Orbit Fit and Astrometric record for 15KF174

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: 15KF174   
# Created Fri Dec  3 02:13:22 2021
# Orbit generated from Bernstein formalism
# Fitting     24 observations of     24
# Arc:   2.03y
# First observation: 2015/03/19
#  Last observation: 2017/03/28
Preliminary a, adot, b, bdot, g, gdot:
  -0.000218   0.046956   0.000025   0.003155   0.034007   0.000000
# Chi-squared of fit:     5.42 DOF:     42 RMS:  0.08
# Min/Max residuals:    -0.23    0.24
# Exact a, adot, b, bdot, g, gdot:
  2.059594E-05  4.685788E-02  1.358550E-06  3.162711E-03  3.403633E-02  5.676007E-03
# Covariance matrix:
  2.3795E-13 -6.5248E-14 -7.1411E-15  6.5534E-15  1.6401E-13  9.1940E-13
 -6.5248E-14  7.3646E-13 -1.7960E-14  6.0080E-14  2.6156E-13  9.7439E-12
 -7.1411E-15 -1.7960E-14  1.2271E-13 -1.1201E-13 -1.5868E-14 -3.3014E-13
  6.5534E-15  6.0080E-14 -1.1201E-13  2.0391E-13  3.1134E-14  1.0871E-12
  1.6401E-13  2.6156E-13 -1.5868E-14  3.1134E-14  3.0707E-13  4.8678E-12
  9.1940E-13  9.7439E-12 -3.3014E-13  1.0871E-12  4.8678E-12  1.7617E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.143444 -124.067224    0.836270    0.075817   -0.529028  2457101.141658
# Heliocentric elements and errors
Epoch:              2457100.5000  =  2015/03/19
Mean Anomaly:            5.35897 +/-     0.014
Argument of Peri:       46.31703 +/-     0.047
Long of Asc Node:      171.45954 +/-     0.003
Inclination:             8.96967 +/-     0.000
Eccentricity:         0.47245856 +/-    0.0002
Semi-Major Axis:     55.94235444 +/-    0.0119
Time of Perihelion: 2454825.4637 +/-       6.0
Perihelion:          29.51190994 +/-    0.0105
Aphelion:            82.37279894 +/-    0.0195
Period (y)              418.4266 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -17.28665615 +/-    0.0003
Ecliptic Y          -24.06690044 +/-    0.0004
Ecliptic Z            4.16185395 +/-    0.0001
Ecliptic XDOT         0.00288594 +/-    0.0000
Ecliptic YDOT        -0.00246171 +/-    0.0000
Ecliptic ZDOT         0.00031660 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.92265373 +/-    0.0003
Geocenter to KBO     29.38037480 +/-    0.0005
# Hcoef: 10.02

The following table shows the complete astrometric record for 15KF174. 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 (15KF174) followed by the observatory code and reference code for the source of the astrometry.

