Orbit Fit and Astrometric record for 15QX33

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: 15QX33    
# Created Wed Dec  8 02:13:29 2021
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:   3.96y
# First observation: 2014/12/17
#  Last observation: 2018/12/03
Preliminary a, adot, b, bdot, g, gdot:
  -0.000212   0.028682   0.000084   0.001775   0.027485   0.000000
# Chi-squared of fit:     7.70 DOF:     52 RMS:  0.09
# Min/Max residuals:    -0.21    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.607585E-05  2.845741E-02  1.522086E-06  1.781615E-03  2.684335E-02  9.082406E-04
# Covariance matrix:
  8.6317E-13 -6.9176E-13 -2.9896E-14 -1.5975E-14 -3.2750E-13 -4.4155E-12
 -6.9176E-13  8.4917E-13 -1.7482E-14  2.8382E-14  1.8952E-13  6.3261E-12
 -2.9896E-14 -1.7482E-14  1.8763E-13 -7.4476E-14  3.3381E-14 -2.2538E-13
 -1.5975E-14  2.8382E-14 -7.4476E-14  4.2186E-14  1.6622E-15  2.3396E-13
 -3.2750E-13  1.8952E-13  3.3381E-14  1.6622E-15  2.0230E-13  1.1107E-12
 -4.4155E-12  6.3261E-12 -2.2538E-13  2.3396E-13  1.1107E-12  5.0401E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -25.262892   14.397395   -0.926119   -0.141059   -0.299387  2457008.653288
# Heliocentric elements and errors
Epoch:              2457000.5000  =  2014/12/09
Mean Anomaly:           34.37513 +/-     0.090
Argument of Peri:      238.08894 +/-     0.115
Long of Asc Node:       96.10814 +/-     0.001
Inclination:            25.36882 +/-     0.000
Eccentricity:         0.09019843 +/-    0.0002
Semi-Major Axis:     40.45473254 +/-    0.0036
Time of Perihelion: 2448026.3297 +/-      23.3
Perihelion:          36.80577900 +/-    0.0089
Aphelion:            44.10368609 +/-    0.0092
Period (y)              257.3133 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.71956815 +/-    0.0005
Ecliptic Y            9.35778385 +/-    0.0002
Ecliptic Z          -15.89863636 +/-    0.0003
Ecliptic XDOT        -0.00056950 +/-    0.0000
Ecliptic YDOT         0.00284629 +/-    0.0000
Ecliptic ZDOT         0.00012490 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.56201401 +/-    0.0005
Geocenter to KBO     37.25317597 +/-    0.0006
# Hcoef:  7.54

The following table shows the complete astrometric record for 15QX33. 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 (15QX33) followed by the observatory code and reference code for the source of the astrometry.

