Orbit Fit and Astrometric record for 494158

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: 494158    
# Created Mon Dec 18 02:36:52 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   95 observations of   96
# Arc:   4.28y
# First observation: 2013/01/16
#  Last observation: 2017/04/29
# Chi-squared of fit:   358.76 DOF:  184 RMS:  0.34
# Min/Max residuals:    -1.01    1.66
# Exact a, adot, b, bdot, g, gdot:
  3.262297E-05  2.978720E-01  3.241593E-06  2.682167E-02  1.415627E-01 -6.215397E-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
    3.962220  111.949378   -0.077355    0.067722   -0.976724  2456308.994228
# Heliocentric elements and errors
Epoch:              2456308.5000  =  2013/01/16
Mean Anomaly:          266.67836 +/-     0.000
Argument of Peri:      150.25358 +/-     0.000
Long of Asc Node:       77.72823 +/-     0.000
Inclination:             6.08679 +/-     0.000
Eccentricity:         0.20037448 +/-    0.0000
Semi-Major Axis:      7.66100815 +/-    0.0000
Time of Perihelion: 2458316.2386 +/-       0.0
Perihelion:           6.12593761 +/-    0.0000
Aphelion:             9.19607869 +/-    0.0000
Period (y)               21.2049 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -3.07086180 +/-    0.0000
Ecliptic Y            7.41788455 +/-    0.0000
Ecliptic Z            0.48811082 +/-    0.0000
Ecliptic XDOT        -0.00488785 +/-    0.0000
Ecliptic YDOT        -0.00329770 +/-    0.0000
Ecliptic ZDOT         0.00043457 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    8.04327018 +/-    0.0000
Geocenter to KBO      7.06409877 +/-    0.0000
# Hcoef: 12.68

The following table shows the complete astrometric record for 494158. 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 (494158) followed by the observatory code and reference code for the source of the astrometry.

2013 01  16.49345  07 37 39.664  +25 33 36.68  21.6w 494158    F51  C@0613      
2013 01  16.50791  07 37 39.302  +25 33 37.65  21.6w 494158    F51  C@0613      
2013 01  16.52236  07 37 38.934  +25 33 38.58  21.5w 494158    F51  C@0613      
2013 01  16.53687  07 37 38.575  +25 33 39.71  21.3w 494158    F51  C@0613      
2013 01  17.366682 07 37 18.174  +25 34 36.15  21.2R 494158    568  C~0o47      
2013 01  17.367936 07 37 18.142  +25 34 36.24  21.1R 494158    568  C~0o47      
2013 01  17.369189 07 37 18.114  +25 34 36.32  21.3R 494158    568  C~0o47      
2013 01  18.280700 07 36 55.703  +25 35 37.53  21.3R 494158    568  C~0o47      
2013 01  18.281952 07 36 55.670  +25 35 37.53  21.2R 494158    568  C~0o47      
2013 01  18.283213 07 36 55.636  +25 35 37.69  21.1R 494158    568  C~0o47      
2013 01  20.283943 07 36 06.561  +25 37 49.10  21.2R 494158    568  C~0o47      
2013 01  20.285200 07 36 06.528  +25 37 49.14  21.2R 494158    568  C~0o47      
2013 01  20.286469 07 36 06.496  +25 37 49.36  21.1R 494158    568  C~0o47      
2013 01  22.13782  07 35 21.34   +25 39 46.6         494158    291  C~0o47      
2013 01  22.16465  07 35 20.76   +25 39 49.0   21.1R 494158    291  C~0o47      
2013 01  22.21327  07 35 19.57   +25 39 51.7   21.1R 494158    291  C~0o47      
