Orbit Fit and Astrometric record for 495189

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: 495189    
# Created Wed Dec 13 02:36:53 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   72 observations of   72
# Arc:   4.10y
# First observation: 2012/11/15
#  Last observation: 2016/12/23
# Chi-squared of fit:    53.25 DOF:  138 RMS:  0.15
# Min/Max residuals:    -0.44    0.50
# Exact a, adot, b, bdot, g, gdot:
  1.691896E-05  2.529208E-02  1.970607E-07 -1.818405E-04  2.455821E-02  2.695792E-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
  -19.703507   29.645639   -0.391108   -0.305181   -0.852445  2456246.668406
# Heliocentric elements and errors
Epoch:              2456246.5000  =  2012/11/15
Mean Anomaly:           33.78860 +/-     0.000
Argument of Peri:      221.94829 +/-     0.000
Long of Asc Node:      121.10966 +/-     0.000
Inclination:            19.28295 +/-     0.000
Eccentricity:         0.17442397 +/-    0.0000
Semi-Major Axis:     47.96290906 +/-    0.0000
Time of Perihelion: 2444859.1037 +/-       0.0
Perihelion:          39.59702808 +/-    0.0000
Aphelion:            56.32879004 +/-    0.0000
Period (y)              332.1746 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.91206874 +/-    0.0000
Ecliptic Y           19.75277719 +/-    0.0000
Ecliptic Z          -13.72877242 +/-    0.0000
Ecliptic XDOT        -0.00116081 +/-    0.0000
Ecliptic YDOT         0.00258896 +/-    0.0000
Ecliptic ZDOT        -0.00012028 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.57731968 +/-    0.0000
Geocenter to KBO     40.71955724 +/-    0.0000
# Hcoef:  6.99

The following table shows the complete astrometric record for 495189. 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 (495189) followed by the observatory code and reference code for the source of the astrometry.

