Orbit Fit and Astrometric record for 480017

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: 480017    
# Created Sat Oct 21 01:36:53 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   48 observations of   48
# Arc:   5.03y
# First observation: 2010/10/06
#  Last observation: 2015/10/17
# Chi-squared of fit:    51.61 DOF:   90 RMS:  0.18
# Min/Max residuals:    -1.09    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.955563E-05  3.196727E-02  2.239555E-06  2.072551E-03  2.680124E-02  5.335260E-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
   -6.470537   15.682204    0.045953   -0.112142   -0.988604  2455475.930766
# Heliocentric elements and errors
Epoch:              2455476.5000  =  2010/10/07
Mean Anomaly:           10.48691 +/-     0.000
Argument of Peri:      269.60809 +/-     0.000
Long of Asc Node:       75.31566 +/-     0.000
Inclination:             7.28879 +/-     0.000
Eccentricity:         0.45469511 +/-    0.0000
Semi-Major Axis:     67.20849982 +/-    0.0000
Time of Perihelion: 2449614.0434 +/-       0.0
Perihelion:          36.64912333 +/-    0.0000
Aphelion:            97.76787630 +/-    0.0000
Period (y)              550.9910 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.66832193 +/-    0.0000
Ecliptic Y           10.24530589 +/-    0.0000
Ecliptic Z           -4.20465489 +/-    0.0000
Ecliptic XDOT        -0.00033816 +/-    0.0000
Ecliptic YDOT         0.00330321 +/-    0.0000
Ecliptic ZDOT         0.00014894 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.30407692 +/-    0.0000
Geocenter to KBO     37.31162998 +/-    0.0000
# Hcoef:  6.50

The following table shows the complete astrometric record for 480017. 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 (480017) followed by the observatory code and reference code for the source of the astrometry.

2010 10  06.43000  01 07 43.803  +00 11 49.90  22.0w 480017    F51  C~1vXi      
2010 10  06.44267  01 07 43.743  +00 11 49.81  21.9w 480017    F51  C~1vXi      
2010 10  06.45656  01 07 43.676  +00 11 49.29  21.9w 480017    F51  C~1vXi      
2010 10  06.46948  01 07 43.628  +00 11 49.28  22.0w 480017    F51  C~1vXi      
2011 09  23.45719  01 15 18.494  +01 06 41.45  22.2w 480017    F51  C~1vXi      
2011 09  23.47254  01 15 18.442  +01 06 40.98  22.0w 480017    F51  C~1vXi      
2011 09  23.50349  01 15 18.312  +01 06 39.73  22.3w 480017    F51  C~1vXi      
2012 11  05.28942  01 18 25.802  +01 35 26.80  22.0w 480017    F51  C~1vXi      
2012 11  05.30457  01 18 25.731  +01 35 26.33  22.3w 480017    F51  C~1vXi      
2012 11  05.31964  01 18 25.654  +01 35 26.15  22.4w 480017    F51  C~1vXi      
2012 11  05.33477  01 18 25.589  +01 35 25.82  22.3w 480017    F51  C~1vXi      
2013 10  02.39731  01 27 29.943  +02 37 06.95  22.4w 480017    F51  C~1vXi      
2013 10  02.41214  01 27 29.862  +02 37 06.47  22.4w 480017    F51  C~1vXi      
2013 10  02.42700  01 27 29.788  +02 37 06.05  22.2w 480017    F51  C~1vXi      
2013 10  02.44192  01 27 29.740  +02 37 05.53  22.4w 480017    F51  C~1vXi      
2013 11  08.197002 01 24 39.00   +02 21 42.1   23.6g 480017    W84  C~1wzB      
2013 11  08.211053 01 24 38.94   +02 21 41.8   21.6i 480017    W84  C~1wzB      
2013 11  23.153507 01 23 40.37   +02 17 37.3   21.7i 480017    W84  C~1wzB      
2013 11  23.154884 01 23 40.37   +02 17 37.3   21.6z 480017    W84  C~1wzB      
2014 08  25.54845  01 36 08.255  +03 39 30.40  22.4w 480017    F51  C~1vXi      
2014 08  25.56211  01 36 08.231  +03 39 30.03  22.4w 480017    F51  C~1vXi      
2014 08  25.57580  01 36 08.193  +03 39 29.82  22.5w 480017    F51  C~1vXi      
2014 08  25.58956  01 36 08.155  +03 39 29.31  22.4w 480017    F51  C~1vXi      
2014 08  27.58202  01 36 03.237  +03 38 48.19  22.1w 480017    F51  C~1vXi      
2014 08  27.59368  01 36 03.219  +03 38 47.96  22.4w 480017    F51  C~1vXi      
2014 08  27.60529  01 36 03.188  +03 38 47.75  22.4w 480017    F51  C~1vXi      
2014 08  27.61688  01 36 03.141  +03 38 47.50  22.2w 480017    F51  C~1vXi      
2014 09  23.46327  01 34 30.556  +03 27 43.95  22.4w 480017    F51  C~1vXi      
2014 09  23.48808  01 34 30.450  +03 27 42.85  22.4w 480017    F51  C~1vXi      
2014 09  23.50055  01 34 30.389  +03 27 42.97  22.1w 480017    F51  C~1vXi      
2014 10  02.288322 01 33 51.92   +03 23 41.7   22.7g 480017    W84  C~1wzB      
2014 10  21.241806 01 32 23.03   +03 15 10.7   23.3g 480017    W84  C~1wzB      
2014 10  21.259421 01 32 22.95   +03 15 10.2   22.1i 480017    W84  C~1wzB      
2014 10  23.255579 01 32 13.47   +03 14 19.5   22.2r 480017    W84  C~1wzB      
2014 10  28.218623 01 31 50.09   +03 12 17.4   22.0i 480017    W84  C~1wzB      
2014 10  29.234514 01 31 45.36   +03 11 53.2   22.1r 480017    W84  C~1wzB      
2014 11  15.053970 01 30 31.42   +03 06 04.5   22.4r 480017    W84  C~1wzB      
2014 11  20.37179  01 30 10.533  +03 04 37.95  22.3w 480017    F51  C~1vXi      
2014 11  20.38465  01 30 10.487  +03 04 37.69  22.4w 480017    F51  C~1vXi      
2014 11  20.39752  01 30 10.454  +03 04 37.56  22.5w 480017    F51  C~1vXi      
2014 11  21.044201 01 30 08.02   +03 04 28.4   22.1z 480017    W84  C~1wzB      
2014 11  27.081829 01 29 46.57   +03 03 09.6   21.9z 480017    W84  C~1wzB      
2015 01  08.22155  01 28 38.629  +03 03 40.24  22.5w 480017    F51  C~1vXi      
2015 01  08.23394  01 28 38.641  +03 03 40.80  22.4w 480017    F51  C~1vXi      
2015 01  08.24634  01 28 38.633  +03 03 40.75  22.6w 480017    F51  C~1vXi      
2015 09  04.328866 01 41 55.44   +04 21 17.2   21.9z 480017    W84  C~1wzB      
2015 10  17.176574 01 38 59.93   +04 02 47.1   22.4r 480017    W84  C~1wzB      
2015 10  17.177940 01 38 59.92   +04 02 46.7   23.9g 480017    W84  C~1wzB      

