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 Wed Oct 18 01:38:21 2017
# Orbit generated from Bernstein formalism
# Fitting   14 observations of   14
# Arc:   3.06y
# First observation: 2011/03/13
#  Last observation: 2014/04/04
Preliminary a, adot, b, bdot, g, gdot:
  -0.000055   0.023208  -0.000011   0.004291   0.025320   0.000000
# Chi-squared of fit:    13.89 DOF:   22 RMS:  0.18
# Min/Max residuals:    -0.56    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.428009E-05  2.307178E-02  1.890399E-06  4.263290E-03  2.526148E-02 -1.722479E-03
# Covariance matrix:
  4.3883E-13 -3.8656E-13  1.3334E-14 -4.4918E-14 -1.4303E-13 -3.3951E-12
 -3.8656E-13  1.0845E-12 -5.4953E-14  1.8871E-13  1.0817E-12  1.4145E-11
  1.3334E-14 -5.4953E-14  3.6974E-13 -1.5076E-13 -5.9541E-14 -7.7043E-13
 -4.4918E-14  1.8871E-13 -1.5076E-13  1.1054E-13  2.1315E-13  2.6496E-12
 -1.4303E-13  1.0817E-12 -5.9541E-14  2.1315E-13  2.3646E-12  1.5694E-11
 -3.3951E-12  1.4145E-11 -7.7043E-13  2.6496E-12  1.5694E-11  1.9847E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.889011 -176.142330    0.199156    0.151081   -0.966155  2455633.925486
# Heliocentric elements and errors
Epoch:              2455630.5000  =  2011/03/10
Mean Anomaly:          218.94826 +/-     0.212
Argument of Peri:      189.62809 +/-     0.201
Long of Asc Node:      144.49237 +/-     0.002
Inclination:            13.60701 +/-     0.001
Eccentricity:         0.13761525 +/-    0.0003
Semi-Major Axis:     36.41844800 +/-    0.0075
Time of Perihelion: 2487083.0985 +/-      46.3
Perihelion:          31.40671413 +/-    0.0115
Aphelion:            41.43018186 +/-    0.0127
Period (y)              219.7811 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -40.00683166 +/-    0.0024
Ecliptic Y           -2.49920951 +/-    0.0002
Ecliptic Z            6.11694047 +/-    0.0004
Ecliptic XDOT         0.00042204 +/-    0.0000
Ecliptic YDOT        -0.00247163 +/-    0.0000
Ecliptic ZDOT         0.00042768 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.54885434 +/-    0.0023
Geocenter to KBO     39.58595568 +/-    0.0024
# Hcoef:  6.64

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.

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     0.03       0.00     0.16
  2   0.0000     -0.90     0.08      -0.01     0.09
  3   0.0519  -1450.70    -0.08      58.86    -0.56
  4   0.9640   5698.62     0.11     787.81     0.12
  5   0.9641   5697.46    -0.06     788.05     0.24
  6   2.0807   7300.56     0.04    1820.28    -0.18
  7   2.0807   7299.19    -0.29    1820.60     0.17
  8   2.0807   7298.47     0.02    1820.56     0.17
  9   2.9600  15388.46    -0.03    2544.58     0.20
 10   2.9600  15387.72     0.04    2544.44    -0.05
 11   2.9625  15328.28    -0.04    2552.96     0.04
 12   2.9626  15327.35    -0.15    2552.97    -0.06
 13   2.9626  15325.88     0.03    2553.21    -0.03
 14   3.0608  12664.61     0.29    2717.10    -0.30

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        36.406    36.427    36.385
ecceobj         0.138     0.138     0.138
incobj         13.607    13.606    13.607
qmin           30.906    30.681    30.590
qmax           42.416    42.757    42.673
amean          36.477    36.477    36.477
amin           36.104    36.090    36.131
amax           36.875    36.904    36.851
emean           0.125     0.133     0.129
emin            0.101     0.107     0.099
emax            0.152     0.160     0.160
imean          13.291    12.812    12.975
imin           11.395    11.027    11.417
imax           15.277    14.839    14.705
excite_mean     0.262     0.259     0.259
fracstop        1.000     1.000     1.000
cjmean          2.950     2.952     2.953

libcent 0       179.7     178.8     181.8
libamp  0        83.0      97.0      68.5
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       177.6     175.0     177.7
kozaiamp        180.0     180.0     180.0