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 Jul 16 01:38:17 2018
# Orbit generated from Bernstein formalism
# Fitting   12 observations of   12
# Arc:   3.05y
# First observation: 2014/12/01
#  Last observation: 2017/12/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000048   0.027142  -0.000007   0.008590   0.026812   0.000000
# Chi-squared of fit:     4.45 DOF:   18 RMS:  0.11
# Min/Max residuals:    -0.23    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.557488E-05  2.711670E-02  4.663384E-06  8.598264E-03  2.705477E-02  5.011835E-04
# Covariance matrix:
  2.7995E-13 -1.1388E-13 -1.8716E-14 -1.3386E-14  3.1388E-13 -7.6405E-13
 -1.1388E-13  6.5194E-11 -1.9702E-12  2.2792E-11  1.3762E-11  8.6188E-10
 -1.8716E-14 -1.9702E-12  2.1755E-13 -7.4692E-13 -4.6981E-13 -2.6086E-11
 -1.3386E-14  2.2792E-11 -7.4692E-13  8.0789E-12  4.8366E-12  3.0177E-10
  3.1388E-13  1.3762E-11 -4.6981E-13  4.8366E-12  3.7583E-12  1.8223E-10
 -7.6405E-13  8.6188E-10 -2.6086E-11  3.0177E-10  1.8223E-10  1.1412E-08
#      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:           14.33121 +/-     3.156
Argument of Peri:      272.16680 +/-     3.583
Long of Asc Node:      146.96667 +/-     0.005
Inclination:            44.52384 +/-     0.001
Eccentricity:         0.05900990 +/-    0.0015
Semi-Major Axis:     39.94723224 +/-    0.0222
Time of Perihelion: 2453319.2933 +/-     808.6
Perihelion:          37.58995025 +/-    0.0646
Aphelion:            42.30451422 +/-    0.0655
Period (y)              252.4865 +/-      0.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            3.97826379 +/-    0.0003
Ecliptic Y           27.82904930 +/-    0.0019
Ecliptic Z          -25.07890286 +/-    0.0018
Ecliptic XDOT        -0.00264004 +/-    0.0000
Ecliptic YDOT         0.00098305 +/-    0.0000
Ecliptic ZDOT         0.00060487 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.67272138 +/-    0.0019
Geocenter to KBO     36.96206107 +/-    0.0026
# Hcoef:  7.84

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      
2017 12  20.29703  05 53 28.912  -17 41 21.36  23.1R 14XZ40    G37              
2017 12  20.33267  05 53 28.708  -17 41 21.06        14XZ40    G37              

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     0.06       0.00     0.07
  2   0.0000     -0.15     0.01      -0.19    -0.10
  3   0.0000     -0.43    -0.15      -0.08     0.03
  4   0.0357  -1058.88     0.03     -33.92     0.27
  5   0.0439  -1304.68     0.06     -14.35     0.15
  6   0.0548  -1631.58     0.00      27.78    -0.15
  7   0.0712  -2113.93     0.02     125.72    -0.11
  8   0.0712  -2114.07    -0.02     125.63    -0.23
  9   0.2076  -5008.03    -0.12    2306.84     0.11
 10   0.2103  -5034.21     0.11    2369.19    -0.05
 11   3.0527  15224.95    -0.04    5307.44    -0.05
 12   3.0528  15222.05     0.04    5307.98     0.05

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        40.163    40.268    40.069
ecceobj         0.064     0.071     0.059
incobj         44.540    44.537    44.544
qmin           37.148    36.989    37.177
qmax           42.840    43.136    42.566
amean          39.867    39.974    39.767
amin           39.565    39.614    39.466
amax           40.182    40.336    40.087
emean           0.055     0.055     0.051
emin            0.046     0.042     0.042
emax            0.066     0.072     0.062
imean          43.398    43.417    43.398
imin           43.156    43.146    43.173
imax           43.650    43.678    43.636
excite_mean     0.689     0.690     0.689
fracstop        1.000     1.000     1.000
cjmean          2.425     2.425     2.425

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       177.6     170.2     180.6
kozaiamp        179.9     180.0     180.0