Orbit Fit and Astrometric record for 16QG135

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: 16QG135   
# Created Sat Dec  4 02:13:53 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     25 observations of     25
# Arc:   5.21y
# First observation: 2013/09/11
#  Last observation: 2018/11/27
# Chi-squared of fit:    11.43 DOF:     44 RMS:  0.12
# Min/Max residuals:    -0.32    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.262085E-05  1.646391E-02  4.701303E-06  6.355001E-03  2.051699E-02 -2.703540E-03
# Covariance matrix:
  2.6830E-13 -1.2030E-13  1.6202E-14 -3.0146E-14  9.4409E-14 -1.0195E-12
 -1.2030E-13  1.7037E-13 -4.2531E-14  6.8926E-14  4.6428E-14  2.3144E-12
  1.6202E-14 -4.2531E-14  1.8823E-13 -7.3896E-14 -1.9734E-14 -6.7948E-13
 -3.0146E-14  6.8926E-14 -7.3896E-14  5.7750E-14  2.4740E-14  1.0985E-12
  9.4409E-14  4.6428E-14 -1.9734E-14  2.4740E-14  2.3030E-13  8.1728E-13
 -1.0195E-12  2.3144E-12 -6.7948E-13  1.0985E-12  8.1728E-13  3.6883E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -11.005654   11.742737    0.399781   -0.176454   -0.907804  2456546.764498
# Heliocentric elements and errors
Epoch:              2456546.5000  =  2013/09/11
Mean Anomaly:          262.75079 +/-     0.057
Argument of Peri:       87.42826 +/-     0.043
Long of Asc Node:       37.24012 +/-     0.001
Inclination:            23.54661 +/-     0.000
Eccentricity:         0.16669247 +/-    0.0003
Semi-Major Axis:     47.41699614 +/-    0.0055
Time of Perihelion: 2488763.3486 +/-      24.1
Perihelion:          39.51294009 +/-    0.0150
Aphelion:            55.32105218 +/-    0.0156
Period (y)              326.5196 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           47.82878691 +/-    0.0011
Ecliptic Y            9.53690978 +/-    0.0002
Ecliptic Z           -9.30456217 +/-    0.0002
Ecliptic XDOT        -0.00064152 +/-    0.0000
Ecliptic YDOT         0.00211072 +/-    0.0000
Ecliptic ZDOT         0.00090145 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   49.65008577 +/-    0.0011
Geocenter to KBO     48.74022047 +/-    0.0011
# Hcoef:  6.25

The following table shows the complete astrometric record for 16QG135. 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 (16QG135) followed by the observatory code and reference code for the source of the astrometry.