2015 03  19.64088  15 42 14.932  -11 18 58.73  24.3r 15KF174   568  C~2lVI      
2015 03  22.56046  15 42 07.963  -11 17 46.28  25.1r 15KF174   568  C~2lVI      
2015 03  22.62952  15 42 07.762  -11 17 44.38  25.1r 15KF174   568  C~2lVI      
2015 04  13.57241  15 40 45.788  -11 07 49.50  24.8r 15KF174   568  C~2lVI      
2015 04  13.61353  15 40 45.600  -11 07 48.44  24.9r 15KF174   568  C~2lVI      
2015 05  21.34311  15 37 08.242  -10 51 07.25  24.8r 15KF174   568  C~2lVI      
2015 05  21.38417  15 37 07.978  -10 51 06.40  24.9r 15KF174   568  C~2lVI      
2015 05  21.42550  15 37 07.718  -10 51 05.34  24.7r 15KF174   568  C~2lVJ      
2015 05  22.49770  15 37 01.088  -10 50 41.54  24.7r 15KF174   568  C~2lVJ      
2015 05  25.48844  15 36 42.690  -10 49 36.82  24.7r 15KF174   568  C~2lVJ      
2015 06  20.37754  15 34 17.094  -10 42 50.87  24.2r 15KF174   568  C~2lVJ      
2015 06  20.41847  15 34 16.887  -10 42 50.50  24.7r 15KF174   568  C~2lVJ      
2015 06  23.43876  15 34 02.508  -10 42 23.87  24.7r 15KF174   568  C~2lVJ      
2015 07  11.32142  15 32 54.191  -10 41 26.01  24.4r 15KF174   568  C~2lVJ      
2015 07  12.30139  15 32 51.360  -10 41 27.81  24.9r 15KF174   568  C~2lVJ      
2016 02  12.63086  15 52 47.396  -11 54 15.59  24.9w 15KF174   568  C~2lVJ      
2016 04  03.55879  15 52 18.516  -11 37 39.37  25.2w 15KF174   568  C~2lVJ      
2016 04  08.60833  15 51 58.625  -11 35 25.58  25.4w 15KF174   568  C~2lVJ      
2016 04  29.50547  15 50 13.820  -11 26 04.75  24.6w 15KF174   568  C~2lVJ      
2016 05  04.47810  15 49 44.920  -11 23 55.84  24.5w 15KF174   568  C~2lVJ      
2016 05  30.45392  15 47 05.764  -11 14 15.86  24.9w 15KF174   568  C~2lVJ      
2016 07  04.31437  15 44 05.721  -11 08 08.35  25.5w 15KF174   568  C~2lVJ      
2016 07  05.38672  15 44 01.629  -11 08 06.38  25.2w 15KF174   568  C~2lVJ      
2017 03  28.61692  16 03 24.685  -12 03 54.95  25.3w 15KF174   568  C~2lVJ      

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     0.24       0.00     0.02
     2   0.0080   -116.29     0.03      47.26    -0.02
     3   0.0082   -119.60    -0.23      48.43     0.09
     4   0.0683  -1429.60    -0.13     352.78    -0.05
     5   0.0684  -1432.53     0.08     353.18    -0.12
     6   0.1717  -4778.39     0.04     591.67    -0.01
     7   0.1718  -4782.38    -0.03     591.60    -0.09
     8   0.1719  -4786.35    -0.05     591.74     0.04
     9   0.1748  -4886.94     0.02     592.29    -0.08
    10   0.1830  -5165.77    -0.06     592.48    -0.01
    11   0.2539  -7348.83     0.10     488.01     0.10
    12   0.2540  -7351.89     0.06     487.65     0.06
    13   0.2623  -7564.45    -0.07     463.99     0.04
    14   0.3112  -8558.42     0.11     284.15     0.07
    15   0.3139  -8598.63    -0.13     272.60     0.10
    16   0.9035   9537.61    -0.06       6.47     0.02
    17   1.0429   8904.89    -0.02     886.83     0.00
    18   1.0567   8589.87     0.06     953.44    -0.16
    19   1.1139   6961.51     0.12    1161.99    -0.11
    20   1.1275   6518.14    -0.05    1193.89     0.01
    21   1.1987   4105.21    -0.01    1239.34    -0.01
    22   1.2941   1440.43     0.03    1002.66    -0.03
    23   1.2970   1381.31    -0.06     990.99     0.06
    24   2.0259  18842.11    -0.01    1442.63     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.

15KF174    quality flag:3

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

axisobj        55.107    55.164    55.049
ecceobj         0.464     0.465     0.464
incobj          8.992     8.992     8.992
qmin           28.929    28.951    28.952
qmax           83.615    83.757    83.588
amean          55.462    55.463    55.462
amin           54.612    54.569    54.666
amax           56.542    56.660    56.535
emean           0.468     0.468     0.468
emin            0.457     0.457     0.458
emax            0.479     0.479     0.479
imean           8.518     8.571     8.467
imin            8.277     8.249     8.314
imax            8.770     8.858     8.625
excite_mean     0.491     0.491     0.490
fracstop        1.000     1.000     1.000
cjmean          2.916     2.915     2.916

libcent 0       180.0     179.1     179.6
libamp  0       121.1     134.8     106.3
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       153.4     173.0     157.2
kozaiamp        179.9     179.9     179.9