Orbit Fit and Astrometric record for 495190

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: 495190    
# Created Sun May 27 01:36:59 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   61 observations of   61
# Arc:   8.00y
# First observation: 2008/12/22
#  Last observation: 2016/12/23
# Chi-squared of fit:    71.66 DOF:  116 RMS:  0.19
# Min/Max residuals:    -0.76    0.83
# Exact a, adot, b, bdot, g, gdot:
  1.713772E-05  2.859766E-02 -6.075227E-06 -1.180527E-02  2.654734E-02 -1.087497E-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
  -15.796281   23.844575   -0.908795   -0.105662   -0.373630  2454822.707322
# Heliocentric elements and errors
Epoch:              2454822.5000  =  2008/12/22
Mean Anomaly:          358.51148 +/-     0.000
Argument of Peri:      219.73043 +/-     0.000
Long of Asc Node:      171.56156 +/-     0.000
Inclination:            26.76476 +/-     0.000
Eccentricity:         0.31063311 +/-    0.0000
Semi-Major Axis:     55.18246316 +/-    0.0000
Time of Perihelion: 2455441.5886 +/-       0.0
Perihelion:          38.04096304 +/-    0.0000
Aphelion:            72.32396327 +/-    0.0000
Period (y)              409.9301 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.14176544 +/-    0.0000
Ecliptic Y           15.63692349 +/-    0.0000
Ecliptic Z          -10.25427773 +/-    0.0000
Ecliptic XDOT        -0.00158849 +/-    0.0000
Ecliptic YDOT         0.00252285 +/-    0.0000
Ecliptic ZDOT        -0.00114109 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.05313197 +/-    0.0000
Geocenter to KBO     37.66861817 +/-    0.0000
# Hcoef:  7.54

The following table shows the complete astrometric record for 495190. 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 (495190) followed by the observatory code and reference code for the source of the astrometry.