2013 12  31.40420  09 02 31.69   +22 20 47.0   20.8V 494158    691  C~1vZu      
2013 12  31.42207  09 02 31.42   +22 20 48.0   21.4V 494158    691  C~1vZu      
2013 12  31.43984  09 02 31.07   +22 20 49.9   21.1V 494158    691  C~1vZu      
2014 02  23.26565  08 42 17.144  +23 53 56.55  21.5w 494158    F51  C~1vZu      
2014 02  23.27820  08 42 16.883  +23 53 57.32  21.5w 494158    F51  C~1vZu      
2014 02  23.29077  08 42 16.639  +23 53 58.00  21.6w 494158    F51  C~1vZu      
2014 02  23.30342  08 42 16.356  +23 53 59.04  21.5w 494158    F51  C~1vZu      
2014 03  02.24028  08 40 01.076  +24 00 47.46  22.0w 494158    F51  C~1vZu      
2014 03  02.25177  08 40 00.838  +24 00 48.52  21.8w 494158    F51  C~1vZu      
2014 03  02.26320  08 40 00.639  +24 00 48.97  21.6w 494158    F51  C~1vZu      
2014 03  02.27469  08 40 00.411  +24 00 49.68  21.8w 494158    F51  C~1vZu      
2014 11  29.55806  10 23 47.215  +16 08 12.23  22.1w 494158    F51  C~1vZu      
2014 11  29.57113  10 23 47.357  +16 08 12.45  22.0w 494158    F51  C~1vZu      
2014 11  29.58412  10 23 47.476  +16 08 12.58  22.0w 494158    F51  C~1vZu      
2014 11  29.59712  10 23 47.616  +16 08 12.50  22.2w 494158    F51  C~1vZu      
2015 01  23.45372  10 19 52.267  +17 21 30.84  21.3w 494158    F51  C~1vZu      
2015 01  23.46561  10 19 52.045  +17 21 32.65  21.4w 494158    F51  C~1vZv      
2015 01  23.47767  10 19 51.828  +17 21 34.19  21.5w 494158    F51  C~1vZv      
2015 02  20.32231  10 09 42.90   +18 28 22.8   20.9V 494158    G96  C~1M9F      
2015 02  20.32690  10 09 42.81   +18 28 23.3   20.7V 494158    G96  C~1M9F      
2015 02  20.33149  10 09 42.69   +18 28 24.2   20.5V 494158    G96  C~1M9F      
2015 02  20.33609  10 09 42.59   +18 28 24.5   20.4V 494158    G96  C~1M9F      
2015 02  21.34553  10 09 18.40   +18 30 39.9   20.6V 494158    G96  C~1M9F      
2015 02  21.35511  10 09 18.18   +18 30 41.5   20.6V 494158    G96  C~1M9F      
2015 02  21.35989  10 09 18.11   +18 30 42.0   20.7V 494158    G96  C~1M9F      
2015 02  22.23768  10 08 57.17   +18 32 38.8   20.6V 494158    G96  C~1M9F      
2015 02  22.24241  10 08 57.14   +18 32 39.0   20.4V 494158    G96  C~1M9F      
2015 02  22.24711  10 08 56.92   +18 32 39.8   21.1V 494158    G96  C~1M9F      
2015 02  22.25182  10 08 56.84   +18 32 40.4   20.5V 494158    G96  C~1M9F      
2015 03  14.26619  10 01 24.439  +19 09 38.75  21.4w 494158    F51  C~1vZv      
2015 03  14.27970  10 01 24.156  +19 09 40.03  21.3w 494158    F51  C~1vZv      
2015 03  14.29394  10 01 23.856  +19 09 41.28  21.4w 494158    F51  C~1vZv      
2015 03  14.30692  10 01 23.588  +19 09 42.35  21.2w 494158    F51  C~1vZv      
2015 03  15.24721  10 01 04.580  +19 11 01.42  21.2w 494158    F51  C~1vZv      
2015 03  15.26000  10 01 04.319  +19 11 02.50  21.2w 494158    F51  C~1vZv      
2015 03  15.27279  10 01 04.055  +19 11 03.59  21.1w 494158    F51  C~1vZv      
2015 03  15.28557  10 01 03.796  +19 11 04.74  21.1w 494158    F51  C~1vZv      
2015 04  07.24184  09 55 09.938  +19 29 03.72  21.2r 494158    F51  C~1vZv      
