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: 15FA564
# Created Thu Sep 4 01:10:35 2025
# Orbit generated from Bernstein formalism
# Fitting 7 observations of 7
# Arc: 7.04d
# First observation: 2015/03/18
# Last observation: 2015/03/25
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# Chi-squared of fit: 3.21 DOF: 10 RMS: 0.12
# Min/Max residuals: -0.20 0.25
# Exact a, adot, b, bdot, g, gdot:
1.482044E-05 2.591488E-02 9.938824E-07 9.926560E-04 2.555481E-02 0.000000E+00
# Covariance matrix:
3.2472E-11 5.1518E-08 -1.0408E-13 1.6771E-11 8.1789E-09 0.0000E+00
5.1518E-08 8.2852E-05 -1.6729E-10 2.6956E-08 1.3146E-05 0.0000E+00
-1.0408E-13 -1.6729E-10 4.0361E-13 -2.6811E-11 -2.6546E-11 0.0000E+00
1.6771E-11 2.6956E-08 -2.6811E-11 3.7102E-09 4.2774E-09 0.0000E+00
8.1789E-09 1.3146E-05 -2.6546E-11 4.2774E-09 2.0860E-06 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.1960E-04
# lat0 lon0 xBary yBary zBary JD0
0.959793 179.346233 0.034329 0.016736 -0.991421 2457099.989758
# Heliocentric elements and errors
Epoch: 2457090.5000 = 2015/03/09
Mean Anomaly: 0.32418 +/- 244.552
Argument of Peri: 22.74805 +/- 310.895
Long of Asc Node: 156.16994 +/- 7.277
Inclination: 2.38207 +/- 0.711
Eccentricity: 0.05120698 +/- 0.5593
Semi-Major Axis: 42.29173150 +/- 22.6008
Time of Perihelion: 2457000.0384 +/- 168699.1
Perihelion: 40.12609949 +/- 31.9281
Aphelion: 44.45736352 +/- 33.5265
Period (y) 275.0372 +/- 220.47
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -40.11777542 +/- 2.2112
Ecliptic Y 0.49192922 +/- 0.0254
Ecliptic Z 0.65554048 +/- 0.0370
Ecliptic XDOT -0.00003332 +/- 0.0016
Ecliptic YDOT -0.00278204 +/- 0.0008
Ecliptic ZDOT 0.00010642 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.12614650 +/- 2.2107
Geocenter to KBO 39.13157644 +/- 2.2116
# Hcoef: 10.09
The following table shows the complete astrometric record for 15FA564. 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 (15FA564) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.48898 11 59 07.68 +01 08 26.3 26.3r 15FA564 T09 C~90HY 2015 03 18.54922 11 59 07.38 +01 08 28.3 25.7r 15FA564 T09 C~90HY 2015 03 20.43719 11 58 58.60 +01 09 26.8 25.6i 15FA564 T09 C~90HY 2015 03 20.47450 11 58 58.41 +01 09 28.1 26.1i 15FA564 T09 C~90HY 2015 03 20.51627 11 58 58.21 +01 09 29.3 25.5i 15FA564 T09 C~90HY 2015 03 25.49565 11 58 35.06 +01 12 02.6 26.8g 15FA564 T09 C~90HY 2015 03 25.52597 11 58 34.90 +01 12 03.6 26.1g 15FA564 T09 C~90HY
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 0.25 0.00 -0.08
2 0.0002 -4.92 -0.01 0.05 -0.04
3 0.0053 -149.00 0.04 1.33 0.05
4 0.0054 -152.13 -0.20 1.39 0.11
5 0.0056 -155.36 -0.19 1.30 0.01
6 0.0192 -534.87 0.18 3.84 -0.01
7 0.0193 -537.47 -0.08 3.80 -0.04
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.
15FA564 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