Orbit Fit and Astrometric record for 14SK404

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: 14SK404   
# Created Sat Nov 27 02:12:48 2021
# Orbit generated from Bernstein formalism
# Fitting     18 observations of     18
# Arc:   4.06y
# First observation: 2014/09/27
#  Last observation: 2018/10/20
Preliminary a, adot, b, bdot, g, gdot:
   0.000121   0.033443  -0.000016  -0.003342   0.027623   0.000000
# Chi-squared of fit:    12.47 DOF:     30 RMS:  0.15
# Min/Max residuals:    -0.26    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.873001E-05  3.371670E-02 -6.527074E-07 -3.355591E-03  2.769720E-02  2.885125E-03
# Covariance matrix:
  4.7244E-13 -2.6435E-13 -3.6514E-14  2.3141E-14  1.7735E-13 -1.3900E-12
 -2.6435E-13  4.0183E-13  2.3389E-14 -3.8768E-14  2.5483E-14  3.1332E-12
 -3.6514E-14  2.3389E-14  2.5544E-13 -9.1774E-14 -3.3148E-14  1.7666E-13
  2.3141E-14 -3.8768E-14 -9.1774E-14  5.1405E-14  2.6997E-15 -3.3768E-13
  1.7735E-13  2.5483E-14 -3.3148E-14  2.6997E-15  2.6735E-13  4.5305E-13
 -1.3900E-12  3.1332E-12  1.7666E-13 -3.3768E-13  4.5305E-13  2.7868E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -26.153321   25.050607    0.364188   -0.412618   -0.840643  2456927.773268
# Heliocentric elements and errors
Epoch:              2456920.5000  =  2014/09/20
Mean Anomaly:            5.38216 +/-     0.010
Argument of Peri:      243.32596 +/-     0.028
Long of Asc Node:      128.24837 +/-     0.001
Inclination:            26.17324 +/-     0.000
Eccentricity:         0.41415172 +/-    0.0001
Semi-Major Axis:     62.50099206 +/-    0.0124
Time of Perihelion: 2454222.2431 +/-       5.1
Perihelion:          36.61609842 +/-    0.0107
Aphelion:            88.38588570 +/-    0.0192
Period (y)              494.1270 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.35958350 +/-    0.0006
Ecliptic Y           13.79077213 +/-    0.0002
Ecliptic Z          -15.91410929 +/-    0.0003
Ecliptic XDOT        -0.00131637 +/-    0.0000
Ecliptic YDOT         0.00306125 +/-    0.0000
Ecliptic ZDOT        -0.00042333 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.94791714 +/-    0.0005
Geocenter to KBO     36.10473702 +/-    0.0007
# Hcoef:  7.98

The following table shows the complete astrometric record for 14SK404. 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 (14SK404) followed by the observatory code and reference code for the source of the astrometry.

2014 09  27.27249  02 11 11.705  -14 40 05.40  23.6i 14SK404   W84  C~55SA      
2014 11  28.22632  02 06 12.101  -15 02 39.63  24.1g 14SK404   W84  C~55SA      
2014 12  13.18199  02 05 17.682  -14 59 38.66  22.7z 14SK404   W84  C~55SA      
2014 12  15.17567  02 05 11.754  -14 58 58.96  23.6r 14SK404   W84  C~55SA      
2014 12  20.16047  02 04 58.455  -14 57 04.07  23.4i 14SK404   W84  C~55SA      
2015 12  14.18278  02 12 52.860  -14 27 42.33  24.0r 14SK404   W84  C~55SA      
2015 12  14.18415  02 12 52.871  -14 27 42.18  23.9g 14SK404   W84  C~55SA      
2016 08  29.39689  02 27 48.514  -13 12 16.64  23.6i 14SK404   W84  C~55SA      
2016 08  29.39827  02 27 48.507  -13 12 16.38  23.8r 14SK404   W84  C~55SA      
2016 09  30.25292  02 26 11.610  -13 36 25.84  24.0r 14SK404   W84  C~55SA      
2016 09  30.25429  02 26 11.607  -13 36 26.02  23.4i 14SK404   W84  C~55SA      
2016 09  30.25566  02 26 11.598  -13 36 25.76  25.0g 14SK404   W84  C~55SA      
2017 10  21.30353  02 32 04.854  -13 15 02.78  23.3r 14SK404   W84  C~55SA      
2017 10  30.29869  02 31 19.030  -13 19 05.85  23.2i 14SK404   W84  C~55SA      
2017 12  14.08551  02 27 52.368  -13 22 00.60  23.4r 14SK404   W84  C~55SA      
2017 12  14.08688  02 27 52.398  -13 22 00.81  23.3i 14SK404   W84  C~55SA      
2018 10  20.33424  02 39 36.773  -12 39 53.24  23.3i 14SK404   W84  C~55SA      
2018 10  20.33561  02 39 36.783  -12 39 53.50  24.3r 14SK404   W84  C~55SA      

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     0.11       0.00    -0.26
     2   0.1696  -4537.38    -0.13     348.75    -0.17
     3   0.2106  -5204.81     0.01     806.47     0.24
     4   0.2160  -5270.24     0.04     874.91     0.13
     5   0.2297  -5407.61    -0.05    1052.45    -0.07
     6   1.2126   1639.83    -0.11     141.04     0.04
     7   1.2126   1640.04     0.15     141.11     0.07
     8   1.9223  15453.28    -0.05    -654.38    -0.19
     9   1.9223  15453.28     0.02    -654.10     0.14
    10   2.0095  13578.69     0.02   -1443.13     0.04
    11   2.0095  13578.58     0.01   -1443.28    -0.09
    12   2.0095  13578.56     0.09   -1442.99     0.22
    13   3.0665  18857.91    -0.26   -2276.59     0.17
    14   3.0911  18141.44    -0.16   -2237.09    -0.18
    15   3.2137  15277.23    -0.08   -1215.82     0.21
    16   3.2137  15277.56     0.30   -1216.19    -0.20
    17   4.0631  25841.88    -0.02   -2966.12     0.10
    18   4.0631  25841.92     0.12   -2966.42    -0.20

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.

14SK404    quality flag:3

Type:          3:1EE     3:1EE     3:1EE
Type:                              3:1II

axisobj        63.441    63.484    63.399
ecceobj         0.423     0.423     0.423
incobj         26.156    26.156    26.156
qmin           36.079    36.078    36.079
qmax           90.348    90.369    90.328
amean          62.630    62.630    62.629
amin           61.909    61.908    61.925
amax           63.652    63.639    63.683
emean           0.370     0.374     0.333
emin            0.335     0.340     0.237
emax            0.423     0.423     0.423
imean          27.160    26.956    28.554
imin           24.584    24.588    24.580
imax           28.448    28.303    31.643
excite_mean     0.588     0.588     0.585
fracstop        1.000     1.000     1.000
cjmean          2.864     2.864     2.864

libcent 0        75.1      74.8      67.8
libamp  0        30.2      29.7      47.7
libcent 1      -180.0    -180.0     168.1
libamp  1      -180.0    -180.0      59.1
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       194.3     189.7     222.4
kozaiamp         54.2      60.1      16.2