Orbit Fit and Astrometric record for 16QL134

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: 16QL134   
# Created Tue Apr  1 01:10:50 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting      9 observations of      9
# Arc:   5.13y
# First observation: 2013/10/11
#  Last observation: 2018/11/29
# Chi-squared of fit:     2.65 DOF:     12 RMS:  0.10
# Min/Max residuals:    -0.24    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.555545E-05  2.351784E-02 -1.049727E-06 -1.324483E-03  2.409679E-02 -8.236029E-04
# Covariance matrix:
  1.2208E-12 -8.5894E-13 -2.5026E-14  3.5072E-14 -3.4667E-13 -5.7096E-12
 -8.5894E-13  1.1045E-12  3.7893E-14 -5.3042E-14  1.2694E-13  9.2337E-12
 -2.5026E-14  3.7893E-14  7.1913E-13 -2.0367E-13  7.4280E-15  3.3748E-13
  3.5072E-14 -5.3042E-14 -2.0367E-13  7.6031E-14 -1.0527E-14 -4.7232E-13
 -3.4667E-13  1.2694E-13  7.4280E-15 -1.0527E-14  8.5493E-13  5.8233E-13
 -5.7096E-12  9.2337E-12  3.3748E-13 -4.7232E-13  5.8233E-13  8.3049E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -8.505078   14.301966   -0.060130   -0.147217   -0.985289  2456576.748258
# Heliocentric elements and errors
Epoch:              2456576.5000  =  2013/10/11
Mean Anomaly:          311.81917 +/-     0.339
Argument of Peri:      301.29043 +/-     0.389
Long of Asc Node:      125.66656 +/-     0.004
Inclination:             8.90473 +/-     0.000
Eccentricity:         0.04679999 +/-    0.0003
Semi-Major Axis:     43.79588154 +/-    0.0071
Time of Perihelion: 2470744.8759 +/-     102.2
Perihelion:          41.74623478 +/-    0.0138
Aphelion:            45.84552830 +/-    0.0141
Period (y)              289.8399 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.72074564 +/-    0.0015
Ecliptic Y           10.44634922 +/-    0.0004
Ecliptic Z           -6.13771091 +/-    0.0002
Ecliptic XDOT        -0.00077750 +/-    0.0000
Ecliptic YDOT         0.00255947 +/-    0.0000
Ecliptic ZDOT        -0.00013485 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.48504195 +/-    0.0015
Geocenter to KBO     41.49936978 +/-    0.0016
# Hcoef:  7.43

The following table shows the complete astrometric record for 16QL134. 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 (16QL134) followed by the observatory code and reference code for the source of the astrometry.

2013 10  11.24748  01 05 48.241  -02 12 25.17  23.7r 16QL134   W84  C~52ZY      
2014 10  03.31013  01 11 30.158  -01 41 32.08  23.7i 16QL134   W84  C~52ZY      
2015 09  04.27832  01 18 29.908  -01 00 02.56  22.8z 16QL134   W84  C~52ZY      
2016 08  25.40953  01 24 00.398  -00 28 54.66  23.4i 16QL134   W84  C~52ZY      
2016 10  10.18355  01 21 09.070  -00 50 51.99  23.5i 16QL134   W84  C~52ZY      
2016 10  23.22603  01 20 10.867  -00 56 36.83  23.9r 16QL134   W84  C~52ZY      
2017 08  28.38062  01 28 57.338  -00 03 04.98  23.4i 16QL134   W84  C~52ZY      
2017 09  24.25475  01 27 24.854  -00 15 50.90  23.7r 16QL134   W84  C~52ZY      
2018 11  29.10663  01 28 00.126  -00 12 53.20  23.7r 16QL134   W84  C~52ZY      

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    -0.04       0.00     0.02
     2   0.9776      0.00     0.08       0.00    -0.08
     3   1.8974      0.00     0.01       0.00     0.02
     4   2.8724      0.00     0.09       0.00    -0.08
     5   2.9978      0.00    -0.03       0.00    -0.04
     6   3.0335      0.00    -0.03       0.00     0.15
     7   3.8799      0.00     0.10       0.00     0.10
     8   3.9535      0.00    -0.24       0.00     0.03
     9   5.1331      0.00     0.11       0.00    -0.10

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.

16QL134    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.049    44.049    44.049
ecceobj         0.049     0.049     0.049
incobj          8.897     8.897     8.897
qmin           40.631    40.636    40.625
qmax           47.199    47.174    47.154
amean          43.779    43.779    43.779
amin           43.432    43.428    43.439
amax           44.132    44.140    44.138
emean           0.052     0.052     0.052
emin            0.037     0.037     0.037
emax            0.069     0.069     0.069
imean           7.574     7.574     7.574
imin            6.971     6.971     6.971
imax            8.253     8.250     8.249
excite_mean     0.142     0.142     0.142
fracstop        1.000     1.000     1.000
cjmean          3.075     3.075     3.075

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       179.7     179.7     179.7
kozaiamp        180.0     180.0     180.0