2012 11  15.167628 02 17 48.75   -07 07 43.1         495189    W84  C~16dJ      
2012 11  15.183700 02 17 48.68   -07 07 43.1         495189    W84  C~16dJ      
2013 09  28.155834 02 26 51.24   -06 18 00.6   22.9g 495189    W84  C~16dJ      
2013 09  28.158037 02 26 51.25   -06 18 00.6   22.7r 495189    W84  C~16dJ      
2013 09  28.160416 02 26 51.23   -06 18 00.8   22.2i 495189    W84  C~16dJ      
2013 09  28.164261 02 26 51.22   -06 18 00.9   22.4z 495189    W84  C~16dJ      
2013 10  02.146981 02 26 35.97   -06 20 13.2   23.0r 495189    W84  C~16dJ      
2013 10  02.149338 02 26 35.98   -06 20 13.4   22.6i 495189    W84  C~16dJ      
2013 10  02.153153 02 26 35.96   -06 20 13.4   22.2z 495189    W84  C~16dJ      
2013 10  26.093530 02 24 51.46   -06 31 45.6   22.6r 495189    W84  C~16dJ      
2013 10  26.095897 02 24 51.45   -06 31 46.0   22.7i 495189    W84  C~16dJ      
2013 10  26.099720 02 24 51.42   -06 31 45.9   22.5z 495189    W84  C~16dK      
2013 11  06.050643 02 24 00.30   -06 35 37.4   23.2g 495189    W84  C~16dK      
2013 11  06.052885 02 24 00.29   -06 35 37.3   22.7r 495189    W84  C~16dK      
2013 11  06.055251 02 24 00.27   -06 35 37.4   22.4i 495189    W84  C~16dK      
2013 11  06.059066 02 24 00.25   -06 35 37.4   22.2z 495189    W84  C~16dK      
2013 11  19.055863 02 23 01.30   -06 38 39.7   22.7r 495189    W84  C~16dK      
2013 11  19.058252 02 23 01.29   -06 38 39.7   22.4i 495189    W84  C~16dK      
2013 11  19.062093 02 23 01.27   -06 38 39.8   22.6z 495189    W84  C~16dK      
2013 11  29.134948 02 22 19.13   -06 39 44.4   23.4g 495189    W84  C~16dK      
2013 11  29.137170 02 22 19.12   -06 39 44.3   22.6r 495189    W84  C~16dK      
2013 11  29.139546 02 22 19.12   -06 39 44.3   22.4i 495189    W84  C~16dK      
2013 11  29.143358 02 22 19.10   -06 39 44.4   22.4z 495189    W84  C~16dK      
2013 12  02.091133 02 22 07.63   -06 39 49.8   23.9g 495189    W84  C~16dK      
2013 12  02.093352 02 22 07.62   -06 39 49.9   22.6r 495189    W84  C~16dK      
2013 12  02.095730 02 22 07.60   -06 39 49.8   22.2i 495189    W84  C~16dK      
2013 12  02.099544 02 22 07.59   -06 39 49.9   22.4z 495189    W84  C~16dK      
2013 12  09.068801 02 21 42.41   -06 39 38.1   23.6g 495189    W84  C~16dK      
2013 12  09.071026 02 21 42.41   -06 39 38.0   22.8r 495189    W84  C~16dK      
2013 12  09.073390 02 21 42.40   -06 39 38.1   22.4i 495189    W84  C~16dK      
2013 12  09.076087 02 21 42.39   -06 39 38.0   22.3z 495189    W84  C~16dK      
2013 12  19.095450 02 21 11.71   -06 38 20.4   22.7r 495189    W84  C~16dK      
2013 12  19.097829 02 21 11.70   -06 38 20.4   22.6i 495189    W84  C~16dK      
2013 12  19.100486 02 21 11.70   -06 38 20.5   22.4z 495189    W84  C~16dK      
2013 12  27.048234 02 20 52.73   -06 36 29.7   24.6g 495189    W84  C~16dK      
2013 12  27.050441 02 20 52.69   -06 36 29.3   22.1r 495189    W84  C~16dK      
2013 12  27.055474 02 20 52.69   -06 36 29.1   22.8z 495189    W84  C~16dK      
2014 01  10.077852 02 20 32.23   -06 31 31.5   23.0r 495189    W84  C~16dK      
2014 01  10.080222 02 20 32.24   -06 31 31.3   22.2i 495189    W84  C~16dK      
2014 01  10.082868 02 20 32.24   -06 31 31.3   22.7z 495189    W84  C~16dK      
2014 01  25.096281 02 20 30.38   -06 24 06.4   23.6g 495189    W84  C~16dK      
2014 01  25.098502 02 20 30.41   -06 24 06.3   23.1r 495189    W84  C~16dK      
2014 01  25.103554 02 20 30.41   -06 24 06.2   22.5z 495189    W84  C~16dK      
2014 02  02.036262 02 20 38.07   -06 19 27.8   23.3g 495189    W84  C~16dK      
2014 02  02.038517 02 20 38.06   -06 19 27.4   22.8r 495189    W84  C~16dK      
2014 02  02.040869 02 20 38.08   -06 19 27.2   22.7i 495189    W84  C~16dK      
2014 02  02.043518 02 20 38.08   -06 19 27.2   22.5z 495189    W84  C~16dK      
2014 08  07.294344 02 33 46.04   -05 20 11.2         495189    W84  C~17LP      
2014 08  07.339832 02 33 46.06   -05 20 12.2         495189    W84  C~17LP      
2014 08  09.337088 02 33 46.84   -05 21 05.0         495189    W84  C~17LP      
2014 08  09.436588 02 33 46.84   -05 21 07.8         495189    W84  C~17LP      
2014 12  28.087650 02 26 13.52   -06 06 59.8   23.0r 495189    W84  C~1I1x      
2014 12  28.090000 02 26 13.50   -06 06 59.7   22.5i 495189    W84  C~1I1x      
2014 12  28.093796 02 26 13.50   -06 06 59.8   22.2z 495189    W84  C~1I1x      
2015 01  11.040642 02 25 52.36   -06 02 08.4   23.7g 495189    W84  C~1I1x      
2015 01  11.042847 02 25 52.36   -06 02 08.2   22.8r 495189    W84  C~1I1x      
2015 01  11.045208 02 25 52.35   -06 02 08.1   22.6i 495189    W84  C~1I1x      
2015 01  11.047859 02 25 52.36   -06 02 08.1   22.4z 495189    W84  C~1I1x      
2015 01  18.043733 02 25 48.39   -05 58 57.9   24.2g 495189    W84  C~1I1x      
2015 01  18.050347 02 25 48.38   -05 58 58.1   23.1r 495189    W84  C~1I1x      
2015 01  18.052697 02 25 48.38   -05 58 58.0   22.5i 495189    W84  C~1I1x      
2015 01  18.055336 02 25 48.37   -05 58 57.9   22.5z 495189    W84  C~1I1x      
2015 01  23.048924 02 25 48.36   -05 56 26.4   22.8r 495189    W84  C~1I1x      
2015 01  23.051285 02 25 48.37   -05 56 26.1   22.8i 495189    W84  C~1I1x      
2015 01  23.055093 02 25 48.37   -05 56 26.2   22.5z 495189    W84  C~1I1x      
2016 09  11.272153 02 43 45.16   -04 39 31.9   22.7i 495189    W84  C~2FZw      
