p      
2015 09  18.248218 02 24 54.33   -05 24 02.8   23.6z 15QT11    W84  C~1l4p      
2015 09  22.249398 02 24 39.09   -05 26 15.4   24.5r 15QT11    W84  C~1l4p      
2015 09  22.265741 02 24 39.07   -05 26 15.7   23.9i 15QT11    W84  C~1l4p      
2015 10  16.283194 02 22 48.04   -05 38 28.2   24.2r 15QT11    W84  C~1l4p      
2015 10  16.285544 02 22 48.02   -05 38 28.7   23.6i 15QT11    W84  C~1l4p      
2015 10  16.289514 02 22 47.99   -05 38 28.4   23.3z 15QT11    W84  C~1l4p      

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     0.03       0.00    -0.06
  2   0.0000      0.00     0.15       0.00     0.04
  3   0.0000     -0.38    -0.10      -0.18    -0.03
  4   0.0001     -0.80    -0.04      -0.46     0.11
  5   0.0001     -0.90     0.09      -0.74     0.02
  6   0.0109   -105.98     0.12     -85.90    -0.01
  7   0.0109   -106.15     0.10     -85.94     0.05
  8   0.0109   -106.39     0.01     -86.18    -0.08
  9   0.0109   -106.78    -0.22     -86.36    -0.16
 10   0.0110   -106.98     0.03     -86.50     0.01
 11   0.0110   -107.23    -0.07     -86.73    -0.12
 12   0.0110   -107.33    -0.04     -86.58     0.11
 13   0.0110   -107.54    -0.11     -86.72     0.07
 14   0.0681  -1022.09    -0.03    -469.12     0.06
 15   0.0681  -1022.44    -0.09    -469.20     0.05
 16   0.0682  -1024.64     0.04    -469.59     0.25
 17   0.0817  -1320.18     0.13    -538.92    -0.18
 18   0.0817  -1320.46     0.13    -538.82    -0.03
 19   0.0818  -1322.21     0.07    -539.25    -0.13
 20   0.0818  -1322.87     0.20    -539.34    -0.06
 21   0.0928  -1581.82    -0.57    -587.58     0.04
 22   0.0928  -1582.20     0.16    -587.77     0.04
 23   0.1586  -3389.94     0.17    -720.27     0.11
 24   0.1586  -3390.39    -0.08    -720.65    -0.26
 25   0.1586  -3390.71    -0.07    -720.21     0.17

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.

15QT11    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        39.036    40.174    38.816
ecceobj         0.068     0.114     0.080
incobj         26.565    26.468    26.592
qmin           35.375    35.054    34.797
qmax           42.466    44.933    42.672
amean          38.781    39.875    38.581
amin           38.477    39.526    38.283
amax           39.108    40.238    38.900
emean           0.071     0.100     0.080
emin            0.057     0.083     0.066
emax            0.086     0.119     0.097
imean          24.903    24.911    24.922
imin           24.266    24.337    24.220
imax           25.535    25.492    25.613
excite_mean     0.427     0.433     0.429
fracstop        1.000     1.000     1.000
cjmean          2.830     2.833     2.827

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       179.2     178.8     178.4
kozaiamp        179.9     179.9     180.0