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 Fri Oct 20 01:38:39 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  5.974733E-06  9.669805E-03  2.700506E-02 -9.660802E-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:          302.34041 +/-    18.661
Argument of Peri:       19.71401 +/-    24.932
Long of Asc Node:       72.36426 +/-     0.071
Inclination:            26.59509 +/-     0.033
Eccentricity:         0.06638906 +/-    0.0502
Semi-Major Axis:     38.66922126 +/-    0.1342
Time of Perihelion: 2471317.9565 +/-    4552.3
Perihelion:          36.10200782 +/-    1.9452
Aphelion:            41.23643469 +/-    1.9465
Period (y)              240.4675 +/-      1.25
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.47592557 +/-    0.0174
Ecliptic Y           18.25238735 +/-    0.0110
Ecliptic Z          -11.77230667 +/-    0.0069
Ecliptic XDOT        -0.00125728 +/-    0.0001
Ecliptic YDOT         0.00237869 +/-    0.0001
Ecliptic ZDOT         0.00096068 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   37.42350715 +/-    0.0153
Geocenter to KBO     37.03009405 +/-    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           35.325    35.001    34.730
qmax           42.439    45.064    42.560
amean          38.774    39.880    38.573
amin           38.461    39.537    38.277
amax           39.095    40.234    38.886
emean           0.070     0.100     0.080
emin            0.057     0.081     0.065
emax            0.086     0.120     0.096
imean          24.905    24.916    24.917
imin           24.267    24.344    24.217
imax           25.517    25.496    25.616
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       175.9     178.9     178.2
kozaiamp        180.0     180.0     180.0