Orbit Fit and Astrometric record for 16QB135

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: 16QB135   
# Created Sat Dec  4 02:13:53 2021
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:   2.20y
# First observation: 2016/08/26
#  Last observation: 2018/11/08
Preliminary a, adot, b, bdot, g, gdot:
   0.000041   0.027126  -0.000008  -0.007136   0.028410   0.000000
# Chi-squared of fit:     1.89 DOF:     14 RMS:  0.08
# Min/Max residuals:    -0.12    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.571973E-05  2.699651E-02 -4.027722E-06 -7.122109E-03  2.818683E-02 -1.036908E-03
# Covariance matrix:
  6.8811E-13  6.6342E-14 -2.2858E-14  7.2325E-14  1.1536E-12 -4.3864E-12
  6.6342E-14  3.2799E-12  1.9588E-13 -8.5172E-13  3.7475E-12  5.4299E-11
 -2.2858E-14  1.9588E-13  4.2680E-13 -3.1718E-13  1.0770E-13  5.1083E-12
  7.2325E-14 -8.5172E-13 -3.1718E-13  5.4815E-13 -5.5279E-13 -2.1161E-11
  1.1536E-12  3.7475E-12  1.0770E-13 -5.5279E-13  7.0259E-12  3.5942E-11
 -4.3864E-12  5.4299E-11  5.1083E-12 -2.1161E-11  3.5942E-11  1.3403E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.751978    2.838820    0.497419    0.042499   -0.880806  2457626.710029
# Heliocentric elements and errors
Epoch:              2457620.5000  =  2016/08/20
Mean Anomaly:          209.22008 +/-     0.555
Argument of Peri:      325.88446 +/-     0.550
Long of Asc Node:      192.10985 +/-     0.001
Inclination:            15.02901 +/-     0.001
Eccentricity:         0.11125548 +/-    0.0005
Semi-Major Axis:     33.06362213 +/-    0.0089
Time of Perihelion: 2486705.2325 +/-     106.4
Perihelion:          29.38511293 +/-    0.0194
Aphelion:            36.74213133 +/-    0.0203
Period (y)              190.1226 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.29487009 +/-    0.0033
Ecliptic Y            1.29940944 +/-    0.0002
Ecliptic Z            1.70322895 +/-    0.0002
Ecliptic XDOT        -0.00019563 +/-    0.0000
Ecliptic YDOT         0.00260872 +/-    0.0000
Ecliptic ZDOT        -0.00069585 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.35803967 +/-    0.0033
Geocenter to KBO     35.47756280 +/-    0.0033
# Hcoef:  7.97

The following table shows the complete astrometric record for 16QB135. 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 (16QB135) followed by the observatory code and reference code for the source of the astrometry.

2016 08  26.20924  00 06 02.277  +03 39 13.86  23.2r 16QB135   W84  C~55Zd      
2016 09  11.23873  00 04 47.403  +03 30 26.77  23.4i 16QB135   W84  C~55Zd      
2016 09  22.12861  00 03 52.642  +03 23 50.43  23.7r 16QB135   W84  C~55Zd      
2017 09  27.16767  00 09 49.365  +03 35 16.21  23.0z 16QB135   W84  C~55Zd      
2017 09  27.17592  00 09 49.328  +03 35 15.88  23.7r 16QB135   W84  C~55Zd      
2017 09  27.17729  00 09 49.322  +03 35 15.86  23.5i 16QB135   W84  C~55Zd      
2017 10  22.17884  00 07 47.734  +03 19 50.17  23.3r 16QB135   W84  C~55Zd      
2018 10  18.15718  00 14 28.845  +03 36 42.14  23.0z 16QB135   W84  C~55Zd      
2018 10  28.17383  00 13 43.975  +03 30 51.27  22.9i 16QB135   W84  C~55Zd      
2018 11  08.13461  00 13 01.404  +03 25 04.15  24.1r 16QB135   W84  C~55Zd      

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    -0.12       0.00     0.01
     2   0.0439  -1238.12     0.19     -37.08     0.00
     3   0.0737  -2148.13    -0.05     -73.83     0.09
     4   1.0868   3025.01    -0.06   -1569.91    -0.03
     5   1.0868   3024.37     0.02   -1569.99    -0.08
     6   1.0868   3024.28     0.04   -1569.98    -0.06
     7   1.1553    985.58    -0.05   -1695.88    -0.01
     8   2.1436   6902.84     0.03   -3151.41     0.06
     9   2.1710   6146.22    -0.01   -3207.39    -0.11
    10   2.2010   5422.81    -0.00   -3273.39     0.14

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.

16QB135    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        33.306    33.330    33.282
ecceobj         0.104     0.104     0.104
incobj         14.949    14.950    14.947
qmin           29.396    28.757    28.710
qmax           37.765    36.885    37.319
amean          33.142    32.319    32.802
amin           32.832    31.555    31.706
amax           33.738    33.330    33.430
emean           0.106     0.094     0.104
emin            0.096     0.083     0.093
emax            0.124     0.110     0.116
imean          14.894    15.007    14.896
imin           14.683    14.883    14.767
imax           14.971    15.125    14.975
excite_mean     0.278     0.276     0.277
fracstop        0.001     0.002     0.002
cjmean          2.931     2.931     2.931

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       323.9     315.3     321.5
kozaiamp          4.6      10.2      10.1