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 Sat Dec 16 02:38:10 2017
# Orbit generated from Bernstein formalism
# Fitting    9 observations of    9
# Arc:   0.98y
# First observation: 2015/03/17
#  Last observation: 2016/03/09
Preliminary a, adot, b, bdot, g, gdot:
  -0.000017   0.026047   0.000001   0.000710   0.024699   0.000000
# Chi-squared of fit:     9.85 DOF:   12 RMS:  0.18
# Min/Max residuals:    -0.28    0.45
# Exact a, adot, b, bdot, g, gdot:
  1.652081E-05  2.593313E-02  7.539284E-07  7.079481E-04  2.498542E-02 -1.187229E-03
# Covariance matrix:
  4.9630E-13  2.8990E-12  1.5110E-14  7.9369E-14  1.8035E-12  1.2692E-10
  2.8990E-12  3.5754E-10  5.6417E-13  8.9537E-12  1.2337E-10  1.3092E-08
  1.5110E-14  5.6417E-13  2.5458E-13 -3.0137E-13  2.2762E-13  2.1138E-11
  7.9369E-14  8.9537E-12 -3.0137E-13  1.3525E-12  3.0948E-12  3.2885E-10
  1.8035E-12  1.2337E-10  2.2762E-13  3.0948E-12  4.4933E-11  4.5604E-09
  1.2692E-10  1.3092E-08  2.1138E-11  3.2885E-10  4.5604E-09  4.8131E-07
#      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:          345.18814 +/-     9.212
Argument of Peri:       83.25709 +/-    12.329
Long of Asc Node:       98.27566 +/-     0.047
Inclination:             3.48712 +/-     0.001
Eccentricity:         0.13257342 +/-    0.0096
Semi-Major Axis:     46.93672413 +/-    0.1182
Time of Perihelion: 2461923.0310 +/-    3005.4
Perihelion:          40.71416221 +/-    0.4622
Aphelion:            53.15928605 +/-    0.4701
Period (y)              321.5714 +/-      1.22
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.94399929 +/-    0.0102
Ecliptic Y           12.57913315 +/-    0.0034
Ecliptic Z            2.23808985 +/-    0.0006
Ecliptic XDOT        -0.00076577 +/-    0.0001
Ecliptic YDOT        -0.00274658 +/-    0.0000
Ecliptic ZDOT         0.00007027 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.98632355 +/-    0.0097
Geocenter to KBO     40.02333374 +/-    0.0107
# Hcoef:  7.05

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      

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    -0.02       0.00    -0.06
  2   0.0003     -6.96    -0.07      -0.03     0.01
  3   0.0006    -15.25     0.08      -0.27    -0.08
  4   0.0924  -2043.86    -0.06     -68.72     0.08
  5   0.0925  -2045.12     0.09     -68.46     0.45
  6   0.1798  -2821.64     0.27    -190.60    -0.28
  7   0.1828  -2823.96    -0.28    -195.04    -0.15
  8   0.9771   5985.03    -0.21     150.28     0.14
  9   0.9801   5904.76     0.21     149.87    -0.11

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        46.523    46.917    46.474
ecceobj         0.124     0.163     0.121
incobj          3.486     3.483     3.487
qmin           40.076    38.579    40.148
qmax           53.610    55.936    53.378
amean          46.648    47.076    46.603
amin           46.258    46.655    46.195
amax           47.086    47.568    47.041
emean           0.124     0.162     0.122
emin            0.112     0.147     0.109
emax            0.139     0.177     0.136
imean           1.813     1.658     1.826
imin            1.389     1.094     1.408
imax            2.248     2.235     2.258
excite_mean     0.128     0.164     0.126
fracstop        1.000     1.000     1.000
cjmean          3.114     3.106     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       186.7     203.3     184.6
kozaiamp        180.0     180.0     180.0