Orbit Fit and Astrometric record for 15FO345

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: 15FO345   
# Created Mon Oct 23 01:38:35 2017
# Orbit generated from Bernstein formalism
# Fitting   19 observations of   20
# Arc:   3.98y
# First observation: 2011/04/30
#  Last observation: 2015/04/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000036   0.031860  -0.000013   0.006480   0.029284   0.000000
# Chi-squared of fit:    11.78 DOF:   32 RMS:  0.14
# Min/Max residuals:    -0.40    0.35
# Exact a, adot, b, bdot, g, gdot:
  1.760849E-05  3.195904E-02  3.447927E-06  6.479907E-03  2.911868E-02  1.440503E-03
# Covariance matrix:
  3.6618E-13 -2.0545E-13  4.0367E-15 -2.1832E-14 -8.5031E-14 -8.8024E-13
 -2.0545E-13  6.4465E-13 -2.2100E-14  1.2634E-13  6.9539E-13  5.0566E-12
  4.0367E-15 -2.2100E-14  3.4559E-13 -1.0118E-13 -2.3373E-14 -1.8224E-13
 -2.1832E-14  1.2634E-13 -1.0118E-13  6.1376E-14  1.5825E-13  1.0558E-12
 -8.5031E-14  6.9539E-13 -2.3373E-14  1.5825E-13  1.5661E-12  6.2057E-12
 -8.8024E-13  5.0566E-12 -1.8224E-13  1.0558E-12  6.2057E-12  4.2185E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   17.198186 -152.508953   -0.208568    0.292266   -0.944439  2455681.895196
# Heliocentric elements and errors
Epoch:              2455680.5000  =  2011/04/29
Mean Anomaly:           19.16887 +/-     0.075
Argument of Peri:       31.80629 +/-     0.101
Long of Asc Node:      152.89253 +/-     0.001
Inclination:            20.15468 +/-     0.000
Eccentricity:         0.12800316 +/-    0.0001
Semi-Major Axis:     40.04011391 +/-    0.0062
Time of Perihelion: 2450752.9008 +/-      19.3
Perihelion:          34.91485281 +/-    0.0067
Aphelion:            45.16537500 +/-    0.0080
Period (y)              253.3676 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.87866173 +/-    0.0012
Ecliptic Y          -15.78578826 +/-    0.0007
Ecliptic Z           10.15438250 +/-    0.0004
Ecliptic XDOT         0.00143021 +/-    0.0000
Ecliptic YDOT        -0.00263624 +/-    0.0000
Ecliptic ZDOT         0.00062210 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.28508214 +/-    0.0011
Geocenter to KBO     34.34222097 +/-    0.0015
# Hcoef:  6.92

The following table shows the complete astrometric record for 15FO345. 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 (15FO345) followed by the observatory code and reference code for the source of the astrometry.

2011 04  30.39443  14 06 34.123  +05 30 05.26  22.3w 15FO345   F51  C~1vYW      
2011 04  30.40799  14 06 34.061  +05 30 05.52  22.5w 15FO345   F51  C~1vYW      
2011 04  30.42305  14 06 33.969  +05 30 06.08  22.5w 15FO345   F51  C~1vYW      
2011 04  30.43667  14 06 33.900  +05 30 06.29  22.6w 15FO345   F51  C~1vYW      
2014 04  05.42553  14 30 43.138  +04 20 39.87  21.6w 15FO345   F51  C~1wc3      
2014 04  05.43779  14 30 43.049  +04 20 41.93  22.4w 15FO345   F51  C~1vYW      
2014 04  05.45005  14 30 42.999  +04 20 42.45  22.7w 15FO345   F51  C~1vYW      
2014 04  05.46231  14 30 42.921  +04 20 43.01  22.5w 15FO345   F51  C~1vYW      
2014 05  25.38568  14 26 30.049  +04 43 04.67  22.5w 15FO345   F51  C~1vYW      
2014 05  25.39872  14 26 29.977  +04 43 04.63  22.5w 15FO345   F51  C~1vYW      
2014 05  25.41174  14 26 29.932  +04 43 04.86  22.6w 15FO345   F51  C~1vYW      
2014 05  25.42485  14 26 29.854  +04 43 05.03  22.8w 15FO345   F51  C~1vYW      
2015 03  22.50734  14 38 58.858  +03 52 10.47  22.7w 15FO345   F51  C~1vYW      
2015 03  22.52098  14 38 58.791  +03 52 10.69  22.7w 15FO345   F51  C~1vYW      
2015 03  22.53474  14 38 58.756  +03 52 11.87  22.7w 15FO345   F51  C~1vYW      
2015 03  22.54845  14 38 58.674  +03 52 11.82  22.5w 15FO345   F51  C~1vYW      
2015 04  23.49839  14 36 31.874  +04 12 20.10  22.2w 15FO345   F51  C~1vYW      
2015 04  23.51265  14 36 31.810  +04 12 20.37  22.5w 15FO345   F51  C~1vYW      
2015 04  23.52685  14 36 31.725  +04 12 20.88  22.6w 15FO345   F51  C~1vYW      
2015 04  23.54109  14 36 31.659  +04 12 21.59  22.3w 15FO345   F51  C~1vYW      

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    -0.05       0.00     0.01
  2   0.0000     -0.96     0.13      -0.09    -0.03
  3   0.0001     -2.44    -0.09      -0.05     0.05
  4   0.0001     -3.48     0.02      -0.22    -0.09
  5   2.9323  21789.96 (   1.02)   3898.57 (  -1.42)
  6   2.9324  21787.95     0.01    3900.02    -0.10
  7   2.9324  21787.06     0.12    3900.23    -0.02
  8   2.9324  21785.75    -0.19    3900.33    -0.05
  9   3.0691  17737.61     0.02    3776.53     0.22
 10   3.0691  17736.62    -0.06    3776.10    -0.01
 11   3.0692  17735.90     0.14    3776.07     0.16
 12   3.0692  17734.74    -0.09    3775.80     0.10
 13   3.8935  29440.11     0.13    5026.56     0.10
 14   3.8936  29439.07     0.04    5026.40    -0.31
 15   3.8936  29438.14     0.05    5027.31     0.35
 16   3.8936  29436.99    -0.15    5026.81    -0.40
 17   3.9811  26904.33    -0.11    5348.74     0.01
 18   3.9812  26903.32     0.12    5348.64    -0.10
 19   3.9812  26901.93    -0.04    5348.65    -0.10
 20   3.9812  26900.73    -0.01    5348.95     0.20

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.

15FO345    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        39.968    39.986    39.950
ecceobj         0.127     0.127     0.126
incobj         20.162    20.162    20.163
qmin           33.891    33.983    33.904
qmax           46.996    46.770    46.915
amean          40.245    40.251    40.254
amin           39.868    39.863    39.858
amax           40.645    40.643    40.647
emean           0.132     0.133     0.134
emin            0.113     0.113     0.114
emax            0.157     0.153     0.155
imean          19.431    19.526    19.481
imin           18.340    18.400    18.431
imax           20.399    20.559    20.581
excite_mean     0.358     0.360     0.359
fracstop        1.000     1.000     1.000
cjmean          2.910     2.908     2.908

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       177.1     177.9     178.9
kozaiamp        180.0     180.0     180.0