2013 09  11.26372  01 00 22.833  -05 29 27.09  23.0g 16QG135   W84  C~55Zd      
2013 09  11.28057  01 00 22.779  -05 29 27.52  22.9r 16QG135   W84  C~55Zd      
2013 11  05.03102  00 56 51.48   -05 47 08.2   23.2r 16QG135   W84  C~55Zd      
2013 11  05.06907  00 56 51.33   -05 47 08.6         16QG135   W84  C~55Zd      
2013 11  05.16374  00 56 51.00   -05 47 09.7         16QG135   W84  C~55Zd      
2013 12  21.09437  00 55 06.191  -05 46 07.64  22.9i 16QG135   W84  C~55Zd      
2014 10  03.26724  01 01 55.359  -04 55 31.16  23.5i 16QG135   W84  C~55Zd      
2014 10  03.30048  01 01 55.208  -04 55 31.75  23.4g 16QG135   W84  C~55Zd      
2014 11  15.09217  00 59 13.086  -05 06 22.64  23.1r 16QG135   W84  C~55Zd      
2014 11  27.07086  00 58 39.121  -05 07 02.74  22.8z 16QG135   W84  C~55Zd      
2015 09  04.28665  01 06 38.250  -04 01 34.45  22.8z 16QG135   W84  C~55Zd      
2015 09  04.28801  01 06 38.247  -04 01 34.46  23.5i 16QG135   W84  C~55Zd      
2016 08  25.411759 01 10 00.34   -03 15 22.6   22.8z 16QG135   W84  C~55Zd      
2016 08  25.413148 01 10 00.36   -03 15 22.5   22.8i 16QG135   W84  C~55Zd      
2016 08  26.370590 01 09 57.82   -03 15 43.1   23.0r 16QG135   W84  C~55Zd      
2016 09  01.359664 01 09 40.73   -03 17 55.1   23.6g 16QG135   W84  C~55Zd      
2016 10  23.163299 01 06 24.86   -03 36 39.0   23.2r 16QG135   W84  C~55Zd      
2016 10  23.16521  01 06 24.876  -03 36 39.37  24.1g 16QG135   W84  C~55Zd      
2016 11  05.13549  01 05 35.368  -03 39 47.55  23.7z 16QG135   W84  C~55Zd      
2016 11  05.211319 01 05 35.07   -03 39 48.3   22.7i 16QG135   W84  C~55Zd      
2016 11  05.212697 01 05 35.07   -03 39 48.4   23.2r 16QG135   W84  C~55Zd      
2016 11  05.214063 01 05 35.06   -03 39 48.4   23.4g 16QG135   W84  C~55Zd      
2017 09  03.39959  01 12 31.751  -02 35 29.35  23.7g 16QG135   W84  C~55Zd      
2018 10  19.15760  01 12 37.353  -02 08 41.10  22.8z 16QG135   W84  C~55Zd      
2018 11  27.10561  01 10 19.037  -02 16 17.76  23.5g 16QG135   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    -0.00       0.00     0.04
     2   0.0000      0.00     0.09       0.00     0.02
     3   0.1499      0.00     0.11       0.00    -0.05
     4   0.1500      0.00    -0.09       0.00    -0.05
     5   0.1503      0.00     0.06       0.00    -0.16
     6   0.2761      0.00    -0.03       0.00     0.03
     7   1.0596      0.00     0.21       0.00    -0.13
     8   1.0596      0.00    -0.03       0.00     0.01
     9   1.1768      0.00     0.01       0.00     0.00
    10   1.2096      0.00    -0.06       0.00     0.11
    11   1.9795      0.00    -0.02       0.00     0.02
    12   1.9795      0.00     0.00       0.00     0.04
    13   2.9545      0.00    -0.27       0.00    -0.07
    14   2.9546      0.00     0.08       0.00     0.06
    15   2.9572      0.00     0.16       0.00     0.01
    16   2.9736      0.00    -0.12       0.00     0.02
    17   3.1154      0.00    -0.32       0.00     0.34
    18   3.1154      0.00     0.03       0.00     0.00
    19   3.1509      0.00     0.17       0.00    -0.04
    20   3.1511      0.00    -0.10       0.00     0.11
    21   3.1511      0.00    -0.03       0.00     0.03
    22   3.1511      0.00    -0.10       0.00     0.04
    23   3.9785      0.00     0.09       0.00    -0.12
    24   5.1031      0.00     0.22       0.00    -0.24
    25   5.2097      0.00     0.06       0.00     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.

16QG135    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        47.653    47.652    47.653
ecceobj         0.163     0.163     0.163
incobj         23.499    23.499    23.499
qmin           38.908    38.866    38.888
qmax           56.263    56.300    56.273
amean          47.389    47.389    47.390
amin           46.975    46.980    46.976
amax           47.878    47.855    47.878
emean           0.159     0.160     0.159
emin            0.143     0.143     0.143
emax            0.177     0.178     0.177
imean          23.069    23.052    23.070
imin           22.692    22.672    22.693
imax           23.431    23.416    23.428
excite_mean     0.423     0.423     0.423
fracstop        1.000     1.000     1.000
cjmean          2.915     2.915     2.915

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       184.9     185.1     184.8
kozaiamp        180.0     180.0     179.9