Orbit Fit and Astrometric record for 15KE174

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: 15KE174   
# Created Fri Dec  3 02:13:22 2021
# Orbit generated from Bernstein formalism
# Fitting     24 observations of     24
# Arc:   2.50y
# First observation: 2015/02/25
#  Last observation: 2017/08/25
Preliminary a, adot, b, bdot, g, gdot:
   0.000067   0.026946   0.000071   0.010884   0.025926   0.000000
# Chi-squared of fit:     4.82 DOF:     42 RMS:  0.08
# Min/Max residuals:    -0.15    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.657938E-05  2.656111E-02  6.488873E-06  1.091635E-02  2.540651E-02  2.084584E-03
# Covariance matrix:
  2.2612E-13  2.7843E-14 -1.9778E-14 -2.1669E-15  1.9098E-13 -3.2699E-13
  2.7843E-14  6.9864E-13 -1.7462E-13  6.0931E-13  4.5463E-13  2.1738E-11
 -1.9778E-14 -1.7462E-13  1.7455E-13 -2.4370E-13 -1.1668E-13 -6.3088E-12
 -2.1669E-15  6.0931E-13 -2.4370E-13  7.6231E-13  3.0616E-13  2.5003E-11
  1.9098E-13  4.5463E-13 -1.1668E-13  3.0616E-13  5.0173E-13  1.0568E-11
 -3.2699E-13  2.1738E-11 -6.3088E-12  2.5003E-11  1.0568E-11  9.0249E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.745800 -125.980208    0.963741    0.032425   -0.209950  2457079.141088
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:            6.88754 +/-     0.130
Argument of Peri:        8.63931 +/-     0.252
Long of Asc Node:      212.55822 +/-     0.001
Inclination:            24.04720 +/-     0.001
Eccentricity:         0.29239162 +/-    0.0004
Semi-Major Axis:     55.60782848 +/-    0.0188
Time of Perihelion: 2454172.7287 +/-      54.6
Perihelion:          39.34856547 +/-    0.0261
Aphelion:            71.86709148 +/-    0.0331
Period (y)              414.6791 +/-      0.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.76253338 +/-    0.0006
Ecliptic Y          -31.08605192 +/-    0.0009
Ecliptic Z            5.98499231 +/-    0.0002
Ecliptic XDOT         0.00228726 +/-    0.0000
Ecliptic YDOT        -0.00172215 +/-    0.0000
Ecliptic ZDOT         0.00119694 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.58308666 +/-    0.0008
Geocenter to KBO     39.35998618 +/-    0.0011
# Hcoef:  7.88

The following table shows the complete astrometric record for 15KE174. 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 (15KE174) followed by the observatory code and reference code for the source of the astrometry.

