Orbit Fit and Astrometric record for 16QF86

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: 16QF86    
# Created Fri Dec 15 02:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting    8 observations of    8
# Arc:   0.99y
# First observation: 2016/08/23
#  Last observation: 2017/08/19
Preliminary a, adot, b, bdot, g, gdot:
  -0.000023   0.037622  -0.000003   0.004940   0.037611   0.000000
# Chi-squared of fit:     1.58 DOF:   10 RMS:  0.08
# Min/Max residuals:    -0.18    0.13
# Exact a, adot, b, bdot, g, gdot:
  1.589770E-05  3.744185E-02  1.706790E-06  4.918307E-03  3.778367E-02 -3.241966E-03
# Covariance matrix:
  1.0203E-12  4.7303E-12  1.3378E-14  6.8808E-13  3.3582E-12  1.4820E-10
  4.7303E-12  2.6753E-10 -7.3852E-13  3.1524E-11  7.5375E-11  6.6134E-09
  1.3378E-14 -7.3852E-13  2.8474E-13 -4.2083E-13 -1.2682E-13 -1.7381E-11
  6.8808E-13  3.1524E-11 -4.2083E-13  4.9110E-12  9.1852E-12  7.8577E-10
  3.3582E-12  7.5375E-11 -1.2682E-13  9.1852E-12  2.7093E-11  1.9385E-09
  1.4820E-10  6.6134E-09 -1.7381E-11  7.8577E-10  1.9385E-09  1.6498E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   11.908400  -28.303584    0.020000    0.209120   -0.990837  2457623.752641
# Heliocentric elements and errors
Epoch:              2457620.5000  =  2016/08/20
Mean Anomaly:          199.77301 +/-     1.288
Argument of Peri:      226.46935 +/-     1.307
Long of Asc Node:      274.97337 +/-     0.017
Inclination:            13.65357 +/-     0.002
Eccentricity:         0.31396402 +/-    0.0018
Semi-Major Axis:     21.07003081 +/-    0.0178
Time of Perihelion: 2473343.2805 +/-     124.8
Perihelion:          14.45479920 +/-    0.0396
Aphelion:            27.68526243 +/-    0.0443
Period (y)               96.7177 +/-      0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           23.67948619 +/-    0.0031
Ecliptic Y          -12.77925409 +/-    0.0017
Ecliptic Z            5.46133522 +/-    0.0008
Ecliptic XDOT         0.00102077 +/-    0.0000
Ecliptic YDOT         0.00252562 +/-    0.0000
Ecliptic ZDOT         0.00030021 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   27.45639422 +/-    0.0028
Geocenter to KBO     26.46646040 +/-    0.0036
# Hcoef:  8.47

The following table shows the complete astrometric record for 16QF86. 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 (16QF86) followed by the observatory code and reference code for the source of the astrometry.

2016 08  23.251852 21 57 56.75   +00 16 25.1   22.0z 16QF86    W84  C~2KZO      
2016 09  05.214630 21 56 27.12   +00 08 03.3   22.9r 16QF86    W84  C~2KZO      
2016 09  08.089734 21 56 07.99   +00 06 05.2   22.1i 16QF86    W84  C~2KZO      
2016 09  26.032454 21 54 19.74   -00 06 38.3   22.3r 16QF86    W84  C~2KZO      
2016 09  26.033819 21 54 19.74   -00 06 38.2   21.9i 16QF86    W84  C~2KZO      
2016 09  26.035185 21 54 19.73   -00 06 38.2   22.7g 16QF86    W84  C~2KZO      
2017 08  06.205775 22 07 36.21   +01 26 23.1         16QF86    W84  C~2KZO      
2017 08  19.213692 22 06 06.49   +01 19 55.1         16QF86    W84  C~2KZO      

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    -0.05       0.00     0.07
  2   0.0355  -1435.06    -0.02       0.86    -0.18
  3   0.0434  -1745.21     0.13      -9.26     0.09
  4   0.0925  -3533.83    -0.12    -155.69    -0.09
  5   0.0925  -3533.79     0.04    -155.60     0.02
  6   0.0925  -3533.93     0.02    -155.55     0.09
  7   0.9526   9617.40    -0.02     891.38    -0.03
  8   0.9883   8218.64     0.02     998.32     0.03

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.

16QF86    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        21.088    21.101    21.076
ecceobj         0.312     0.320     0.312
incobj         13.707    13.700    13.708
qmin           14.462    14.291    14.466
qmax           27.854    27.977    27.884
amean          21.210    21.188    21.122
amin           21.088    20.922    20.983
amax           21.606    21.301    21.257
emean           0.302     0.303     0.299
emin            0.282     0.273     0.276
emax            0.315     0.323     0.314
imean          15.606    15.777    15.724
imin           15.208    15.188    15.194
imax           16.719    17.062    16.838
excite_mean     0.404     0.408     0.404
fracstop        0.003     0.004     0.003
cjmean          2.963     2.961     2.966

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       249.4     250.9     250.1
kozaiamp         25.4      26.1      25.1