Orbit Fit and Astrometric record for 472231

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: 472231    
# Created Sun Dec 17 02:36:52 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   67 observations of   67
# Arc:   6.07y
# First observation: 2011/04/03
#  Last observation: 2017/04/27
# Chi-squared of fit:    74.77 DOF:  128 RMS:  0.19
# Min/Max residuals:    -0.37    1.10
# Exact a, adot, b, bdot, g, gdot:
  1.614735E-05  2.623568E-02  1.089511E-07  9.000797E-04  2.550696E-02 -5.063946E-04
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.205196 -154.456773    0.215963   -0.037757   -0.979504  2455654.946186
# Heliocentric elements and errors
Epoch:              2455654.5000  =  2011/04/03
Mean Anomaly:          342.77801 +/-     0.000
Argument of Peri:      332.42813 +/-     0.000
Long of Asc Node:      252.90739 +/-     0.000
Inclination:             2.90925 +/-     0.000
Eccentricity:         0.07794815 +/-    0.0000
Semi-Major Axis:     43.38576288 +/-    0.0000
Time of Perihelion: 2460647.9428 +/-       0.0
Perihelion:          40.00392295 +/-    0.0000
Aphelion:            46.76760282 +/-    0.0000
Period (y)              285.7782 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -36.32011390 +/-    0.0000
Ecliptic Y          -17.12088719 +/-    0.0000
Ecliptic Z           -1.50851747 +/-    0.0000
Ecliptic XDOT         0.00125827 +/-    0.0000
Ecliptic YDOT        -0.00251303 +/-    0.0000
Ecliptic ZDOT         0.00009866 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.18149265 +/-    0.0000
Geocenter to KBO     39.20502922 +/-    0.0000
# Hcoef:  5.57

The following table shows the complete astrometric record for 472231. 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 (472231) followed by the observatory code and reference code for the source of the astrometry.

