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 Fri Mar 29 01:17:46 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     17 observations of     17
# Arc:   7.06y
# First observation: 2015/03/17
#  Last observation: 2022/04/08
# Chi-squared of fit:    24.48 DOF:     28 RMS:  0.21
# Min/Max residuals:    -0.54    0.43
# Exact a, adot, b, bdot, g, gdot:
  1.653963E-05  2.593720E-02  4.283028E-07  7.082947E-04  2.498668E-02 -1.044994E-03
# Covariance matrix:
  2.7209E-13 -1.5340E-13  3.0880E-15 -3.2634E-15  1.3013E-13 -6.4791E-13
 -1.5340E-13  2.7605E-13 -3.3902E-15  7.1046E-15 -2.8802E-15  1.4778E-12
  3.0880E-15 -3.3902E-15  1.8981E-13 -3.2666E-14  7.3010E-15 -1.7469E-14
 -3.2634E-15  7.1046E-15 -3.2666E-14  1.0944E-14 -2.0823E-16  3.9548E-14
  1.3013E-13 -2.8802E-15  7.3010E-15 -2.0823E-16  6.0605E-13  1.0198E-13
 -6.4791E-13  1.4778E-12 -1.7469E-14  3.9548E-14  1.0198E-13  8.2544E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.205590  161.752043   -0.246781    0.053862   -0.959099  2457098.786648
# Heliocentric elements and errors
Epoch:              2457098.5000  =  2015/03/17
Mean Anomaly:          347.12938 +/-     0.044
Argument of Peri:       80.68186 +/-     0.058
Long of Asc Node:       98.29032 +/-     0.003
Inclination:             3.48754 +/-     0.000
Eccentricity:         0.13076376 +/-    0.0001
Semi-Major Axis:     46.91622445 +/-    0.0073
Time of Perihelion: 2461294.9307 +/-      30.2
Perihelion:          40.78128256 +/-    0.0080
Aphelion:            53.05116634 +/-    0.0096
Period (y)              321.3607 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.94208695 +/-    0.0012
Ecliptic Y           12.57850187 +/-    0.0004
Ecliptic Z            2.23796401 +/-    0.0001
Ecliptic XDOT        -0.00078065 +/-    0.0000
Ecliptic YDOT        -0.00274200 +/-    0.0000
Ecliptic ZDOT         0.00007117 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.98432797 +/-    0.0011
Geocenter to KBO     40.02137676 +/-    0.0012
# Hcoef:  6.98

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      
2021 02  15.354790 11 33 32.193  +06 33 46.22  23.1G 15FS345   G37  C~4ZH8      
2021 02  15.438680 11 33 31.847  +06 33 48.83        15FS345   G37  C~4ZH8      
2021 02  15.505630 11 33 31.578  +06 33 50.62        15FS345   G37  C~4ZH8      
2022 04  08.154950 11 35 18.226  +06 24 23.05  23.0G 15FS345   G37  C~5ZbD      
2022 04  08.189930 11 35 18.085  +06 24 23.89        15FS345   G37  C~5ZbD      
2022 04  08.224870 11 35 17.948  +06 24 24.43        15FS345   G37  C~5ZbD      

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     0.01
     2   0.0003      0.00    -0.04       0.00     0.10
     3   0.0006      0.00     0.07       0.00    -0.04
     4   0.0924      0.00     0.02       0.00     0.15
     5   0.0925      0.00     0.30       0.00     0.43
     6   0.1798      0.00     0.14       0.00    -0.29
     7   0.1828      0.00    -0.33       0.00     0.03
     8   0.9771      0.00    -0.16       0.00     0.24
     9   0.9801      0.00     0.12       0.00    -0.16
    10   3.0661      0.00    -0.54       0.00    -0.28
    11   3.0662      0.00     0.25       0.00    -0.49
    12   5.9194      0.00    -0.01       0.00    -0.10
    13   5.9197      0.00    -0.02       0.00     0.10
    14   5.9198      0.00     0.07       0.00    -0.03
    15   7.0606      0.00    -0.04       0.00     0.21
    16   7.0607      0.00     0.03       0.00     0.21
    17   7.0608      0.00     0.16       0.00    -0.10

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        46.503    46.503    46.503
ecceobj         0.122     0.122     0.122
incobj          3.487     3.487     3.487
qmin           40.104    40.134    40.126
qmax           53.452    53.459    53.464
amean          46.625    46.625    46.626
amin           46.233    46.236    46.235
amax           47.054    47.060    47.058
emean           0.123     0.123     0.123
emin            0.110     0.111     0.110
emax            0.136     0.136     0.137
imean           1.818     1.819     1.818
imin            1.398     1.399     1.397
imax            2.251     2.251     2.250
excite_mean     0.127     0.127     0.127
fracstop        1.000     1.000     1.000
cjmean          3.114     3.114     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       185.8     186.1     185.8
kozaiamp        180.0     180.0     180.0