Orbit Fit and Astrometric record for 15FL345

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: 15FL345   
# Created Fri Dec 15 02:38:07 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:   2.03y
# First observation: 2013/04/10
#  Last observation: 2015/04/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000029   0.021417  -0.000003   0.000077   0.022415   0.000000
# Chi-squared of fit:     7.60 DOF:   34 RMS:  0.11
# Min/Max residuals:    -0.27    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.505685E-05  2.128263E-02 -3.237679E-07  7.596774E-05  2.269607E-02 -2.655438E-03
# Covariance matrix:
  3.6651E-13 -4.2885E-13 -1.3556E-15 -3.5601E-16 -2.4920E-13 -5.7468E-12
 -4.2885E-13  2.6101E-12 -9.1600E-15  5.2708E-15  2.4664E-13  5.2838E-11
 -1.3556E-15 -9.1600E-15  2.8626E-13 -1.5610E-13  9.4508E-15 -1.9525E-13
 -3.5601E-16  5.2708E-15 -1.5610E-13  1.1440E-13 -4.4618E-16  1.1171E-13
 -2.4920E-13  2.4664E-13  9.4508E-15 -4.4618E-16  1.0009E-12  5.0974E-12
 -5.7468E-12  5.2838E-11 -1.9525E-13  1.1171E-13  5.0974E-12  1.1187E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    5.478854 -155.175477    0.073289    0.095587   -0.996271  2456392.920438
# Heliocentric elements and errors
Epoch:              2456390.5000  =  2013/04/08
Mean Anomaly:          284.61593 +/-     0.099
Argument of Peri:      177.57581 +/-     0.093
Long of Asc Node:      116.76379 +/-     0.010
Inclination:             5.36091 +/-     0.000
Eccentricity:         0.12454409 +/-    0.0016
Semi-Major Axis:     45.80477318 +/-    0.0148
Time of Perihelion: 2480101.0502 +/-      29.0
Perihelion:          40.10005919 +/-    0.0729
Aphelion:            51.50948717 +/-    0.0737
Period (y)              310.0090 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -40.74470230 +/-    0.0018
Ecliptic Y          -18.76561190 +/-    0.0008
Ecliptic Z            4.20683707 +/-    0.0002
Ecliptic XDOT         0.00136177 +/-    0.0000
Ecliptic YDOT        -0.00219553 +/-    0.0000
Ecliptic ZDOT        -0.00002132 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.05525978 +/-    0.0016
Geocenter to KBO     44.06048272 +/-    0.0019
# Hcoef:  5.71

The following table shows the complete astrometric record for 15FL345. 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 (15FL345) followed by the observatory code and reference code for the source of the astrometry.

2013 04  10.41966  13 40 01.615  -04 30 37.50  22.1w 15FL345   F51  C~1vYV      
2013 04  10.43331  13 40 01.556  -04 30 37.29  22.1w 15FL345   F51  C~1vYV      
2013 04  10.44699  13 40 01.504  -04 30 36.89  22.1w 15FL345   F51  C~1vYV      
2013 04  10.46070  13 40 01.438  -04 30 36.54  22.2w 15FL345   F51  C~1vYV      
2014 02  28.50522  13 47 02.961  -05 13 24.23  22.5w 15FL345   F51  C~1vYV      
2014 02  28.51644  13 47 02.919  -05 13 24.15  22.3w 15FL345   F51  C~1vYV      
2014 02  28.52768  13 47 02.893  -05 13 23.93  22.5w 15FL345   F51  C~1vYV      
2014 02  28.53895  13 47 02.873  -05 13 23.65  22.2w 15FL345   F51  C~1vYV      
2015 03  21.48006  13 50 34.687  -05 31 44.46  22.3w 15FL345   F51  C~1vYV      
2015 03  21.49139  13 50 34.649  -05 31 44.22  22.3w 15FL345   F51  C~1vYV      
2015 03  21.50267  13 50 34.605  -05 31 44.16  22.3w 15FL345   F51  C~1vYV      
2015 03  21.51396  13 50 34.568  -05 31 43.86  22.2w 15FL345   F51  C~1vYV      
2015 03  22.45604  13 50 31.151  -05 31 20.93  22.7w 15FL345   F51  C~1vYV      
2015 03  22.46767  13 50 31.082  -05 31 20.51  22.2w 15FL345   F51  C~1vYV      
2015 03  22.47933  13 50 31.051  -05 31 20.10  22.4w 15FL345   F51  C~1vYV      
2015 03  22.49096  13 50 31.009  -05 31 19.80  22.4w 15FL345   F51  C~1vYV      
2015 04  20.38581  13 48 32.990  -05 19 19.46  22.3w 15FL345   F51  C~1vYV      
2015 04  20.39935  13 48 32.910  -05 19 19.02  22.0w 15FL345   F51  C~1vYV      
2015 04  20.41283  13 48 32.870  -05 19 19.04  22.3w 15FL345   F51  C~1vYV      
2015 04  20.42628  13 48 32.812  -05 19 18.43  22.2w 15FL345   F51  C~1vYV      

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     0.08
  2   0.0000     -0.90    -0.00      -0.12    -0.05
  3   0.0001     -1.77     0.07      -0.03     0.04
  4   0.0001     -2.81    -0.02      -0.06     0.00
  5   0.8873   6801.75     0.05    -120.63     0.09
  6   0.8873   6801.14    -0.08    -120.78    -0.12
  7   0.8874   6800.69    -0.04    -120.71    -0.11
  8   0.8874   6800.31     0.07    -120.56    -0.01
  9   1.9440  10153.59    -0.15     -12.10     0.16
 10   1.9441  10152.97    -0.08     -12.08     0.14
 11   1.9441  10152.33    -0.04     -12.26    -0.07
 12   1.9441  10151.71     0.02     -12.18    -0.02
 13   1.9467  10095.73     0.30      -9.05    -0.03
 14   1.9467  10094.61    -0.11      -9.03    -0.04
 15   1.9468  10094.03     0.03      -8.81     0.15
 16   1.9468  10093.34     0.04      -8.76     0.17
 17   2.0259   8186.11     0.08      31.33    -0.05
 18   2.0260   8184.84    -0.26      31.32    -0.05
 19   2.0260   8184.29     0.13      31.08    -0.27
 20   2.0260   8183.26     0.04      31.34    -0.00

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.

15FL345    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.618    45.657    45.581
ecceobj         0.126     0.130     0.123
incobj          5.361     5.361     5.361
qmin           39.534    39.412    39.628
qmax           52.683    52.904    52.468
amean          45.945    45.986    45.907
amin           45.566    45.602    45.525
amax           46.376    46.412    46.322
emean           0.124     0.127     0.121
emin            0.110     0.113     0.107
emax            0.137     0.140     0.133
imean           3.771     3.767     3.775
imin            3.349     3.343     3.351
imax            4.290     4.293     4.287
excite_mean     0.140     0.143     0.138
fracstop        1.000     1.000     1.000
cjmean          3.101     3.101     3.102

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       185.9     186.3     185.8
kozaiamp        180.0     179.9     180.0