Orbit Fit and Astrometric record for 14DB143

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: 14DB143   
# Created Wed Dec 13 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   29
# Arc:   3.17y
# First observation: 2014/02/28
#  Last observation: 2017/05/02
Preliminary a, adot, b, bdot, g, gdot:
  -0.000844   0.077737   0.000055   0.025890   0.054331   0.000000
# Chi-squared of fit:     8.13 DOF:   52 RMS:  0.09
# Min/Max residuals:    -0.27    0.21
# Exact a, adot, b, bdot, g, gdot:
  2.224613E-05  7.504313E-02  7.586020E-06  2.512627E-02  5.351584E-02  9.275596E-03
# Covariance matrix:
  2.1564E-13 -2.1987E-13  6.7925E-15 -7.2354E-14  1.0202E-13 -7.8969E-13
 -2.1987E-13  9.2015E-13 -9.2453E-14  3.5740E-13  9.2342E-14  4.1043E-12
  6.7925E-15 -9.2453E-14  8.2145E-14 -8.1024E-14 -2.4558E-14 -4.5910E-13
 -7.2354E-14  3.5740E-13 -8.1024E-14  2.2806E-13  4.2775E-14  1.7412E-12
  1.0202E-13  9.2342E-14 -2.4558E-14  4.2775E-14  1.4766E-13  5.3785E-13
 -7.8969E-13  4.1043E-12 -4.5910E-13  1.7412E-12  5.3785E-13  2.0026E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   10.119413 -122.364506    0.966653    0.036589   -0.204480  2456717.054618
# Heliocentric elements and errors
Epoch:              2456710.5000  =  2014/02/22
Mean Anomaly:           44.53686 +/-     0.011
Argument of Peri:      335.86582 +/-     0.015
Long of Asc Node:      207.84619 +/-     0.000
Inclination:            21.34624 +/-     0.000
Eccentricity:         0.09172011 +/-    0.0001
Semi-Major Axis:     20.13704109 +/-    0.0009
Time of Perihelion: 2452627.2215 +/-       1.0
Perihelion:          18.29006955 +/-    0.0015
Aphelion:            21.98401264 +/-    0.0016
Period (y)               90.3653 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -10.77576812 +/-    0.0001
Ecliptic Y          -15.19391343 +/-    0.0001
Ecliptic Z            3.28329334 +/-    0.0000
Ecliptic XDOT         0.00310787 +/-    0.0000
Ecliptic YDOT        -0.00226191 +/-    0.0000
Ecliptic ZDOT         0.00134896 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   18.91433845 +/-    0.0001
Geocenter to KBO     18.68605552 +/-    0.0001
# Hcoef:  8.97

The following table shows the complete astrometric record for 14DB143. 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 (14DB143) followed by the observatory code and reference code for the source of the astrometry.

