Orbit Fit and Astrometric record for 469438

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: 469438    
# Created Tue Dec 12 02:36:52 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   70 observations of   70
# Arc:  12.96y
# First observation: 2002/04/06
#  Last observation: 2015/03/23
# Chi-squared of fit:   231.58 DOF:  134 RMS:  0.32
# Min/Max residuals:    -1.42    1.21
# Exact a, adot, b, bdot, g, gdot:
  1.518628E-05  2.559297E-02 -2.619441E-06 -6.820592E-05  2.506275E-02 -1.689565E-03
# 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
    2.213885  153.212696   -0.685126    0.028258   -0.731844  2452370.522113
# Heliocentric elements and errors
Epoch:              2452370.5000  =  2002/04/06
Mean Anomaly:          333.02366 +/-     0.000
Argument of Peri:      127.46837 +/-     0.000
Long of Asc Node:       59.11827 +/-     0.000
Inclination:             2.18188 +/-     0.000
Eccentricity:         0.09391987 +/-    0.0000
Semi-Major Axis:     44.25159994 +/-    0.0000
Time of Perihelion: 2460427.4824 +/-       0.0
Perihelion:          40.09549562 +/-    0.0000
Aphelion:            48.40770427 +/-    0.0000
Period (y)              294.3755 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -36.55354722 +/-    0.0000
Ecliptic Y           17.69207726 +/-    0.0000
Ecliptic Z            1.54119794 +/-    0.0000
Ecliptic XDOT        -0.00110399 +/-    0.0000
Ecliptic YDOT        -0.00258009 +/-    0.0000
Ecliptic ZDOT        -0.00001436 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.63925621 +/-    0.0000
Geocenter to KBO     39.89992561 +/-    0.0000
# Hcoef:  6.34

The following table shows the complete astrometric record for 469438. 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 (469438) followed by the observatory code and reference code for the source of the astrometry.

