Orbit Fit and Astrometric record for 14XW47

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: 14XW47    
# Created Fri Dec  3 02:12:56 2021
# Orbit generated from Bernstein formalism
# Fitting     34 observations of     34
# Arc:   3.79y
# First observation: 2014/12/01
#  Last observation: 2018/09/14
Preliminary a, adot, b, bdot, g, gdot:
   0.000179   0.021298  -0.000008   0.002538   0.023693   0.000000
# Chi-squared of fit:     9.02 DOF:     62 RMS:  0.09
# Min/Max residuals:    -0.20    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.471883E-05  2.163303E-02  2.084086E-06  2.537577E-03  2.345683E-02  6.128939E-03
# Covariance matrix:
  1.9257E-13 -1.7214E-13  6.6203E-15 -1.2333E-14 -7.0033E-14 -1.5242E-12
 -1.7214E-13  3.0025E-13 -1.3415E-14  1.9291E-14  4.2351E-14  3.3606E-12
  6.6203E-15 -1.3415E-14  1.3094E-13 -6.4988E-14 -5.0992E-15 -1.8269E-13
 -1.2333E-14  1.9291E-14 -6.4988E-14  4.9401E-14  1.6455E-14  2.7790E-13
 -7.0033E-14  4.2351E-14 -5.0992E-15  1.6455E-14  1.7545E-13  8.4198E-13
 -1.5242E-12  3.3606E-12 -1.8269E-13  2.7790E-13  8.4198E-13  4.5042E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -27.336159    7.737534   -0.860590   -0.220999   -0.427947  2456992.672668
# Heliocentric elements and errors
Epoch:              2456990.5000  =  2014/11/29
Mean Anomaly:           71.27519 +/-     0.038
Argument of Peri:      179.00708 +/-     0.021
Long of Asc Node:       83.50132 +/-     0.001
Inclination:            27.90906 +/-     0.000
Eccentricity:         0.28965819 +/-    0.0003
Semi-Major Axis:     43.53559408 +/-    0.0087
Time of Perihelion: 2436217.4151 +/-       9.1
Perihelion:          30.92515275 +/-    0.0135
Aphelion:            56.14603541 +/-    0.0164
Period (y)              287.2598 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.88456365 +/-    0.0007
Ecliptic Y            6.01798154 +/-    0.0001
Ecliptic Z          -19.57680672 +/-    0.0003
Ecliptic XDOT         0.00042033 +/-    0.0000
Ecliptic YDOT         0.00260081 +/-    0.0000
Ecliptic ZDOT        -0.00006529 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.06631661 +/-    0.0006
Geocenter to KBO     42.63149751 +/-    0.0008
# Hcoef:  7.14

The following table shows the complete astrometric record for 14XW47. 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 (14XW47) followed by the observatory code and reference code for the source of the astrometry.

2014 12  01.17189  01 13 30.06   -21 56 47.9   22.5z 14XW47    W84  C~3cpY      
2014 12  17.14012  01 12 53.902  -21 49 44.09  23.4i 14XW47    W84  C~4yVR      
2014 12  20.11752  01 12 49.606  -21 48 03.69  23.6r 14XW47    W84  C~4yVR      
2014 12  22.06704  01 12 47.238  -21 46 54.46  23.6r 14XW47    W84  C~4yVR      
2014 12  22.06704  01 12 47.24   -21 46 54.5   24.0r 14XW47    W84  C~3cpY      
2014 12  29.07146  01 12 41.648  -21 42 25.82  22.7z 14XW47    W84  C~4yVR      
2014 12  30.07671  01 12 41.234  -21 41 44.69  23.2z 14XW47    W84  C~4yVR      
2015 08  24.38716  01 24 50.643  -20 47 07.42  23.2r 14XW47    W84  C~4yVR      
2015 08  24.38855  01 24 50.628  -20 47 07.44  23.3i 14XW47    W84  C~4yVR      
2015 10  07.22783  01 21 57.774  -21 13 28.71  23.4i 14XW47    W84  C~4yVR      
2015 10  07.22783  01 21 57.77   -21 13 28.7   23.4i 14XW47    W84  C~3cpY      
2015 10  07.22922  01 21 57.770  -21 13 28.56  23.8r 14XW47    W84  C~4yVR      
2015 11  07.25695  01 19 31.506  -21 20 54.27  23.9r 14XW47    W84  C~4yVR      
2015 11  07.25833  01 19 31.498  -21 20 54.49  23.7i 14XW47    W84  C~4yVR      
2015 11  18.15693  01 18 46.491  -21 20 22.47  23.8r 14XW47    W84  C~4yVR      
2015 11  18.15693  01 18 46.49   -21 20 22.5   23.8r 14XW47    W84  C~3cpY      
2015 11  20.10483  01 18 39.107  -21 20 06.07  23.0z 14XW47    W84  C~4yVR      
2016 08  26.38157  01 29 04.795  -20 08 57.09  23.1r 14XW47    W84  C~4yVR      
2016 08  26.38157  01 29 04.79   -20 08 57.1   23.2r 14XW47    W84  C~3cpY      
2016 10  05.27534  01 26 28.571  -20 32 49.34  23.4i 14XW47    W84  C~4yVR      
2016 10  05.27534  01 26 28.57   -20 32 49.3   23.4i 14XW47    W84  C~3cpY      
2016 10  05.27673  01 26 28.572  -20 32 49.38  23.7r 14XW47    W84  C~4yVR      
2016 10  05.27673  01 26 28.57   -20 32 49.4   23.8r 14XW47    W84  C~3cpY      
2016 10  05.27813  01 26 28.568  -20 32 49.25  24.1g 14XW47    W84  C~4yVR      
2016 11  05.26588  01 24 02.804  -20 41 04.41  22.9i 14XW47    W84  C~4yVR      
2016 11  05.26588  01 24 02.80   -20 41 04.4   23.4i 14XW47    W84  C~3cpY      
2016 11  18.22056  01 23 08.905  -20 40 41.83  22.3z 14XW47    W84  C~4yVR      
2016 11  28.08555  01 22 33.897  -20 38 49.35  23.2r 14XW47    W84  C~4yVR      
2016 11  28.08555  01 22 33.90   -20 38 49.3   23.6r 14XW47    W84  C~3cpY      
2016 12  02.05209  01 22 21.615  -20 37 40.64  24.4g 14XW47    W84  C~4yVR      
2017 11  23.19687  01 27 11.041  -20 00 32.24  23.2i 14XW47    W84  C~4yVR      
2017 11  23.19824  01 27 11.032  -20 00 32.06  23.9r 14XW47    W84  C~4yVR      
2017 11  23.19962  01 27 11.040  -20 00 32.14  24.6g 14XW47    W84  C~4yVR      
2018 09  14.38509  01 36 32.334  -19 01 09.26  23.5r 14XW47    W84  C~4yVR      