2015 04  07.25455  09 55 09.820  +19 29 03.66  21.6r 494158    F51  C~1vZv      
2015 04  07.26749  09 55 09.682  +19 29 03.83  21.3r 494158    F51  C~1vZv      
2015 04  07.28047  09 55 09.532  +19 29 04.10  21.4r 494158    F51  C~1vZv      
2015 06  11.29582  10 03 17.293  +17 57 11.88  22.0w 494158    F51  C~1vZv      
2015 06  11.30107  10 03 17.442  +17 57 10.82  21.8w 494158    F51  C~1vZv      
2015 06  11.30631  10 03 17.558  +17 57 09.99  21.9w 494158    F51  C~1vZv      
2016 03  01.39127  11 39 12.347  +09 59 33.34  20.8r 494158    F51  C~1n4y      
2016 03  01.40302  11 39 12.070  +09 59 35.27  20.9r 494158    F51  C~1n4y      
2016 03  01.42686  11 39 11.526  +09 59 38.97  20.7r 494158    F51  C~1n4y      
2016 03  02.24657  11 38 53.23   +10 01 47.4   21.2V 494158    I52  C~1n4y      
2016 03  02.25987  11 38 52.90   +10 01 49.3   20.6V 494158    I52  C~1n4y      
2016 03  02.27260  11 38 52.65   +10 01 52.2   21.2V 494158    I52  C~1n4y      
2016 03  02.28540  11 38 52.33   +10 01 53.7   20.8V 494158    I52  C~1n4y      
2016 03  03.49731  11 38 24.95   +10 05 05.0         494158    291  C~1n4y      
2016 03  03.52053  11 38 24.42   +10 05 08.5         494158    291  C~1n4y      
2016 03  10.37838  11 35 46.06   +10 22 47.2   20.4V 494158    G96  C~1ny5      
2016 03  10.38147  11 35 46.01   +10 22 47.3   20.7V 494158    G96  C~1ny5      
2016 03  10.38456  11 35 45.91   +10 22 47.9   21.0V 494158    G96  C~1ny5      
2016 03  10.38765  11 35 45.85   +10 22 48.3   20.9V 494158    G96  C~1ny5      
2016 03  11.35514  11 35 23.277  +10 25 13.68  20.7w 494158    F51  C~1oah      
2016 03  11.36741  11 35 22.962  +10 25 15.79  20.7w 494158    F51  C~1oah      
2016 03  11.37977  11 35 22.674  +10 25 17.41  20.8w 494158    F51  C~1oah      
2016 03  11.39217  11 35 22.382  +10 25 19.44  20.7w 494158    F51  C~1oah      
2016 03  29.30891  11 28 30.210  +11 04 49.89  21.0w 494158    F51  C~1pRP      
2016 03  29.32139  11 28 29.942  +11 04 51.24  20.9w 494158    F51  C~1pRP      
2016 03  29.33393  11 28 29.655  +11 04 52.73  21.0w 494158    F51  C~1pRP      
2016 03  29.34655  11 28 29.375  +11 04 54.02  20.9w 494158    F51  C~1pRP      
2016 04  05.32044  11 26 04.047  +11 16 30.69  20.8w 494158    F51  C~1qAj      
2016 04  05.33159  11 26 03.811  +11 16 31.68  21.0w 494158    F51  C~1qAj      
2016 04  05.34283  11 26 03.583  +11 16 32.73  20.8w 494158    F51  C~1qAj      
2017 03  22.40843  13 13 16.486  -00 59 04.59  20.8w 494158    F51  C~2B0K      
2017 03  22.42068  13 13 16.214  -00 59 02.92  20.6w 494158    F51  C~2B0K      
2017 03  22.43296  13 13 15.934  -00 59 01.29  20.5w 494158    F51  C~2B0K      
2017 03  22.44524  13 13 15.676  -00 58 59.45  20.7w 494158    F51  C~2B0K      
2017 04  27.31388  12 59 23.654  +00 14 36.70  20.7w 494158    F51  C~2Eep      
2017 04  27.32758  12 59 23.352  +00 14 37.82  20.7w 494158    F51  C~2Eep      
2017 04  27.34133  12 59 23.054  +00 14 39.10  20.7w 494158    F51  C~2Eep      
2017 04  27.35514  12 59 22.747  +00 14 40.29  20.7w 494158    F51  C~2Eep      
2017 04  29.21021  12 58 43.95   +00 17 16.7   21.1V 494158    G96  C~2F8x      
