Orbit Fit and Astrometric record for 15KQ173

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: 15KQ173   
# Created Sat Nov 27 02:13:28 2021
# Orbit generated from Bernstein formalism
# Fitting     25 observations of     25
# Arc:   2.10y
# First observation: 2014/05/30
#  Last observation: 2016/07/05
Preliminary a, adot, b, bdot, g, gdot:
  -0.000013   0.028166   0.000100  -0.022122   0.031320   0.000000
# Chi-squared of fit:     6.98 DOF:     44 RMS:  0.09
# Min/Max residuals:    -0.41    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.353704E-05  2.785534E-02 -1.106773E-05 -2.183979E-02  3.096124E-02 -7.830744E-03
# Covariance matrix:
  2.1824E-13 -2.3632E-13 -2.5536E-14  8.5373E-14 -4.0922E-15 -1.8788E-12
 -2.3632E-13  5.7390E-13  1.1408E-13 -3.7467E-13  2.1341E-13  8.2383E-12
 -2.5536E-14  1.1408E-13  2.1982E-13 -2.3234E-13  6.7128E-14  2.1607E-12
  8.5373E-14 -3.7467E-13 -2.3234E-13  4.5858E-13 -2.0528E-13 -7.0806E-12
 -4.0922E-15  2.1341E-13  6.7128E-14 -2.0528E-13  5.6499E-13  4.4976E-12
 -1.8788E-12  8.2383E-12  2.1607E-12 -7.0806E-12  4.4976E-12  1.5567E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.465220 -124.619463   -0.236429    0.111172   -0.980581  2456807.906448
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:          318.64228 +/-     0.018
Argument of Peri:      235.81917 +/-     0.040
Long of Asc Node:       63.70446 +/-     0.000
Inclination:            38.58983 +/-     0.001
Eccentricity:         0.25583750 +/-    0.0004
Semi-Major Axis:     39.32921975 +/-    0.0089
Time of Perihelion: 2467150.1457 +/-       3.0
Perihelion:          29.26733046 +/-    0.0155
Aphelion:            49.39110904 +/-    0.0179
Period (y)              246.6500 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -18.60039471 +/-    0.0004
Ecliptic Y          -27.35567506 +/-    0.0006
Ecliptic Z            3.63651335 +/-    0.0001
Ecliptic XDOT         0.00228918 +/-    0.0000
Ecliptic YDOT        -0.00101577 +/-    0.0000
Ecliptic ZDOT        -0.00199682 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.27960142 +/-    0.0006
Geocenter to KBO     32.29845120 +/-    0.0008
# Hcoef:  8.73

The following table shows the complete astrometric record for 15KQ173. 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 (15KQ173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  30.40567  15 38 29.561  -12 49 26.57  24.1r 15KQ173   568  C~2lVG      
2014 06  01.33220  15 38 17.623  -12 49 15.09  23.9r 15KQ173   568  C~2lVG      
2014 06  01.37504  15 38 17.324  -12 49 14.79  21.5r 15KQ173   568  C~2lVG      
2014 06  22.32930  15 36 18.004  -12 48 30.60  24.4r 15KQ173   568  C~2lVG      
2014 06  22.37222  15 36 17.763  -12 48 30.79  24.4r 15KQ173   568  C~2lVG      
2014 07  19.34581  15 34 31.450  -12 51 54.68  24.6r 15KQ173   568  C~2lVG      
2015 04  18.51897  15 48 05.070  -14 31 39.42  24.3r 15KQ173   568  C~2lVG      
2015 05  17.39179  15 45 10.042  -14 26 54.51  23.6r 15KQ173   568  C~2lVG      
2015 05  17.43344  15 45 09.768  -14 26 54.16  24.3r 15KQ173   568  C~2lVG      
2015 05  17.48044  15 45 09.441  -14 26 53.89  24.0r 15KQ173   568  C~2lVG      
2015 05  17.48543  15 45 09.439  -14 26 53.80  24.2r 15KQ173   568  C~2lVG      
2015 05  17.51054  15 45 09.259  -14 26 53.56  23.7r 15KQ173   568  C~2lVG      
2015 05  24.37741  15 44 24.878  -14 25 57.02  23.6r 15KQ173   568  C~2lVG      
2015 05  24.42349  15 44 24.570  -14 25 56.71  23.5r 15KQ173   568  C~2lVG      
2015 05  24.46441  15 44 24.303  -14 25 56.38  23.7r 15KQ173   568  C~2lVG      
2015 06  18.35156  15 41 52.622  -14 24 03.51  24.1r 15KQ173   568  C~2lVG      
2015 06  18.39254  15 41 52.395  -14 24 03.45  24.2r 15KQ173   568  C~2lVG      
2015 06  21.36717  15 41 36.239  -14 24 02.47  24.0r 15KQ173   568  C~2lVG      
2015 07  10.39924  15 40 08.970  -14 25 14.24  23.8r 15KQ173   568  C~2lVG      
2015 07  18.32574  15 39 42.385  -14 26 27.11  23.7r 15KQ173   568  C~2lVG      
2016 04  29.53411  15 52 25.254  -16 06 02.40  23.6w 15KQ173   568  C~2lVG      
2016 05  04.50650  15 51 54.604  -16 05 19.82  23.8w 15KQ173   568  C~2lVG      
2016 05  30.44985  15 49 06.304  -16 01 59.33  23.8w 15KQ173   568  C~2lVG      
2016 07  04.33463  15 45 49.755  -16 01 00.98  24.4w 15KQ173   568  C~2lVG      
2016 07  05.40699  15 45 45.061  -16 01 05.03  24.1w 15KQ173   568  C~2lVG      

