Orbit Fit and Astrometric record for 15KU178

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: 15KU178   
# Created Fri Dec  3 02:13:25 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting      7 observations of      7
# Arc:  10.02y
# First observation: 2005/05/14
#  Last observation: 2015/05/23
# Chi-squared of fit:     4.92 DOF:      8 RMS:  0.15
# Min/Max residuals:    -0.21    0.42
# Exact a, adot, b, bdot, g, gdot:
  1.478618E-05  2.417138E-02 -4.910015E-06 -9.134252E-03  2.583653E-02  2.569038E-03
# Covariance matrix:
  5.2196E-13  2.1242E-11  1.1365E-14 -8.0906E-12  1.4364E-11  8.8756E-11
  2.1242E-11  1.4216E-08  7.9274E-12 -5.4297E-09  3.2802E-09  5.9578E-08
  1.1365E-14  7.9274E-12  3.7182E-13 -3.0645E-12  1.7905E-12  3.3224E-11
 -8.0906E-12 -5.4297E-09 -3.0645E-12  2.0738E-09 -1.2500E-09 -2.2755E-08
  1.4364E-11  3.2802E-09  1.7905E-12 -1.2500E-09  1.4853E-09  1.3714E-08
  8.8756E-11  5.9578E-08  3.3224E-11 -2.2755E-08  1.3714E-08  2.4968E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.816103 -132.479211   -0.109713   -0.031664   -1.001223  2453504.874123
# Heliocentric elements and errors
Epoch:              2453504.5000  =  2005/05/14
Mean Anomaly:           73.08318 +/-    14.283
Argument of Peri:      100.08424 +/-    13.266
Long of Asc Node:       42.99308 +/-     0.001
Inclination:            20.73588 +/-     0.003
Eccentricity:         0.10461337 +/-    0.0175
Semi-Major Axis:     40.52082540 +/-    0.3341
Time of Perihelion: 2434378.2083 +/-    3745.3
Perihelion:          36.28180536 +/-    0.7688
Aphelion:            44.75984545 +/-    0.7986
Period (y)              257.9441 +/-      3.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.72458931 +/-    0.0392
Ecliptic Y          -29.34530301 +/-    0.0428
Ecliptic Z           -1.22678325 +/-    0.0018
Ecliptic XDOT         0.00172675 +/-    0.0000
Ecliptic YDOT        -0.00191489 +/-    0.0000
Ecliptic ZDOT        -0.00097603 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.70957655 +/-    0.0412
Geocenter to KBO     38.70485690 +/-    0.0581
# Hcoef:  6.78

The following table shows the complete astrometric record for 15KU178. 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 (15KU178) followed by the observatory code and reference code for the source of the astrometry.

2005 05  14.37338  14 58 04.28   -18 48 07.2   22.6r 15KU178   568  C~0D3W      
2005 05  14.40709  14 58 04.10   -18 48 06.7   22.7r 15KU178   568  C~0D3W      
2005 05  14.44596  14 58 03.89   -18 48 05.9   22.8r 15KU178   568  C~0D3W      
2005 05  17.34300  14 57 48.70   -18 47 16.0   22.5r 15KU178   568  C~0D3W      
2015 05  21.26242  15 48 59.27   -27 01 43.5         15KU178   W84  C~2zsT      
2015 05  22.30761  15 48 53.43   -27 01 31.4   22.8V 15KU178   W84  C~2zsT      
2015 05  23.21767  15 48 48.38   -27 01 20.9         15KU178   W84  C~2zsT      

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    -0.04       0.00    -0.13
     2   0.0001      0.00    -0.03       0.00    -0.21
     3   0.0002      0.00    -0.05       0.00    -0.07
     4   0.0081      0.00     0.09       0.00     0.42
     5  10.0175      0.00     0.03       0.00    -0.01
     6  10.0204      0.00    -0.12       0.00     0.06
     7  10.0228      0.00     0.08       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.

15KU178    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.076    40.076    40.076
ecceobj         0.101     0.101     0.101
incobj         20.844    20.844    20.844
qmin           35.513    35.520    35.512
qmax           45.391    45.345    45.393
amean          40.332    40.332    40.332
amin           40.005    40.003    40.001
amax           40.682    40.673    40.690
emean           0.099     0.099     0.099
emin            0.083     0.084     0.083
emax            0.117     0.116     0.116
imean          19.508    19.508    19.508
imin           18.674    18.663    18.667
imax           20.338    20.339    20.336
excite_mean     0.348     0.348     0.348
fracstop        1.000     1.000     1.000
cjmean          2.918     2.918     2.918

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       183.5     183.6     183.5
kozaiamp        179.9     180.0     180.0