Orbit Fit and Astrometric record for 16QZ134

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: 16QZ134   
# Created Sat Dec  4 02:13:53 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     12 observations of     12
# Arc:   5.19y
# First observation: 2016/08/26
#  Last observation: 2021/11/05
# Chi-squared of fit:    11.84 DOF:     18 RMS:  0.18
# Min/Max residuals:    -0.41    0.62
# Exact a, adot, b, bdot, g, gdot:
  1.396882E-05  2.246061E-02  6.180129E-06  8.431944E-03  2.449787E-02 -2.712015E-03
# Covariance matrix:
  6.1922E-13 -4.5644E-13  1.3989E-13 -2.0020E-13  1.4902E-13 -4.0606E-12
 -4.5644E-13  7.2621E-13 -2.1121E-13  3.0306E-13  4.0032E-13  6.1523E-12
  1.3989E-13 -2.1121E-13  3.7056E-13 -1.7646E-13 -4.1946E-14 -2.0272E-12
 -2.0020E-13  3.0306E-13 -1.7646E-13  1.7780E-13  6.2002E-14  2.9055E-12
  1.4902E-13  4.0032E-13 -4.1946E-14  6.2002E-14  1.4724E-12  1.2702E-12
 -4.0606E-12  6.1523E-12 -2.0272E-12  2.9055E-12  1.2702E-12  5.8961E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.000116   -0.153164    0.450777   -0.047288   -0.905327  2457626.705879
# Heliocentric elements and errors
Epoch:              2457626.5000  =  2016/08/26
Mean Anomaly:          287.02404 +/-     0.045
Argument of Peri:       78.73654 +/-     0.070
Long of Asc Node:        6.96754 +/-     0.000
Inclination:            20.82950 +/-     0.000
Eccentricity:         0.12359094 +/-    0.0003
Semi-Major Axis:     42.64397850 +/-    0.0079
Time of Perihelion: 2478245.2505 +/-      25.9
Perihelion:          37.37356892 +/-    0.0152
Aphelion:            47.91438809 +/-    0.0162
Period (y)              278.4805 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           41.66550490 +/-    0.0020
Ecliptic Y           -0.56466522 +/-    0.0000
Ecliptic Z           -2.13617664 +/-    0.0001
Ecliptic XDOT        -0.00024510 +/-    0.0000
Ecliptic YDOT         0.00250388 +/-    0.0000
Ecliptic ZDOT         0.00095689 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.72412755 +/-    0.0020
Geocenter to KBO     40.81998288 +/-    0.0020
# Hcoef:  7.42

The following table shows the complete astrometric record for 16QZ134. 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 (16QZ134) followed by the observatory code and reference code for the source of the astrometry.

2016 08  26.20509  00 04 12.919  -02 48 47.76  24.4r 16QZ134   W84  C~55Zc      
2016 09  11.23049  00 03 03.583  -02 55 19.40  23.3i 16QZ134   W84  C~55Zc      
2017 08  18.31188  00 08 41.008  -01 48 25.22  24.6g 16QZ134   W84  C~55Zc      
2017 09  18.22777  00 06 30.185  -02 00 36.94  23.8r 16QZ134   W84  C~55Zc      
2017 09  27.16491  00 05 48.432  -02 04 21.56  23.1z 16QZ134   W84  C~55Zc      
2017 10  19.15880  00 04 09.494  -02 12 45.21  21.6i 16QZ134   W84  C~55Zc      
2017 11  09.06430  00 02 52.961  -02 18 24.46  23.6r 16QZ134   W84  C~55Zc      
2018 09  14.31375  00 10 48.397  -01 00 55.20  23.7r 16QZ134   W84  C~55Zc      
2018 09  14.31513  00 10 48.373  -01 00 55.21  23.0i 16QZ134   W84  C~55Zc      
2021 11  05.097860 00 19 04.458  +01 35 02.69  23.7G 16QZ134   G37  C~5Bct      
2021 11  05.147550 00 19 04.283  +01 35 01.90        16QZ134   G37  C~5Bct      
2021 11  05.196200 00 19 04.106  +01 35 01.02        16QZ134   G37  C~5Bct      

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     0.16       0.00    -0.10
     2   0.0439      0.00    -0.07       0.00    -0.02
     3   0.9777      0.00    -0.01       0.00     0.01
     4   1.0623      0.00    -0.07       0.00    -0.10
     5   1.0868      0.00     0.17       0.00     0.06
     6   1.1470      0.00    -0.13       0.00     0.62
     7   1.2043      0.00     0.05       0.00    -0.41
     8   2.0509      0.00     0.08       0.00    -0.02
     9   2.0510      0.00    -0.18       0.00     0.01
    10   5.1934      0.00    -0.08       0.00    -0.05
    11   5.1935      0.00     0.03       0.00     0.02
    12   5.1937      0.00     0.06       0.00    -0.01

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.

16QZ134    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.049    43.049    43.049
ecceobj         0.126     0.126     0.126
incobj         20.722    20.722    20.722
qmin           36.884    36.913    36.933
qmax           49.195    49.219    49.094
amean          42.888    42.888    42.887
amin           42.529    42.527    42.538
amax           43.280    43.279    43.287
emean           0.120     0.120     0.121
emin            0.106     0.107     0.106
emax            0.137     0.137     0.136
imean          20.885    20.885    20.881
imin           20.390    20.387    20.396
imax           21.358    21.373    21.361
excite_mean     0.376     0.376     0.376
fracstop        1.000     1.000     1.000
cjmean          2.916     2.916     2.916

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       181.0     179.0     177.7
kozaiamp        180.0     180.0     179.9