Orbit Fit and Astrometric record for 15FS345

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: 15FS345   
# Created Thu Jul 19 01:38:23 2018
# Orbit generated from Bernstein formalism
# Fitting   11 observations of   11
# Arc:   3.07y
# First observation: 2015/03/17
#  Last observation: 2018/04/10
Preliminary a, adot, b, bdot, g, gdot:
   0.000030   0.025918   0.000002   0.000708   0.024766   0.000000
# Chi-squared of fit:    15.38 DOF:   16 RMS:  0.21
# Min/Max residuals:    -0.40    0.44
# Exact a, adot, b, bdot, g, gdot:
  1.655443E-05  2.593688E-02  8.775482E-07  7.075244E-04  2.498673E-02 -1.049981E-03
# Covariance matrix:
  4.5692E-13 -8.3227E-13  1.0635E-14 -2.1703E-14  4.9634E-13 -1.0571E-11
 -8.3227E-13  3.4846E-12 -2.6544E-14  9.4496E-14 -6.5982E-13  4.7485E-11
  1.0635E-14 -2.6544E-14  2.0086E-13 -8.3824E-14  2.3571E-14 -3.7530E-13
 -2.1703E-14  9.4496E-14 -8.3824E-14  1.0749E-13 -2.1371E-14  1.3280E-12
  4.9634E-13 -6.5982E-13  2.3571E-14 -2.1371E-14  1.4839E-12 -9.4439E-12
 -1.0571E-11  4.7485E-11 -3.7530E-13  1.3280E-12 -9.4439E-12  6.6718E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.205590  161.752043   -0.246780    0.053862   -0.959099  2457098.786648
# Heliocentric elements and errors
Epoch:              2457090.5000  =  2015/03/09
Mean Anomaly:          347.03316 +/-     0.372
Argument of Peri:       80.80124 +/-     0.493
Long of Asc Node:       98.26516 +/-     0.011
Inclination:             3.48681 +/-     0.000
Eccentricity:         0.13079533 +/-    0.0002
Semi-Major Axis:     46.91519719 +/-    0.0127
Time of Perihelion: 2461318.1632 +/-     121.2
Perihelion:          40.77890832 +/-    0.0146
Aphelion:            53.05148607 +/-    0.0173
Period (y)              321.3502 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.94202267 +/-    0.0018
Ecliptic Y           12.57848006 +/-    0.0006
Ecliptic Z            2.23797822 +/-    0.0001
Ecliptic XDOT        -0.00078012 +/-    0.0000
Ecliptic YDOT        -0.00274213 +/-    0.0000
Ecliptic ZDOT         0.00007106 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.98423888 +/-    0.0018
Geocenter to KBO     40.02124903 +/-    0.0020
# Hcoef:  6.86

The following table shows the complete astrometric record for 15FS345. 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 (15FS345) followed by the observatory code and reference code for the source of the astrometry.

2015 03  17.28587  10 57 38.027  +10 07 02.63  22.9R 15FS345   568  C~1w1E      
2015 03  17.38040  10 57 37.591  +10 07 05.27        15FS345   568  C~1w1E      
2015 03  17.49595  10 57 37.066  +10 07 08.23        15FS345   568  C~1w1E      
2015 04  20.04979  10 55 28.351  +10 19 01.86  22.8R 15FS345   304  C~1w1E      
2015 04  20.08039  10 55 28.279  +10 19 02.58        15FS345   304  C~1w1E      
2015 05  21.97379  10 54 36.490  +10 22 06.21        15FS345   304  C~1w1E      
2015 05  23.04214  10 54 36.230  +10 22 02.99        15FS345   304  C~1w1E      
2016 03  08.18049  11 03 55.408  +09 30 52.12        15FS345   304  C~1w1E      
2016 03  09.26111  11 03 50.400  +09 31 22.86        15FS345   304  C~1w1E      
2018 04  10.16709  11 12 50.882  +08 39 12.19  22.3R 15FS345   G37  C~2bHP      
2018 04  10.21273  11 12 50.760  +08 39 12.93        15FS345   G37  C~2bHP      

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    -0.03       0.00    -0.09
  2   0.0003     -6.96    -0.08      -0.03    -0.01
  3   0.0006    -15.25     0.07      -0.27    -0.11
  4   0.0924  -2043.86    -0.03     -68.72     0.07
  5   0.0925  -2045.12     0.11     -68.46     0.44
  6   0.1798  -2821.64     0.25    -190.60    -0.28
  7   0.1828  -2823.96    -0.30    -195.04    -0.16
  8   0.9771   5985.03    -0.21     150.28     0.22
  9   0.9801   5904.76     0.20     149.87    -0.03
 10   3.0661  14519.25    -0.40     398.29    -0.08
 11   3.0662  14517.28     0.40     398.26     0.03

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.

15FS345    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.504    46.547    46.461
ecceobj         0.122     0.122     0.122
incobj          3.486     3.486     3.486
qmin           40.111    40.166    40.138
qmax           53.540    53.499    53.402
amean          46.626    46.669    46.596
amin           46.232    46.277    46.206
amax           47.076    47.094    47.046
emean           0.123     0.123     0.122
emin            0.110     0.110     0.109
emax            0.137     0.137     0.136
imean           1.817     1.821     1.813
imin            1.397     1.401     1.391
imax            2.250     2.250     2.246
excite_mean     0.127     0.127     0.126
fracstop        1.000     1.000     1.000
cjmean          3.114     3.115     3.114

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       186.2     185.5     186.4
kozaiamp        180.0     180.0     180.0