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 19 01:10:03 2018
# Orbit generated from Bernstein formalism
# Fitting   42 observations of   43
# Arc:   2.35y
# First observation: 2015/08/19
#  Last observation: 2017/12/25
Preliminary a, adot, b, bdot, g, gdot:
  -0.000020   0.026638  -0.000000   0.009708   0.027168   0.000000
# Chi-squared of fit:    28.90 DOF:   78 RMS:  0.15
# Min/Max residuals:    -0.43    0.35
# Exact a, adot, b, bdot, g, gdot:
  1.581908E-05  2.643161E-02  5.998111E-06  9.651255E-03  2.699268E-02 -5.710773E-04
# Covariance matrix:
  8.3553E-14  1.0340E-13  7.0917E-15  3.5247E-14  1.5689E-13  2.2617E-12
  1.0340E-13  1.0286E-12  3.6027E-14  2.9923E-13  1.0252E-12  1.9290E-11
  7.0917E-15  3.6027E-14  6.2556E-14 -3.9935E-14  3.9838E-14  1.2215E-13
  3.5247E-14  2.9923E-13 -3.9935E-14  2.2031E-13  3.1178E-13  9.7618E-12
  1.5689E-13  1.0252E-12  3.9838E-14  3.1178E-13  1.0974E-12  2.0090E-11
  2.2617E-12  1.9290E-11  1.2215E-13  9.7618E-12  2.0090E-11  6.3314E-10
#      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:          304.77176 +/-     0.418
Argument of Peri:       15.66573 +/-     0.514
Long of Asc Node:       72.36370 +/-     0.001
Inclination:            26.59578 +/-     0.001
Eccentricity:         0.05215724 +/-    0.0008
Semi-Major Axis:     38.51261361 +/-    0.0046
Time of Perihelion: 2470642.9999 +/-     101.4
Perihelion:          36.50390187 +/-    0.0309
Aphelion:            40.52132534 +/-    0.0309
Period (y)              239.0081 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.48951016 +/-    0.0012
Ecliptic Y           18.26103355 +/-    0.0007
Ecliptic Z          -11.77770511 +/-    0.0005
Ecliptic XDOT        -0.00122275 +/-    0.0000
Ecliptic YDOT         0.00239424 +/-    0.0000
Ecliptic ZDOT         0.00094660 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.44048496 +/-    0.0010
Geocenter to KBO     37.04707759 +/-    0.0014
# Hcoef:  9.11

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      
2016 10  20.291906 02 27 26.110  -04 37 48.00  24.0i 15QT11    W84  C~2g4R      
2016 10  25.138692 02 27 00.440  -04 39 42.90  24.1r 15QT11    W84  C~2g4R      
2016 10  25.272851 02 26 59.690  -04 39 45.30  24.0i 15QT11    W84  C~2g4R      
2016 11  02.088321 02 26 17.700  -04 42 25.40  24.2r 15QT11    W84  C~2g4R      
2016 11  02.108248 02 26 17.580  -04 42 25.70  24.0i 15QT11    W84  C~2g4R      
2016 11  09.096890 02 25 40.090  -04 44 19.00  24.2r 15QT11    W84  C~2g4R      
2016 11  09.116823 02 25 40.000  -04 44 19.00  24.3i 15QT11    W84  C~2g4R      
2016 11  26.086904 02 24 13.670  -04 46 40.80  25.1g 15QT11    W84  C~2g4R      
2016 11  28.202722 02 24 03.700  -04 46 44.10  24.1r 15QT11    W84  C~2g4R      
2016 12  01.054960 02 23 50.650  -04 46 43.40  24.0i 15QT11    W84  C~2g4R      
2016 12  18.078727 02 22 43.840  -04 44 31.20  24.2r 15QT11    W84  C~2g4R      
2016 12  18.098627 02 22 43.760  -04 44 30.80  23.9i 15QT11    W84  C~2g4R      
2016 12  25.099886 02 22 22.910  -04 42 32.80  23.9i 15QT11    W84  C~2g4R      
2016 12  30.093447 02 22 10.720  -04 40 47.10  24.3r 15QT11    W84  C~2g4R      
2016 12  30.125029 02 22 10.660  -04 40 46.30  23.9i 15QT11    W84  C~2g4R      
2017 01  20.081468 02 21 46.710  -04 30 18.30  24.1r 15QT11    W84  C~2g4R      
2017 12  25.065580 02 27 22.310  -03 40 34.50  24.5r 15QT11    W84  C~2g4R      
2017 12  25.078033 02 27 22.260  -03 40 34.20  24.3g 15QT11    W84  C~2g4R      

