Orbit Fit and Astrometric record for 16QF135

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: 16QF135   
# Created Sat Dec  4 02:13:53 2021
# Orbit generated from Bernstein formalism
# Fitting     15 observations of     15
# Arc:   4.95y
# First observation: 2013/11/05
#  Last observation: 2018/10/19
Preliminary a, adot, b, bdot, g, gdot:
  -0.000280   0.030221  -0.000088   0.012135   0.028170   0.000000
# Chi-squared of fit:     2.17 DOF:     24 RMS:  0.07
# Min/Max residuals:    -0.20    0.14
# Exact a, adot, b, bdot, g, gdot:
  1.675277E-05  2.979518E-02  7.211772E-06  1.197551E-02  2.781748E-02 -1.878698E-03
# Covariance matrix:
  4.8528E-13 -2.1040E-13  1.1610E-14 -3.9953E-14 -1.0581E-13 -7.4294E-13
 -2.1040E-13  4.0277E-13 -3.9730E-14  1.4273E-13  1.3116E-13  2.6593E-12
  1.1610E-14 -3.9730E-14  4.5084E-13 -1.2604E-13 -1.9132E-14 -2.8866E-13
 -3.9953E-14  1.4273E-13 -1.2604E-13  9.0345E-14  5.8176E-14  1.0338E-12
 -1.0581E-13  1.3116E-13 -1.9132E-14  5.8176E-14  4.6879E-13  1.0753E-12
 -7.4294E-13  2.6593E-12 -2.8866E-13  1.0338E-12  1.0753E-12  1.9259E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -17.407375   12.216336   -0.498407   -0.255938   -0.816737  2456601.516448
# Heliocentric elements and errors
Epoch:              2456600.5000  =  2013/11/04
Mean Anomaly:          352.37797 +/-     0.023
Argument of Peri:      333.94195 +/-     0.039
Long of Asc Node:       48.77805 +/-     0.000
Inclination:            27.63507 +/-     0.000
Eccentricity:         0.24883870 +/-    0.0001
Semi-Major Axis:     48.69898636 +/-    0.0068
Time of Perihelion: 2459228.6261 +/-       7.8
Perihelion:          36.58079392 +/-    0.0068
Aphelion:            60.81717880 +/-    0.0096
Period (y)              339.8506 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.25585544 +/-    0.0008
Ecliptic Y            7.92970269 +/-    0.0002
Ecliptic Z          -10.75431071 +/-    0.0003
Ecliptic XDOT        -0.00045451 +/-    0.0000
Ecliptic YDOT         0.00290170 +/-    0.0000
Ecliptic ZDOT         0.00118013 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.76953923 +/-    0.0008
Geocenter to KBO     35.94862578 +/-    0.0009
# Hcoef:  6.98

The following table shows the complete astrometric record for 16QF135. 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 (16QF135) followed by the observatory code and reference code for the source of the astrometry.

2013 11  05.01567  01 12 16.44   -11 11 44.6   22.9r 16QF135   W84  C~55Zd      
2013 11  05.05474  01 12 16.24   -11 11 44.8         16QF135   W84  C~55Zd      
2013 11  05.14797  01 12 15.78   -11 11 45.4         16QF135   W84  C~55Zd      
2016 08  16.36770  01 33 57.488  -06 39 40.24  22.0i 16QF135   W84  C~55Zd      
2016 08  29.34394  01 33 22.821  -06 45 58.00  23.2g 16QF135   W84  C~55Zd      
2017 09  25.35779  01 36 42.601  -05 39 28.26  22.2i 16QF135   W84  C~55Zd      
2017 09  25.35916  01 36 42.591  -05 39 28.31  22.3r 16QF135   W84  C~55Zd      
2017 10  22.24122  01 34 22.145  -05 50 45.73  23.4g 16QF135   W84  C~55Zd      
2017 10  30.20292  01 33 39.783  -05 53 06.18  22.7z 16QF135   W84  C~55Zd      
2017 11  15.16254  01 32 20.246  -05 55 51.83  22.8r 16QF135   W84  C~55Zd      
2017 11  15.16390  01 32 20.222  -05 55 51.75  23.3g 16QF135   W84  C~55Zd      
2017 11  23.14423  01 31 45.048  -05 56 08.92  22.4r 16QF135   W84  C~55Zd      
2017 11  23.14561  01 31 45.039  -05 56 09.07  23.1g 16QF135   W84  C~55Zd      
2018 09  09.39300  01 43 02.997  -04 11 04.78  22.1z 16QF135   W84  C~55Zd      
2018 10  19.27570  01 39 50.074  -04 29 06.43  22.2z 16QF135   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     0.04       0.00    -0.08
     2   0.0001     -2.78    -0.03       0.98     0.02
     3   0.0004     -9.23    -0.00       3.11     0.04
     4   2.7799  24344.77    -0.05    7191.88    -0.07
     5   2.8154  23709.77     0.06    7056.50     0.14
     6   3.8887  28141.54    -0.01    9507.72    -0.04
     7   3.8887  28141.38    -0.06    9507.73    -0.03
     8   3.9623  25912.60     0.08    9745.19    -0.00
     9   3.9841  25268.28     0.01    9875.12     0.04
    10   4.0278  24100.61     0.01   10208.68    -0.07
    11   4.0278  24100.31    -0.20   10208.90     0.12
    12   4.0496  23607.68     0.11   10407.80     0.04
    13   4.0496  23607.49     0.01   10407.71    -0.08
    14   4.8443  35703.17     0.03   12066.62    -0.00
    15   4.9535  32539.77    -0.00   12258.55    -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.

16QF135    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        49.049    49.069    49.029
ecceobj         0.254     0.254     0.254
incobj         27.619    27.619    27.619
qmin           35.325    35.308    35.326
qmax           62.629    62.679    62.658
amean          48.677    48.708    48.676
amin           48.222    48.258    48.215
amax           49.216    49.237    49.238
emean           0.254     0.254     0.254
emin            0.236     0.237     0.234
emax            0.273     0.273     0.273
imean          26.560    26.554    26.560
imin           25.992    25.989    26.004
imax           27.050    27.052    27.061
excite_mean     0.514     0.514     0.514
fracstop        1.000     1.000     1.000
cjmean          2.819     2.819     2.819

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       174.8     175.3     175.5
kozaiamp        180.0     180.0     180.0