Orbit Fit and Astrometric record for 15FL562

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: 15FL562   
# Created Thu Jul  3 01:10:30 2025
# Orbit generated from Bernstein formalism
# Fitting     17 observations of     17
# Arc:  10.87d
# First observation: 2015/03/18
#  Last observation: 2015/03/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000002   0.033911  -0.000000   0.000653   0.025365   0.000000
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# Chi-squared of fit:    10.36 DOF:     29 RMS:  0.14
# Min/Max residuals:    -0.27    0.49
# Exact a, adot, b, bdot, g, gdot:
  1.261802E-05  2.228014E-02 -1.338690E-08  6.520306E-04  2.351417E-02 -5.308481E-03
# Covariance matrix:
  3.8796E-11  5.6034E-08 -3.8772E-14  3.0459E-12  8.9392E-09  6.2841E-08
  5.6034E-08  8.1344E-05 -5.6143E-11  4.3558E-09  1.2973E-05  8.7533E-05
 -3.8772E-14 -5.6143E-11  1.6264E-13 -7.4037E-12 -8.9596E-12 -7.0656E-11
  3.0459E-12  4.3558E-09 -7.4037E-12  7.1902E-10  6.9747E-10  9.7096E-09
  8.9392E-09  1.2973E-05 -8.9596E-12  6.9747E-10  2.0691E-06  1.4117E-05
  6.2841E-08  8.7533E-05 -7.0656E-11  9.7096E-09  1.4117E-05  3.7788E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.456776 -178.834738    0.066045    0.008020   -0.989920  2457099.974968
# Heliocentric elements and errors
Epoch:              2457090.5000  =  2015/03/09
Mean Anomaly:          295.53894 +/-    92.929
Argument of Peri:      106.33791 +/-   143.019
Long of Asc Node:      166.14153 +/-     5.741
Inclination:             1.73129 +/-     0.652
Eccentricity:         0.23658498 +/-    0.8469
Semi-Major Axis:     45.83557266 +/-   24.1363
Time of Perihelion: 2477385.8890 +/-   24476.0
Perihelion:          34.99156470 +/-   42.9709
Aphelion:            56.67958061 +/-   48.9674
Period (y)              310.3217 +/-    245.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -43.51159899 +/-    2.6009
Ecliptic Y           -0.81902612 +/-    0.0527
Ecliptic Z            0.33905146 +/-    0.0207
Ecliptic XDOT         0.00066788 +/-    0.0023
Ecliptic YDOT        -0.00258682 +/-    0.0009
Ecliptic ZDOT         0.00007108 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.52062737 +/-    2.6004
Geocenter to KBO     42.52754066 +/-    2.6015
# Hcoef:  8.21

The following table shows the complete astrometric record for 15FL562. 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 (15FL562) followed by the observatory code and reference code for the source of the astrometry.

2015 03  18.47419  12 05 00.19   -00 02 39.8   24.6r 15FL562   T09  C~8vFY      
2015 03  18.50772  12 04 59.99   -00 02 38.9   24.1r 15FL562   T09  C~8vFY      
2015 03  18.53399  12 04 59.89   -00 02 37.9   24.2r 15FL562   T09  C~8vFY      
2015 03  18.53616  12 04 59.87   -00 02 37.9   24.9r 15FL562   T09  C~8vFY      
2015 03  18.56444  12 04 59.75   -00 02 37.1   24.0r 15FL562   T09  C~8vFY      
2015 03  18.57737  12 04 59.71   -00 02 36.6   24.5r 15FL562   T09  C~8vFY      
2015 03  20.46072  12 04 51.55   -00 01 42.7   23.8i 15FL562   T09  C~8vFY      
2015 03  20.53554  12 04 51.22   -00 01 40.6   24.1i 15FL562   T09  C~8vFY      
2015 03  20.53830  12 04 51.21   -00 01 40.5   24.3i 15FL562   T09  C~8vFY      
2015 03  22.47399  12 04 42.80   -00 00 45.2   24.6i 15FL562   T09  C~8vFY      
2015 03  22.51021  12 04 42.65   -00 00 44.2   24.0i 15FL562   T09  C~8vFY      
2015 03  25.45174  12 04 29.87   +00 00 40.0   26.1g 15FL562   T09  C~8vFY      
2015 03  25.51323  12 04 29.60   +00 00 41.7   25.7g 15FL562   T09  C~8vFY      
2015 03  25.55400  12 04 29.42   +00 00 42.9   25.7g 15FL562   T09  C~8vFY      
2015 03  29.27727  12 04 13.36   +00 02 29.0   23.7y 15FL562   T09  C~8vFY      
2015 03  29.31534  12 04 13.20   +00 02 30.0   23.7y 15FL562   T09  C~8vFY      
2015 03  29.34265  12 04 13.07   +00 02 30.7   23.5y 15FL562   T09  C~8vFY      

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     0.49       0.00     0.09
     2   0.0001     -3.11    -0.21      -0.37    -0.27
     3   0.0002     -4.88    -0.09      -0.05     0.05
     4   0.0002     -5.16    -0.21      -0.17    -0.07
     5   0.0002     -7.13    -0.15      -0.15    -0.05
     6   0.0003     -7.88     0.03       0.07     0.17
     7   0.0054   -141.62     0.01       0.85     0.13
     8   0.0056   -147.00     0.04       0.81     0.09
     9   0.0057   -147.17     0.06       0.84     0.13
    10   0.0110   -284.91    -0.00       1.41    -0.07
    11   0.0111   -287.37     0.15       1.43    -0.05
    12   0.0191   -496.75    -0.09       2.45    -0.10
    13   0.0193   -501.14    -0.05       2.40    -0.14
    14   0.0194   -504.09    -0.07       2.42    -0.11
    15   0.0296   -767.32    -0.02       3.97     0.13
    16   0.0297   -769.92     0.09       3.93     0.10
    17   0.0298   -771.99    -0.02       3.80    -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.