2002 04  06.02137  10 23 51.47   +12 23 26.9   21.1R 469438    807  Cf5153      
2002 04  06.11054  10 23 51.18   +12 23 28.2         469438    807  Cf5153      
2002 04  07.01038  10 23 48.18   +12 23 43.3         469438    807  Cf5154      
2002 04  07.09886  10 23 47.86   +12 23 44.4         469438    807  Cf5154      
2002 04  07.99899  10 23 44.95   +12 23 59.1         469438    807  Cf5154      
2002 04  08.07532  10 23 44.71   +12 24 00.3         469438    807  Cf5154      
2002 04  08.99446  10 23 41.79   +12 24 14.4         469438    807  Cf5154      
2002 04  09.08322  10 23 41.49   +12 24 15.7         469438    807  Cn6494      
2003 03  31.155945 10 29 49.44   +11 48 59.3   22.4V 469438    645  C~1PqY      
2003 03  31.156774 10 29 49.44   +11 48 59.3   22.8V 469438    645  C~1PqY      
2003 03  31.159262 10 29 49.43   +11 48 59.4   24.0V 469438    645  C~1PqY      
2004 02  17.12059  10 38 37.73   +10 57 31.1   21.4R 469438    493  Cs6855      
2004 02  17.12751  10 38 37.68   +10 57 31.1   21.6R 469438    493  Cs6855      
2004 02  17.13444  10 38 37.67   +10 57 31.4   21.3R 469438    493  Cs6855      
2004 02  18.01737  10 38 33.52   +10 57 56.6   21.5R 469438    493  Cs6855      
2004 02  18.06765  10 38 33.28   +10 57 57.9   21.6R 469438    493  Cs6856      
2004 02  18.10836  10 38 33.08   +10 57 59.2   21.4R 469438    493  Cs6856      
2004 02  18.14907  10 38 32.89   +10 58 00.5   21.2R 469438    493  Cs6856      
2004 02  18.18603  10 38 32.72   +10 58 01.4   21.5R 469438    493  Cs6856      
2006 05  24.150941 10 44 42.51   +10 16 54.1         469438    645  C~1PqY      
2006 05  24.151771 10 44 42.51   +10 16 54.1         469438    645  C~1PqY      
2006 05  24.154258 10 44 42.51   +10 16 54.1         469438    645  C~1PqY      
2007 02  21.38988  10 55 03.78   +09 16 35.5   22.1R 469438    695  Cu2959      
2007 02  21.49314  10 55 03.20   +09 16 39.2         469438    695  Cu2959      
2008 03  03.22472  10 59 48.31   +08 46 39.2         469438    695  Cy7588      
2008 03  03.33063  10 59 47.78   +08 46 42.5         469438    695  Cy7588      
2008 04  04.21730  10 57 25.45   +09 00 43.9   22.5R 469438    688  Cy5685      
2008 04  04.32081  10 57 25.01   +09 00 45.9         469438    688  Cy5685      
2008 06  08.02081  10 55 48.33   +09 07 15.3         469438    807  Cz1369      
2008 06  08.06631  10 55 48.38   +09 07 15.0         469438    807  Cz1369      
2008 06  08.97233  10 55 49.63   +09 07 04.2         469438    807  Cz1369      
2008 06  09.04019  10 55 49.69   +09 07 04.0         469438    807  Cz1369      
2011 03  02.14515  11 16 36.524  +06 58 32.75        469438    309  C~0Wz6      
2011 03  02.14699  11 16 36.522  +06 58 33.26        469438    309  C~0Wz6      
2011 03  02.14903  11 16 36.560  +06 58 33.48        469438    309  C~0Wz6      
2011 03  02.15113  11 16 36.521  +06 58 34.29        469438    309  C~0Wz6      
2011 03  02.15311  11 16 36.532  +06 58 33.17        469438    309  C~0Wz6      
2011 03  02.15804  11 16 36.509  +06 58 33.04        469438    309  C~0Wz6      
2011 03  02.17211  11 16 36.443  +06 58 33.64        469438    309  C~0Wz6      
2011 03  02.17391  11 16 36.427  +06 58 33.91        469438    309  C~0Wz6      
2011 03  02.17574  11 16 36.437  +06 58 34.22        469438    309  C~0Wz6      
2011 03  02.17833  11 16 36.409  +06 58 33.97        469438    309  C~0Wz6      
2011 03  02.18133  11 16 36.363  +06 58 34.23        469438    309  C~0Wz6      
2011 03  02.18432  11 16 36.370  +06 58 34.26        469438    309  C~0Wz6      
2011 03  02.18731  11 16 36.354  +06 58 34.38        469438    309  C~0Wz6      
2011 04  02.29940  11 14 13.805  +07 13 11.32  22.7w 469438    F51  C~1vV8      
2011 04  02.31452  11 14 13.766  +07 13 11.47  22.6w 469438    F51  C~1vV8      
2011 04  02.34581  11 14 13.617  +07 13 12.89  22.9w 469438    F51  C~1vV8      
2013 02  06.20844  11 29 21.04   +05 34 27.1   22.6R 469438    304  C~0snY      
2013 02  06.30635  11 29 20.65   +05 34 29.9         469438    304  C~0snY      
2013 02  07.22991  11 29 17.20   +05 34 53.6         469438    304  C~0snY      
2013 02  07.32001  11 29 16.85   +05 34 56.0         469438    304  C~0snY      
2013 02  07.37468  11 29 16.65   +05 34 57.3         469438    304  C~0snY      
2013 02  08.33696  11 29 12.99   +05 35 22.8         469438    304  C~0snY      
2013 02  08.37604  11 29 12.84   +05 35 23.5         469438    304  C~0snY      
2013 02  14.33376  11 28 49.09   +05 38 04.4         469438    304  C~0snY      
2013 02  14.35969  11 28 48.98   +05 38 05.0         469438    304  C~0snY      
2013 02  14.38122  11 28 48.88   +05 38 05.7         469438    304  C~0snY      
2014 02  28.40694  11 33 21.285  +05 07 45.47  22.6w 469438    F51  C~1vV8      
2014 02  28.41930  11 33 21.198  +05 07 46.32  22.3w 469438    F51  C~1vV8      
2014 02  28.44420  11 33 21.085  +05 07 46.85  22.7w 469438    F51  C~1vV8      
2015 01  19.52862  11 41 16.204  +04 14 03.87  22.5w 469438    F51  C~1vV8      
2015 01  19.54212  11 41 16.166  +04 14 04.38  22.7w 469438    F51  C~1vV9      
2015 01  19.56925  11 41 16.101  +04 14 04.41  22.8w 469438    F51  C~1vV9      
2015 02  16.45652  11 39 46.462  +04 24 40.82  22.6w 469438    F51  C~1vV9      
2015 02  16.48238  11 39 46.347  +04 24 41.53  22.8w 469438    F51  C~1vV9      
2015 02  16.49532  11 39 46.295  +04 24 42.07  22.8w 469438    F51  C~1vV9      
2015 03  23.16795  11 37 09.67   +04 41 44.1   22.5R 469438    695  C~1Q3C      
2015 03  23.23218  11 37 09.37   +04 41 45.9         469438    695  C~1Q3C      
2015 03  23.29146  11 37 09.08   +04 41 47.8         469438    695  C~1Q3C      

