Orbit Fit and Astrometric record for 13FY27

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: 13FY27    
# Created Thu Oct 19 01:38:12 2017
# Orbit generated from Bernstein formalism
# Fitting   22 observations of   22
# Arc:   4.10y
# First observation: 2013/03/17
#  Last observation: 2017/04/23
Preliminary a, adot, b, bdot, g, gdot:
   0.000015   0.005981  -0.000013   0.003473   0.012521   0.000000
# Chi-squared of fit:    74.80 DOF:   38 RMS:  0.33
# Min/Max residuals:    -1.21    0.51
# Exact a, adot, b, bdot, g, gdot:
  6.321687E-06  5.978983E-03  4.957379E-06  3.464613E-03  1.256772E-02 -1.033338E-03
# Covariance matrix:
  1.4130E-13 -4.0997E-14 -1.3129E-14  3.9942E-15  1.3371E-13  1.7661E-13
 -4.0997E-14  4.5646E-13 -7.5181E-14  2.9261E-13  2.2065E-13  2.0908E-11
 -1.3129E-14 -7.5181E-14  1.1349E-13 -8.8704E-14 -8.3573E-14 -3.9461E-12
  3.9942E-15  2.9261E-13 -8.8704E-14  2.4567E-13  1.8346E-13  1.4765E-11
  1.3371E-13  2.2065E-13 -8.3573E-14  1.8346E-13  5.3183E-13  1.2781E-11
  1.7661E-13  2.0908E-11 -3.9461E-12  1.4765E-11  1.2781E-11  1.0536E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
  -14.595458  163.675537   -0.222832   -0.244475   -0.939185  2456368.584188
# Heliocentric elements and errors
Epoch:              2456360.5000  =  2013/03/09
Mean Anomaly:          206.87801 +/-     0.418
Argument of Peri:      139.97625 +/-     0.413
Long of Asc Node:      187.02517 +/-     0.001
Inclination:            33.14825 +/-     0.001
Eccentricity:         0.39112182 +/-    0.0007
Semi-Major Axis:     58.81575721 +/-    0.0353
Time of Perihelion: 2526437.2637 +/-     180.4
Perihelion:          35.81163100 +/-    0.0472
Aphelion:            81.81988342 +/-    0.0647
Period (y)              451.0750 +/-      0.41
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -74.89029776 +/-    0.0043
Ecliptic Y           21.70422031 +/-    0.0013
Ecliptic Z          -20.05043140 +/-    0.0012
Ecliptic XDOT        -0.00034583 +/-    0.0000
Ecliptic YDOT        -0.00125718 +/-    0.0000
Ecliptic ZDOT         0.00078727 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   80.50869318 +/-    0.0040
Geocenter to KBO     79.56891862 +/-    0.0046
# Hcoef:  3.02

The following table shows the complete astrometric record for 13FY27. 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 (13FY27) followed by the observatory code and reference code for the source of the astrometry.

2013 03  17.08341  10 37 26.710  -07 03 55.19        13FY27    807  C~12gE      
2013 03  17.08342  10 37 26.69   -07 03 55.3   22.0r 13FY27    W84  C~2J9e      
2013 03  17.14652  10 37 26.558  -07 03 53.65  21.9r 13FY27    807  C~12gE      
2013 03  17.14653  10 37 26.53   -07 03 54.0         13FY27    W84  C~2J9e      
2013 03  17.21064  10 37 26.375  -07 03 52.37        13FY27    807  C~12gE      
2013 03  17.21065  10 37 26.37   -07 03 52.8         13FY27    W84  C~2J9e      
2013 05  07.96207  10 35 59.58   -06 46 57.1   22.2r 13FY27    W84  C~2J9e      
2013 05  07.98668  10 35 59.600  -06 46 56.10        13FY27    807  C~12gE      
2013 05  07.98669  10 35 59.56   -06 46 56.6         13FY27    W84  C~2J9e      
2013 05  08.00735  10 35 59.590  -06 46 55.86  21.9r 13FY27    807  C~12gE      
2013 05  08.09974  10 35 59.518  -06 46 54.16        13FY27    807  C~12gE      
2013 05  08.09975  10 35 59.48   -06 46 54.7         13FY27    W84  C~2J9e      
2013 05  08.97556  10 35 58.938  -06 46 39.15        13FY27    807  C~12gE      
2013 07  06.99167  10 36 37.616  -06 37 35.61        13FY27    304  C~12gE      
2013 07  07.97105  10 36 39.442  -06 37 35.46  22.0r 13FY27    304  C~12gE      
2014 03  24.00410  10 38 46.302  -06 58 36.40        13FY27    807  C~12gE      
2014 03  25.00225  10 38 44.052  -06 58 16.29        13FY27    807  C~12gE      
2014 03  26.00428  10 38 41.759  -06 57 55.99        13FY27    807  C~12gE      
2016 02  04.40193  10 43 56.06   -07 05 23.6   21.8R 13FY27    G37  C~1lwW      
2016 02  04.48554  10 43 55.83   -07 05 23.6         13FY27    G37  C~1lwW      
2017 04  21.97513  10 42 37.202  -06 39 27.69  21.7r 13FY27    304  C~2F8P      
2017 04  23.97732  10 42 34.358  -06 38 48.81  21.7r 13FY27    304  C~2F8P      

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     0.25       0.00    -0.12
  2   0.0000     -0.23     0.02      -0.22    -0.34
  3   0.0002     -2.68     0.15       0.55     0.17
  4   0.0002     -2.93    -0.10       0.07    -0.31
  5   0.0003     -5.69    -0.22       0.68     0.04
  6   0.0003     -5.59    -0.13       0.26    -0.38
  7   0.1420  -1589.41    -0.20     440.09    -0.46
  8   0.1421  -1589.52     0.11     441.12     0.29
  9   0.1421  -1589.88    -0.25     440.43    -0.40
 10   0.1422  -1589.75     0.23     441.29     0.22
 11   0.1424  -1591.40     0.14     442.44     0.31
 12   0.1424  -1591.71    -0.17     441.73    -0.40
 13   0.1448  -1605.16     0.32     452.97     0.51
 14   0.3064  -1282.79     0.20    1176.55     0.38
 15   0.3091  -1257.74    -0.40    1187.16     0.26
 16   1.0183    971.41     0.02     749.72     0.26
 17   1.0210    932.75     0.31     755.43     0.41
 18   1.0237    893.43    -0.19     761.06     0.28
 19   2.8866   5388.97    -0.05    2138.97    -0.21
 20   2.8868   5385.80    -0.20    2137.66    -1.21
 21   4.0983   3708.69     0.28    3128.80     0.31
 22   4.1037   3654.65    -0.13    3148.53     0.40

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.

13FY27    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        58.640    58.748    58.542
ecceobj         0.395     0.397     0.393
incobj         33.263    33.263    33.264
qmin           34.110    33.685    34.246
qmax           84.198    85.530    84.347
amean          58.669    59.091    58.696
amin           57.922    58.333    57.941
amax           59.567    60.033    59.616
emean           0.394     0.399     0.393
emin            0.374     0.372     0.372
emax            0.417     0.427     0.415
imean          32.849    32.871    32.840
imin           32.069    31.794    32.120
imax           33.641    33.884    33.623
excite_mean     0.670     0.674     0.670
fracstop        1.000     1.000     1.000
cjmean          2.669     2.667     2.670

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       183.3     184.5     181.5
kozaiamp        179.9     180.0     180.0