2015 02  25.64031  15 35 19.456  -10 17 26.52  24.9r 15KE174   568  C~2lVI      
2015 03  19.63268  15 34 57.396  -10 08 57.03  23.7r 15KE174   568  C~2lVI      
2015 03  22.55230  15 34 51.052  -10 07 40.64  23.6r 15KE174   568  C~2lVI      
2015 04  13.56418  15 33 41.621  -09 57 31.14  24.1r 15KE174   568  C~2lVI      
2015 04  13.60528  15 33 41.458  -09 57 30.09  24.3r 15KE174   568  C~2lVI      
2015 04  18.57429  15 33 21.395  -09 55 09.17  23.7r 15KE174   568  C~2lVI      
2015 05  21.33472  15 30 48.669  -09 40 49.64  24.1r 15KE174   568  C~2lVI      
2015 05  21.37588  15 30 48.456  -09 40 48.76  23.8r 15KE174   568  C~2lVI      
2015 05  21.41717  15 30 48.255  -09 40 47.74  23.5r 15KE174   568  C~2lVI      
2015 05  22.49362  15 30 43.042  -09 40 23.42  23.4r 15KE174   568  C~2lVI      
2015 05  22.51002  15 30 42.967  -09 40 22.94  23.9r 15KE174   568  C~2lVI      
2015 05  25.48424  15 30 28.670  -09 39 17.14  23.4r 15KE174   568  C~2lVI      
2016 04  03.51011  15 40 56.668  -09 46 52.34  24.1w 15KE174   568  C~2lVI      
2016 04  08.55978  15 40 39.662  -09 44 30.64  23.3w 15KE174   568  C~2lVI      
2016 04  29.44139  15 39 13.748  -09 34 48.70  24.0w 15KE174   568  C~2lVI      
2016 05  04.37647  15 38 50.827  -09 32 37.53  24.4w 15KE174   568  C~2lVI      
2016 05  30.49437  15 36 45.178  -09 22 32.69  23.9w 15KE174   568  C~2lVI      
2016 07  05.37457  15 34 23.851  -09 15 04.84  24.0w 15KE174   568  C~2lVI      
2017 06  28.26890  15 41 26.879  -09 00 56.95  24.5w 15KE174   568  C~2lVI      
2017 07  28.28221  15 40 16.039  -09 00 22.28  24.4w 15KE174   568  C~2lVI      
2017 07  28.29649  15 40 16.039  -09 00 22.39  24.0w 15KE174   568  C~2lVI      
2017 07  29.35734  15 40 14.953  -09 00 28.30  24.4w 15KE174   568  C~2lVI      
2017 08  19.26090  15 40 15.181  -09 03 51.49  23.8w 15KE174   568  C~2lVI      
2017 08  25.26881  15 40 23.106  -09 05 18.46  23.6w 15KE174   568  C~2lVI      

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    -0.01       0.00     0.06
     2   0.0602   -437.40    -0.02     417.50    -0.07
     3   0.0682   -546.56     0.01     469.42     0.00
     4   0.1285  -1687.81     0.01     817.00     0.02
     5   0.1286  -1690.40     0.05     817.44    -0.09
     6   0.1422  -2011.94     0.08     883.49     0.09
     7   0.2319  -4410.33     0.07    1176.47     0.06
     8   0.2320  -4413.60    -0.06    1176.57    -0.03
     9   0.2321  -4416.73    -0.04    1176.84     0.05
    10   0.2351  -4497.44    -0.05    1181.88    -0.11
    11   0.2351  -4498.64    -0.00    1182.08     0.01
    12   0.2432  -4719.79    -0.00    1195.01    -0.02
    13   1.1030   4409.93    -0.08    2955.86     0.02
    14   1.1168   4132.26    -0.00    3034.94    -0.05
    15   1.1740   2760.38     0.00    3303.20     0.12
    16   1.1875   2399.92     0.10    3351.08    -0.06
    17   1.2590    450.27    -0.10    3500.59    -0.05
    18   1.3572  -1688.55    -0.01    3439.18     0.05
    19   2.3371   4202.43    -0.09    5741.37     0.02
    20   2.4193   3173.11    -0.15    5529.50     0.01
    21   2.4193   3173.14     0.10    5529.39     0.04
    22   2.4222   3158.87     0.33    5519.87    -0.01
    23   2.4795   3209.69    -0.08    5322.96     0.04
    24   2.4959   3344.23    -0.06    5265.85    -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.

15KE174    quality flag:3

Type:         5:2EEE    5:2EEE    5:2EEE
Type:                   5:2EII          

axisobj        55.016    55.085    54.947
ecceobj         0.285     0.286     0.283
incobj         24.135    24.136    24.133
qmin           35.157    34.061    35.589
qmax           76.705    77.865    76.194
amean          55.461    55.462    55.462
amin           54.856    54.810    54.890
amax           56.242    56.317    56.201
emean           0.331     0.327     0.321
emin            0.281     0.280     0.281
emax            0.364     0.385     0.357
imean          22.694    22.796    23.161
imin           21.289    19.859    21.789
imax           24.711    24.779    24.711
excite_mean     0.509     0.509     0.508
fracstop        1.000     1.000     1.000
cjmean          2.905     2.905     2.905

libcent 0       181.7     181.2     179.3
libamp  0        48.2      87.6      31.1
libcent 1      -180.0     155.7    -180.0
libamp  1      -180.0     122.5    -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       266.6     288.4     255.5
kozaiamp        180.0     180.0     180.0