2008 12  22.206568 01 51 26.02   -05 27 09.6   22.9V 495190    645  C~2WWc      
2008 12  22.207397 01 51 26.02   -05 27 09.5   22.3V 495190    645  C~2WWc      
2008 12  22.209885 01 51 26.02   -05 27 09.5   24.4V 495190    645  C~2WWc      
2008 12  30.216275 01 51 15.00   -05 25 39.7   22.7V 495190    645  C~2WWc      
2008 12  30.217104 01 51 15.00   -05 25 39.7   22.4V 495190    645  C~2WWc      
2008 12  30.219592 01 51 15.00   -05 25 39.7   23.4V 495190    645  C~2WWc      
2012 11  12.155156 02 22 34.55   -05 27 16.0         495190    W84  C~16dK      
2012 11  12.156528 02 22 34.50   -05 27 16.0         495190    W84  C~16dK      
2012 11  14.086794 02 22 25.30   -05 27 57.2         495190    W84  C~16dK      
2012 11  14.088171 02 22 25.33   -05 27 56.5         495190    W84  C~16dK      
2012 12  06.203646 02 20 50.80   -05 32 29.9   22.8r 495190    W84  C~16dK      
2012 12  06.206007 02 20 50.81   -05 32 30.0   23.2i 495190    W84  C~16dK      
2012 12  06.209815 02 20 50.77   -05 32 30.0   22.5z 495190    W84  C~16dK      
2012 12  06.219016 02 20 50.75   -05 32 29.9   23.3r 495190    W84  C~16dK      
2012 12  06.221366 02 20 50.74   -05 32 30.2   22.8i 495190    W84  C~16dK      
2012 12  10.092147 02 20 36.99   -05 32 40.2   23.6g 495190    W84  C~16dK      
2012 12  10.094352 02 20 36.97   -05 32 40.1   23.3r 495190    W84  C~16dK      
2012 12  10.096690 02 20 36.98   -05 32 40.1   22.7i 495190    W84  C~16dK      
2012 12  10.100486 02 20 36.97   -05 32 40.1   22.5z 495190    W84  C~16dK      
2012 12  16.187089 02 20 17.56   -05 32 32.5   24.2g 495190    W84  C~16dK      
2012 12  16.189317 02 20 17.55   -05 32 32.9   23.1r 495190    W84  C~16dK      
2012 12  16.191678 02 20 17.54   -05 32 32.7   22.9i 495190    W84  C~16dK      
2012 12  16.195498 02 20 17.52   -05 32 32.7   22.7z 495190    W84  C~16dK      
2013 01  04.086568 02 19 37.36   -05 29 14.2   23.4g 495190    W84  C~16dK      
2013 01  04.088773 02 19 37.35   -05 29 14.1   23.0r 495190    W84  C~16dK      
2013 01  04.091146 02 19 37.33   -05 29 14.1   23.2i 495190    W84  C~16dK      
2013 01  04.094931 02 19 37.33   -05 29 13.8   22.5z 495190    W84  C~16dK      
2013 01  23.058623 02 19 31.85   -05 21 53.1   22.8r 495190    W84  C~16dK      
2013 01  23.061007 02 19 31.84   -05 21 53.1   22.4i 495190    W84  C~16dK      
2013 01  23.064803 02 19 31.84   -05 21 53.1   22.3z 495190    W84  C~16dK      
2013 02  02.052269 02 19 43.84   -05 16 41.4         495190    W84  C~16dK      
2013 02  02.053681 02 19 43.84   -05 16 41.2         495190    W84  C~16dK      
2013 12  20.080417 02 27 16.90   -05 32 48.5   23.4g 495190    W84  C~16dK      
2013 12  20.096412 02 27 16.84   -05 32 48.4   22.7i 495190    W84  C~16dK      
2013 12  20.118877 02 27 16.78   -05 32 48.0   23.0r 495190    W84  C~16dK      
2013 12  27.117083 02 26 59.18   -05 31 46.7   23.4g 495190    W84  C~16dK      
2013 12  27.133229 02 26 59.16   -05 31 46.7   22.5i 495190    W84  C~16dK      
2014 01  04.050579 02 26 44.62   -05 29 54.2   23.9g 495190    W84  C~16dK      
2014 01  04.077257 02 26 44.57   -05 29 53.8   22.5z 495190    W84  C~16dK      
2014 01  04.113530 02 26 44.53   -05 29 53.0   22.6i 495190    W84  C~16dK      
2014 01  12.067975 02 26 36.08   -05 27 16.3   22.7i 495190    W84  C~16dK      
2014 01  12.090428 02 26 36.07   -05 27 15.8   22.9r 495190    W84  C~16dK      
2014 01  19.101192 02 26 33.94   -05 24 24.9   22.8i 495190    W84  C~16dK      
2014 01  19.126910 02 26 33.95   -05 24 24.3   22.9r 495190    W84  C~16dK      
2014 01  26.080382 02 26 36.84   -05 21 06.9   23.5g 495190    W84  C~16dK      
2014 01  26.096458 02 26 36.86   -05 21 06.4   22.7i 495190    W84  C~16dK      
2014 01  28.049676 02 26 38.58   -05 20 06.3   22.9i 495190    W84  C~16dK      
2014 01  28.072257 02 26 38.61   -05 20 05.8   23.0r 495190    W84  C~16dK      
2014 02  04.061030 02 26 48.10   -05 16 16.2   22.4i 495190    W84  C~16dK      
2014 02  04.079039 02 26 48.10   -05 16 15.6         495190    W84  C~16dK      
2014 08  07.297030 02 41 48.02   -04 27 46.5         495190    W84  C~17LP      
2014 08  07.342847 02 41 48.05   -04 27 47.6         495190    W84  C~17LP      
2014 08  09.341186 02 41 49.71   -04 28 54.3         495190    W84  C~17LP      
2014 08  09.439780 02 41 49.79   -04 28 57.8         495190    W84  C~17LP      
2015 12  05.192477 02 42 30.15   -05 33 09.6   22.7r 495190    W84  C~2FZw      
2015 12  05.193831 02 42 30.15   -05 33 09.6   23.3g 495190    W84  C~2FZw      
2016 09  24.311632 02 54 59.85   -04 59 13.8   23.3r 495190    W84  C~2FZw      
2016 11  03.198542 02 52 08.12   -05 23 42.2   22.8i 495190    W84  C~2FZw      
2016 11  03.199907 02 52 08.12   -05 23 42.4   22.8r 495190    W84  C~2FZw      
2016 11  03.201285 02 52 08.11   -05 23 42.3   23.7g 495190    W84  C~2FZw      
2016 12  23.155787 02 48 30.22   -05 32 33.6   23.8g 495190    W84  C~2FZw      