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    -0.07       0.00    -0.07
  2   0.0000      0.00     0.05       0.00     0.04
  3   0.0000     -0.38    -0.20      -0.18    -0.04
  4   0.0001     -0.80    -0.14      -0.46     0.10
  5   0.0001     -0.90    -0.01      -0.74     0.01
  6   0.0109   -105.98     0.09     -85.90    -0.03
  7   0.0109   -106.15     0.07     -85.94     0.03
  8   0.0109   -106.39    -0.02     -86.18    -0.09
  9   0.0109   -106.78    -0.25     -86.36    -0.17
 10   0.0110   -106.98     0.00     -86.50    -0.00
 11   0.0110   -107.23    -0.10     -86.73    -0.14
 12   0.0110   -107.33    -0.07     -86.58     0.10
 13   0.0110   -107.54    -0.14     -86.72     0.05
 14   0.0681  -1022.09     0.12    -469.12     0.03
 15   0.0681  -1022.44     0.06    -469.20     0.01
 16   0.0682  -1024.64     0.19    -469.59     0.21
 17   0.0817  -1320.18     0.28    -538.92    -0.22
 18   0.0817  -1320.46     0.28    -538.82    -0.06
 19   0.0818  -1322.21     0.21    -539.25    -0.17
 20   0.0818  -1322.87     0.35    -539.34    -0.09
 21   0.0928  -1581.82    -0.43    -587.58     0.01
 22   0.0928  -1582.20     0.29    -587.77     0.01
 23   0.1586  -3389.94     0.04    -720.27     0.19
 24   0.1586  -3390.39    -0.21    -720.65    -0.18
 25   0.1586  -3390.71    -0.20    -720.21     0.25
 26   1.1716   1747.97    -0.18    1308.33     0.05
 27   1.1849   1347.89    -0.11    1329.71    -0.15
 28   1.1853   1336.53 (  -0.21)   1331.24 (   0.54)
 29   1.2067    691.54     0.03    1392.29     0.01
 30   1.2067    689.75    -0.10    1392.61     0.12
 31   1.2259    123.91    -0.20    1474.87     0.04
 32   1.2259    122.64     0.14    1475.33     0.21
 33   1.2724  -1140.28     0.08    1776.41    -0.04
 34   1.2782  -1281.74     0.19    1823.45    -0.04
 35   1.2860  -1465.23     0.09    1889.74    -0.06
 36   1.3326  -2361.51    -0.08    2350.08    -0.14
 37   1.3326  -2362.50    -0.22    2350.86     0.03
 38   1.3518  -2616.51     0.16    2566.76     0.19
 39   1.3655  -2752.72    -0.15    2727.57     0.07
 40   1.3656  -2753.30     0.04    2728.63     0.08
 41   1.4229  -2879.89    -0.09    3440.64     0.09
 42   2.3510   2854.10     0.18    4560.48    -0.21
 43   2.3511   2853.50     0.02    4561.02    -0.06

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        38.878    38.885    38.870
ecceobj         0.055     0.055     0.054
incobj         26.566    26.568    26.565
qmin           35.781    35.710    35.922
qmax           41.660    41.753    41.467
amean          38.634    38.653    38.624
amin           38.350    38.356    38.341
amax           38.939    38.984    38.924
emean           0.055     0.057     0.054
emin            0.043     0.044     0.042
emax            0.070     0.073     0.067
imean          24.905    24.903    24.907
imin           24.263    24.244    24.264
imax           25.546    25.532    25.539
excite_mean     0.425     0.425     0.425
fracstop        1.000     1.000     1.000
cjmean          2.831     2.831     2.831

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       174.9     174.8     177.4
kozaiamp        179.9     180.0     180.0