Orbit Fit and Astrometric record for 15KO174

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: 15KO174   
# Created Mon Dec  6 02:13:22 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     36 observations of     36
# Arc:   6.21y
# First observation: 2015/02/25
#  Last observation: 2021/05/12
# Chi-squared of fit:     7.99 DOF:     66 RMS:  0.08
# Min/Max residuals:    -0.28    0.25
# Exact a, adot, b, bdot, g, gdot:
  2.037800E-05  4.046829E-02 -4.408495E-07 -1.880277E-03  3.020781E-02 -1.915632E-03
# Covariance matrix:
  1.5258E-13 -3.4009E-14 -5.4245E-15  9.2326E-16  7.7359E-14 -8.0728E-14
 -3.4009E-14  1.1418E-13 -1.1315E-15 -3.6490E-15  5.5180E-14  4.5464E-13
 -5.4245E-15 -1.1315E-15  6.7165E-14 -2.1923E-14 -6.2101E-15 -3.7445E-15
  9.2326E-16 -3.6490E-15 -2.1923E-14  1.7694E-14 -1.6167E-15 -1.7302E-14
  7.7359E-14  5.5180E-14 -6.2101E-15 -1.6167E-15  1.1574E-13  2.3572E-13
 -8.0728E-14  4.5464E-13 -3.7445E-15 -1.7302E-14  2.3572E-13  2.1460E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.784096 -126.886011    0.960408    0.030876   -0.224928  2457079.105118
# Heliocentric elements and errors
Epoch:              2457078.5000  =  2015/02/25
Mean Anomaly:          356.72497 +/-     0.002
Argument of Peri:      119.87082 +/-     0.006
Long of Asc Node:      123.75979 +/-     0.001
Inclination:             8.10601 +/-     0.000
Eccentricity:         0.52656993 +/-    0.0000
Semi-Major Axis:     69.86886627 +/-    0.0074
Time of Perihelion: 2459019.1010 +/-      33.5
Perihelion:          33.07802225 +/-    0.0047
Aphelion:           106.65971030 +/-    0.0117
Period (y)              584.0281 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -20.59371866 +/-    0.0002
Ecliptic Y          -25.83863511 +/-    0.0003
Ecliptic Z            4.48362747 +/-    0.0001
Ecliptic XDOT         0.00301943 +/-    0.0000
Ecliptic YDOT        -0.00208800 +/-    0.0000
Ecliptic ZDOT        -0.00019227 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.34430522 +/-    0.0003
Geocenter to KBO     33.10407505 +/-    0.0004
# Hcoef:  7.95

The following table shows the complete astrometric record for 15KO174. 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 (15KO174) followed by the observatory code and reference code for the source of the astrometry.

2015 02  25.60434  15 30 50.516  -11 00 31.45  23.1r 15KO174   568  C~2lVK      
2015 03  19.60818  15 30 25.815  -10 54 19.00  23.3r 15KO174   568  C~2lVK      
2015 03  22.52639  15 30 18.497  -10 53 18.86  23.2r 15KO174   568  C~2lVK      
2015 04  13.53954  15 28 57.874  -10 44 59.15  23.2r 15KO174   568  C~2lVK      
2015 04  13.58065  15 28 57.677  -10 44 58.17  23.3r 15KO174   568  C~2lVK      
2015 04  18.54408  15 28 34.357  -10 43 00.26  23.0r 15KO174   568  C~2lVK      
2015 05  22.46905  15 25 30.819  -10 30 45.58  23.1r 15KO174   568  C~2lVK      
2015 05  24.38151  15 25 20.241  -10 30 11.90  23.1r 15KO174   568  C~2lVK      
2015 05  24.42760  15 25 19.974  -10 30 11.05  23.1r 15KO174   568  C~2lVK      
2015 05  24.46857  15 25 19.748  -10 30 10.35  23.1r 15KO174   568  C~2lVK      
2015 05  25.45951  15 25 14.274  -10 29 53.49  23.2r 15KO174   568  C~2lVK      
2015 05  26.45643  15 25 08.804  -10 29 36.75  23.1r 15KO174   568  C~2lVK      
2015 06  20.34904  15 23 05.184  -10 24 45.17  23.3r 15KO174   568  C~2lVK      
2015 06  20.38989  15 23 05.004  -10 24 44.91  23.3r 15KO174   568  C~2lVK      
2015 06  23.40938  15 22 52.490  -10 24 28.17  23.3r 15KO174   568  C~2lVK      
2015 07  11.28306  15 21 54.022  -10 24 21.24  23.2r 15KO174   568  C~2lVK      
2015 07  18.35221  15 21 39.260  -10 25 03.18        15KO174   568  C~2lVK      
2016 02  05.63489  15 39 22.455  -11 42 47.44  23.3w 15KO174   568  C~2lVK      
2016 02  11.64674  15 39 37.860  -11 42 20.93  23.5w 15KO174   568  C~2lVK      
2016 03  17.59717  15 39 40.205  -11 34 53.57  23.3w 15KO174   568  C~2lVK      
2016 04  03.52224  15 38 51.749  -11 29 07.65  23.2w 15KO174   568  C~2lVK      
2016 04  08.57191  15 38 32.105  -11 27 16.01  23.3w 15KO174   568  C~2lVK      
2016 04  29.45352  15 36 52.263  -11 19 26.66  23.3w 15KO174   568  C~2lVK      
2016 05  04.38860  15 36 25.564  -11 17 39.82  23.3w 15KO174   568  C~2lVK      
2016 05  30.49033  15 33 59.590  -11 09 38.93  23.3w 15KO174   568  C~2lVK      
2016 07  03.35835  15 31 24.709  -11 05 15.72  23.6w 15KO174   568  C~2lVK      
2016 07  05.34215  15 31 18.237  -11 05 16.42  23.5w 15KO174   568  C~2lVK      
2017 03  28.59816  15 48 31.684  -12 10 46.31  23.5w 15KO174   568  C~2lVK      
2017 06  26.28306  15 41 10.186  -11 45 55.41  23.5w 15KO174   568  C~2lVK      
2017 07  28.28692  15 39 42.681  -11 47 46.31  23.7w 15KO174   568  C~2lVK      
2017 07  28.30120  15 39 42.668  -11 47 46.55  23.4w 15KO174   568  C~2lVK      
2017 07  29.36204  15 39 41.560  -11 47 58.03  22.4w 15KO174   568  C~2lVK      
2017 08  19.25564  15 39 46.439  -11 53 32.72  23.4w 15KO174   568  C~2lVK      
2017 08  25.26415  15 39 57.324  -11 55 41.98  23.6w 15KO174   568  C~2lVK      
2021 05  12.414670 16 23 23.554  -14 24 24.26  23.3G 15KO174   G37  C~4pVr      
2021 05  12.446770 16 23 23.388  -14 24 23.99        15KO174   G37  C~4pVs      

