Orbit Fit and Astrometric record for 493480

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: 493480    
# Created Wed Dec 13 02:36:53 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   61 observations of   61
# Arc:  13.31y
# First observation: 2003/12/25
#  Last observation: 2017/04/18
# Chi-squared of fit:    57.96 DOF:  116 RMS:  0.17
# Min/Max residuals:    -0.64    0.81
# Exact a, adot, b, bdot, g, gdot:
  1.605844E-05  2.488251E-02  3.992150E-06  6.625170E-03  2.554233E-02  4.537879E-04
# 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
    8.379332  160.429315    0.905404    0.054898   -0.372348  2452998.969737
# Heliocentric elements and errors
Epoch:              2452998.5000  =  2003/12/25
Mean Anomaly:          349.93162 +/-     0.000
Argument of Peri:       39.86378 +/-     0.000
Long of Asc Node:      130.89455 +/-     0.000
Inclination:            17.14654 +/-     0.000
Eccentricity:         0.02381407 +/-    0.0000
Semi-Major Axis:     40.48617454 +/-    0.0000
Time of Perihelion: 2455630.0749 +/-       0.0
Perihelion:          39.52203411 +/-    0.0000
Aphelion:            41.45031497 +/-    0.0000
Period (y)              257.6133 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -36.55006276 +/-    0.0000
Ecliptic Y           13.95574885 +/-    0.0000
Ecliptic Z            5.70544425 +/-    0.0000
Ecliptic XDOT        -0.00084548 +/-    0.0000
Ecliptic YDOT        -0.00253792 +/-    0.0000
Ecliptic ZDOT         0.00070980 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.53760638 +/-    0.0000
Geocenter to KBO     39.15071336 +/-    0.0000
# Hcoef:  5.26

The following table shows the complete astrometric record for 493480. 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 (493480) followed by the observatory code and reference code for the source of the astrometry.