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    -0.03       0.00    -0.08
     2   0.0437   -275.77    -0.14     597.37    -0.13
     3   0.0519   -287.38    -0.05     713.67    -0.11
     4   0.0572   -287.89     0.08     790.31    -0.02
     5   0.0572   -287.90     0.07     790.35     0.03
     6   0.0764   -244.59    -0.03    1066.69    -0.04
     7   0.0791   -232.38     0.06    1106.39    -0.01
     8   0.7289  10388.19     0.11    -350.56     0.03
     9   0.7289  10387.99    -0.01    -350.49     0.13
    10   0.8489   7513.45    -0.13    -708.10     0.00
    11   0.8489   7513.49    -0.08    -708.13    -0.03
    12   0.8489   7513.51     0.03    -707.97     0.12
    13   0.9338   5477.09    -0.01    -218.68     0.15
    14   0.9338   5476.89    -0.13    -218.83    -0.04
    15   0.9637   4923.66     0.12      82.50     0.11
    16   0.9637   4923.63     0.09      82.48     0.09
    17   0.9690   4837.69     0.10     141.93    -0.06
    18   1.7364  14620.95     0.05     116.25    -0.05
    19   1.7364  14621.01     0.11     116.23    -0.07
    20   1.8456  12005.13    -0.10    -188.70     0.08
    21   1.8456  12005.12    -0.10    -188.74     0.04
    22   1.8456  12005.09    -0.04    -188.79    -0.01
    23   1.8456  12005.12    -0.01    -188.78    -0.01
    24   1.8456  12005.13     0.10    -188.64     0.12
    25   1.9304   9944.56    -0.02     271.80    -0.07
    26   1.9304   9944.61     0.03     271.77    -0.10
    27   1.9659   9273.64     0.03     624.75     0.20
    28   1.9929   8880.64     0.02     941.53    -0.17
    29   1.9929   8880.58    -0.04     941.50    -0.20
    30   2.0038   8755.43    -0.17    1078.86     0.07
    31   2.9789  13405.77    -0.02    1284.83     0.00
    32   2.9789  13405.74     0.00    1285.05     0.18
    33   2.9789  13405.81     0.13    1284.93     0.01
    34   3.7870  22161.51    -0.03     891.72    -0.17

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.

14XW47    quality flag:3

Type:         7:4EEE    7:4EEE    7:4EEE
Type:         7:4EII    7:4EII    7:4EII

axisobj        43.919    43.944    43.894
ecceobj         0.290     0.291     0.290
incobj         27.918    27.918    27.918
qmin           30.556    30.457    30.562
qmax           57.490    57.540    57.462
amean          43.724    43.724    43.724
amin           43.343    43.329    43.351
amax           44.197    44.203    44.188
emean           0.240     0.233     0.239
emin            0.149     0.131     0.148
emax            0.301     0.302     0.300
imean          27.925    28.046    27.931
imin           26.358    26.364    26.364
imax           29.849    30.142    29.860
excite_mean     0.528     0.528     0.528
fracstop        1.000     1.000     1.000
cjmean          2.754     2.754     2.754

libcent 0       180.8     182.3     182.4
libamp  0        52.2      69.0      51.9
libcent 1       181.8     180.4     183.0
libamp  1        87.6     107.4      90.4
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       184.8     183.8     184.7
kozaiamp         31.5      35.0      31.7