Orbit Fit and Astrometric record for 492338

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: 492338    
# Created Tue Oct 24 01:36:53 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   51 observations of   52
# Arc:   6.24y
# First observation: 2011/01/30
#  Last observation: 2017/04/26
# Chi-squared of fit:   149.48 DOF:   96 RMS:  0.30
# Min/Max residuals:    -1.46    0.53
# Exact a, adot, b, bdot, g, gdot:
  2.864414E-05  1.431266E-01  3.207802E-06  2.163246E-02  7.641876E-02 -6.334025E-02
# 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
   10.065550  146.695678    0.280506    0.165588   -0.932964  2455591.956486
# Heliocentric elements and errors
Epoch:              2455592.5000  =  2011/01/31
Mean Anomaly:          345.66941 +/-     0.000
Argument of Peri:      114.80269 +/-     0.000
Long of Asc Node:       98.25012 +/-     0.000
Inclination:            12.68521 +/-     0.000
Eccentricity:         0.62848275 +/-    0.0000
Semi-Major Axis:     28.90344597 +/-    0.0000
Time of Perihelion: 2457851.8546 +/-       0.0
Perihelion:          10.73812864 +/-    0.0000
Aphelion:            47.06876329 +/-    0.0000
Period (y)              155.3934 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -11.40228481 +/-    0.0000
Ecliptic Y            7.82850559 +/-    0.0000
Ecliptic Z            2.28711039 +/-    0.0000
Ecliptic XDOT        -0.00083606 +/-    0.0000
Ecliptic YDOT        -0.00558077 +/-    0.0000
Ecliptic ZDOT         0.00036649 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   14.01903912 +/-    0.0000
Geocenter to KBO     13.08599449 +/-    0.0000
# Hcoef:  9.93

The following table shows the complete astrometric record for 492338. 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 (492338) followed by the observatory code and reference code for the source of the astrometry.

