Orbit Fit and Astrometric record for 15QZ33

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: 15QZ33    
# Created Sat Dec  4 02:13:28 2021
# Orbit generated from Bernstein formalism
# Fitting     16 observations of     16
# Arc:   3.93y
# First observation: 2014/12/26
#  Last observation: 2018/12/02
Preliminary a, adot, b, bdot, g, gdot:
   0.000220   0.020975   0.000046  -0.000163   0.022308   0.000000
# Chi-squared of fit:     7.95 DOF:     26 RMS:  0.12
# Min/Max residuals:    -0.24    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.581877E-05  2.122928E-02  9.728915E-07 -1.927272E-04  2.189541E-02  5.697202E-03
# Covariance matrix:
  1.0558E-12 -1.1432E-12 -1.0390E-13  6.6837E-14 -4.1435E-13 -1.1332E-11
 -1.1432E-12  1.7761E-12  5.7906E-14 -1.1520E-13  3.0868E-13  1.9060E-11
 -1.0390E-13  5.7906E-14  3.1479E-13 -1.2411E-13  1.1016E-13  5.9300E-13
  6.6837E-14 -1.1520E-13 -1.2411E-13  8.4575E-14 -1.7405E-14 -1.2941E-12
 -4.1435E-13  3.0868E-13  1.1016E-13 -1.7405E-14  3.8601E-13  3.2751E-12
 -1.1332E-11  1.9060E-11  5.9300E-13 -1.2941E-12  3.2751E-12  2.1389E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -29.116234   10.632119   -0.975662   -0.056001   -0.100966  2457017.631328
# Heliocentric elements and errors
Epoch:              2457010.5000  =  2014/12/19
Mean Anomaly:           43.36908 +/-     0.044
Argument of Peri:      193.49261 +/-     0.024
Long of Asc Node:      101.85268 +/-     0.002
Inclination:            29.04037 +/-     0.000
Eccentricity:         0.32023328 +/-    0.0007
Semi-Major Axis:     54.78001844 +/-    0.0330
Time of Perihelion: 2439169.9016 +/-       8.0
Perihelion:          37.23763358 +/-    0.0467
Aphelion:            72.32240329 +/-    0.0598
Period (y)              405.4539 +/-      0.37
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.14587682 +/-    0.0011
Ecliptic Y            8.34352185 +/-    0.0002
Ecliptic Z          -22.22308796 +/-    0.0006
Ecliptic XDOT         0.00010638 +/-    0.0000
Ecliptic YDOT         0.00271645 +/-    0.0000
Ecliptic ZDOT        -0.00036759 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.78077836 +/-    0.0010
Geocenter to KBO     45.67167921 +/-    0.0013
# Hcoef:  6.84

The following table shows the complete astrometric record for 15QZ33. 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 (15QZ33) followed by the observatory code and reference code for the source of the astrometry.

2014 12  26.13055  01 26 44.482  -22 28 37.61  23.3i 15QZ33    W84  C~55Wd      
2015 08  24.38018  01 38 40.077  -21 36 50.99  23.8r 15QZ33    W84  C~55Wd      
2015 08  24.38155  01 38 40.075  -21 36 51.08  23.9i 15QZ33    W84  C~55Wd      
2015 11  06.13569  01 33 54.404  -22 11 43.95  23.5r 15QZ33    W84  C~55Wd      
2015 11  06.13841  01 33 54.381  -22 11 43.88  23.2i 15QZ33    W84  C~55Wd      
2015 11  07.14990  01 33 50.141  -22 11 48.26  23.9g 15QZ33    W84  C~55Wd      
2015 11  07.15128  01 33 50.115  -22 11 48.24  23.5i 15QZ33    W84  C~55Wd      
2015 11  15.21470  01 33 17.293  -22 11 51.67  23.9r 15QZ33    W84  C~55Wd      
2015 11  18.15552  01 33 06.004  -22 11 39.45  23.5i 15QZ33    W84  C~55Wd      
2016 10  05.28499  01 40 53.435  -21 31 35.00  22.9i 15QZ33    W84  C~55Wd      
2016 10  28.28554  01 39 11.380  -21 39 22.34  23.1g 15QZ33    W84  C~55Wd      
2017 09  26.27128  01 46 07.039  -20 55 15.15  23.9r 15QZ33    W84  C~55Wd      
2017 09  26.27266  01 46 07.021  -20 55 15.24  24.2g 15QZ33    W84  C~55Wd      
2017 11  23.20927  01 42 02.983  -21 08 55.74  23.3r 15QZ33    W84  C~55Wd      
2017 12  07.13027  01 41 18.876  -21 05 41.15  22.5z 15QZ33    W84  C~55Wd      
2018 12  02.09146  01 46 04.579  -20 36 08.83  23.7g 15QZ33    W84  C~55Wd      

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    -0.10       0.00    -0.23
     2   0.6605  10323.44     0.00   -1497.25     0.15
     3   0.6605  10323.38     0.00   -1497.32     0.11
     4   0.8624   5825.62    -0.02   -1640.42     0.02
     5   0.8624   5825.36    -0.12   -1640.22     0.16
     6   0.8652   5770.36     0.31   -1618.60    -0.13
     7   0.8652   5770.04     0.07   -1618.43     0.01
     8   0.8873   5357.40     0.03   -1423.88     0.14
     9   0.8953   5221.24    -0.04   -1344.97    -0.04
    10   1.7773  12137.18    -0.16   -2037.97    -0.13
    11   1.8403  10649.31    -0.10   -1826.12    -0.01
    12   2.7519  17059.06     0.18   -2053.15     0.07
    13   2.7519  17058.79     0.00   -2053.11     0.11
    14   2.9106  13617.58     0.10   -1251.40    -0.11
    15   2.9487  13149.41    -0.12    -801.53    -0.24
    16   3.9342  17548.48    -0.05   -1010.96     0.12

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.

15QZ33    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        55.444    55.543    55.348
ecceobj         0.326     0.328     0.324
incobj         29.047    29.047    29.047
qmin           35.445    34.518    35.607
qmax           75.759    77.905    75.241
amean          55.108    55.468    54.999
amin           54.516    54.614    54.404
amax           55.905    56.528    55.741
emean           0.336     0.348     0.331
emin            0.316     0.316     0.313
emax            0.356     0.378     0.350
imean          26.831    26.543    26.985
imin           26.305    25.432    26.462
imax           27.570    27.557    27.690
excite_mean     0.563     0.567     0.562
fracstop        1.000     1.000     1.000
cjmean          2.821     2.819     2.821

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       182.3     184.5     191.3
kozaiamp        180.0     180.0     180.0