Orbit Fit and Astrometric record for 14WD556

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: 14WD556   
# Created Fri Dec  3 02:12:55 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     38 observations of     38
# Arc:   5.91y
# First observation: 2014/11/21
#  Last observation: 2020/10/20
# Chi-squared of fit:    10.64 DOF:     70 RMS:  0.09
# Min/Max residuals:    -0.28    0.31
# Exact a, adot, b, bdot, g, gdot:
  2.185115E-05  4.415092E-02 -1.476534E-06 -3.238758E-03  3.176485E-02 -4.706358E-03
# Covariance matrix:
  9.9675E-14 -5.5012E-14 -1.2759E-14  6.1662E-15  5.6250E-14 -1.2503E-13
 -5.5012E-14  8.3093E-14  4.0931E-16 -5.2313E-15  1.9255E-14  3.2139E-13
 -1.2759E-14  4.0931E-16  1.0878E-13 -3.1069E-14 -1.5315E-13 -5.2774E-14
  6.1662E-15 -5.2313E-15 -3.1069E-14  1.4995E-14  4.4346E-14 -7.3303E-15
  5.6250E-14  1.9255E-14 -1.5315E-13  4.4346E-14  7.9936E-13  3.7005E-13
 -1.2503E-13  3.2139E-13 -5.2774E-14 -7.3303E-15  3.7005E-13  1.5532E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -31.038969   -4.511400   -0.879769   -0.232249   -0.386305  2456982.644298
# Heliocentric elements and errors
Epoch:              2456982.5000  =  2014/11/21
Mean Anomaly:          357.35884 +/-     0.002
Argument of Peri:      276.95388 +/-     0.004
Long of Asc Node:       93.66671 +/-     0.000
Inclination:            30.76498 +/-     0.000
Eccentricity:         0.58582711 +/-    0.0001
Semi-Major Axis:     76.30460692 +/-    0.0269
Time of Perihelion: 2458768.6477 +/-     127.7
Perihelion:          31.60329921 +/-    0.0152
Aphelion:           121.00591463 +/-    0.0438
Period (y)              666.5525 +/-      0.35
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.40607272 +/-    0.0008
Ecliptic Y           -1.27834434 +/-    0.0001
Ecliptic Z          -16.23253644 +/-    0.0005
Ecliptic XDOT        -0.00019490 +/-    0.0000
Ecliptic YDOT         0.00382730 +/-    0.0000
Ecliptic ZDOT        -0.00002992 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.87829599 +/-    0.0007
Geocenter to KBO     31.48146024 +/-    0.0009
# Hcoef:  8.20

The following table shows the complete astrometric record for 14WD556. 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 (14WD556) followed by the observatory code and reference code for the source of the astrometry.

2014 11  21.14352  00 38 05.177  -29 59 31.66  23.3r 14WD556   W84  C~4yVK      
2014 11  21.14352  00 38 05.18   -29 59 31.7   23.3r 14WD556   W84  C~3cpT      
2014 12  12.08049  00 37 16.763  -29 43 43.36  22.6i 14WD556   W84  C~4yVK      
2014 12  12.08049  00 37 16.77   -29 43 43.4   22.9i 14WD556   W84  C~3cpT      
2014 12  12.08188  00 37 16.770  -29 43 43.38  23.8g 14WD556   W84  C~4yVK      
2014 12  12.08328  00 37 16.762  -29 43 43.26  23.6r 14WD556   W84  C~4yVL      
2014 12  12.08328  00 37 16.76   -29 43 43.3   23.6r 14WD556   W84  C~3cpT      
2014 12  15.07389  00 37 14.386  -29 40 51.22  23.2r 14WD556   W84  C~4yVL      
2014 12  15.07389  00 37 14.39   -29 40 51.2   23.3r 14WD556   W84  C~3cpT      
2014 12  15.07525  00 37 14.379  -29 40 51.13  24.2g 14WD556   W84  C~4yVL      
2014 12  15.07525  00 37 14.38   -29 40 51.1   24.4g 14WD556   W84  C~3cpT      
2014 12  16.07017  00 37 13.858  -29 39 52.13  22.9i 14WD556   W84  C~4yVL      
2014 12  16.07017  00 37 13.86   -29 39 52.1   22.9i 14WD556   W84  C~3cpT      
2014 12  22.09772  00 37 13.534  -29 33 36.47  23.1i 14WD556   W84  C~4yVL      
2014 12  25.04869  00 37 15.168  -29 30 22.14  22.4z 14WD556   W84  C~4yVL      
2014 12  25.04869  00 37 15.16   -29 30 22.2   22.6z 14WD556   W84  C~3cpT      
2015 12  04.05167  00 48 07.372  -28 50 06.05  23.7g 14WD556   W84  C~4yVL      
2016 11  04.10306  01 00 40.992  -27 58 16.20  23.5r 14WD556   W84  C~4yVL      
2016 11  04.10306  01 00 40.99   -27 58 16.2   23.5r 14WD556   W84  C~3cpT      
2016 11  05.24918  01 00 34.744  -27 58 07.06  22.6i 14WD556   W84  C~4yVL      
2016 11  05.24918  01 00 34.74   -27 58 07.0   22.6i 14WD556   W84  C~3cpT      
2016 12  07.15379  00 58 27.244  -27 42 48.25  22.4z 14WD556   W84  C~4yVL      
2016 12  23.07732  00 58 06.836  -27 28 01.37  23.5r 14WD556   W84  C~4yVL      
2016 12  23.07732  00 58 06.84   -27 28 01.4   23.4r 14WD556   W84  C~3cpT      
2016 12  23.07869  00 58 06.826  -27 28 01.24  23.3i 14WD556   W84  C~4yVL      
2016 12  23.07869  00 58 06.83   -27 28 01.2   23.1i 14WD556   W84  C~3cpT      
2017 11  17.16573  01 10 02.055  -26 46 30.84  23.9r 14WD556   W84  C~4yVL      
2017 11  26.04449  01 09 23.795  -26 42 34.94  23.8i 14WD556   W84  C~4yVL      
2017 12  11.14339  01 08 37.677  -26 32 16.12  22.9r 14WD556   W84  C~4yVL      
2017 12  11.14475  01 08 37.663  -26 32 16.11  24.3g 14WD556   W84  C~4yVL      
2018 10  01.34842  01 24 55.710  -25 26 09.08  22.8z 14WD556   W84  C~4yVL      
2018 10  01.34979  01 24 55.697  -25 26 09.03  23.4i 14WD556   W84  C~4yVL      
2018 10  27.19323  01 22 16.138  -25 36 30.53  22.9z 14WD556   W84  C~4yVL      
2018 11  16.05291  01 20 24.220  -25 35 18.05  23.4i 14WD556   W84  C~4yVL      
2018 11  29.14311  01 19 25.693  -25 29 54.22  23.2r 14WD556   W84  C~4yVL      
2018 11  29.14449  01 19 25.688  -25 29 54.19  23.5g 14WD556   W84  C~4yVL      
2020 10  20.264060 01 42 59.902  -23 01 14.91  23.1G 14WD556   G37  C~4Kxw      
2020 10  20.317310 01 42 59.599  -23 01 16.12        14WD556   G37  C~4Kxw      