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    -0.20       0.00     1.21
  2   0.0002      0.00     0.66       0.00     0.22
  3   0.0027      0.00     0.25       0.00     0.56
  4   0.0030      0.00    -0.09       0.00     0.22
  5   0.0054      0.00    -0.03       0.00     0.54
  6   0.0056      0.00     0.13       0.00     0.53
  7   0.0081      0.00     0.05       0.00     0.35
  8   0.0084      0.00    -0.16       0.00     0.28
  9   0.9833      0.00    -0.00       0.00    -0.51
 10   0.9833      0.00     0.04       0.00    -0.53
 11   0.9833      0.00     0.04       0.00    -0.48
 12   1.8675      0.00     0.09       0.00    -0.02
 13   1.8675      0.00    -0.17       0.00    -0.22
 14   1.8675      0.00     0.18       0.00    -0.12
 15   1.8699      0.00     0.07       0.00     0.00
 16   1.8701      0.00     0.08       0.00    -0.12
 17   1.8702      0.00     0.00       0.00     0.02
 18   1.8703      0.00     0.07       0.00     0.17
 19   1.8704      0.00     0.16       0.00     0.02
 20   4.1318      0.00     0.16       0.00    -0.26
 21   4.1318      0.00     0.16       0.00    -0.26
 22   4.1318      0.00     0.16       0.00    -0.24
 23   4.8799      0.00    -0.05       0.00    -0.39
 24   4.8801      0.00    -1.42       0.00     0.32
 25   5.9088      0.00     0.19       0.00    -0.34
 26   5.9091      0.00    -0.10       0.00    -0.14
 27   5.9964      0.00     0.39       0.00    -0.14
 28   5.9967      0.00    -0.04       0.00    -0.40
 29   6.1739      0.00    -0.45       0.00    -0.51
 30   6.1740      0.00    -0.55       0.00    -0.27
 31   6.1765      0.00    -0.36       0.00    -0.31
 32   6.1766      0.00    -0.82       0.00     0.32
 33   8.9038      0.00    -0.35       0.00    -0.51
 34   8.9038      0.00    -0.25       0.00    -0.05
 35   8.9038      0.00     0.46       0.00     0.11
 36   8.9038      0.00     0.03       0.00     0.86
 37   8.9039      0.00     0.33       0.00    -0.32
 38   8.9039      0.00     0.34       0.00    -0.60
 39   8.9039      0.00     0.35       0.00    -0.42
 40   8.9039      0.00     0.24       0.00    -0.20
 41   8.9039      0.00     0.52       0.00     0.05
 42   8.9039      0.00     0.29       0.00    -0.28
 43   8.9039      0.00    -0.19       0.00    -0.11
 44   8.9039      0.00     0.13       0.00    -0.17
 45   8.9039      0.00     0.10       0.00    -0.13
 46   8.9891      0.00    -0.01       0.00    -0.24
 47   8.9892      0.00     0.38       0.00    -0.46
 48   8.9893      0.00     0.16       0.00     0.18
 49  10.8397      0.00     0.30       0.00     0.04
 50  10.8399      0.00     0.02       0.00     0.33
 51  10.8425      0.00     0.04       0.00     0.25
 52  10.8427      0.00    -0.00       0.00     0.31
 53  10.8429      0.00     0.16       0.00     0.20
 54  10.8455      0.00     0.13       0.00     0.60
 55  10.8456      0.00     0.17       0.00     0.27
 56  10.8619      0.00     0.05       0.00     0.07
 57  10.8620      0.00     0.03       0.00    -0.05
 58  10.8620      0.00    -0.11       0.00     0.05
 59  11.8998      0.00     0.28       0.00    -0.25
 60  11.8998      0.00    -0.17       0.00     0.23
 61  11.8999      0.00    -0.14       0.00     0.02
 62  12.7899      0.00     0.14       0.00    -0.16
 63  12.7899      0.00     0.04       0.00     0.13
 64  12.7900      0.00    -0.01       0.00    -0.30
 65  12.8664      0.00    -0.01       0.00    -0.10
 66  12.8664      0.00    -0.13       0.00    -0.10
 67  12.8665      0.00    -0.10       0.00     0.08
 68  12.9614      0.00     0.22       0.00     0.26
 69  12.9616      0.00     0.24       0.00     0.19
 70  12.9617      0.00     0.07       0.00     0.37

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.

469438    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.912    43.911    43.912
ecceobj         0.088     0.088     0.088
incobj          2.182     2.182     2.182
qmin           39.267    39.268    39.264
qmax           49.201    49.200    49.199
amean          44.081    44.081    44.081
amin           43.728    43.723    43.722
amax           44.471    44.467    44.462
emean           0.089     0.089     0.089
emin            0.072     0.072     0.072
emax            0.106     0.106     0.107
imean           1.221     1.221     1.221
imin            0.278     0.279     0.278
imax            1.995     1.995     1.996
excite_mean     0.092     0.092     0.092
fracstop        1.000     1.000     1.000
cjmean          3.092     3.092     3.092

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       174.0     173.8     174.0
kozaiamp        180.0     180.0     180.0