2017 04  29.21448  12 58 43.89   +00 17 18.1   20.7V 494158    G96  C~2F8x      
2017 04  29.22038  12 58 43.79   +00 17 18.3   21.0V 494158    G96  C~2F8x      
2017 04  29.22466  12 58 43.62   +00 17 18.4   20.9V 494158    G96  C~2F8x      

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 (  -0.88)      0.00 (   3.41)
  2   0.0000      0.00     0.46       0.00    -0.13
  3   0.0001      0.00     0.40       0.00    -0.16
  4   0.0001      0.00     0.48       0.00     0.00
  5   0.0024      0.00     0.33       0.00    -0.17
  6   0.0024      0.00     0.32       0.00    -0.17
  7   0.0024      0.00     0.37       0.00    -0.17
  8   0.0049      0.00     0.40       0.00    -0.08
  9   0.0049      0.00     0.37       0.00    -0.16
 10   0.0049      0.00     0.33       0.00    -0.09
 11   0.0104      0.00     0.33       0.00    -0.09
 12   0.0104      0.00     0.30       0.00    -0.13
 13   0.0104      0.00     0.30       0.00     0.00
 14   0.0155      0.00    -0.94       0.00    -0.12
 15   0.0155      0.00     0.25       0.00     0.54
 16   0.0157      0.00     0.36       0.00     0.13
 17   0.9553      0.00    -1.01       0.00     1.49
 18   0.9553      0.00    -0.24       0.00     0.50
 19   0.9554      0.00    -0.69       0.00     0.42
 20   1.1027      0.00     0.16       0.00     0.01
 21   1.1028      0.00     0.23       0.00    -0.08
 22   1.1028      0.00     0.57       0.00    -0.26
 23   1.1028      0.00     0.35       0.00    -0.08
 24   1.1218      0.00     0.61       0.00    -0.63
 25   1.1219      0.00     0.25       0.00    -0.17
 26   1.1219      0.00     0.47       0.00    -0.33
 27   1.1219      0.00     0.27       0.00    -0.22
 28   1.8674      0.00    -0.15       0.00    -0.24
 29   1.8674      0.00    -0.01       0.00    -0.05
 30   1.8675      0.00    -0.21       0.00     0.06
 31   1.8675      0.00    -0.08       0.00    -0.04
 32   2.0177      0.00     0.18       0.00    -0.22
 33   2.0177      0.00     0.17       0.00    -0.10
 34   2.0178      0.00     0.28       0.00    -0.27
 35   2.0940      0.00     0.48       0.00    -0.13
 36   2.0940      0.00     0.82       0.00    -0.25
 37   2.0940      0.00     0.70       0.00     0.03
 38   2.0940      0.00     0.89       0.00    -0.29
 39   2.0968      0.00    -0.00       0.00    -0.39
 40   2.0968      0.00     0.21       0.00    -0.06
 41   2.0968      0.00     0.91       0.00    -0.19
 42   2.0992      0.00     0.38       0.00     0.12
 43   2.0992      0.00     1.66       0.00    -0.30
 44   2.0993      0.00     0.08       0.00    -0.13
 45   2.0993      0.00     0.60       0.00    -0.16
 46   2.1541      0.00     0.25       0.00    -0.06
 47   2.1541      0.00     0.23       0.00     0.04
 48   2.1541      0.00     0.20       0.00     0.05
 49   2.1542      0.00     0.25       0.00    -0.01
 50   2.1568      0.00     0.15       0.00    -0.04
 51   2.1568      0.00     0.17       0.00    -0.04
 52   2.1568      0.00     0.15       0.00    -0.03
 53   2.1569      0.00     0.21       0.00     0.04
 54   2.2197      0.00    -0.01       0.00     0.19