2011 04  03.44542  13 31 25.185  -11 55 43.37  21.5w 472231    F51  C~1vXJ      
2011 04  03.44674  13 31 25.175  -11 55 43.37  21.5w 472231    F51  C~1vXJ      
2011 04  03.45933  13 31 25.120  -11 55 43.06  21.5w 472231    F51  C~1vXJ      
2011 04  03.46065  13 31 25.113  -11 55 43.02  21.5w 472231    F51  C~1vXJ      
2011 04  03.47516  13 31 25.041  -11 55 42.68  21.5w 472231    F51  C~1vXJ      
2011 04  03.47648  13 31 25.032  -11 55 42.66  21.4w 472231    F51  C~1vXJ      
2011 04  03.48904  13 31 24.976  -11 55 42.43  21.5w 472231    F51  C~1vXJ      
2011 04  03.49036  13 31 24.973  -11 55 42.28  21.5w 472231    F51  C~1vXJ      
2011 04  03.50925  13 31 24.876  -11 55 41.85  21.7g 472231    F51  C~1vXJ      
2011 04  03.52046  13 31 24.810  -11 55 41.36  21.1r 472231    F51  C~1vXJ      
2011 04  03.52106  13 31 24.803  -11 55 41.39  21.7r 472231    F51  C~1vXJ      
2011 04  03.53090  13 31 24.761  -11 55 41.22  21.6r 472231    F51  C~1vXJ      
2011 04  03.53149  13 31 24.769  -11 55 40.99  21.4r 472231    F51  C~1vXJ      
2011 04  28.34431  13 29 27.589  -11 44 09.18  21.5w 472231    F51  C~1vXJ      
2011 04  28.35840  13 29 27.530  -11 44 08.61  21.6w 472231    F51  C~1vXJ      
2011 04  28.37264  13 29 27.457  -11 44 08.32  21.6w 472231    F51  C~1vXJ      
2011 04  28.38676  13 29 27.390  -11 44 07.97  21.5w 472231    F51  C~1vXJ      
2013 04  09.45093  13 42 32.190  -12 52 19.90  21.5w 472231    F51  C~1vXJ      
2013 04  09.46560  13 42 32.126  -12 52 19.37  21.5w 472231    F51  C~1vXJ      
2013 04  09.48029  13 42 32.053  -12 52 19.03  21.6w 472231    F51  C~1vXJ      
2013 04  09.49491  13 42 31.981  -12 52 18.58  21.7w 472231    F51  C~1vXJ      
2013 05  04.36050  13 40 34.176  -12 40 56.18  21.5w 472231    F51  C~1vXK      
2013 05  04.39318  13 40 34.025  -12 40 55.15  21.5w 472231    F51  C~1vXK      
2013 05  04.40950  13 40 33.952  -12 40 55.04  21.3w 472231    F51  C~1vXK      
2014 02  25.57392  13 51 09.625  -13 35 46.86  21.9w 472231    F51  C~1vXK      
2014 02  25.58654  13 51 09.599  -13 35 46.53  21.7w 472231    F51  C~1vXK      
2014 02  25.59914  13 51 09.565  -13 35 46.45  21.5w 472231    F51  C~1vXK      
2014 02  25.61174  13 51 09.530  -13 35 46.32  21.8w 472231    F51  C~1vXK      
2014 03  28.23411  13 49 21.148  -13 26 37.31        472231    807  C~1Reu      
2014 03  28.23412  13 49 21.14   -13 26 38.0   21.9V 472231    W84  C~2Jbr      
2014 03  28.29677  13 49 20.863  -13 26 35.99  21.4r 472231    807  C~1Reu      
2014 03  28.29678  13 49 20.86   -13 26 36.5         472231    W84  C~2Jbr      
2014 03  28.36227  13 49 20.579  -13 26 34.52        472231    807  C~1Reu      
2014 03  28.36228  13 49 20.56   -13 26 35.0         472231    W84  C~2Jbr      
2014 05  02.30070  13 46 36.005  -13 11 15.81  21.5r 472231    304  C~1Reu      
2014 05  02.34425  13 46 35.803  -13 11 14.53        472231    304  C~1Reu      
2014 05  20.33258  13 45 17.265  -13 03 25.93  21.7w 472231    F51  C~1vXK      
2014 05  20.34554  13 45 17.217  -13 03 25.75  21.7w 472231    F51  C~1vXK      
2014 05  20.35848  13 45 17.164  -13 03 25.25  21.7w 472231    F51  C~1vXK      
2014 05  20.37140  13 45 17.105  -13 03 25.07  21.9w 472231    F51  C~1vXK      
2014 05  28.28524  13 44 47.288  -13 00 19.33  21.7w 472231    F51  C~1vXK      
2014 05  28.29735  13 44 47.255  -13 00 18.87  21.9w 472231    F51  C~1vXK      
2014 05  28.30946  13 44 47.208  -13 00 18.80  21.8w 472231    F51  C~1vXK      
2014 05  28.32158  13 44 47.170  -13 00 18.49  21.7w 472231    F51  C~1vXK      
2014 06  27.27878  13 43 34.107  -12 51 54.74  22.0w 472231    F51  C~1vXK      
2014 06  27.29113  13 43 34.102  -12 51 54.50  21.7w 472231    F51  C~1vXK      
2014 06  27.30351  13 43 34.074  -12 51 54.42  21.9w 472231    F51  C~1vXK      
2014 06  27.31585  13 43 34.056  -12 51 54.40  22.2w 472231    F51  C~1vXK      
2015 01  01.64374  13 56 45.240  -14 00 13.74  21.8w 472231    F51  C~1vXK      
2015 01  01.64837  13 56 45.241  -14 00 14.04  21.8w 472231    F51  C~1vXK      
2015 01  01.65302  13 56 45.252  -14 00 13.56  21.7w 472231    F51  C~1vXK      
2015 01  01.65766  13 56 45.259  -14 00 14.04  21.6w 472231    F51  C~1vXK      
2015 01  26.61004  13 57 29.264  -14 05 15.23  21.9w 472231    F51  C~1vXK      
2015 01  26.62202  13 57 29.275  -14 05 15.43  21.9w 472231    F51  C~1vXK      
2015 01  26.63397  13 57 29.265  -14 05 15.65  21.8w 472231    F51  C~1vXK      
2015 01  26.64596  13 57 29.274  -14 05 15.69  21.7w 472231    F51  C~1vXK      
2015 03  18.52118  13 55 55.548  -13 58 42.34  21.7w 472231    F51  C~1vXK      
2015 03  18.53391  13 55 55.498  -13 58 41.96  21.9w 472231    F51  C~1vXK      
2015 03  18.54667  13 55 55.447  -13 58 41.78  21.6w 472231    F51  C~1vXK      
2015 03  18.55940  13 55 55.401  -13 58 41.40  21.7w 472231    F51  C~1vXK      
2015 03  21.32138  13 55 44.584  -13 57 45.69        472231    304  C~1Reu      
2015 03  21.36526  13 55 44.396  -13 57 44.96        472231    304  C~1Reu      
2015 04  18.33822  13 53 37.734  -13 46 30.15        472231    304  C~1Reu      
2015 04  19.32283  13 53 32.964  -13 46 03.91        472231    304  C~1Reu      
2017 04  27.41410  14 04 45.195  -14 38 27.85  21.8w 472231    F51  C~2F7X      
2017 04  27.42713  14 04 45.093  -14 38 27.20  21.8w 472231    F51  C~2F7X      
2017 04  27.44017  14 04 45.067  -14 38 27.14  21.5w 472231    F51  C~2F7X      

