Orbit Fit and Astrometric record for 14XW40

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: 14XW40    
# Created Tue Dec 12 02:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting   26 observations of   26
# Arc: 108.84d
# First observation: 2014/12/01
#  Last observation: 2015/03/20
Preliminary a, adot, b, bdot, g, gdot:
   0.000005   0.026893   0.000012   0.002062   0.025426   0.000000
# Chi-squared of fit:    18.83 DOF:   46 RMS:  0.15
# Min/Max residuals:    -0.56    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.762247E-05  2.597098E-02  1.067232E-06  1.962177E-03  2.473611E-02 -6.100362E-03
# Covariance matrix:
  2.3908E-13 -2.1559E-12 -4.2627E-15 -3.2824E-13 -1.4720E-13  2.8497E-11
 -2.1559E-12  1.6178E-10  2.2086E-12  3.2058E-11  5.5197E-11  3.7330E-09
 -4.2627E-15  2.2086E-12  2.3153E-13 -4.4632E-13  9.0492E-13  7.6932E-11
 -3.2824E-13  3.2058E-11 -4.4632E-13  1.2132E-11  1.0731E-11  6.5189E-10
 -1.4720E-13  5.5197E-11  9.0492E-13  1.0731E-11  2.2248E-11  1.8517E-09
  2.8497E-11  3.7330E-09  7.6932E-11  6.5189E-10  1.8517E-09  1.9232E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
  -16.037530  159.835582    0.985990    0.004500    0.015058  2456993.083978
# Heliocentric elements and errors
Epoch:              2456990.5000  =  2014/11/29
Mean Anomaly:          323.52821 +/-     0.657
Argument of Peri:      349.99274 +/-     1.544
Long of Asc Node:      234.35484 +/-     0.021
Inclination:            16.50414 +/-     0.001
Eccentricity:         0.31787953 +/-    0.0170
Semi-Major Axis:     50.66585111 +/-    0.5677
Time of Perihelion: 2470335.7298 +/-      86.9
Perihelion:          34.56021395 +/-    0.9422
Aphelion:            66.77148826 +/-    1.1391
Period (y)              360.6461 +/-      6.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -36.12026080 +/-    0.0070
Ecliptic Y           14.31383048 +/-    0.0026
Ecliptic Z          -11.16855694 +/-    0.0021
Ecliptic XDOT        -0.00044224 +/-    0.0000
Ecliptic YDOT        -0.00290641 +/-    0.0000
Ecliptic ZDOT         0.00039536 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.42642264 +/-    0.0063
Geocenter to KBO     40.42672240 +/-    0.0077
# Hcoef:  6.10

The following table shows the complete astrometric record for 14XW40. 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 (14XW40) followed by the observatory code and reference code for the source of the astrometry.