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    -0.20       0.00    -1.09
  2   0.0000      0.00     0.03       0.00     0.05
  3   0.0001      0.00     0.03       0.00    -0.07
  4   0.0001      0.00     0.26       0.00     0.29
  5   0.9638      0.00    -0.23       0.00    -0.02
  6   0.9638      0.00     0.03       0.00    -0.05
  7   0.9639      0.00     0.17       0.00    -0.40
  8   2.0831      0.00     0.16       0.00     0.29
  9   2.0832      0.00     0.10       0.00     0.13
 10   2.0832      0.00    -0.06       0.00     0.26
 11   2.0832      0.00    -0.03       0.00     0.24
 12   2.9896      0.00     0.10       0.00     0.09
 13   2.9897      0.00    -0.08       0.00     0.03
 14   2.9897      0.00    -0.15       0.00     0.03
 15   2.9898      0.00     0.18       0.00    -0.07
 16   3.0904      0.00     0.05       0.00     0.04
 17   3.0904      0.00     0.07       0.00     0.02
 18   3.1313      0.00     0.14       0.00     0.02
 19   3.1313      0.00     0.21       0.00     0.04
 20   3.8853      0.00     0.10       0.00     0.16
 21   3.8854      0.00     0.25       0.00     0.07
 22   3.8854      0.00     0.18       0.00     0.14
 23   3.8854      0.00     0.12       0.00    -0.09
 24   3.8909      0.00    -0.05       0.00     0.08
 25   3.8909      0.00     0.14       0.00     0.10
 26   3.8910      0.00     0.13       0.00     0.13
 27   3.8910      0.00    -0.11       0.00     0.13
 28   3.9645      0.00    -0.01       0.00    -0.08
 29   3.9646      0.00    -0.01       0.00    -0.51
 30   3.9646      0.00    -0.12       0.00    -0.05
 31   3.9887      0.00    -0.17       0.00     0.08
 32   4.0406      0.00     0.05       0.00     0.09
 33   4.0406      0.00     0.13       0.00     0.05
 34   4.0461      0.00     0.07       0.00     0.12
 35   4.0597      0.00    -0.07       0.00     0.10
 36   4.0624      0.00     0.03       0.00     0.07
 37   4.1085      0.00     0.00       0.00     0.07
 38   4.1230      0.00    -0.05       0.00    -0.20
 39   4.1231      0.00     0.01       0.00    -0.26
 40   4.1231      0.00     0.26       0.00    -0.20
 41   4.1249      0.00     0.07       0.00    -0.01
 42   4.1414      0.00     0.11       0.00     0.14
 43   4.2568      0.00    -0.09       0.00    -0.23
 44   4.2568      0.00     0.04       0.00     0.16
 45   4.2569      0.00    -0.13       0.00    -0.05
 46   4.9114      0.00    -0.09       0.00     0.03
 47   5.0287      0.00     0.20       0.00     0.22
 48   5.0287      0.00     0.15       0.00    -0.15

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.

480017    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        67.298    67.298    67.297
ecceobj         0.455     0.455     0.455
incobj          7.288     7.288     7.288
qmin           36.011    35.996    36.011
qmax           99.190    99.188    98.670
amean          66.527    66.491    66.524
amin           65.480    65.467    65.481
amax           67.935    67.915    67.729
emean           0.447     0.447     0.447
emin            0.436     0.436     0.434
emax            0.460     0.460     0.457
imean           6.287     6.175     6.442
imin            5.772     5.570     5.975
imax            6.663     6.648     7.025
excite_mean     0.461     0.460     0.460
fracstop        1.000     1.000     1.000
cjmean          3.095     3.096     3.096

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       197.8     181.6     182.0
kozaiamp        180.0     180.0     179.9