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: 15FK490
# Created Sun Feb 23 02:10:20 2025
# Orbit generated from Bernstein formalism
# Fitting 12 observations of 12
# Arc: 10.87d
# 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: 3.98 DOF: 20 RMS: 0.10
# Min/Max residuals: -0.24 0.19
# Exact a, adot, b, bdot, g, gdot:
1.573083E-05 2.681502E-02 8.442457E-08 9.212512E-04 2.630793E-02 0.000000E+00
# Covariance matrix:
3.4804E-11 5.6833E-08 -1.9839E-13 2.3916E-11 9.0376E-09 0.0000E+00
5.6833E-08 9.3445E-05 -3.2614E-10 3.9316E-08 1.4857E-05 0.0000E+00
-1.9839E-13 -3.2614E-10 2.2866E-13 -9.1954E-12 -5.1855E-11 0.0000E+00
2.3916E-11 3.9316E-08 -9.1954E-12 7.9721E-10 6.2511E-09 0.0000E+00
9.0376E-09 1.4857E-05 -5.1855E-11 6.2511E-09 2.3622E-06 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.3960E-04
# lat0 lon0 xBary yBary zBary JD0
0.929499 -179.369261 0.056497 0.016195 -0.990415 2457099.992668
# Heliocentric elements and errors
Epoch: 2457090.5000 = 2015/03/09
Mean Anomaly: 359.59177 +/- 279.372
Argument of Peri: 25.14478 +/- 345.974
Long of Asc Node: 155.81506 +/- 7.734
Inclination: 2.16425 +/- 0.636
Eccentricity: 0.03193725 +/- 0.5625
Semi-Major Axis: 40.29171656 +/- 21.1200
Time of Perihelion: 2457196.4303 +/- 259326.3
Perihelion: 39.00490980 +/- 30.5247
Aphelion: 41.57852332 +/- 31.4443
Period (y) 255.7595 +/- 201.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -38.99828064 +/- 2.2203
Ecliptic Y -0.37295719 +/- 0.0243
Ecliptic Z 0.61664512 +/- 0.0360
Ecliptic XDOT 0.00002886 +/- 0.0016
Ecliptic YDOT -0.00279621 +/- 0.0008
Ecliptic ZDOT 0.00009595 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.00493868 +/- 2.2199
Geocenter to KBO 38.01135869 +/- 2.2207
# Hcoef: 8.38
The following table shows the complete astrometric record for 15FK490. 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 (15FK490) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.49189 12 03 47.62 +00 36 06.9 24.3r 15FK490 T09 C~8eRh 2015 03 18.55140 12 03 47.32 +00 36 08.6 23.9r 15FK490 T09 C~8eRh 2015 03 18.57737 12 03 47.19 +00 36 09.6 24.4r 15FK490 T09 C~8eRh 2015 03 20.44069 12 03 38.30 +00 37 08.7 24.0i 15FK490 T09 C~8eRh 2015 03 20.46343 12 03 38.18 +00 37 09.6 23.9i 15FK490 T09 C~8eRh 2015 03 20.47725 12 03 38.12 +00 37 09.9 24.1i 15FK490 T09 C~8eRh 2015 03 20.53830 12 03 37.80 +00 37 11.9 24.4i 15FK490 T09 C~8eRh 2015 03 20.55748 12 03 37.73 +00 37 12.4 24.5i 15FK490 T09 C~8eRh 2015 03 29.27997 12 02 56.07 +00 41 47.6 23.1y 15FK490 T09 C~8eRh 2015 03 29.32352 12 02 55.87 +00 41 49.3 23.5y 15FK490 T09 C~8eRh 2015 03 29.33991 12 02 55.78 +00 41 49.6 24.0y 15FK490 T09 C~8eRh 2015 03 29.35897 12 02 55.69 +00 41 50.3 23.8y 15FK490 T09 C~8eRh
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 0.08 0.00 0.10
2 0.0002 -4.80 0.01 -0.23 -0.14
3 0.0002 -6.99 -0.12 -0.09 -0.01
4 0.0053 -152.84 0.13 1.10 -0.00
5 0.0054 -154.85 -0.07 1.21 0.11
6 0.0054 -155.79 0.09 1.12 0.02
7 0.0056 -160.99 -0.24 1.05 -0.05
8 0.0057 -162.16 0.12 1.09 -0.02
9 0.0295 -844.92 0.04 5.04 -0.18
10 0.0297 -848.35 0.03 5.41 0.19
11 0.0297 -849.71 -0.03 5.15 -0.07
12 0.0298 -851.23 -0.05 5.25 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.
15FK490 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