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: 15FP561
# Created Mon Jul 7 01:10:32 2025
# Orbit generated from Bernstein formalism
# Fitting 17 observations of 17
# Arc: 10.89d
# First observation: 2015/03/18
# Last observation: 2015/03/29
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# Chi-squared of fit: 11.98 DOF: 30 RMS: 0.15
# Min/Max residuals: -0.53 0.24
# Exact a, adot, b, bdot, g, gdot:
2.057207E-06 3.027992E-03 1.639618E-05 2.431001E-02 2.443034E-02 0.000000E+00
# Covariance matrix:
2.2155E-10 3.4069E-07 1.7662E-13 -1.2262E-11 5.4136E-08 0.0000E+00
3.4069E-07 5.2442E-04 2.7185E-10 -1.8875E-08 8.3328E-05 0.0000E+00
1.7662E-13 2.7185E-10 2.0664E-13 -8.2687E-12 4.3196E-11 0.0000E+00
-1.2262E-11 -1.8875E-08 -8.2687E-12 5.6865E-10 -2.9991E-09 0.0000E+00
5.4136E-08 8.3328E-05 4.3196E-11 -2.9991E-09 1.3240E-05 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.9187E-04
# lat0 lon0 xBary yBary zBary JD0
0.071277 -177.885312 0.082541 0.001359 -0.988711 2457099.969108
# Heliocentric elements and errors
Epoch: 2457090.5000 = 2015/03/09
Mean Anomaly: 0.79266 +/- 79.282
Argument of Peri: 359.12417 +/- 145.089
Long of Asc Node: 181.99232 +/- 0.082
Inclination: 82.78340 +/- 53.137
Eccentricity: 0.06850415 +/- 0.2230
Semi-Major Axis: 45.00744326 +/- 17.3094
Time of Perihelion: 2456847.6648 +/- 134575.5
Perihelion: 41.92424647 +/- 18.9930
Aphelion: 48.09064005 +/- 21.0436
Period (y) 301.9498 +/- 174.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.89901057 +/- 6.0925
Ecliptic Y -1.46405959 +/- 0.2244
Ecliptic Z 0.05160779 +/- 0.0077
Ecliptic XDOT 0.00001249 +/- 0.0016
Ecliptic YDOT -0.00034475 +/- 0.0025
Ecliptic ZDOT 0.00272445 +/- 0.0004
# Distances at JD0 (AU)
Heliocenter to KBO 41.92461355 +/- 6.0888
Geocenter to KBO 40.93271359 +/- 6.0967
# Hcoef: 8.03
The following table shows the complete astrometric record for 15FP561. 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 (15FP561) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.46833 12 07 52.48 -00 46 32.2 24.4r 15FP561 T09 C~8vFW 2015 03 18.50341 12 07 52.31 -00 46 30.5 24.4r 15FP561 T09 C~8vFW 2015 03 18.53399 12 07 52.16 -00 46 29.0 24.4r 15FP561 T09 C~8vFW 2015 03 18.56444 12 07 52.00 -00 46 27.6 24.1r 15FP561 T09 C~8vFW 2015 03 20.41249 12 07 43.09 -00 45 01.8 24.0i 15FP561 T09 C~8vFW 2015 03 20.45524 12 07 42.87 -00 44 59.8 24.0i 15FP561 T09 C~8vFW 2015 03 20.49422 12 07 42.68 -00 44 58.1 24.2i 15FP561 T09 C~8vFW 2015 03 20.53554 12 07 42.47 -00 44 56.1 24.0i 15FP561 T09 C~8vFW 2015 03 25.48063 12 07 18.50 -00 41 06.2 25.1g 15FP561 T09 C~8vFW 2015 03 25.51107 12 07 18.34 -00 41 04.6 24.9g 15FP561 T09 C~8vFW 2015 03 25.54115 12 07 18.19 -00 41 03.4 24.9g 15FP561 T09 C~8vFW 2015 03 29.24886 12 07 00.25 -00 38 11.2 23.9y 15FP561 T09 C~8vFW 2015 03 29.25584 12 07 00.24 -00 38 11.0 23.3y 15FP561 T09 C~8vFW 2015 03 29.26907 12 07 00.18 -00 38 10.7 23.2y 15FP561 T09 C~8vFW 2015 03 29.30995 12 06 59.99 -00 38 09.0 23.3y 15FP561 T09 C~8vFW 2015 03 29.33172 12 06 59.88 -00 38 07.6 23.6y 15FP561 T09 C~8vFW 2015 03 29.35353 12 06 59.78 -00 38 06.8 23.6y 15FP561 T09 C~8vFW
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 -0.14
2 0.0001 -3.02 -0.02 0.55 -0.05
3 0.0002 -5.68 -0.04 1.03 0.02
4 0.0003 -8.43 -0.19 1.36 -0.05
5 0.0053 -165.17 0.16 26.96 0.10
6 0.0054 -168.99 0.02 27.48 0.06
7 0.0055 -172.28 0.10 27.91 -0.03
8 0.0057 -175.97 -0.02 28.49 0.00
9 0.0192 -597.26 0.19 96.51 0.12
10 0.0193 -600.09 -0.03 97.03 0.23
11 0.0194 -602.64 0.02 97.23 0.04
12 0.0295 -918.00 -0.53 148.26 0.08
13 0.0295 -918.22 -0.15 148.38 0.11
14 0.0296 -919.17 0.03 148.30 -0.15
15 0.0297 -922.46 0.24 148.73 -0.27
16 0.0297 -924.53 0.03 149.35 0.07
17 0.0298 -926.22 0.21 149.49 -0.08
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.
15FP561 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