Orbit Fit and Astrometric record for 16QW134

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: 16QW134   
# Created Fri Dec  3 02:13:51 2021
# Orbit generated from Bernstein formalism
# Fitting      7 observations of      7
# Arc:   2.23y
# First observation: 2016/08/16
#  Last observation: 2018/11/07
Preliminary a, adot, b, bdot, g, gdot:
   0.000009   0.025280  -0.000002   0.008722   0.025953   0.000000
# Chi-squared of fit:     3.01 DOF:      8 RMS:  0.12
# Min/Max residuals:    -0.24    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.547731E-05  2.504128E-02  4.764710E-06  8.647698E-03  2.571810E-02 -1.184395E-04
# Covariance matrix:
  5.6756E-13  1.6797E-13  1.0011E-14  7.8233E-14  5.7201E-13  4.3423E-12
  1.6797E-13  2.3489E-12 -5.5886E-14  8.7713E-13  1.9860E-12  5.3787E-11
  1.0011E-14 -5.5886E-14  3.7846E-13 -2.7082E-13 -2.1763E-14 -2.5960E-12
  7.8233E-14  8.7713E-13 -2.7082E-13  7.7300E-13  7.1108E-13  2.8222E-11
  5.7201E-13  1.9860E-12 -2.1763E-14  7.1108E-13  2.2300E-12  4.2890E-11
  4.3423E-12  5.3787E-11 -2.5960E-12  2.8222E-11  4.2890E-11  1.7548E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
  -13.488841   20.026274    0.841145   -0.131803   -0.550208  2457616.871239
# Heliocentric elements and errors
Epoch:              2457610.5000  =  2016/08/10
Mean Anomaly:          337.88030 +/-     1.287
Argument of Peri:      348.63802 +/-     1.470
Long of Asc Node:       52.79313 +/-     0.002
Inclination:            22.89504 +/-     0.001
Eccentricity:         0.05999729 +/-    0.0007
Semi-Major Axis:     41.73506220 +/-    0.0065
Time of Perihelion: 2463661.4932 +/-     352.1
Perihelion:          39.23107160 +/-    0.0283
Aphelion:            44.23905280 +/-    0.0284
Period (y)              269.6248 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.34013456 +/-    0.0021
Ecliptic Y           12.34930467 +/-    0.0007
Ecliptic Z           -9.06954918 +/-    0.0005
Ecliptic XDOT        -0.00072123 +/-    0.0000
Ecliptic YDOT         0.00256697 +/-    0.0000
Ecliptic ZDOT         0.00089812 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.43814686 +/-    0.0019
Geocenter to KBO     38.88311607 +/-    0.0023
# Hcoef:  7.52

The following table shows the complete astrometric record for 16QW134. 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 (16QW134) followed by the observatory code and reference code for the source of the astrometry.

2016 08  16.37045  01 34 13.372  -04 40 38.88  23.2i 16QW134   W84  C~55Zc      
2016 08  26.35332  01 33 49.687  -04 45 05.53  23.5r 16QW134   W84  C~55Zc      
2016 08  30.33861  01 33 38.008  -04 46 58.42  24.2g 16QW134   W84  C~55Zc      
2016 11  07.14146  01 28 28.544  -05 15 31.48  22.5z 16QW134   W84  C~55Zc      
2017 11  15.15979  01 32 30.961  -04 16 43.85  23.9r 16QW134   W84  C~55Zc      
2017 11  19.15300  01 32 14.055  -04 17 12.50  23.7r 16QW134   W84  C~55Zc      
2018 11  07.20873  01 37 45.078  -03 14 49.53  23.3r 16QW134   W84  C~55Zc      

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    -0.02       0.00     0.11
     2   0.0273   -428.22     0.08    -114.46    -0.06
     3   0.0382   -632.38    -0.09    -153.68    -0.06
     4   0.2266  -5562.99     0.03     -13.61    -0.04
     5   1.2479   -882.22     0.23    1904.39    -0.08
     6   1.2588  -1127.46    -0.24    1972.51     0.18
     7   2.2254   4871.06     0.01    3584.02    -0.05

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.

16QW134    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        42.202    42.220    42.183
ecceobj         0.069     0.069     0.069
incobj         22.825    22.826    22.825
qmin           38.423    38.463    38.416
qmax           45.659    45.701    45.623
amean          41.950    41.970    41.933
amin           41.636    41.637    41.604
amax           42.295    42.317    42.270
emean           0.067     0.063     0.067
emin            0.054     0.049     0.055
emax            0.081     0.081     0.080
imean          21.615    21.650    21.613
imin           21.188    21.205    21.200
imax           22.073    22.114    22.072
excite_mean     0.374     0.374     0.374
fracstop        1.000     1.000     1.000
cjmean          2.908     2.908     2.908

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       174.4     176.9     174.8
kozaiamp        180.0     180.0     180.0