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 Mon Jul 23 01:38:02 2018
# Orbit generated from Bernstein formalism
# Fitting   19 observations of   19
# Arc:   5.07y
# First observation: 2013/03/17
#  Last observation: 2018/04/12
Preliminary a, adot, b, bdot, g, gdot:
   0.000018   0.005985  -0.000020   0.003478   0.012521   0.000000
# Chi-squared of fit:    57.79 DOF:   32 RMS:  0.31
# Min/Max residuals:    -1.23    0.52
# Exact a, adot, b, bdot, g, gdot:
  6.997387E-06  5.979831E-03  4.842684E-06  3.465393E-03  1.256851E-02 -9.990327E-04
# Covariance matrix:
  1.9127E-13 -9.0881E-14 -4.1309E-15 -3.2732E-14  1.2854E-13 -2.0543E-12
 -9.0881E-14  3.2103E-13 -7.3598E-14  2.1126E-13  8.9451E-14  1.2385E-11
 -4.1309E-15 -7.3598E-14  1.5623E-13 -9.0232E-14 -7.4448E-14 -3.1531E-12
 -3.2732E-14  2.1126E-13 -9.0232E-14  1.7444E-13  8.2675E-14  8.8285E-12
  1.2854E-13  8.9451E-14 -7.4448E-14  8.2675E-14  4.5345E-13  4.4490E-12
 -2.0543E-12  1.2385E-11 -3.1531E-12  8.8285E-12  4.4490E-12  5.1690E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -14.595518  163.675470   -0.222833   -0.244475   -0.939185  2456368.584198
# Heliocentric elements and errors
Epoch:              2456360.5000  =  2013/03/09
Mean Anomaly:          205.95120 +/-     0.289
Argument of Peri:      140.41468 +/-     0.289
Long of Asc Node:      187.02380 +/-     0.001
Inclination:            33.14979 +/-     0.001
Eccentricity:         0.39038654 +/-    0.0005
Semi-Major Axis:     58.77801928 +/-    0.0228
Time of Perihelion: 2526793.5766 +/-     125.5
Perihelion:          35.83187151 +/-    0.0336
Aphelion:            81.72416705 +/-    0.0440
Period (y)              450.6409 +/-      0.26
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -74.88561231 +/-    0.0040
Ecliptic Y           21.70288531 +/-    0.0012
Ecliptic Z          -20.04925839 +/-    0.0011
Ecliptic XDOT        -0.00035285 +/-    0.0000
Ecliptic YDOT        -0.00125523 +/-    0.0000
Ecliptic ZDOT         0.00078550 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   80.50368267 +/-    0.0037
Geocenter to KBO     79.56390847 +/-    0.0043
# Hcoef:  3.03

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  17.08342  10 37 26.69   -07 03 55.3   22.0r 13FY27    W84  C~2J9e      
2013 03  17.14653  10 37 26.53   -07 03 54.0         13FY27    W84  C~2J9e      
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  07.98669  10 35 59.56   -06 46 56.6         13FY27    W84  C~2J9e      
2013 05  08.09975  10 35 59.48   -06 46 54.7         13FY27    W84  C~2J9e      
2013 05  08.97557  10 35 58.88   -06 46 39.8         13FY27    W84  C~2TH2      
2013 05  10.10498  10 35 58.16   -06 46 20.8   22.1r 13FY27    W84  C~2TH2      
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      
2018 04  11.99354  10 44 29.557  -06 39 42.30  21.8r 13FY27    807  C~2dXS      
2018 04  12.98316  10 44 27.770  -06 39 21.98  21.9r 13FY27    807  C~2dXS      

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     0.11       0.00    -0.10
  2   0.0002     -2.70    -0.00       0.28    -0.07
  3   0.0003     -5.36    -0.03       0.48    -0.14
  4   0.1420  -1589.18    -0.03     440.30    -0.26
  5   0.1421  -1589.65    -0.08     440.65    -0.20
  6   0.1424  -1591.48    -0.00     441.94    -0.21
  7   0.1448  -1605.47    -0.05     452.25    -0.23
  8   0.1479  -1622.69     0.08     465.65    -0.18
  9   0.3064  -1282.56     0.32    1176.76     0.52
 10   0.3091  -1257.50    -0.27    1187.38     0.39
 11   1.0183    971.64    -0.01     749.94     0.37
 12   1.0210    932.98     0.27     755.64     0.51
 13   1.0237    893.66    -0.22     761.27     0.38
 14   2.8866   5389.20    -0.04    2139.18    -0.23
 15   2.8868   5386.04    -0.19    2137.88    -1.23
 16   4.0983   3708.92     0.26    3129.01     0.32
 17   4.1037   3654.88    -0.15    3148.75     0.41
 18   5.0703   5262.77     0.06    3755.09    -0.20
 19   5.0730   5230.38    -0.03    3763.73     0.16

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        58.603    58.672    58.539
ecceobj         0.395     0.396     0.393
incobj         33.265    33.264    33.265
qmin           34.353    34.276    34.393
qmax           84.261    84.421    84.225
amean          58.733    58.838    58.725
amin           58.073    58.187    58.091
amax           59.585    59.665    59.603
emean           0.393     0.395     0.393
emin            0.374     0.375     0.373
emax            0.415     0.415     0.413
imean          32.883    32.882    32.880
imin           32.229    32.226    32.242
imax           33.634    33.653    33.608
excite_mean     0.670     0.671     0.670
fracstop        1.000     1.000     1.000
cjmean          2.669     2.668     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       181.0     180.8     181.1
kozaiamp        179.9     180.0     179.9