2014 02  28.55384  15 50 42.036  -09 45 43.59  21.9w 14DB143   F51  C~1vXG      
2014 02  28.56578  15 50 42.030  -09 45 42.96  22.0w 14DB143   F51  C~1vXG      
2014 02  28.57772  15 50 42.064  -09 45 42.39  21.9w 14DB143   F51  C~1vXG      
2014 02  28.58964  15 50 42.060  -09 45 42.06  21.9w 14DB143   F51  C~1vXG      
2014 05  04.45237  15 45 17.826  -08 44 55.08  21.7w 14DB143   F51  C~1vXG      
2014 05  04.46430  15 45 17.718  -08 44 54.18  21.6w 14DB143   F51  C~1vXG      
2014 05  04.47623  15 45 17.603  -08 44 53.68  21.7w 14DB143   F51  C~1vXG      
2014 05  04.48817  15 45 17.492  -08 44 53.01  21.8w 14DB143   F51  C~1vXG      
2014 05  08.42492  15 44 40.530  -08 41 17.22  21.3i 14DB143   F51  C~1vXG      
2014 05  08.43713  15 44 40.402  -08 41 16.51  21.4i 14DB143   F51  C~1vXG      
2014 05  08.44935  15 44 40.299  -08 41 16.01  21.0i 14DB143   F51  C~1vXG      
2014 05  08.46156  15 44 40.173  -08 41 15.34  21.3i 14DB143   F51  C~1vXG      
2014 05  22.41600  15 42 25.530  -08 29 35.94  22.0w 14DB143   F51  C~1vXG      
2014 05  22.42979  15 42 25.407  -08 29 35.31  21.5w 14DB143   F51  C~1vXG      
2014 05  22.44323  15 42 25.254  -08 29 34.88  21.7w 14DB143   F51  C~1vXG      
2014 05  22.45665  15 42 25.128  -08 29 34.24  21.5w 14DB143   F51  C~1vXG      
2014 06  21.34798  15 37 59.747  -08 12 37.89  21.6w 14DB143   F51  C~1vXG      
2014 06  21.36061  15 37 59.648  -08 12 37.65  21.6w 14DB143   F51  C~1vXG      
2014 06  21.37324  15 37 59.550  -08 12 37.23  21.8w 14DB143   F51  C~1vXG      
2014 07  27.28134  15 35 09.223  -08 10 30.57  21.9w 14DB143   F51  C~1vXG      
2014 07  27.29349  15 35 09.200  -08 10 30.97  21.8w 14DB143   F51  C~1vXG      
2014 07  27.30561  15 35 09.186  -08 10 31.00  21.6w 14DB143   F51  C~1vXG      
2014 07  27.31770  15 35 09.157  -08 10 31.23  21.6w 14DB143   F51  C~1vXG      
2015 03  30.58091  16 08 13.796  -08 49 11.36  22.0w 14DB143   F51  C~2HP3      
2015 03  30.59356  16 08 13.750  -08 49 10.43  21.9w 14DB143   F51  C~2HP3      
2015 03  30.60620  16 08 13.694  -08 49 09.86  22.0w 14DB143   F51  C~2HP3      
2015 03  30.61883  16 08 13.628  -08 49 09.00  21.6w 14DB143   F51  C~2HP3      
2017 05  02.38778  16 41 19.67   -07 09 01.0   21.6R 14DB143   G37  C~2HP3      
2017 05  02.45290  16 41 19.14   -07 08 57.8         14DB143   G37  C~2HP3      

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    -0.02       0.00    -0.03
  2   0.0000     -0.22    -0.27       0.60     0.01
  3   0.0001      0.14     0.07       1.26     0.12
  4   0.0001      0.02    -0.09       1.57    -0.13
  5   0.1777  -5481.12     0.04    2515.43    -0.19
  6   0.1777  -5482.89     0.07    2515.96     0.06
  7   0.1777  -5484.66     0.07    2516.07    -0.11
  8   0.1778  -5486.41     0.10    2516.36    -0.10
  9   0.1886  -6069.00     0.06    2606.47     0.06
 10   0.1886  -6071.01    -0.09    2606.74     0.07
 11   0.1886  -6072.61     0.16    2606.90    -0.03
 12   0.1887  -6074.58     0.05    2607.14    -0.04
 13   0.2269  -8179.50     0.01    2848.76     0.11
 14   0.2269  -8181.43     0.21    2848.97     0.15
 15   0.2269  -8183.74    -0.05    2848.89    -0.10
 16   0.2270  -8185.71     0.04    2849.10    -0.06
 17   0.3088 -12262.24    -0.05    2962.78     0.00
 18   0.3088 -12263.74    -0.07    2962.68    -0.03
 19   0.3089 -12265.25    -0.11    2962.77     0.12
 20   0.4072 -14768.29    -0.06    2516.10     0.15
 21   0.4072 -14768.54    -0.03    2515.63    -0.09
 22   0.4073 -14768.73     0.03    2515.55     0.06
 23   0.4073 -14769.10    -0.07    2515.23    -0.03
 24   1.0815  14539.08    -0.05    6598.04    -0.08
 25   1.0816  14538.22     0.05    6598.81     0.13
 26   1.0816  14537.29     0.07    6599.20    -0.04
 27   1.0816  14536.15    -0.11    6599.85     0.05
 28   3.1727  43002.02    -0.02   18501.70     0.10
 29   3.1729  42993.30     0.03   18503.36    -0.13

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.

14DB143    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        20.097    20.103    20.090
ecceobj         0.089     0.089     0.089
incobj         21.377    21.377    21.377
qmin           18.252    18.274    18.310
qmax           22.738    22.494    21.870
amean          20.313    20.262    20.090
amin           20.097    20.103    20.090
amax           20.510    20.384    20.090
emean           0.100     0.097     0.089
emin            0.089     0.089     0.089
emax            0.109     0.104     0.089
imean          21.625    21.642    21.708
imin           21.564    21.604    21.708
imax           21.708    21.708    21.708
excite_mean     0.382     0.381     0.380
fracstop        0.000     0.000     0.000
cjmean          3.008     3.010     3.018

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       338.7     338.0     336.0
kozaiamp          2.6       1.7       0.0