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    -0.21       0.00     1.10
  2   0.0000      0.00     0.06       0.00     0.02
  3   0.0000      0.00     0.13       0.00    -0.00
  4   0.0000      0.00     0.12       0.00     0.00
  5   0.0001      0.00     0.07       0.00    -0.04
  6   0.0001      0.00     0.03       0.00    -0.06
  7   0.0001      0.00     0.08       0.00    -0.16
  8   0.0001      0.00     0.13       0.00    -0.05
  9   0.0002      0.00     0.02       0.00    -0.12
 10   0.0002      0.00    -0.17       0.00     0.07
 11   0.0002      0.00    -0.23       0.00     0.02
 12   0.0002      0.00    -0.16       0.00    -0.07
 13   0.0002      0.00    -0.00       0.00     0.14
 14   0.0682      0.00     0.17       0.00    -0.10
 15   0.0682      0.00     0.27       0.00     0.08
 16   0.0682      0.00     0.18       0.00    -0.03
 17   0.0683      0.00     0.17       0.00    -0.08
 18   2.0178      0.00     0.00       0.00    -0.11
 19   2.0179      0.00     0.11       0.00     0.03
 20   2.0179      0.00     0.08       0.00    -0.02
 21   2.0179      0.00     0.06       0.00     0.04
 22   2.0860      0.00     0.08       0.00    -0.06
 23   2.0861      0.00     0.09       0.00     0.08
 24   2.0861      0.00     0.13       0.00    -0.25
 25   2.8997      0.00     0.06       0.00    -0.15
 26   2.8998      0.00     0.16       0.00     0.03
 27   2.8998      0.00     0.13       0.00    -0.03
 28   2.8998      0.00     0.09       0.00    -0.04
 29   2.9837      0.00     0.15       0.00     0.58
 30   2.9837      0.00     0.03       0.00    -0.11
 31   2.9839      0.00     0.08       0.00     0.43
 32   2.9839      0.00     0.03       0.00    -0.08
 33   2.9840      0.00     0.20       0.00     0.36
 34   2.9840      0.00    -0.08       0.00    -0.12
 35   3.0797      0.00     0.10       0.00     0.19
 36   3.0798      0.00     0.14       0.00     0.27
 37   3.1291      0.00     0.06       0.00    -0.11
 38   3.1291      0.00     0.13       0.00    -0.25
 39   3.1291      0.00     0.13       0.00    -0.07
 40   3.1292      0.00     0.03       0.00    -0.20
 41   3.1508      0.00    -0.14       0.00    -0.16
 42   3.1509      0.00     0.02       0.00     0.03
 43   3.1509      0.00    -0.02       0.00    -0.17
 44   3.1509      0.00     0.07       0.00    -0.13
 45   3.2329      0.00    -0.14       0.00    -0.18
 46   3.2330      0.00     0.03       0.00    -0.07
 47   3.2330      0.00    -0.15       0.00    -0.12
 48   3.2330      0.00    -0.18       0.00    -0.23
 49   3.7487      0.00     0.14       0.00    -0.16
 50   3.7487      0.00    -0.05       0.00    -0.37
 51   3.7487      0.00    -0.08       0.00     0.19
 52   3.7487      0.00    -0.18       0.00    -0.20
 53   3.8170      0.00    -0.08       0.00     0.16
 54   3.8170      0.00     0.00       0.00     0.03
 55   3.8171      0.00    -0.23       0.00    -0.13
 56   3.8171      0.00    -0.17       0.00    -0.10
 57   3.9564      0.00     0.07       0.00    -0.26
 58   3.9564      0.00     0.07       0.00    -0.12
 59   3.9565      0.00     0.06       0.00    -0.19
 60   3.9565      0.00     0.12       0.00    -0.06
 61   3.9641      0.00     0.36       0.00     0.40
 62   3.9642      0.00     0.22       0.00     0.23
 63   4.0408      0.00     0.01       0.00     0.27
 64   4.0435      0.00    -0.17       0.00     0.24
 65   6.0670      0.00     0.24       0.00    -0.12
 66   6.0670      0.00    -0.33       0.00     0.19
 67   6.0671      0.00     0.25       0.00    -0.10

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.

472231    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.300    43.300    43.300
ecceobj         0.076     0.076     0.076
incobj          2.911     2.911     2.911
qmin           39.342    39.345    39.317
qmax           48.139    48.149    48.213
amean          43.620    43.620    43.620
amin           43.272    43.269    43.282
amax           43.982    43.982    43.982
emean           0.075     0.075     0.075
emin            0.054     0.054     0.055
emax            0.096     0.095     0.096
imean           4.867     4.866     4.867
imin            4.004     4.007     4.003
imax            5.696     5.697     5.696
excite_mean     0.114     0.114     0.114
fracstop        1.000     1.000     1.000
cjmean          3.081     3.081     3.081

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       176.7     176.5     176.8
kozaiamp        180.0     180.0     179.9