 55   2.2197      0.00     0.23       0.00    -0.01
 56   2.2198      0.00     0.21       0.00     0.02
 57   2.2198      0.00     0.02       0.00     0.16
 58   2.3978      0.00    -0.33       0.00    -0.05
 59   2.3978      0.00     0.08       0.00    -0.24
 60   2.3978      0.00     0.00       0.00    -0.21
 61   3.1209      0.00     0.35       0.00    -0.08
 62   3.1209      0.00     0.21       0.00    -0.02
 63   3.1210      0.00     0.22       0.00    -0.09
 64   3.1232      0.00     0.02       0.00    -0.58
 65   3.1232      0.00    -0.37       0.00    -0.79
 66   3.1233      0.00     0.26       0.00     0.10
 67   3.1233      0.00    -0.14       0.00    -0.43
 68   3.1266      0.00     0.27       0.00     0.34
 69   3.1267      0.00     0.31       0.00     0.22
 70   3.1455      0.00    -0.22       0.00     0.19
 71   3.1455      0.00     0.14       0.00    -0.18
 72   3.1455      0.00    -0.25       0.00    -0.04
 73   3.1455      0.00    -0.04       0.00    -0.11
 74   3.1481      0.00     0.33       0.00    -0.38
 75   3.1482      0.00     0.03       0.00    -0.11
 76   3.1482      0.00     0.16       0.00    -0.35
 77   3.1483      0.00     0.26       0.00    -0.18
 78   3.1973      0.00     0.05       0.00    -0.11
 79   3.1973      0.00     0.20       0.00    -0.15
 80   3.1974      0.00     0.09       0.00    -0.05
 81   3.1974      0.00     0.12       0.00    -0.16
 82   3.2165      0.00     0.23       0.00    -0.04
 83   3.2165      0.00     0.10       0.00    -0.05
 84   3.2166      0.00     0.13       0.00     0.00
 85   4.1777      0.00     0.30       0.00    -0.01
 86   4.1778      0.00     0.33       0.00    -0.03
 87   4.1778      0.00     0.26       0.00    -0.10
 88   4.1778      0.00     0.52       0.00     0.04
 89   4.2760      0.00     0.38       0.00    -0.00
 90   4.2761      0.00     0.34       0.00    -0.08
 91   4.2761      0.00     0.37       0.00    -0.01
 92   4.2761      0.00     0.29       0.00    -0.03
 93   4.2812      0.00     0.21       0.00    -0.56
 94   4.2812      0.00     0.67       0.00     0.49
 95   4.2813      0.00     1.05       0.00     0.21
 96   4.2813      0.00    -0.14       0.00    -0.04

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.

494158    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj         7.651     7.651     7.651
ecceobj         0.202     0.202     0.202
incobj          6.093     6.093     6.093
qmin            6.108     6.108     6.108
qmax            9.193     9.193     9.193
amean           7.651     7.651     7.650
amin            7.651     7.651     7.650
amax            7.651     7.651     7.650
emean           0.202     0.202     0.202
emin            0.202     0.202     0.202
emax            0.202     0.202     0.202
imean           4.788     4.788     4.788
imin            4.788     4.788     4.788
imax            4.788     4.788     4.788
excite_mean     0.218     0.218     0.218
fracstop        0.000     0.000     0.000
cjmean          4.918     4.918     4.918

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       151.3     151.3     151.3
kozaiamp          0.0       0.0       0.0