2011 01  30.45572  10 10 24.67   +22 02 57.6   21.4V 492338    G96  C~2FwK      
2011 01  30.46318  10 10 24.56   +22 02 58.1   21.6V 492338    G96  C~2FwK      
2011 01  30.47072  10 10 24.45   +22 02 58.6   21.8V 492338    G96  C~2FwK      
2011 01  30.47824  10 10 24.38   +22 02 59.3   20.9V 492338    G96  C~2FwK      
2014 03  12.33480  12 04 15.25   +14 15 23.4   20.4V 492338    G96  C~12DW      
2014 03  12.33940  12 04 15.20   +14 15 23.9   20.7V 492338    G96  C~12DW      
2014 03  12.34398  12 04 15.11   +14 15 24.5   20.6V 492338    G96  C~12DW      
2014 03  12.34856  12 04 15.05   +14 15 25.0   20.1V 492338    G96  C~12DW      
2014 03  20.33384  12 02 29.40   +14 27 55.3   20.1V 492338    G96  C~12DW      
2014 03  20.33931  12 02 29.34   +14 27 55.8   20.3V 492338    G96  C~12DW      
2014 03  20.34479  12 02 29.26   +14 27 56.3   20.6V 492338    G96  C~12DW      
2014 03  20.35026  12 02 29.19   +14 27 56.8   20.5V 492338    G96  C~12DW      
2014 03  22.37018  12 02 02.19   +14 30 52.8   20.6V 492338    G96  C~12DW      
2014 03  22.37905  12 02 02.06   +14 30 53.7   20.1V 492338    G96  C~12DW      
2014 03  22.38794  12 02 01.93   +14 30 54.6   20.7V 492338    G96  C~12DW      
2014 03  22.39682  12 02 01.81   +14 30 55.3   20.4V 492338    G96  C~12DW      
2014 03  22.89522  12 01 55.21   +14 31 37.2   20.4R 492338    Z95  C~12DW      
2014 03  22.92376  12 01 54.81   +14 31 40.0   20.0R 492338    Z95  C~12DW      
2014 03  22.94160  12 01 54.57   +14 31 41.5   20.1R 492338    Z95  C~12DW      
2014 03  22.94517  12 01 54.53   +14 31 41.9   20.0R 492338    Z95  C~12DW      
2014 04  01.83340  11 59 43.82   +14 44 15.9   20.5V 492338    A13  C~12gu      
2014 04  01.85938  11 59 43.41   +14 44 19.0   20.1V 492338    A13  C~12gu      
2015 01  28.39951  12 56 52.21   +08 17 56.4   20.6R 492338    H36  C~1LM9      
2015 01  28.43462  12 56 52.19   +08 17 58.8   20.5R 492338    H36  C~1LM9      
2015 01  28.46678  12 56 52.18   +08 18 00.8   20.5R 492338    H36  C~1LM9      
2015 02  14.12400  12 56 03.95   +08 42 02.7   20.1R 492338    461  C~1LM9      
2015 02  14.14312  12 56 03.84   +08 42 04.1   20.4R 492338    461  C~1LM9      
2015 02  14.16168  12 56 03.73   +08 42 06.1   20.1R 492338    461  C~1LM9      
2015 02  14.34543  12 56 02.74   +08 42 23.7   20.4R 492338    H36  C~1LM9      
2015 02  14.36466  12 56 02.61   +08 42 25.8   20.5R 492338    H36  C~1LM9      
2015 02  14.46964  12 56 01.99   +08 42 35.4   20.0R 492338    H36  C~1LM9      
2015 03  16.30295  12 51 21.72   +09 34 06.5   19.8R 492338    G37  C~1N85      
2015 03  16.37624  12 51 20.79   +09 34 14.0         492338    G37  C~1N85      
2015 03  25.34904  12 49 25.21   +09 48 51.3   20.2r 492338    G45  C~1Qea      
2015 03  25.35864  12 49 25.11   +09 48 53.9   20.6r 492338    G45  C~1Qea      
2015 03  25.36619  12 49 25.00   +09 48 53.7   20.2r 492338    G45  C~1Qea      
2015 03  25.37562  12 49 24.89   +09 48 54.7   20.3r 492338    G45  C~1Qea      
2016 02  04.45048  13 44 34.00   +03 05 25.7   20.4R 492338    G37  C~1lwf      
2016 02  04.53274  13 44 34.14   +03 05 30.4         492338    G37  C~1lwf      
2016 04  05.42090  13 37 15.867  +04 32 30.25  20.2w 492338    F51  C~1qA0      
2016 04  05.43579  13 37 15.655  +04 32 31.57  20.2w 492338    F51  C~1qA0      
2016 04  05.44720  13 37 15.507  +04 32 32.45  20.3w 492338    F51  C~1qA0      
2016 04  05.45866  13 37 15.343  +04 32 33.43  20.3w 492338    F51  C~1qA0      
2017 03  26.71329  14 30 55.79   -01 38 15.7   20.4R 492338    D29  C~2BnP      
2017 03  26.73299  14 30 55.63   -01 38 13.5   20.3R 492338    D29  C~2BnP      
2017 03  26.75269  14 30 55.40   -01 38 12.0   20.4R 492338    D29  C~2BnP      
2017 03  31.83150  14 30 00.79   -01 31 32.3   20.3R 492338    D29  C~2ChF      
2017 03  31.85243  14 30 00.55   -01 31 30.1   20.0R 492338    D29  C~2ChF      
2017 04  26.43966  14 24 24.331  -01 01 21.06  20.2w 492338    F51  C~2Ee1      
2017 04  26.45217  14 24 24.145  -01 01 20.33  20.3w 492338    F51  C~2Ee1      
2017 04  26.46464  14 24 23.967  -01 01 19.58  20.2w 492338    F51  C~2Ee1      
2017 04  26.47706  14 24 23.783  -01 01 18.85  20.3w 492338    F51  C~2Ee1      

