Orbit Fit and Astrometric record for 15FQ561

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: 15FQ561   
# Created Mon Jul  7 01:10:32 2025
# Orbit generated from Bernstein formalism
# Fitting     15 observations of     15
# Arc:  10.88d
# First observation: 2015/03/18
#  Last observation: 2015/03/29
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# Chi-squared of fit:     9.02 DOF:     26 RMS:  0.14
# Min/Max residuals:    -0.26    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.524558E-05  2.359004E-02 -9.688031E-07 -1.131959E-03  2.415669E-02  0.000000E+00
# Covariance matrix:
  3.0694E-11  4.6178E-08  4.5950E-14 -4.9819E-12  7.3435E-09  0.0000E+00
  4.6178E-08  6.9916E-05  6.9560E-11 -7.5417E-09  1.1117E-05  0.0000E+00
  4.5950E-14  6.9560E-11  1.8521E-13 -6.8667E-12  1.1060E-11  0.0000E+00
 -4.9819E-12 -7.5417E-09 -6.8667E-12  5.4036E-10 -1.1992E-09  0.0000E+00
  7.3435E-09  1.1117E-05  1.1060E-11 -1.1992E-09  1.7676E-06  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  1.8550E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.141263 -179.604735    0.052683   -0.002315   -0.990751  2457099.977938
# Heliocentric elements and errors
Epoch:              2457090.5000  =  2015/03/09
Mean Anomaly:            0.05564 +/-   317.826
Argument of Peri:      182.79106 +/-    24.262
Long of Asc Node:      357.44297 +/-     1.017
Inclination:             2.74290 +/-     0.966
Eccentricity:         0.03077681 +/-    0.5589
Semi-Major Axis:     43.73637774 +/-   22.8689
Time of Perihelion: 2457074.1719 +/-  304568.2
Perihelion:          42.39031142 +/-   32.9966
Aphelion:            45.08244406 +/-   33.9582
Period (y)              289.2494 +/-    226.86
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -42.38951119 +/-    2.2783
Ecliptic Y           -0.23992650 +/-    0.0155
Ecliptic Z           -0.10208707 +/-    0.0056
Ecliptic XDOT         0.00001534 +/-    0.0015
Ecliptic YDOT        -0.00267933 +/-    0.0008
Ecliptic ZDOT        -0.00012820 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.39031311 +/-    2.2782
Geocenter to KBO     41.39640822 +/-    2.2783
# Hcoef:  8.38

The following table shows the complete astrometric record for 15FQ561. 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 (15FQ561) followed by the observatory code and reference code for the source of the astrometry.

2015 03  18.47716  12 01 13.55   -00 17 12.6   25.0r 15FQ561   T09  C~8vFW      
2015 03  18.50126  12 01 13.44   -00 17 11.9   25.1r 15FQ561   T09  C~8vFW      
2015 03  18.50997  12 01 13.39   -00 17 11.9   24.6r 15FQ561   T09  C~8vFW      
2015 03  18.53616  12 01 13.28   -00 17 10.7   25.1r 15FQ561   T09  C~8vFW      
2015 03  18.56659  12 01 13.15   -00 17 10.2   24.8r 15FQ561   T09  C~8vFW      
2015 03  20.42312  12 01 04.86   -00 16 17.5   24.3i 15FQ561   T09  C~8vFW      
2015 03  20.46343  12 01 04.69   -00 16 16.5   24.2i 15FQ561   T09  C~8vFW      
2015 03  20.49142  12 01 04.55   -00 16 15.8   24.4i 15FQ561   T09  C~8vFW      
2015 03  20.53830  12 01 04.34   -00 16 14.1   24.2i 15FQ561   T09  C~8vFX      
2015 03  29.25932  12 00 25.55   -00 12 08.0   23.7y 15FQ561   T09  C~8vFX      
2015 03  29.28823  12 00 25.44   -00 12 07.3   24.3y 15FQ561   T09  C~8vFX      
2015 03  29.31534  12 00 25.32   -00 12 06.5   23.9y 15FQ561   T09  C~8vFX      
2015 03  29.33718  12 00 25.21   -00 12 05.5   24.0y 15FQ561   T09  C~8vFX      
2015 03  29.33991  12 00 25.20   -00 12 05.5   24.3y 15FQ561   T09  C~8vFX      
2015 03  29.35626  12 00 25.12   -00 12 05.5   23.7y 15FQ561   T09  C~8vFX      

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     0.04       0.00     0.05
     2   0.0001     -1.79     0.02      -0.01     0.06
     3   0.0001     -2.48    -0.02      -0.31    -0.23
     4   0.0002     -4.47    -0.08       0.13     0.25
     5   0.0002     -6.46     0.16      -0.18    -0.04
     6   0.0053   -141.51    -0.12      -1.30     0.00
     7   0.0054   -144.25     0.12      -1.39    -0.05
     8   0.0055   -146.45    -0.02      -1.59    -0.21
     9   0.0056   -150.02    -0.13      -1.28     0.15
    10   0.0295   -781.75    -0.13      -6.93    -0.08
    11   0.0296   -783.54     0.18      -6.95    -0.07
    12   0.0297   -785.51     0.18      -6.93    -0.03
    13   0.0297   -787.42    -0.14      -6.67     0.26
    14   0.0297   -787.56    -0.08      -6.73     0.20
    15   0.0298   -788.66     0.01      -7.21    -0.26

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.

15FQ561    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0