2014 12  17.15251  01 32 56.409  -17 35 03.69  23.2r 15QX33    W84  C~55Wd      
2015 08  19.42115  01 47 20.261  -16 11 51.95  22.8i 15QX33    W84  C~55Wd      
2015 08  23.40206  01 47 12.039  -16 14 50.47  23.4r 15QX33    W84  C~55Wd      
2015 08  23.40344  01 47 12.033  -16 14 50.46  23.5i 15QX33    W84  C~55Wd      
2015 08  24.40244  01 47 09.754  -16 15 35.55  23.4r 15QX33    W84  C~55Wd      
2015 08  24.40383  01 47 09.737  -16 15 35.65  23.2i 15QX33    W84  C~55Wd      
2015 08  24.40521  01 47 09.758  -16 15 35.52  23.5r 15QX33    W84  C~55Wd      
2015 10  22.23322  01 42 57.697  -16 52 44.07  22.8z 15QX33    W84  C~55Wd      
2015 11  05.18590  01 41 44.686  -16 56 29.46  23.1i 15QX33    W84  C~55Wd      
2015 11  07.16552  01 41 34.669  -16 56 47.83  23.2z 15QX33    W84  C~55Wd      
2015 12  01.09291  01 39 48.298  -16 55 38.21  23.6r 15QX33    W84  C~55Wd      
2015 12  01.09428  01 39 48.290  -16 55 38.20  23.0i 15QX33    W84  C~55Wd      
2016 09  30.26132  01 50 49.512  -15 55 06.52  23.1i 15QX33    W84  C~55Wd      
2016 09  30.26268  01 50 49.512  -15 55 06.65  22.8r 15QX33    W84  C~55Wd      
2016 09  30.26406  01 50 49.498  -15 55 06.60  24.0g 15QX33    W84  C~55Wd      
2016 09  30.26542  01 50 49.502  -15 55 06.66  23.5r 15QX33    W84  C~55Wd      
2016 09  30.26680  01 50 49.488  -15 55 06.63  23.1i 15QX33    W84  C~55Wd      
2016 09  30.26817  01 50 49.492  -15 55 06.73  23.5g 15QX33    W84  C~55Wd      
2016 10  02.22503  01 50 39.955  -15 56 17.10  23.1r 15QX33    W84  C~55Wd      
2016 10  02.22641  01 50 39.952  -15 56 17.07  22.9i 15QX33    W84  C~55Wd      
2016 10  02.22780  01 50 39.933  -15 56 17.27  23.6g 15QX33    W84  C~55Wd      
2017 11  27.07762  01 51 59.781  -15 23 14.77  24.0i 15QX33    W84  C~55Wd      
2017 11  27.07899  01 51 59.774  -15 23 14.81  22.9z 15QX33    W84  C~55Wd      
2017 12  15.10884  01 50 56.943  -15 18 17.37  23.9g 15QX33    W84  C~55Wd      
2017 12  22.13164  01 50 39.957  -15 15 04.09  23.1i 15QX33    W84  C~55Wd      
2017 12  22.13301  01 50 39.946  -15 15 04.08  23.8g 15QX33    W84  C~55Wd      
2018 10  21.26525  02 00 57.561  -14 30 04.91  22.7z 15QX33    W84  C~55Wd      
2018 12  03.05923  01 57 30.004  -14 35 01.00  23.2r 15QX33    W84  C~55Wd      
2018 12  03.17738  01 57 29.547  -14 34 59.43  23.8g 15QX33    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     0.14       0.00    -0.10
     2   0.6715  13371.97     0.14    -569.70    -0.09
     3   0.6824  13188.69    -0.08    -682.04     0.04
     4   0.6824  13188.62    -0.08    -682.00     0.13
     5   0.6851  13139.68     0.02    -709.15     0.02
     6   0.6852  13139.41    -0.18    -709.14     0.07
     7   0.6852  13139.74     0.22    -709.15     0.10
     8   0.8462   8903.73    -0.21   -1217.59    -0.11
     9   0.8844   7855.17    -0.15    -987.18     0.06
    10   0.8898   7716.55    -0.17    -944.28    -0.07
    11   0.9553   6353.82     0.09    -249.52    -0.00
    12   0.9554   6353.72     0.05    -249.46     0.01
    13   1.7881  16547.27    -0.07    -935.00    -0.01
    14   1.7881  16547.22    -0.01    -935.12    -0.12
    15   1.7881  16547.05    -0.06    -934.99     0.01
    16   1.7881  16547.08     0.07    -935.07    -0.06
    17   1.7881  16546.91     0.01    -934.96     0.05
    18   1.7881  16546.92     0.13    -935.07    -0.06
    19   1.7935  16391.51     0.07    -940.37     0.03
    20   1.7935  16391.48     0.15    -940.32     0.08
    21   1.7935  16391.15    -0.07    -940.39     0.01
    22   2.9457  18291.00     0.07     368.39    -0.02
    23   2.9457  18290.89     0.03     368.40    -0.06
    24   2.9951  17589.46    -0.08    1026.32     0.09
    25   3.0143  17447.94     0.07    1306.59    -0.00
    26   3.0143  17447.80    -0.05    1306.67     0.02
    27   3.8443  26800.45    -0.10    -108.63     0.09
    28   3.9614  23912.92    -0.06     936.96    -0.07
    29   3.9617  23907.54     0.10     941.27    -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.

15QX33    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.825    40.837    40.812
ecceobj         0.098     0.099     0.098
incobj         25.379    25.379    25.379
qmin           36.232    36.201    36.236
qmax           45.192    45.183    45.112
amean          40.584    40.597    40.572
amin           40.259    40.281    40.260
amax           40.925    40.931    40.901
emean           0.090     0.091     0.090
emin            0.077     0.077     0.077
emax            0.104     0.105     0.104
imean          23.647    23.648    23.647
imin           23.140    23.140    23.140
imax           24.231    24.236    24.245
excite_mean     0.411     0.411     0.411
fracstop        1.000     1.000     1.000
cjmean          2.861     2.861     2.861

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       186.3     186.1     186.6
kozaiamp        180.0     179.9     179.9