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 (  -0.61)      0.00 (   2.42)
  2   0.0000      0.00     0.11       0.00    -0.06
  3   0.0000      0.00    -0.21       0.00    -0.24
  4   0.0001      0.00     0.07       0.00    -0.21
  5   3.1126      0.00     0.23       0.00    -0.24
  6   3.1126      0.00     0.39       0.00    -0.19
  7   3.1126      0.00    -0.04       0.00    -0.05
  8   3.1126      0.00    -0.02       0.00     0.00
  9   3.1345      0.00     0.04       0.00    -0.00
 10   3.1345      0.00     0.26       0.00     0.01
 11   3.1345      0.00     0.18       0.00     0.03
 12   3.1346      0.00     0.25       0.00     0.04
 13   3.1401      0.00     0.40       0.00    -0.09
 14   3.1401      0.00     0.26       0.00     0.06
 15   3.1401      0.00     0.13       0.00     0.20
 16   3.1402      0.00     0.15       0.00     0.15
 17   3.1415      0.00     0.33       0.00    -0.34
 18   3.1416      0.00     0.15       0.00     0.02
 19   3.1416      0.00     0.19       0.00     0.00
 20   3.1417      0.00     0.32       0.00     0.10
 21   3.1687      0.00     0.51       0.00    -1.19
 22   3.1688      0.00    -0.52       0.00     0.15
 23   3.9944      0.00     0.18       0.00     0.51
 24   3.9945      0.00     0.10       0.00     0.29
 25   3.9946      0.00     0.17       0.00    -0.10
 26   4.0402      0.00     0.30       0.00     0.53
 27   4.0402      0.00     0.30       0.00     0.08
 28   4.0403      0.00     0.25       0.00     0.28
 29   4.0408      0.00     0.21       0.00    -0.04
 30   4.0408      0.00    -0.06       0.00     0.19
 31   4.0411      0.00    -0.10       0.00    -0.40
 32   4.1228      0.00     0.26       0.00     0.10
 33   4.1230      0.00     0.22       0.00     0.13
 34   4.1476      0.00    -0.51       0.00    -1.46
 35   4.1476      0.00    -0.05       0.00     0.25
 36   4.1476      0.00    -0.17       0.00    -0.65
 37   4.1476      0.00     0.10       0.00    -0.53
 38   5.0130      0.00    -0.15       0.00    -0.15
 39   5.0132      0.00    -0.12       0.00    -0.19
 40   5.1799      0.00     0.15       0.00     0.09
 41   5.1800      0.00     0.06       0.00     0.16
 42   5.1800      0.00     0.21       0.00     0.08
 43   5.1800      0.00     0.14       0.00     0.10
 44   6.1527      0.00    -0.28       0.00    -0.44
 45   6.1527      0.00     0.41       0.00     0.20
 46   6.1528      0.00     0.06       0.00     0.15
 47   6.1667      0.00     0.03       0.00    -0.55
 48   6.1667      0.00     0.06       0.00     0.01
 49   6.2368      0.00     0.32       0.00    -0.07
 50   6.2368      0.00     0.26       0.00    -0.07
 51   6.2368      0.00     0.31       0.00    -0.04
 52   6.2369      0.00     0.25       0.00    -0.03

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.

492338    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        28.990    28.990    28.991
ecceobj         0.628     0.628     0.628
incobj         12.671    12.671    12.671
qmin           10.489    10.641    10.620
qmax           48.241    47.936    47.935
amean          26.267    28.731    28.015
amin           23.006    28.253    26.804
amax           29.524    29.304    29.302
emean           0.590     0.627     0.617
emin            0.539     0.620     0.595
emax            0.636     0.636     0.636
imean          11.954    11.173    11.397
imin           10.980    11.018    11.024
imax           12.793    11.461    11.679
excite_mean     0.626     0.656     0.648
fracstop        0.005     0.001     0.001
cjmean          2.622     2.541     2.563

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       155.0     118.1     121.9
kozaiamp         42.2       4.2       6.8