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: 15FX490
# Created Sun Feb 23 02:10:20 2025
# Orbit generated from Bernstein formalism
# Fitting 11 observations of 11
# Arc: 7.01d
# First observation: 2015/03/18
# Last observation: 2015/03/25
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# Chi-squared of fit: 2.54 DOF: 18 RMS: 0.08
# Min/Max residuals: -0.15 0.15
# Exact a, adot, b, bdot, g, gdot:
1.525042E-05 1.971869E-02 1.069919E-06 2.020770E-03 2.150091E-02 0.000000E+00
# Covariance matrix:
2.6200E-11 3.5308E-08 -5.3493E-14 -6.8936E-12 5.6043E-09 0.0000E+00
3.5308E-08 4.8004E-05 -7.2698E-11 -9.3688E-09 7.6164E-06 0.0000E+00
-5.3493E-14 -7.2698E-11 2.1007E-13 -1.2741E-11 -1.1535E-11 0.0000E+00
-6.8936E-12 -9.3688E-09 -1.2741E-11 2.1309E-09 -1.4865E-09 0.0000E+00
5.6043E-09 7.6164E-06 -1.1535E-11 -1.4865E-09 1.2085E-06 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.3080E-04
# lat0 lon0 xBary yBary zBary JD0
1.186456 -179.320223 0.057345 0.020636 -0.990283 2457099.992668
# Heliocentric elements and errors
Epoch: 2457090.5000 = 2015/03/09
Mean Anomaly: 0.25451 +/- 92.411
Argument of Peri: 10.97368 +/- 158.861
Long of Asc Node: 169.39858 +/- 3.838
Inclination: 5.95385 +/- 2.002
Eccentricity: 0.02735265 +/- 0.5566
Semi-Major Axis: 48.83896890 +/- 25.5039
Time of Perihelion: 2457002.3663 +/- 405999.4
Perihelion: 47.50309350 +/- 36.8014
Aphelion: 50.17484429 +/- 37.7559
Period (y) 341.3170 +/- 267.36
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -47.49064700 +/- 2.3773
Ecliptic Y -0.50636085 +/- 0.0280
Ecliptic Z 0.96310066 +/- 0.0492
Ecliptic XDOT 0.00003170 +/- 0.0015
Ecliptic YDOT -0.00251644 +/- 0.0008
Ecliptic ZDOT 0.00025735 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 47.50311060 +/- 2.3767
Geocenter to KBO 46.50966722 +/- 2.3780
# Hcoef: 8.63
The following table shows the complete astrometric record for 15FX490. 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 (15FX490) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.49189 12 04 22.95 +00 49 05.4 25.6r 15FX490 T09 C~8eRi 2015 03 18.49478 12 04 22.95 +00 49 05.4 25.0r 15FX490 T09 C~8eRi 2015 03 18.50772 12 04 22.90 +00 49 05.7 25.1r 15FX490 T09 C~8eRi 2015 03 18.52074 12 04 22.83 +00 49 06.0 24.8r 15FX490 T09 C~8eRi 2015 03 18.55140 12 04 22.72 +00 49 06.7 24.9r 15FX490 T09 C~8eRi 2015 03 20.44069 12 04 15.24 +00 49 58.1 24.7i 15FX490 T09 C~8eRi 2015 03 20.47725 12 04 15.08 +00 49 59.1 25.1i 15FX490 T09 C~8eRi 2015 03 20.49965 12 04 14.99 +00 49 59.8 24.9i 15FX490 T09 C~8eRi 2015 03 25.46918 12 03 55.26 +00 52 14.2 26.4g 15FX490 T09 C~8eRi 2015 03 25.48492 12 03 55.19 +00 52 14.6 26.2g 15FX490 T09 C~8eRi 2015 03 25.49781 12 03 55.15 +00 52 14.9 25.9g 15FX490 T09 C~8eRi
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 -0.15 0.00 0.09
2 0.0000 0.00 0.04 0.00 0.08
3 0.0000 -0.81 0.09 -0.02 0.05
4 0.0001 -1.89 -0.13 -0.17 -0.10
5 0.0002 -3.68 0.10 -0.18 -0.14
6 0.0053 -127.06 0.15 2.35 0.03
7 0.0054 -129.66 -0.02 2.31 -0.04
8 0.0055 -131.18 -0.05 2.42 0.05
9 0.0191 -456.14 -0.02 8.02 0.03
10 0.0191 -457.26 -0.10 7.97 -0.03
11 0.0192 -457.93 0.09 8.01 -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.
15FX490 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