Orbit Fit and Astrometric record for 14XU40

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: 14XU40    
# Created Mon Oct 23 01:38:32 2017
# Orbit generated from Bernstein formalism
# Fitting   13 observations of   13
# Arc:   2.26y
# First observation: 2012/10/22
#  Last observation: 2015/01/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000032   0.032729  -0.000004  -0.002623   0.030119   0.000000
# Chi-squared of fit:     7.82 DOF:   20 RMS:  0.14
# Min/Max residuals:    -0.33    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.776206E-05  3.199729E-02 -1.606860E-06 -2.600595E-03  2.903549E-02 -4.020157E-03
# Covariance matrix:
  4.8558E-13 -1.1064E-12 -1.4959E-14  7.8472E-14 -7.7093E-13 -1.2942E-11
 -1.1064E-12  1.1569E-11  1.6717E-13 -8.9158E-13  1.1032E-11  1.4720E-10
 -1.4959E-14  1.6717E-13  4.0257E-13 -2.1422E-13  1.4855E-13  2.3098E-12
  7.8472E-14 -8.9158E-13 -2.1422E-13  2.1276E-13 -8.0210E-13 -1.2198E-11
 -7.7093E-13  1.1032E-11  1.4855E-13 -8.0210E-13  1.1427E-11  1.3253E-10
 -1.2942E-11  1.4720E-10  2.3098E-12 -1.2198E-11  1.3253E-10  2.0127E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.081700   66.563253    0.600877    0.014964   -0.789682  2456223.052738
# Heliocentric elements and errors
Epoch:              2456220.5000  =  2012/10/20
Mean Anomaly:          316.88083 +/-     0.123
Argument of Peri:      226.82144 +/-     0.236
Long of Asc Node:      258.41958 +/-     0.001
Inclination:             4.74873 +/-     0.001
Eccentricity:         0.17989050 +/-    0.0014
Semi-Major Axis:     39.72209799 +/-    0.0274
Time of Perihelion: 2467173.0344 +/-      29.1
Perihelion:          32.57646985 +/-    0.0587
Aphelion:            46.86772614 +/-    0.0632
Period (y)              250.3551 +/-      0.26
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           14.56244075 +/-    0.0016
Ecliptic Y           32.08186789 +/-    0.0037
Ecliptic Z            0.65009803 +/-    0.0001
Ecliptic XDOT        -0.00292311 +/-    0.0000
Ecliptic YDOT         0.00085862 +/-    0.0000
Ecliptic ZDOT        -0.00025220 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.23823996 +/-    0.0034
Geocenter to KBO     34.44060604 +/-    0.0040
# Hcoef:  6.87

The following table shows the complete astrometric record for 14XU40. 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 (14XU40) followed by the observatory code and reference code for the source of the astrometry.

2012 10  22.55196  04 18 02.608  +22 28 15.59  22.4w 14XU40    F51  C~1vXw      
2012 10  22.56640  04 18 02.547  +22 28 15.47  22.4w 14XU40    F51  C~1vXw      
2012 10  22.58085  04 18 02.479  +22 28 15.13  22.4w 14XU40    F51  C~1vXw      
2013 12  03.30952  04 22 06.511  +22 28 01.66  22.4w 14XU40    F51  C~1vXw      
2013 12  03.32365  04 22 06.407  +22 28 01.15  22.4w 14XU40    F51  C~1vXw      
2013 12  03.33783  04 22 06.330  +22 28 00.99  22.4w 14XU40    F51  C~1vXw      
2014 12  13.29011  04 29 12.059  +22 34 18.54  22.3w 14XU40    F51  C~1vXw      
2014 12  13.30273  04 29 11.974  +22 34 18.29  22.6w 14XU40    F51  C~1vXw      
2014 12  13.31539  04 29 11.876  +22 34 18.25  22.3w 14XU40    F51  C~1vXw      
2014 12  13.32811  04 29 11.825  +22 34 17.83  22.6w 14XU40    F51  C~1vXw      
2015 01  24.32494  04 25 50.425  +22 25 20.33  22.2w 14XU40    F51  C~1vXw      
2015 01  24.35392  04 25 50.326  +22 25 20.11  22.3w 14XU40    F51  C~1vXw      
2015 01  24.36845  04 25 50.291  +22 25 19.75  22.1w 14XU40    F51  C~1vXw      

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    -0.07       0.00     0.04
  2   0.0000     -0.85     0.04       0.03     0.07
  3   0.0001     -1.84     0.02      -0.15    -0.10
  4   1.1136   3330.79     0.12    -581.32     0.13
  5   1.1137   3329.28    -0.14    -581.58    -0.12
  6   1.1137   3328.20     0.03    -581.57    -0.09
  7   2.1403   9218.28     0.12   -1145.52     0.18
  8   2.1403   9217.07     0.01   -1145.58     0.13
  9   2.1404   9215.72    -0.24   -1145.41     0.32
 10   2.1404   9214.96     0.10   -1145.72     0.03
 11   2.2554   6370.09     0.06   -1242.12    -0.17
 12   2.2554   6368.69    -0.08   -1242.12    -0.09
 13   2.2555   6368.16     0.01   -1242.40    -0.33

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.

14XU40    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.786    39.848    39.726
ecceobj         0.178     0.181     0.175
incobj          4.749     4.750     4.749
qmin           31.911    31.774    31.953
qmax           47.431    47.486    47.301
amean          39.456    39.457    39.456
amin           39.116    39.059    39.131
amax           39.871    39.903    39.825
emean           0.172     0.174     0.171
emin            0.155     0.157     0.153
emax            0.191     0.192     0.189
imean           6.392     6.398     6.379
imin            5.821     5.805     5.801
imax            6.985     7.010     7.026
excite_mean     0.205     0.207     0.204
fracstop        1.000     1.000     1.000
cjmean          3.004     3.003     3.004

libcent 0       180.1     180.1     180.3
libamp  0        33.5      65.7      20.7
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     180.1     177.8
kozaiamp        180.0     180.0     180.0