2003 12  25.468994 11 00 50.88   +15 23 52.7   21.3V 493480    645  C~1vXy      
2003 12  25.469823 11 00 50.88   +15 23 52.7   21.1V 493480    645  C~1vXy      
2003 12  25.472311 11 00 50.87   +15 23 52.7   21.7V 493480    645  C~1vXy      
2005 06  01.180365 10 58 41.81   +16 06 43.1   21.3V 493480    645  C~1vXy      
2005 06  01.181194 10 58 41.81   +16 06 43.1   21.2V 493480    645  C~1vXy      
2005 06  01.183682 10 58 41.81   +16 06 43.1   21.7V 493480    645  C~1vXy      
2012 02  20.43936  11 46 44.369  +13 57 50.11  21.1w 493480    F51  C~1vXy      
2012 02  20.45450  11 46 44.318  +13 57 50.59  21.4w 493480    F51  C~1vXy      
2012 02  20.46981  11 46 44.238  +13 57 51.18  21.4w 493480    F51  C~1vXy      
2012 02  20.48512  11 46 44.171  +13 57 51.81  21.3w 493480    F51  C~1vXy      
2013 03  08.50862  11 51 31.499  +13 51 08.77  21.6g 493480    F51  C~1vXy      
2013 03  08.52054  11 51 31.439  +13 51 08.90  21.5g 493480    F51  C~1vXy      
2013 03  08.53355  11 51 31.386  +13 51 09.70  21.0r 493480    F51  C~1vXy      
2013 03  08.54508  11 51 31.332  +13 51 10.03  21.2r 493480    F51  C~1vXy      
2013 04  06.30113  11 49 14.742  +14 06 02.64  20.9w 493480    F51  C~1vXy      
2013 04  06.31496  11 49 14.687  +14 06 02.99  21.1w 493480    F51  C~1vXy      
2013 04  06.32877  11 49 14.621  +14 06 03.46  21.2w 493480    F51  C~1vXy      
2013 04  06.34251  11 49 14.561  +14 06 03.72  21.2w 493480    F51  C~1vXy      
2014 03  20.48230  11 56 38.876  +13 40 10.69  21.0r 493480    F51  C~1vXy      
2014 03  20.49358  11 56 38.809  +13 40 11.22  20.8r 493480    F51  C~1vXy      
2014 03  20.50548  11 56 38.752  +13 40 11.69  20.8r 493480    F51  C~1vXy      
2014 03  20.51729  11 56 38.704  +13 40 11.97  21.0r 493480    F51  C~1vXy      
2014 03  25.30384  11 56 15.664  +13 42 45.25  21.2w 493480    F51  C~1vXy      
2014 03  25.31790  11 56 15.606  +13 42 45.91  21.3w 493480    F51  C~1vXy      
2014 03  25.33018  11 56 15.537  +13 42 46.19  21.3w 493480    F51  C~1vXy      
2014 03  25.34254  11 56 15.473  +13 42 46.62  21.2w 493480    F51  C~1vXy      
2014 04  24.39958  11 54 03.612  +13 54 22.44  21.4w 493480    F51  C~1vXy      
2014 04  24.41186  11 54 03.564  +13 54 22.49  21.4w 493480    F51  C~1vXy      
2014 04  24.42430  11 54 03.519  +13 54 22.68  21.3w 493480    F51  C~1vXy      
2014 12  29.60511  12 06 37.789  +12 35 22.48  21.3w 493480    F51  C~1vXy      
2014 12  29.61802  12 06 37.794  +12 35 22.75  21.4w 493480    F51  C~1vXy      
2014 12  29.63103  12 06 37.800  +12 35 23.03  21.3w 493480    F51  C~1vXy      
2014 12  29.64415  12 06 37.803  +12 35 23.28  21.3w 493480    F51  C~1vXy      
2015 01  27.61388  12 06 08.032  +12 49 26.87  21.2w 493480    F51  C~1vXy      
2015 01  27.62605  12 06 08.007  +12 49 27.33  21.2w 493480    F51  C~1vXy      
2015 01  27.63818  12 06 07.974  +12 49 27.75  21.3w 493480    F51  C~1vXy      
2015 01  27.65027  12 06 07.948  +12 49 28.19  21.2w 493480    F51  C~1vXy      
2015 01  28.51210  12 06 05.890  +12 49 58.62  21.1w 493480    F51  C~1vXy      
2015 01  28.52384  12 06 05.861  +12 49 59.03  21.0w 493480    F51  C~1vXy      
2015 01  28.53552  12 06 05.826  +12 49 59.51  21.1w 493480    F51  C~1vXy      
2015 01  28.54721  12 06 05.800  +12 49 59.81  21.1w 493480    F51  C~1vXy      
2015 02  17.44958  12 05 02.314  +13 02 28.82  21.1w 493480    F51  C~1vXy      
2015 02  17.46034  12 05 02.273  +13 02 29.30  21.2w 493480    F51  C~1vXy      
2015 02  17.47121  12 05 02.226  +13 02 29.76  21.1w 493480    F51  C~1vXy      
2015 02  18.43530  12 04 58.484  +13 03 07.30  21.2w 493480    F51  C~1vXy      
2015 02  18.44608  12 04 58.436  +13 03 07.75  21.3w 493480    F51  C~1vXy      
2015 02  18.45717  12 04 58.396  +13 03 08.17  21.3w 493480    F51  C~1vXy      
2015 02  18.46794  12 04 58.353  +13 03 08.67  21.3w 493480    F51  C~1vXy      
2015 05  06.25233  11 59 25.300  +13 38 33.79  21.1i 493480    F51  C~1vXy      
2015 05  06.26353  11 59 25.252  +13 38 33.95  21.0i 493480    F51  C~1vXy      
2015 05  06.27472  11 59 25.232  +13 38 34.02  21.1i 493480    F51  C~1vXy      
2015 05  06.28593  11 59 25.167  +13 38 34.22  21.0i 493480    F51  C~1vXy      
2015 05  07.25184  11 59 22.255  +13 38 40.61  21.2w 493480    F51  C~1vXy      
2015 05  07.26468  11 59 22.216  +13 38 40.68  21.4w 493480    F51  C~1vXy      
2015 05  07.27757  11 59 22.178  +13 38 40.72  21.2w 493480    F51  C~1vXy      
2015 05  07.29074  11 59 22.141  +13 38 40.69  21.3w 493480    F51  C~1vXy      
2017 03  03.74236  12 16 02.69   +12 33 43.3   20.5R 493480    D29  C~2AE2      
2017 03  03.76239  12 16 02.67   +12 33 44.0   21.7R 493480    D29  C~2AE2      
2017 03  03.78242  12 16 02.56   +12 33 44.9   20.5R 493480    D29  C~2AE2      
2017 04  18.61783  12 12 29.89   +12 57 20.5   20.5R 493480    D29  C~2Eea      
2017 04  18.65722  12 12 29.76   +12 57 22.1   21.2R 493480    D29  C~2Eea      