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    -0.02
     2   0.0053   -172.51     0.04     -29.32    -0.01
     3   0.0054   -176.83    -0.41     -30.04    -0.06
     4   0.0628  -1884.41     0.17    -393.53     0.07
     5   0.0629  -1887.79    -0.06    -394.54    -0.10
     6   0.1367  -3351.62     0.03    -957.70     0.07
     7   0.8846   9569.03    -0.08   -4071.67    -0.04
     8   0.9637   7023.20     0.03   -4361.68     0.11
     9   0.9638   7019.24     0.03   -4362.23     0.09
    10   0.9639   7014.54    -0.19   -4363.04    -0.11
    11   0.9639   7014.49     0.23   -4362.96     0.04
    12   0.9640   7011.89     0.02   -4363.31     0.00
    13   0.9828   6370.27     0.08   -4453.45     0.00
    14   0.9829   6365.83     0.01   -4454.16    -0.05
    15   0.9830   6361.98     0.03   -4454.71    -0.03
    16   1.0512   4188.48     0.00   -4844.97     0.01
    17   1.0513   4185.25     0.05   -4845.66     0.04
    18   1.0594   3956.37    -0.01   -4898.33     0.01
    19   1.1115   2738.17     0.02   -5259.04     0.00
    20   1.1333   2379.00    -0.06   -5418.96     0.03
    21   1.9168  14508.59     0.00   -8787.32     0.04
    22   1.9305  14065.73    -0.01   -8841.30    -0.08
    23   2.0015  11643.53     0.03   -9175.02    -0.02
    24   2.0970   8858.61    -0.08   -9746.70    -0.09
    25   2.0999   8793.38    -0.02   -9765.81     0.09

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.

15KQ173    quality flag:3

Type:           3:2E      3:2E      3:2E
Type:          6:4II     6:4II     6:4II

axisobj        39.167    39.186    39.148
ecceobj         0.257     0.258     0.256
incobj         38.639    38.639    38.639
qmin           25.009    24.907    25.194
qmax           54.441    54.610    54.372
amean          39.452    39.452    39.452
amin           39.060    39.074    39.050
amax           39.916    39.918    39.961
emean           0.299     0.300     0.296
emin            0.207     0.207     0.208
emax            0.365     0.368     0.361
imean          36.330    36.296    36.390
imin           34.681    34.597    34.802
imax           38.357    38.380    38.342
excite_mean     0.665     0.666     0.665
fracstop        1.000     1.000     1.000
cjmean          2.521     2.521     2.522

libcent 0       180.6     179.9     180.2
libamp  0        52.3      44.0      62.6
libcent 1       178.9     180.0     179.4
libamp  1       148.0     130.9     170.0
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       265.9     265.9     265.9
kozaiamp         40.4      40.5      40.4