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: 15FS490
# Created Sun Feb 23 02:10:20 2025
# Orbit generated from Bernstein formalism
# Fitting 12 observations of 12
# Arc: 7.04d
# 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: 3.14 DOF: 20 RMS: 0.09
# Min/Max residuals: -0.17 0.16
# Exact a, adot, b, bdot, g, gdot:
1.647891E-05 2.561959E-02 4.099136E-06 5.364629E-03 2.589091E-02 0.000000E+00
# Covariance matrix:
3.6128E-11 5.8543E-08 -2.3882E-14 3.7709E-12 9.2909E-09 0.0000E+00
5.8543E-08 9.5741E-05 -3.9040E-11 6.1646E-09 1.5189E-05 0.0000E+00
-2.3882E-14 -3.9040E-11 3.0718E-13 -1.7847E-11 -6.1939E-12 0.0000E+00
3.7709E-12 6.1646E-09 -1.7847E-11 1.7240E-09 9.7804E-10 0.0000E+00
9.2909E-09 1.5189E-05 -6.1939E-12 9.7804E-10 2.4098E-06 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.2838E-04
# lat0 lon0 xBary yBary zBary JD0
0.308972 -179.782949 0.049028 0.005469 -0.990933 2457100.010748
# Heliocentric elements and errors
Epoch: 2457100.5000 = 2015/03/19
Mean Anomaly: 0.01425 +/- 349.807
Argument of Peri: 1.46026 +/- 56.311
Long of Asc Node: 178.70415 +/- 0.551
Inclination: 11.80781 +/- 4.372
Eccentricity: 0.02992159 +/- 0.5687
Semi-Major Axis: 40.83967358 +/- 21.5566
Time of Perihelion: 2457096.7256 +/- 283285.8
Perihelion: 39.61768577 +/- 31.2538
Aphelion: 42.06166138 +/- 32.1313
Period (y) 260.9946 +/- 206.64
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -39.61700801 +/- 2.3157
Ecliptic Y -0.10124154 +/- 0.0086
Ecliptic Z 0.20845752 +/- 0.0125
Ecliptic XDOT 0.00000990 +/- 0.0016
Ecliptic YDOT -0.00271490 +/- 0.0009
Ecliptic ZDOT 0.00056737 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.61768580 +/- 2.3157
Geocenter to KBO 38.62359884 +/- 2.3158
# Hcoef: 8.45
The following table shows the complete astrometric record for 15FS490. 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 (15FS490) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.50997 12 01 17.29 +00 11 49.7 24.4r 15FS490 T09 C~8eRi 2015 03 18.53616 12 01 17.18 +00 11 50.7 24.1r 15FS490 T09 C~8eRi 2015 03 18.57737 12 01 16.99 +00 11 52.1 24.3r 15FS490 T09 C~8eRi 2015 03 20.42312 12 01 08.38 +00 12 54.2 23.5i 15FS490 T09 C~8eRi 2015 03 20.50240 12 01 08.00 +00 12 56.9 23.5i 15FS490 T09 C~8eRi 2015 03 20.53830 12 01 07.83 +00 12 58.3 23.4i 15FS490 T09 C~8eRi 2015 03 25.45464 12 00 44.86 +00 15 43.7 24.9g 15FS490 T09 C~8eRi 2015 03 25.48707 12 00 44.70 +00 15 44.9 25.5g 15FS490 T09 C~8eRi 2015 03 25.51323 12 00 44.59 +00 15 45.6 25.0g 15FS490 T09 C~8eRi 2015 03 25.52597 12 00 44.53 +00 15 46.2 24.9g 15FS490 T09 C~8eRi 2015 03 25.55185 12 00 44.40 +00 15 46.9 25.0g 15FS490 T09 C~8eRi 2015 03 25.55400 12 00 44.39 +00 15 46.9 25.1g 15FS490 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 -0.17 0.00 -0.17
2 0.0001 -1.91 -0.02 0.26 0.02
3 0.0002 -5.08 0.05 0.41 0.07
4 0.0052 -148.28 0.12 6.02 -0.03
5 0.0055 -154.58 0.08 6.23 -0.02
6 0.0056 -157.48 0.01 6.50 0.16
7 0.0190 -539.39 -0.04 21.20 -0.01
8 0.0191 -542.07 -0.17 21.34 0.06
9 0.0192 -543.86 0.10 21.33 -0.02
10 0.0192 -544.92 0.03 21.52 0.14
11 0.0193 -546.99 -0.01 21.39 -0.06
12 0.0193 -547.13 0.03 21.33 -0.13
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.
15FS490 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