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    -0.13       0.00     0.34
  2   0.0000      0.00     0.10       0.00    -0.10
  3   0.0000      0.00     0.16       0.00    -0.13
  4   0.0219      0.00    -0.02       0.00     0.09
  5   0.0219      0.00    -0.01       0.00     0.08
  6   0.0219      0.00     0.03       0.00     0.05
  7   3.8903      0.00     0.35       0.00     0.22
  8   3.8903      0.00    -0.30       0.00     0.25
  9   3.8956      0.00    -0.76       0.00    -0.50
 10   3.8956      0.00    -0.21       0.00     0.23
 11   3.9562      0.00     0.09       0.00    -0.03
 12   3.9562      0.00     0.37       0.00    -0.12
 13   3.9562      0.00    -0.02       0.00    -0.11
 14   3.9562      0.00     0.20       0.00     0.03
 15   3.9562      0.00     0.18       0.00    -0.26
 16   3.9668      0.00    -0.05       0.00    -0.11
 17   3.9668      0.00    -0.24       0.00    -0.00
 18   3.9668      0.00     0.04       0.00    -0.00
 19   3.9669      0.00     0.09       0.00     0.00
 20   3.9835      0.00     0.05       0.00     0.26
 21   3.9835      0.00     0.00       0.00    -0.15
 22   3.9835      0.00    -0.04       0.00     0.04
 23   3.9835      0.00    -0.17       0.00     0.03
 24   4.0353      0.00     0.01       0.00    -0.06
 25   4.0353      0.00    -0.10       0.00    -0.00
 26   4.0353      0.00    -0.35       0.00    -0.04
 27   4.0353      0.00    -0.27       0.00     0.19
 28   4.0872      0.00     0.11       0.00    -0.02
 29   4.0872      0.00    -0.06       0.00    -0.09
 30   4.0872      0.00    -0.10       0.00    -0.20
 31   4.1146      0.00    -0.23       0.00     0.06
 32   4.1146      0.00    -0.26       0.00     0.21
 33   4.9935      0.00     0.24       0.00    -0.07
 34   4.9935      0.00     0.03       0.00    -0.07
 35   4.9936      0.00     0.10       0.00     0.19
 36   5.0128      0.00    -0.15       0.00     0.11
 37   5.0128      0.00     0.10       0.00    -0.07
 38   5.0345      0.00     0.18       0.00    -0.11
 39   5.0346      0.00     0.05       0.00    -0.16
 40   5.0347      0.00     0.28       0.00     0.02
 41   5.0564      0.00     0.05       0.00     0.05
 42   5.0565      0.00     0.15       0.00     0.05
 43   5.0757      0.00     0.09       0.00    -0.13
 44   5.0758      0.00     0.24       0.00    -0.21
 45   5.0948      0.00    -0.10       0.00    -0.10
 46   5.0948      0.00     0.02       0.00    -0.09
 47   5.1002      0.00    -0.09       0.00     0.06
 48   5.1002      0.00     0.05       0.00    -0.14
 49   5.1194      0.00     0.83       0.00     0.34
 50   5.1194      0.00     0.38       0.00     0.33
 51   5.6238      0.00     0.18       0.00     0.07
 52   5.6239      0.00     0.03       0.00     0.47
 53   5.6294      0.00    -0.10       0.00     0.11
 54   5.6297      0.00     0.14       0.00    -0.07
 55   6.9514      0.00    -0.05       0.00    -0.14
 56   6.9514      0.00     0.04       0.00    -0.13
 57   7.7566      0.00     0.11       0.00     0.07
 58   7.8658      0.00    -0.08       0.00     0.02
 59   7.8658      0.00     0.02       0.00    -0.14
 60   7.8658      0.00    -0.02       0.00     0.00
 61   8.0026      0.00    -0.16       0.00    -0.05

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.

495190    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        55.771    55.771    55.771
ecceobj         0.318     0.318     0.318
incobj         26.733    26.733    26.733
qmin           36.322    36.296    36.325
qmax           75.056    74.938    75.003
amean          55.204    55.203    55.204
amin           54.595    54.613    54.606
amax           55.978    55.940    55.949
emean           0.318     0.318     0.318
emin            0.295     0.295     0.295
emax            0.341     0.340     0.341
imean          25.832    25.833    25.833
imin           25.085    25.095    25.078
imax           26.554    26.554    26.554
excite_mean     0.539     0.539     0.539
fracstop        1.000     1.000     1.000
cjmean          2.857     2.857     2.857

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       184.0     183.9     183.9
kozaiamp        180.0     179.9     179.9