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    -0.18       0.00     0.81
  2   0.0000      0.00    -0.10       0.00     0.04
  3   0.0000      0.00    -0.21       0.00    -0.02
  4   1.4338      0.00     0.13       0.00    -0.18
  5   1.4338      0.00     0.12       0.00    -0.17
  6   1.4339      0.00     0.10       0.00    -0.13
  7   8.1560      0.00     0.03       0.00     0.05
  8   8.1560      0.00     0.25       0.00    -0.05
  9   8.1561      0.00     0.05       0.00    -0.05
 10   8.1561      0.00     0.05       0.00    -0.01
 11   9.2020      0.00     0.13       0.00     0.17
 12   9.2021      0.00     0.10       0.00    -0.13
 13   9.2021      0.00     0.25       0.00     0.20
 14   9.2021      0.00     0.27       0.00     0.11
 15   9.2809      0.00    -0.13       0.00    -0.04
 16   9.2809      0.00    -0.00       0.00    -0.03
 17   9.2809      0.00    -0.04       0.00     0.10
 18   9.2810      0.00     0.00       0.00     0.02
 19  10.2341      0.00     0.17       0.00    -0.14
 20  10.2342      0.00    -0.00       0.00     0.02
 21  10.2342      0.00     0.02       0.00     0.10
 22  10.2342      0.00     0.17       0.00    -0.01
 23  10.2473      0.00    -0.01       0.00     0.00
 24  10.2474      0.00     0.15       0.00     0.23
 25  10.2474      0.00     0.01       0.00     0.12
 26  10.2474      0.00    -0.04       0.00     0.17
 27  10.3297      0.00    -0.03       0.00     0.08
 28  10.3298      0.00    -0.04       0.00    -0.04
 29  10.3298      0.00    -0.01       0.00    -0.03
 30  11.0120      0.00    -0.15       0.00    -0.00
 31  11.0120      0.00    -0.13       0.00    -0.01
 32  11.0121      0.00    -0.10       0.00    -0.01
 33  11.0121      0.00    -0.11       0.00    -0.05
 34  11.0914      0.00    -0.00       0.00     0.01
 35  11.0915      0.00     0.07       0.00     0.04
 36  11.0915      0.00     0.02       0.00     0.03
 37  11.0915      0.00     0.07       0.00     0.05
 38  11.0939      0.00     0.06       0.00     0.00
 39  11.0939      0.00     0.06       0.00    -0.01
 40  11.0940      0.00    -0.02       0.00     0.06
 41  11.0940      0.00     0.03       0.00    -0.06
 42  11.1485      0.00     0.14       0.00    -0.26
 43  11.1485      0.00     0.16       0.00    -0.20
 44  11.1485      0.00     0.10       0.00    -0.16
 45  11.1512      0.00     0.16       0.00    -0.16
 46  11.1512      0.00     0.09       0.00    -0.13
 47  11.1512      0.00     0.15       0.00    -0.15
 48  11.1513      0.00     0.16       0.00    -0.07
 49  11.3615      0.00     0.13       0.00     0.01
 50  11.3615      0.00    -0.06       0.00     0.09
 51  11.3615      0.00     0.17       0.00     0.08
 52  11.3616      0.00    -0.28       0.00     0.20
 53  11.3642      0.00    -0.03       0.00     0.11
 54  11.3643      0.00    -0.02       0.00     0.10
 55  11.3643      0.00     0.01       0.00     0.06
 56  11.3643      0.00     0.06       0.00    -0.06
 57  13.1890      0.00    -0.64       0.00    -0.35
 58  13.1890      0.00     0.41       0.00    -0.42
 59  13.1891      0.00     0.10       0.00    -0.29
 60  13.3146      0.00    -0.23       0.00    -0.40
 61  13.3147      0.00     0.38       0.00     0.43

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.

493480    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.119    40.119    40.119
ecceobj         0.015     0.015     0.015
incobj         17.191    17.191    17.191
qmin           38.513    38.509    38.516
qmax           42.195    42.184    42.201
amean          40.262    40.262    40.262
amin           39.964    39.962    39.962
amax           40.558    40.562    40.559
emean           0.021     0.021     0.021
emin            0.003     0.003     0.003
emax            0.040     0.040     0.041
imean          15.874    15.874    15.874
imin           14.992    14.992    14.992
imax           16.993    16.994    16.994
excite_mean     0.274     0.274     0.274
fracstop        1.000     1.000     1.000
cjmean          2.973     2.973     2.973

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       182.7     182.6     182.8
kozaiamp        180.0     179.9     179.9