Orbit Fit and Astrometric record for 14XZ40

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: 14XZ40    
# Created Mon Dec 18 02:38:08 2017
# Orbit generated from Bernstein formalism
# Fitting   10 observations of   10
# Arc:  76.82d
# First observation: 2014/12/01
#  Last observation: 2015/02/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000038   0.028654   0.000020   0.007911   0.027100   0.000000
# Chi-squared of fit:     3.94 DOF:   14 RMS:  0.11
# Min/Max residuals:    -0.16    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.546729E-05  2.713626E-02  4.910691E-06  8.590347E-03  2.705684E-02  1.662448E-04
# Covariance matrix:
  4.6078E-13  3.6891E-13  8.1743E-15  1.1159E-13  1.6827E-12  2.6346E-10
  3.6891E-13  1.3628E-09  1.5307E-11 -4.8900E-10  2.0542E-10 -1.0153E-08
  8.1743E-15  1.5307E-11  4.4990E-13 -7.5254E-12  2.2291E-12 -1.4235E-10
  1.1159E-13 -4.8900E-10 -7.5254E-12  2.1048E-10 -6.8492E-11  5.1144E-09
  1.6827E-12  2.0542E-10  2.2291E-12 -6.8492E-11  4.1386E-11  4.8243E-10
  2.6346E-10 -1.0153E-08 -1.4235E-10  5.1144E-09  4.8243E-10  5.0344E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
  -42.726973   82.333593    0.233569   -0.649936   -0.703958  2456992.799343
# Heliocentric elements and errors
Epoch:              2456990.5000  =  2014/11/29
Mean Anomaly:            3.49452 +/-    23.232
Argument of Peri:      284.35648 +/-    26.133
Long of Asc Node:      146.98650 +/-     0.059
Inclination:            44.51914 +/-     0.014
Eccentricity:         0.05777077 +/-    0.0017
Semi-Major Axis:     39.97438031 +/-    0.0604
Time of Perihelion: 2456094.4016 +/-    5957.3
Perihelion:          37.66502974 +/-    0.0885
Aphelion:            42.28373088 +/-    0.0932
Period (y)              252.7440 +/-      0.57
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            3.97799112 +/-    0.0009
Ecliptic Y           27.82699352 +/-    0.0064
Ecliptic Z          -25.07697499 +/-    0.0060
Ecliptic XDOT        -0.00264519 +/-    0.0000
Ecliptic YDOT         0.00095803 +/-    0.0001
Ecliptic ZDOT         0.00062723 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.66989058 +/-    0.0062
Geocenter to KBO     36.95922962 +/-    0.0088
# Hcoef:  7.87

The following table shows the complete astrometric record for 14XZ40. 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 (14XZ40) followed by the observatory code and reference code for the source of the astrometry.

2014 12  01.298565 05 36 08.31   -19 26 46.7   23.6g 14XZ40    W84  C~1zPw      
2014 12  01.299931 05 36 08.30   -19 26 46.9   23.7r 14XZ40    W84  C~1zPw      
2014 12  01.301308 05 36 08.28   -19 26 46.8   22.8i 14XZ40    W84  C~1zPw      
2014 12  14.325625 05 34 53.69   -19 28 19.2   22.9i 14XZ40    W84  C~1zPw      
2014 12  17.317060 05 34 36.26   -19 28 13.0   23.2r 14XZ40    W84  C~1zPw      
2014 12  21.310428 05 34 13.02   -19 27 48.5   23.5r 14XZ40    W84  C~1zPw      
2014 12  27.291910 05 33 38.60   -19 26 36.3   23.6g 14XZ40    W84  C~1zPw      
2014 12  27.293275 05 33 38.59   -19 26 36.4   23.4i 14XZ40    W84  C~1zPw      
2015 02  15.120787 05 30 06.96   -18 52 43.6   22.9r 14XZ40    W84  C~2ICg      
2015 02  16.122222 05 30 04.91   -18 51 42.6   23.1r 14XZ40    W84  C~2ICg      

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     0.08       0.00     0.02
  2   0.0000     -0.15     0.04      -0.19    -0.16
  3   0.0000     -0.43    -0.13      -0.08    -0.03
  4   0.0357  -1058.88     0.02     -33.92     0.28
  5   0.0439  -1304.68     0.05     -14.35     0.18
  6   0.0548  -1631.58    -0.02      27.78    -0.11
  7   0.0712  -2113.93    -0.00     125.72    -0.04
  8   0.0712  -2114.07    -0.04     125.63    -0.16
  9   0.2076  -5008.03    -0.11    2306.84     0.09
 10   0.2103  -5034.21     0.12    2369.19    -0.08

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.

14XZ40    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.187    40.494    40.005
ecceobj         0.062     0.098     0.056
incobj         44.536    44.516    44.573
qmin           37.210    35.936    37.077
qmax           42.792    44.617    42.542
amean          39.894    40.167    39.709
amin           39.566    39.842    39.394
amax           40.204    40.500    40.019
emean           0.052     0.090     0.051
emin            0.043     0.080     0.040
emax            0.065     0.102     0.063
imean          43.399    43.359    43.432
imin           43.152    43.128    43.192
imax           43.642    43.603    43.673
excite_mean     0.689     0.693     0.689
fracstop        1.000     1.000     1.000
cjmean          2.425     2.422     2.424

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       174.8     188.8     178.8
kozaiamp        180.0     180.0     180.0