Orbit Fit and Astrometric record for 14DC143

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: 14DC143   
# Created Sat Dec 16 02:37:59 2017
# Orbit generated from Bernstein formalism
# Fitting   34 observations of   34
# Arc:   7.17y
# First observation: 2008/02/09
#  Last observation: 2015/04/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.130513   0.217547  -0.049276   0.080606   0.202169   0.000000
# WARNING -- MRQMIN stopped after  19 iterations
# Chi-squared of fit:  9999.99 DOF:   62 RMS: 99.99
# Min/Max residuals: -9287.64 9999.99
# Exact a, adot, b, bdot, g, gdot:
  2.941999E-02  1.053594E-01  1.718991E-03  4.068105E-02  7.862195E-02 -2.502711E-02
# Covariance matrix:
  3.1769E-13 -8.0011E-14  3.9273E-14 -1.8286E-14 -2.5751E-14 -2.2347E-14
 -8.0011E-14  2.7701E-14 -1.8914E-14  8.8159E-15  1.1750E-14  1.0825E-14
  3.9273E-14 -1.8914E-14  2.3795E-13 -4.1399E-14 -1.0044E-14 -9.2134E-15
 -1.8286E-14  8.8159E-15 -4.1399E-14  8.9897E-15  4.4218E-15  4.3187E-15
 -2.5751E-14  1.1750E-14 -1.0044E-14  4.4218E-15  2.4639E-14  3.9981E-15
 -2.2347E-14  1.0825E-14 -9.2134E-15  4.3187E-15  3.9981E-15  5.4370E-15
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.498510  119.921472   -0.332416    0.121744   -0.924396  2454505.764014
# Heliocentric elements and errors
Epoch:              2454500.5000  =  2008/02/04
Mean Anomaly:          222.86482 +/-     0.001
Argument of Peri:      174.72825 +/-     0.000
Long of Asc Node:      104.67199 +/-     0.000
Inclination:            21.61319 +/-     0.000
Eccentricity:         0.30267332 +/-    0.0000
Semi-Major Axis:     10.90420011 +/-    0.0001
Time of Perihelion: 2459510.4746 +/-       0.0
Perihelion:           7.60378968 +/-    0.0001
Aphelion:            14.20461054 +/-    0.0001
Period (y)               36.0080 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -7.36617856 +/-    0.0000
Ecliptic Y           11.37768358 +/-    0.0000
Ecliptic Z            1.68152185 +/-    0.0000
Ecliptic XDOT        -0.00265022 +/-    0.0000
Ecliptic YDOT        -0.00273950 +/-    0.0000
Ecliptic ZDOT         0.00129067 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   13.65795688 +/-    0.0000
Geocenter to KBO     12.72461669 +/-    0.0000
# Hcoef: 11.12

The following table shows the complete astrometric record for 14DC143. 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 (14DC143) followed by the observatory code and reference code for the source of the astrometry.

2008 02  09.26326  08 15 31.53   +27 29 11.7   22.1V 14DC143   G96  C~1vXG      
2008 02  09.26988  08 15 31.39   +27 29 11.9   22.8V 14DC143   G96  C~1vXG      
2008 02  09.27662  08 15 31.32   +27 29 12.6   21.2V 14DC143   G96  C~1vXG      
2008 02  09.28330  08 15 31.24   +27 29 13.0   21.6V 14DC143   G96  C~1vXG      
2012 01  22.45138  10 47 40.888  +26 08 07.72  21.6w 14DC143   F51  C~1vXG      
2012 01  22.46554  10 47 40.754  +26 08 09.61  21.6w 14DC143   F51  C~1vXG      
2012 01  22.47961  10 47 40.632  +26 08 11.21  21.7w 14DC143   F51  C~1vXG      
2012 01  22.49362  10 47 40.501  +26 08 12.80  21.7w 14DC143   F51  C~1vXG      
2012 03  14.30753  10 37 23.462  +27 31 30.58  21.5r 14DC143   F51  C~1vXG      
2012 03  14.31873  10 37 23.317  +27 31 31.12  21.7r 14DC143   F51  C~1vXG      
2012 03  14.33023  10 37 23.178  +27 31 31.94  21.8g 14DC143   F51  C~1vXG      
2012 03  14.34200  10 37 23.024  +27 31 32.27  22.1g 14DC143   F51  C~1vXG      
2014 02  20.54253  11 56 18.807  +23 00 12.41  21.4i 14DC143   F51  C~1vXG      
2014 02  20.55601  11 56 18.661  +23 00 13.65  21.2i 14DC143   F51  C~1vXG      
2014 02  20.56959  11 56 18.531  +23 00 15.51  21.3i 14DC143   F51  C~1vXG      
2014 02  20.58325  11 56 18.372  +23 00 16.88  21.2i 14DC143   F51  C~1vXG      
2014 02  24.39927  11 55 37.603  +23 07 28.97  21.4w 14DC143   F51  C~1vXG      
2014 02  24.41181  11 55 37.466  +23 07 30.48  21.4w 14DC143   F51  C~1vXG      
2014 02  24.42433  11 55 37.321  +23 07 31.83  21.6w 14DC143   F51  C~1vXG      
2014 02  24.43690  11 55 37.187  +23 07 33.22  21.6w 14DC143   F51  C~1vXG      
2014 04  28.36701  11 43 50.207  +24 05 19.69  21.6w 14DC143   F51  C~1vXG      
2014 04  28.37978  11 43 50.114  +24 05 19.65  21.7w 14DC143   F51  C~1vXG      
2014 04  28.39260  11 43 50.023  +24 05 19.36  22.0w 14DC143   F51  C~1vXG      
2015 01  15.54479  12 33 27.109  +19 08 23.69  21.8r 14DC143   F51  C~1vXG      
2015 01  15.55600  12 33 27.099  +19 08 24.79  21.5r 14DC143   F51  C~1vXG      
2015 01  15.57852  12 33 27.113  +19 08 27.20  21.6r 14DC143   F51  C~1vXG      
2015 03  15.52149  12 26 53.141  +20 56 55.40  21.6r 14DC143   F51  C~1vXG      
2015 03  15.53307  12 26 52.992  +20 56 56.52  21.5r 14DC143   F51  C~1vXG      
2015 03  15.54468  12 26 52.859  +20 56 57.59  21.6r 14DC143   F51  C~1vXG      
2015 03  15.55631  12 26 52.715  +20 56 58.79  21.5r 14DC143   F51  C~1vXG      
2015 04  13.29306  12 21 05.877  +21 29 06.84  21.6w 14DC143   F51  C~1vXG      
2015 04  13.30486  12 21 05.748  +21 29 07.30  21.6w 14DC143   F51  C~1vXG      
2015 04  13.31658  12 21 05.603  +21 29 07.83  21.6w 14DC143   F51  C~1vXG      
2015 04  13.32826  12 21 05.469  +21 29 08.20  21.5w 14DC143   F51  C~1vXG      

