Orbit Fit and Astrometric record for 14UN225

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: 14UN225   
# Created Sat Dec 16 02:38:06 2017
# Orbit generated from Bernstein formalism
# Fitting   13 observations of   13
# Arc:   1.94y
# First observation: 2014/10/22
#  Last observation: 2016/09/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000008   0.019128   0.000004  -0.008597   0.021312   0.000000
# Chi-squared of fit:     2.05 DOF:   20 RMS:  0.07
# Min/Max residuals:    -0.13    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.398488E-05  1.875257E-02 -6.104514E-06 -8.374009E-03  2.136403E-02 -6.672590E-03
# Covariance matrix:
  3.1693E-13 -9.4024E-12 -4.6815E-15  5.0945E-12 -1.1136E-12 -2.3419E-10
 -9.4024E-12  5.8131E-10 -5.5266E-13 -3.1646E-10  7.9098E-11  1.4629E-08
 -4.6815E-15 -5.5266E-13  3.5761E-13 -1.0136E-13 -2.2436E-12 -1.7899E-11
  5.0945E-12 -3.1646E-10 -1.0136E-13  1.7298E-10 -3.9487E-11 -7.9593E-09
 -1.1136E-12  7.9098E-11 -2.2436E-12 -3.9487E-11  3.5458E-11  2.0365E-09
 -2.3419E-10  1.4629E-08 -1.7899E-11 -7.9593E-09  2.0365E-09  3.6833E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
  -49.713959  -51.678689   -0.981503   -0.133709   -0.113544  2456952.515500
# Heliocentric elements and errors
Epoch:              2456950.5000  =  2014/10/20
Mean Anomaly:          322.56835 +/-     1.354
Argument of Peri:      324.54283 +/-     1.783
Long of Asc Node:       68.72940 +/-     0.030
Inclination:            53.16259 +/-     0.008
Eccentricity:         0.35424799 +/-    0.0306
Semi-Major Axis:     59.34350062 +/-    1.4173
Time of Perihelion: 2474312.2952 +/-      86.0
Perihelion:          38.32118458 +/-    2.0351
Aphelion:            80.36581666 +/-    2.6435
Period (y)              457.1597 +/-     16.38
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           19.64370873 +/-    0.0052
Ecliptic Y          -23.27229815 +/-    0.0066
Ecliptic Z          -35.70629235 +/-    0.0099
Ecliptic XDOT         0.00103049 +/-    0.0000
Ecliptic YDOT         0.00256140 +/-    0.0000
Ecliptic ZDOT        -0.00004150 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   46.92988885 +/-    0.0085
Geocenter to KBO     46.80764025 +/-    0.0130
# Hcoef:  5.80

The following table shows the complete astrometric record for 14UN225. 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 (14UN225) followed by the observatory code and reference code for the source of the astrometry.

2014 10  22.014722 22 31 59.86   -64 22 41.3         14UN225   W84  C~2HPR      
2014 10  22.080139 22 31 59.53   -64 22 38.4         14UN225   W84  C~2HPR      
2014 10  27.026157 22 31 37.72   -64 18 58.0   22.2r 14UN225   W84  C~2HPR      
2014 10  28.057569 22 31 33.64   -64 18 09.5   21.7z 14UN225   W84  C~2HPR      
2014 10  28.058947 22 31 33.63   -64 18 09.4   22.2r 14UN225   W84  C~2HPR      
2014 10  28.060324 22 31 33.65   -64 18 09.4   21.8i 14UN225   W84  C~2HPR      
2014 10  29.060521 22 31 29.90   -64 17 21.2   21.6z 14UN225   W84  C~2HPR      
2014 10  29.075752 22 31 29.82   -64 17 20.7   21.8i 14UN225   W84  C~2HPR      
2014 11  13.027083 22 30 54.30   -64 04 01.3   23.1g 14UN225   W84  C~2HPR      
2016 09  29.112269 22 55 49.68   -64 00 45.2   21.8i 14UN225   W84  C~2HPR      
2016 09  29.113646 22 55 49.66   -64 00 45.2   22.0r 14UN225   W84  C~2HPR      
2016 09  29.115023 22 55 49.66   -64 00 45.2   22.9g 14UN225   W84  C~2HPR      
2016 09  30.115833 22 55 41.58   -64 00 28.9   21.7z 14UN225   W84  C~2HPR      

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    -0.02       0.00    -0.02
  2   0.0002     -0.10     0.02       3.60     0.10
  3   0.0137      9.08     0.04     265.43    -0.08
  4   0.0165     14.87    -0.11     320.40    -0.02
  5   0.0165     14.87    -0.11     320.52     0.02
  6   0.0166     14.98    -0.01     320.45    -0.13
  7   0.0193     22.33     0.22     373.97     0.11
  8   0.0193     22.19    -0.03     374.68    -0.01
  9   0.0603    285.06    -0.01    1164.50     0.02
 10   1.9387   8213.34     0.01   -4635.95     0.00
 11   1.9387   8213.24    -0.04   -4635.86     0.02
 12   1.9387   8213.24     0.00   -4635.86    -0.04
 13   1.9414   8183.06     0.03   -4589.10     0.02

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.

14UN225    quality flag:1

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        59.960    64.847    56.791
ecceobj         0.359     0.445     0.277
incobj         53.223    53.201    53.246
qmin           37.143    34.556    40.475
qmax           83.328    95.808    73.495
amean          59.711    64.520    56.597
amin           59.115    63.775    56.065
amax           60.517    65.529    57.233
emean           0.354     0.441     0.269
emin            0.341     0.428     0.259
emax            0.377     0.464     0.285
imean          51.955    51.916    51.997
imin           51.494    51.323    51.715
imax           52.355    52.412    52.305
excite_mean     0.863     0.902     0.833
fracstop        1.000     1.000     1.000
cjmean          2.128     2.088     2.158

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       145.2     138.6     171.0
kozaiamp        180.0     180.0     180.0