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    -0.15
     2   0.0602      0.00    -0.07       0.00     0.00
     3   0.0682      0.00    -0.06       0.00    -0.02
     4   0.1285      0.00    -0.01       0.00     0.01
     5   0.1286      0.00    -0.10       0.00     0.01
     6   0.1422      0.00    -0.11       0.00    -0.04
     7   0.2351      0.00    -0.00       0.00    -0.05
     8   0.2403      0.00     0.19       0.00    -0.01
     9   0.2404      0.00     0.08       0.00     0.04
    10   0.2406      0.00     0.15       0.00     0.03
    11   0.2433      0.00    -0.04       0.00    -0.04
    12   0.2460      0.00    -0.01       0.00    -0.01
    13   0.3142      0.00    -0.00       0.00     0.03
    14   0.3143      0.00    -0.03       0.00     0.03
    15   0.3225      0.00     0.00       0.00     0.02
    16   0.3715      0.00    -0.01       0.00     0.00
    17   0.3908      0.00    -0.11       0.00     0.00
    18   0.9446      0.00     0.02       0.00    -0.01
    19   0.9611      0.00     0.02       0.00    -0.03
    20   1.0568      0.00     0.00       0.00    -0.02
    21   1.1031      0.00    -0.01       0.00     0.03
    22   1.1170      0.00    -0.01       0.00    -0.02
    23   1.1741      0.00    -0.04       0.00    -0.00
    24   1.1876      0.00     0.02       0.00    -0.11
    25   1.2591      0.00    -0.00       0.00    -0.00
    26   1.3518      0.00    -0.28       0.00     0.01
    27   1.3573      0.00    -0.01       0.00     0.03
    28   2.0862      0.00    -0.09       0.00     0.09
    29   2.3318      0.00     0.07       0.00     0.09
    30   2.4194      0.00     0.10       0.00    -0.04
    31   2.4194      0.00     0.16       0.00    -0.13
    32   2.4223      0.00     0.03       0.00     0.25
    33   2.4795      0.00    -0.04       0.00     0.09
    34   2.4960      0.00    -0.05       0.00     0.11
    35   6.2089      0.00    -0.13       0.00     0.04
    36   6.2090      0.00     0.08       0.00    -0.19

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.

15KO174    quality flag:3

Type:       7:2EEEEE  7:2EEEEE  7:2EEEEE

axisobj        68.723    68.722    68.723
ecceobj         0.519     0.519     0.519
incobj          8.104     8.104     8.104
qmin           32.333    32.339    32.327
qmax          108.968   109.019   108.893
amean          69.409    69.409    69.408
amin           68.332    68.285    68.290
amax           70.983    71.008    70.982
emean           0.524     0.524     0.524
emin            0.514     0.514     0.514
emax            0.535     0.535     0.535
imean           6.481     6.481     6.482
imin            6.225     6.224     6.226
imax            6.747     6.747     6.750
excite_mean     0.536     0.536     0.536
fracstop        1.000     1.000     1.000
cjmean          3.004     3.004     3.004

libcent 0       180.7     180.6     179.7
libamp  0       102.1     101.6     102.2
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       199.1     199.0     199.2
kozaiamp         89.3      89.2      89.6