Orbit Fit and Astrometric record for 14DU143

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: 14DU143   
# Created Tue Oct 23 01:09:25 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   17 observations of   17
# Arc:   8.24y
# First observation: 2006/01/06
#  Last observation: 2014/04/04
# Chi-squared of fit:    14.79 DOF:   28 RMS:  0.16
# Min/Max residuals:    -0.47    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.465188E-05  2.227291E-02  2.923113E-06  4.431704E-03  2.463740E-02 -9.219345E-04
# Covariance matrix:
  4.8417E-13 -1.5190E-13  1.3441E-14 -1.8794E-14 -9.0681E-14 -5.0467E-13
 -1.5190E-13  2.8056E-13 -3.9112E-14  4.4597E-14  5.7153E-13  1.3140E-12
  1.3441E-14 -3.9112E-14  4.3663E-13 -6.5891E-14 -8.2314E-14 -1.9020E-13
 -1.8794E-14  4.4597E-14 -6.5891E-14  1.8033E-14  7.7030E-14  2.2578E-13
 -9.0681E-14  5.7153E-13 -8.2314E-14  7.7030E-14  1.7158E-12  2.5078E-12
 -5.0467E-13  1.3140E-12 -1.9020E-13  2.2578E-13  2.5078E-12  6.5265E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.448245  178.221538    0.938923    0.038466   -0.293404  2453742.014348
# Heliocentric elements and errors
Epoch:              2453742.5000  =  2006/01/07
Mean Anomaly:          212.89056 +/-     0.070
Argument of Peri:      187.48130 +/-     0.056
Long of Asc Node:      144.39562 +/-     0.001
Inclination:            13.57350 +/-     0.000
Eccentricity:         0.13062999 +/-    0.0001
Semi-Major Axis:     36.71172816 +/-    0.0057
Time of Perihelion: 2486942.9309 +/-      19.3
Perihelion:          31.91607556 +/-    0.0057
Aphelion:            41.50738076 +/-    0.0070
Period (y)              222.4413 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -40.49733271 +/-    0.0021
Ecliptic Y            2.19386352 +/-    0.0001
Ecliptic Z            5.26166251 +/-    0.0003
Ecliptic XDOT         0.00009127 +/-    0.0000
Ecliptic YDOT        -0.00248532 +/-    0.0000
Ecliptic ZDOT         0.00047504 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.89664037 +/-    0.0021
Geocenter to KBO     40.58874341 +/-    0.0022
# Hcoef:  6.63

The following table shows the complete astrometric record for 14DU143. 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 (14DU143) followed by the observatory code and reference code for the source of the astrometry.

2006 01  06.513594 12 05 23.64   +07 32 14.9   22.7V 14DU143   645  C~2hhy      
2006 01  06.514423 12 05 23.65   +07 32 14.9   22.4V 14DU143   645  C~2hhy      
2006 01  06.516911 12 05 23.64   +07 32 14.9   23.5V 14DU143   645  C~2hhy      
2011 03  13.42472  12 28 19.443  +06 37 21.54  22.3i 14DU143   F51  C~1w3v      
2011 03  13.43722  12 28 19.387  +06 37 21.89  22.4i 14DU143   F51  C~1w3v      
2011 04  01.39761  12 26 51.737  +06 47 54.62  22.7w 14DU143   F51  C~1w3v      
2012 02  28.54015  12 34 30.760  +06 11 18.87  22.9w 14DU143   F51  C~1w3v      
2012 02  28.55459  12 34 30.695  +06 11 19.55  23.0w 14DU143   F51  C~1w3v      
2013 04  11.38355  12 36 36.853  +06 16 18.69  22.6w 14DU143   F51  C~1w3v      
2013 04  11.39722  12 36 36.778  +06 16 19.53  22.5w 14DU143   F51  C~1w3v      
2013 04  11.41101  12 36 36.733  +06 16 19.79  22.3w 14DU143   F51  C~1w3w      
2014 02  26.56918  12 45 10.448  +05 32 52.53  22.7w 14DU143   F51  C~1w3w      
2014 02  26.58140  12 45 10.399  +05 32 52.70  22.6w 14DU143   F51  C~1w3w      
2014 02  27.49254  12 45 07.014  +05 33 24.53  22.7w 14DU143   F51  C~1w3w      
2014 02  27.50481  12 45 06.958  +05 33 24.91  22.7w 14DU143   F51  C~1w3w      
2014 02  27.52945  12 45 06.875  +05 33 25.73  22.5w 14DU143   F51  C~1w3w      
2014 04  04.37674  12 42 29.177  +05 53 52.12  22.3w 14DU143   F51  C~1w3w      

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    -0.07       0.00     0.01
  2   0.0000      0.00     0.08       0.00    -0.00
  3   0.0000      0.00    -0.04       0.00    -0.05
  4   5.1798      0.00     0.13       0.00     0.16
  5   5.1798      0.00     0.15       0.00     0.07
  6   5.2317      0.00    -0.24       0.00    -0.47
  7   6.1438      0.00     0.12       0.00     0.09
  8   6.1438      0.00     0.01       0.00     0.26
  9   7.2604      0.00    -0.04       0.00    -0.18
 10   7.2605      0.00    -0.21       0.00     0.28
 11   7.2605      0.00     0.08       0.00     0.15
 12   8.1398      0.00     0.05       0.00     0.18
 13   8.1398      0.00     0.01       0.00    -0.07
 14   8.1423      0.00    -0.02       0.00     0.04
 15   8.1423      0.00    -0.16       0.00    -0.01
 16   8.1424      0.00     0.01       0.00    -0.05
 17   8.2406      0.00     0.15       0.00    -0.41

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.

14DU143    quality flag:3

Type:           4:3E      4:3E      4:3E

axisobj        36.404    36.404    36.404
ecceobj         0.138     0.138     0.138
incobj         13.607    13.607    13.607
qmin           30.906    30.906    30.905
qmax           42.524    42.496    42.377
amean          36.477    36.477    36.477
amin           36.121    36.127    36.116
amax           36.886    36.879    36.878
emean           0.126     0.126     0.126
emin            0.101     0.101     0.101
emax            0.153     0.152     0.152
imean          13.205    13.205    13.204
imin           11.414    11.414    11.414
imax           15.090    15.090    15.089
excite_mean     0.261     0.261     0.261
fracstop        1.000     1.000     1.000
cjmean          2.951     2.951     2.951

libcent 0       178.9     179.1     178.5
libamp  0        79.5      79.7      79.0
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       175.4     175.4     175.5
kozaiamp        180.0     179.9     180.0