2016 09  24.295312 02 43 08.45   -04 46 47.0   22.9r 495189    W84  C~2FZw      
2016 09  25.236690 02 43 05.35   -04 47 18.1   23.8g 495189    W84  C~2FZw      
2016 10  22.312604 02 41 16.66   -05 00 54.1   22.0i 495189    W84  C~2FZw      
2016 10  22.313970 02 41 16.66   -05 00 54.2   21.9z 495189    W84  C~2FZw      
2016 11  28.183252 02 38 29.00   -05 10 53.5   22.9r 495189    W84  C~2FZw      
2016 12  23.157176 02 37 01.53   -05 09 26.3   22.8r 495189    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    -0.11       0.00     0.50
  2   0.0000      0.00    -0.01       0.00     0.09
  3   0.8679      0.00    -0.32       0.00    -0.05
  4   0.8679      0.00    -0.04       0.00     0.02
  5   0.8679      0.00    -0.21       0.00    -0.10
  6   0.8679      0.00    -0.14       0.00    -0.07
  7   0.8788      0.00    -0.26       0.00    -0.07
  8   0.8788      0.00     0.03       0.00    -0.19
  9   0.8788      0.00    -0.04       0.00    -0.06
 10   0.9444      0.00     0.33       0.00     0.23
 11   0.9444      0.00     0.35       0.00    -0.11
 12   0.9444      0.00     0.17       0.00     0.08
 13   0.9744      0.00     0.17       0.00    -0.04
 14   0.9744      0.00     0.18       0.00     0.10
 15   0.9744      0.00     0.05       0.00     0.04
 16   0.9744      0.00     0.02       0.00     0.11
 17   1.0100      0.00     0.12       0.00     0.05
 18   1.0100      0.00     0.13       0.00     0.08
 19   1.0100      0.00     0.09       0.00     0.02
 20   1.0376      0.00     0.12       0.00    -0.07
 21   1.0376      0.00     0.10       0.00     0.04
 22   1.0376      0.00     0.25       0.00     0.04
 23   1.0376      0.00     0.18       0.00    -0.05
 24   1.0456      0.00     0.10       0.00     0.03
 25   1.0457      0.00     0.08       0.00    -0.07
 26   1.0457      0.00    -0.08       0.00     0.03
 27   1.0457      0.00    -0.01       0.00    -0.06
 28   1.0648      0.00     0.02       0.00    -0.03
 29   1.0648      0.00     0.14       0.00     0.06
 30   1.0648      0.00     0.11       0.00    -0.05
 31   1.0648      0.00     0.10       0.00     0.04
 32   1.0922      0.00    -0.04       0.00     0.14
 33   1.0922      0.00    -0.10       0.00     0.11
 34   1.0922      0.00     0.01       0.00    -0.02
 35   1.1140      0.00     0.49       0.00    -0.44
 36   1.1140      0.00    -0.04       0.00    -0.08
 37   1.1140      0.00     0.12       0.00     0.04
 38   1.1524      0.00    -0.13       0.00    -0.14
 39   1.1524      0.00     0.06       0.00    -0.00
 40   1.1524      0.00     0.09       0.00    -0.07
 41   1.1935      0.00    -0.37       0.00    -0.03
 42   1.1935      0.00     0.07       0.00    -0.00
 43   1.1935      0.00     0.02       0.00    -0.07
 44   1.2152      0.00     0.02       0.00    -0.31
 45   1.2153      0.00    -0.17       0.00     0.01
 46   1.2153      0.00     0.09       0.00     0.12
 47   1.2153      0.00     0.04       0.00     0.02
 48   1.7252      0.00     0.13       0.00    -0.34
 49   1.7253      0.00     0.14       0.00    -0.15
 50   1.7308      0.00     0.28       0.00     0.27
 51   1.7311      0.00    -0.05       0.00     0.16
 52   2.1161      0.00     0.28       0.00     0.18
 53   2.1161      0.00     0.06       0.00     0.24
 54   2.1162      0.00     0.18       0.00     0.08
 55   2.1543      0.00    -0.16       0.00    -0.12
 56   2.1543      0.00    -0.13       0.00     0.02
 57   2.1544      0.00    -0.25       0.00     0.06
 58   2.1544      0.00    -0.06       0.00    -0.00
 59   2.1735      0.00     0.02       0.00     0.39
 60   2.1735      0.00    -0.10       0.00    -0.00
 61   2.1735      0.00    -0.09       0.00     0.03
 62   2.1735      0.00    -0.23       0.00     0.05
 63   2.1872      0.00    -0.23       0.00     0.08
 64   2.1872      0.00    -0.09       0.00     0.31
 65   2.1872      0.00    -0.10       0.00     0.09
 66   3.8223      0.00     0.03       0.00     0.00
 67   3.8580      0.00     0.04       0.00    -0.08
 68   3.8606      0.00     0.03       0.00    -0.05
 69   3.9347      0.00    -0.01       0.00    -0.00
 70   3.9347      0.00     0.09       0.00    -0.07
 71   4.0356      0.00     0.12       0.00    -0.20
 72   4.1040      0.00     0.24       0.00    -0.07

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.

495189    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        48.165    48.166    48.165
ecceobj         0.179     0.179     0.179
incobj         19.282    19.282    19.282
qmin           37.982    37.985    37.977
qmax           58.115    58.118    58.111
amean          47.798    47.798    47.798
amin           47.353    47.345    47.365
amax           48.294    48.300    48.289
emean           0.160     0.160     0.160
emin            0.112     0.112     0.112
emax            0.203     0.204     0.203
imean          18.226    18.226    18.226
imin           17.257    17.257    17.257
imax           19.237    19.236    19.237
excite_mean     0.352     0.352     0.352
fracstop        1.000     1.000     1.000
cjmean          2.992     2.992     2.992

libcent 0        84.5      84.5      84.9
libamp  0        24.8      24.6      24.7
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       168.6     168.5     168.7
kozaiamp        180.0     180.0     180.0