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: 15FZ561 # Created Mon Jul 7 01:10:33 2025 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 65.89d # First observation: 2015/03/18 # Last observation: 2015/05/23 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.029555 0.000001 0.000656 0.025203 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 2.85 DOF: 19 RMS: 0.09 # Min/Max residuals: -0.21 0.20 # Exact a, adot, b, bdot, g, gdot: 1.482022E-05 2.196387E-02 6.213678E-07 7.749030E-04 2.400446E-02 9.368264E-03 # Covariance matrix: 9.4749E-13 9.5811E-10 7.6993E-14 -1.5025E-11 1.5208E-10 -1.0557E-08 9.5811E-10 1.4200E-06 1.1513E-10 -2.2475E-08 2.2060E-07 -1.6869E-05 7.6993E-14 1.1513E-10 2.0492E-13 -2.9751E-12 1.7862E-11 -1.3739E-09 -1.5025E-11 -2.2475E-08 -2.9751E-12 3.7438E-10 -3.4868E-09 2.6826E-07 1.5208E-10 2.2060E-07 1.7862E-11 -3.4868E-09 3.4360E-08 -2.5959E-06 -1.0557E-08 -1.6869E-05 -1.3739E-09 2.6826E-07 -2.5959E-06 2.0716E-04 # lat0 lon0 xBary yBary zBary JD0 -1.304533 178.511067 0.020387 -0.022453 -0.991686 2457099.960328 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 56.64063 +/- 54.360 Argument of Peri: 224.54152 +/- 10.119 Long of Asc Node: 210.89674 +/- 1.779 Inclination: 2.37592 +/- 0.117 Eccentricity: 0.39805782 +/- 0.5849 Semi-Major Axis: 46.13820486 +/- 22.0306 Time of Perihelion: 2439080.4454 +/- 11505.1 Perihelion: 27.77253176 +/- 30.0702 Aphelion: 64.50387796 +/- 40.9512 Period (y) 313.4002 +/- 224.47 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -42.62827709 +/- 0.3215 Ecliptic Y 1.12815136 +/- 0.0084 Ecliptic Z -0.94838438 +/- 0.0073 Ecliptic XDOT -0.00113839 +/- 0.0016 Ecliptic YDOT -0.00248222 +/- 0.0002 Ecliptic ZDOT 0.00006412 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.65374739 +/- 0.3213 Geocenter to KBO 41.65892011 +/- 0.3217 # Hcoef: 8.36
The following table shows the complete astrometric record for 15FZ561. 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 (15FZ561) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.45955 11 52 27.63 -00 36 17.1 24.6r 15FZ561 T09 C~8vFX 2015 03 18.48012 11 52 27.54 -00 36 16.5 24.7r 15FZ561 T09 C~8vFX 2015 03 18.54052 11 52 27.27 -00 36 14.8 24.7r 15FZ561 T09 C~8vFX 2015 03 18.57089 11 52 27.13 -00 36 13.9 24.2r 15FZ561 T09 C~8vFX 2015 03 20.40205 11 52 18.97 -00 35 19.8 24.1i 15FZ561 T09 C~8vFX 2015 03 20.42657 11 52 18.86 -00 35 19.2 24.1i 15FZ561 T09 C~8vFX 2015 03 25.51747 11 51 56.19 -00 32 49.0 25.5g 15FZ561 T09 C~8vFX 2015 03 25.54754 11 51 56.08 -00 32 48.3 26.0g 15FZ561 T09 C~8vFX 2015 05 23.28008 11 48 43.57 -00 10 24.2 24.1z 15FZ561 T09 C~8vFX 2015 05 23.29761 11 48 43.54 -00 10 24.2 24.3z 15FZ561 T09 C~8vFX 2015 05 23.31512 11 48 43.50 -00 10 23.9 24.1z 15FZ561 T09 C~8vFX 2015 05 23.35010 11 48 43.46 -00 10 23.5 24.4z 15FZ561 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 -0.07 0.00 -0.02 2 0.0001 -1.48 -0.02 0.01 -0.01 3 0.0002 -5.87 0.06 -0.04 -0.05 4 0.0003 -8.15 0.03 -0.05 -0.06 5 0.0053 -141.97 -0.03 0.92 0.11 6 0.0054 -143.72 0.04 0.81 0.00 7 0.0193 -515.44 -0.21 3.40 0.03 8 0.0194 -517.23 0.20 3.39 0.01 9 0.1802 -3701.59 0.04 88.12 0.13 10 0.1803 -3702.00 0.07 87.94 -0.08 11 0.1803 -3702.67 -0.15 87.98 -0.07 12 0.1804 -3703.38 0.04 88.11 0.00
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.
15FZ561 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