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    -0.01
     2   0.0000      0.00    -0.00       0.00     0.03
     3   0.0573      0.00    -0.11       0.00     0.04
     4   0.0573      0.00    -0.00       0.00    -0.00
     5   0.0573      0.00     0.02       0.00    -0.06
     6   0.0573      0.00    -0.11       0.00    -0.06
     7   0.0573      0.00    -0.08       0.00    -0.02
     8   0.0655      0.00     0.05       0.00     0.01
     9   0.0655      0.00     0.11       0.00     0.03
    10   0.0655      0.00    -0.03       0.00     0.05
    11   0.0655      0.00    -0.04       0.00     0.02
    12   0.0682      0.00     0.10       0.00     0.02
    13   0.0682      0.00     0.07       0.00    -0.01
    14   0.0847      0.00     0.25       0.00     0.03
    15   0.0928      0.00    -0.09       0.00    -0.01
    16   0.0928      0.00    -0.21       0.00    -0.07
    17   1.0347      0.00     0.19       0.00     0.31
    18   1.9547      0.00     0.04       0.00    -0.03
    19   1.9547      0.00     0.07       0.00    -0.03
    20   1.9579      0.00    -0.02       0.00     0.04
    21   1.9579      0.00     0.04       0.00    -0.02
    22   2.0452      0.00     0.06       0.00    -0.03
    23   2.0888      0.00     0.07       0.00    -0.04
    24   2.0888      0.00     0.01       0.00    -0.01
    25   2.0888      0.00    -0.07       0.00     0.07
    26   2.0888      0.00    -0.13       0.00     0.03
    27   2.9898      0.00    -0.03       0.00    -0.00
    28   3.0141      0.00    -0.09       0.00    -0.20
    29   3.0554      0.00     0.07       0.00     0.06
    30   3.0554      0.00    -0.09       0.00     0.00
    31   3.8609      0.00    -0.04       0.00    -0.05
    32   3.8609      0.00    -0.11       0.00     0.05
    33   3.9317      0.00     0.18       0.00    -0.06
    34   3.9861      0.00     0.13       0.00    -0.07
    35   4.0219      0.00     0.02       0.00     0.00
    36   4.0219      0.00     0.03       0.00    -0.01
    37   5.9141      0.00    -0.28       0.00     0.09
    38   5.9142      0.00     0.22       0.00     0.01

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.

14WD556    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        77.854    77.853    77.855
ecceobj         0.594     0.594     0.594
incobj         30.781    30.781    30.781
qmin           30.764    30.368    30.957
qmax          126.951   129.135   126.760
amean          77.317    77.634    78.099
amin           75.607    75.623    75.606
amax           79.611    80.392    80.145
emean           0.580     0.587     0.571
emin            0.556     0.559     0.558
emax            0.603     0.610     0.595
imean          30.214    29.579    31.171
imin           28.923    28.246    29.128
imax           31.636    31.298    31.937
excite_mean     0.768     0.767     0.771
fracstop        1.000     1.000     1.000
cjmean          2.646     2.648     2.647

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       160.7     167.5     136.4
kozaiamp        179.9     180.0     180.0