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 -6063.90       0.00  -352.88
  2   0.0000     -1.86 -6064.35      -0.22  -353.16
  3   0.0000     -2.92 -6063.98       0.25  -352.76
  4   0.0001     -4.05 -6063.68       0.40  -352.67
  5   3.9512 130323.86 10465.55   46323.76  3948.99
  6   3.9513 130320.34 10465.97   46324.44  3949.15
  7   3.9513 130317.21 10466.76   46324.93  3949.15
  8   3.9513 130313.93 10467.38   46325.33  3949.05
  9   4.0932 116986.15 12734.82   45830.85  4181.24
 10   4.0932 116983.51 12735.18   45830.13  4181.16
 11   4.0933 116980.79 12735.54   45829.75  4181.44
 12   4.0933 116978.13 12736.04   45828.74  4181.12
 13   6.0322 227624.93 13557.06   86345.35  2086.70
 14   6.0323 227619.48 13558.75   86344.25  2086.50
 15   6.0323 227613.73 13560.19   86344.12  2087.29
 16   6.0324 227607.77 13561.46   86342.94  2087.03
 17   6.0428 225990.11 13949.06   86134.00  2138.92
 18   6.0428 225984.63 13950.33   86133.37  2139.29
 19   6.0429 225979.12 13951.56   86132.42  2139.35
 20   6.0429 225973.86 13953.08   86131.70  2139.65
 21   6.2152 204078.22 18316.50   78638.87  3693.13
 22   6.2152 204076.01 18316.80   78637.42  3693.77
 23   6.2153 204074.12 18317.41   78635.72  3694.17
 24   6.9330 325241.47 -9287.58  117187.53 -6956.91
 25   6.9330 325238.93 -9287.64  117188.63 -6957.96
 26   6.9331 325234.93 -9286.65  117192.00 -6958.88
 27   7.0945 297301.15  1097.78  115137.52 -6225.87
 28   7.0945 297293.52  1100.06  115135.24 -6225.18
 29   7.0945 297286.58  1103.06  115133.28 -6224.15
 30   7.0946 297279.01  1105.43  115131.22 -6223.24
 31   7.1733 281296.36  6782.53  109288.79 -3923.24
 32   7.1733 281291.05  6784.69  109286.41 -3922.02
 33   7.1733 281285.06  6786.13  109283.76 -3921.10
 34   7.1733 281279.71  6788.19  109281.16 -3920.13

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.

14DC143    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        20.274    20.274    20.274
ecceobj         0.316     0.316     0.316
incobj         20.972    20.972    20.972
qmin           13.737    13.737    13.737
qmax           30.359    26.878    26.784
amean          21.684    19.847    20.260
amin           20.031    19.528    20.031
amax           22.960    20.617    20.442
emean           0.310     0.292     0.307
emin            0.291     0.272     0.290
emax            0.326     0.319     0.319
imean          19.280    19.515    19.632
imin           18.615    18.895    19.355
imax           20.027    20.650    20.144
excite_mean     0.453     0.444     0.456
fracstop        0.022     0.017     0.003
cjmean          2.909     2.977     2.955

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       165.9     149.9      74.0
kozaiamp        102.3     102.0      14.4