2014 12  01.58320  10 21 25.841  -06 59 22.04  22.2w 14XW40    F51  C~1vXx      
2014 12  01.59510  10 21 25.861  -06 59 22.47  22.3w 14XW40    F51  C~1vXx      
2014 12  01.60775  10 21 25.854  -06 59 22.92  22.2w 14XW40    F51  C~1vXx      
2014 12  01.62143  10 21 25.876  -06 59 23.32  22.4w 14XW40    F51  C~1vXx      
2014 12  01.63438  10 21 25.868  -06 59 23.57  22.6w 14XW40    F51  C~1vXx      
2014 12  01.64628  10 21 25.865  -06 59 23.98  22.6w 14XW40    F51  C~1vXx      
2015 01  20.49294  10 19 51.316  -07 08 38.94  22.4w 14XW40    F51  C~1vXx      
2015 01  20.50612  10 19 51.272  -07 08 38.94  22.5w 14XW40    F51  C~1vXx      
2015 01  20.51925  10 19 51.232  -07 08 38.85  22.6w 14XW40    F51  C~1vXx      
2015 01  20.53241  10 19 51.169  -07 08 38.78  22.4w 14XW40    F51  C~1vXx      
2015 01  26.45070  10 19 27.753  -07 07 48.60  22.3w 14XW40    F51  C~1vXx      
2015 01  26.46209  10 19 27.702  -07 07 48.54  22.2w 14XW40    F51  C~1vXx      
2015 01  26.47344  10 19 27.657  -07 07 48.21  22.1w 14XW40    F51  C~1vXx      
2015 01  26.48481  10 19 27.606  -07 07 48.19  22.5w 14XW40    F51  C~1vXx      
2015 02  20.42149  10 17 34.938  -07 00 08.92  22.2w 14XW40    F51  C~1vXx      
2015 02  20.43447  10 17 34.882  -07 00 08.34  22.0w 14XW40    F51  C~1vXx      
2015 02  20.44716  10 17 34.817  -07 00 08.19  22.3w 14XW40    F51  C~1vXx      
2015 02  20.45984  10 17 34.750  -07 00 07.82  22.2w 14XW40    F51  C~1vXx      
2015 02  22.39578  10 17 25.592  -06 59 17.36  22.1w 14XW40    F51  C~1vXx      
2015 02  22.40870  10 17 25.492  -06 59 17.42  22.0w 14XW40    F51  C~1vXx      
2015 02  22.42194  10 17 25.439  -06 59 16.95  22.0w 14XW40    F51  C~1vXx      
2015 02  22.43491  10 17 25.390  -06 59 16.36  22.1w 14XW40    F51  C~1vXx      
2015 03  20.34669  10 15 28.098  -06 45 41.29  22.2w 14XW40    F51  C~1vXx      
2015 03  20.35939  10 15 28.059  -06 45 41.08  22.1w 14XW40    F51  C~1vXx      
2015 03  20.37208  10 15 28.000  -06 45 40.55  22.1w 14XW40    F51  C~1vXx      
2015 03  20.41946  10 15 27.801  -06 45 38.78  22.2w 14XW40    F51  C~1vXx      

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    -0.21       0.00     0.04
  2   0.0000      0.44     0.06      -0.29     0.04
  3   0.0001      0.51    -0.04      -0.74    -0.12
  4   0.0001      0.96     0.22      -0.99    -0.03
  5   0.0001      0.95     0.03      -1.27    -0.00
  6   0.0002      1.06    -0.02      -1.66    -0.11
  7   0.1366  -1093.82    -0.20   -1045.81     0.14
  8   0.1367  -1094.42    -0.07   -1046.06     0.10
  9   0.1367  -1095.01     0.08   -1046.20     0.17
 10   0.1368  -1095.90    -0.07   -1046.49     0.09
 11   0.1530  -1437.64     0.13   -1131.44     0.11
 12   0.1530  -1438.36     0.11   -1131.67     0.04
 13   0.1530  -1439.11     0.06   -1131.62     0.25
 14   0.1531  -1439.82     0.05   -1131.88     0.14
 15   0.2213  -3166.51    -0.04   -1340.05    -0.22
 16   0.2214  -3167.51    -0.04   -1339.83     0.05
 17   0.2214  -3168.46    -0.02   -1340.06    -0.14
 18   0.2214  -3169.52    -0.12   -1340.09    -0.13
 19   0.2267  -3314.87     0.19   -1344.95     0.03
 20   0.2268  -3316.22    -0.18   -1345.56    -0.56
 21   0.2268  -3317.13    -0.07   -1345.43    -0.39
 22   0.2268  -3318.03     0.03   -1345.16    -0.08
 23   0.2978  -5244.20    -0.12   -1252.22     0.20
 24   0.2978  -5244.81     0.17   -1252.25     0.06
 25   0.2978  -5245.83     0.06   -1252.09     0.11
 26   0.2980  -5249.25     0.02   -1251.57     0.21

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.

14XW40    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        50.145    51.678    48.985
ecceobj         0.312     0.357     0.269
incobj         16.500    16.500    16.499
qmin           33.500    31.075    34.526
qmax           68.101    73.589    64.251
amean          50.415    50.719    49.061
amin           49.804    46.924    48.540
amax           51.119    52.719    49.679
emean           0.317     0.358     0.276
emin            0.301     0.313     0.259
emax            0.334     0.397     0.295
imean          17.489    16.505    17.244
imin           16.726    14.546    16.513
imax           18.151    18.018    17.990
excite_mean     0.437     0.458     0.405
fracstop        1.000     1.000     1.000
cjmean          2.937     2.916     2.957

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       166.1     177.0     167.7
kozaiamp        180.0     180.0     180.0