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: 15FJ490
# Created Mon Apr 28 01:10:23 2025
# Orbit generated from Bernstein formalism
# Fitting 14 observations of 14
# Arc: 10.85d
# First observation: 2015/03/18
# Last observation: 2015/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000000 0.050098 0.000000 -0.006397 0.032933 0.000000
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after 14 iterations -- oscilliatory solution
# Chi-squared of fit: 5.46 DOF: 23 RMS: 0.11
# Min/Max residuals: -0.27 0.19
# Exact a, adot, b, bdot, g, gdot:
1.582024E-05 2.972232E-02 -3.269593E-06 -6.405252E-03 2.970756E-02 1.220685E-02
# Covariance matrix:
2.4865E-10 4.7178E-07 -1.0676E-12 2.2280E-10 7.4556E-08 -7.0336E-07
4.7178E-07 8.9642E-04 -2.0335E-09 4.2489E-07 1.4165E-04 -1.3447E-03
-1.0676E-12 -2.0335E-09 2.6731E-13 -1.2994E-11 -3.2123E-10 3.1984E-09
2.2280E-10 4.2489E-07 -1.2994E-11 1.1240E-09 6.7107E-08 -6.8357E-07
7.4556E-08 1.4165E-04 -3.2123E-10 6.7107E-08 2.2384E-05 -2.1231E-04
-7.0336E-07 -1.3447E-03 3.1984E-09 -6.8357E-07 -2.1231E-04 2.2606E-03
# lat0 lon0 xBary yBary zBary JD0
0.191219 178.897079 0.025086 0.003430 -0.991845 2457100.073858
# Heliocentric elements and errors
Epoch: 2457100.5000 = 2015/03/19
Mean Anomaly: 57.69430 +/- 51.587
Argument of Peri: 77.49779 +/- 161.994
Long of Asc Node: 359.71936 +/- 0.859
Inclination: 12.13037 +/- 11.837
Eccentricity: 0.37824938 +/- 1.4999
Semi-Major Axis: 37.36175656 +/- 15.2922
Time of Perihelion: 2443732.3969 +/- 8689.9
Perihelion: 23.22969547 +/- 56.8415
Aphelion: 51.49381765 +/- 59.8730
Period (y) 228.3753 +/- 140.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -34.64936689 +/- 5.3598
Ecliptic Y 0.69200104 +/- 0.1036
Ecliptic Z 0.11225639 +/- 0.0179
Ecliptic XDOT -0.00118288 +/- 0.0045
Ecliptic YDOT -0.00272278 +/- 0.0024
Ecliptic ZDOT -0.00058646 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 34.65645817 +/- 5.3587
Geocenter to KBO 33.66147088 +/- 5.3609
# Hcoef: 9.53
The following table shows the complete astrometric record for 15FJ490. 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 (15FJ490) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.57308 11 56 15.39 +00 36 50.9 24.8r 15FJ490 T09 C~8eRh 2015 03 18.57522 11 56 15.38 +00 36 50.9 25.3r 15FJ490 T09 C~8eRh 2015 03 20.43719 11 56 05.07 +00 37 50.7 24.3i 15FJ490 T09 C~8eRh 2015 03 20.46619 11 56 04.89 +00 37 51.9 24.7i 15FJ490 T09 C~8eRh 2015 03 20.50521 11 56 04.69 +00 37 53.1 24.4i 15FJ490 T09 C~8eRh 2015 03 20.54104 11 56 04.49 +00 37 54.1 24.6i 15FJ490 T09 C~8eRh 2015 03 20.55195 11 56 04.42 +00 37 54.4 24.5i 15FJ490 T09 C~8eRh 2015 03 25.46627 11 55 37.25 +00 40 31.6 25.4g 15FJ490 T09 C~8eRh 2015 03 25.48926 11 55 37.11 +00 40 32.6 25.6g 15FJ490 T09 C~8eRh 2015 03 25.52385 11 55 36.91 +00 40 33.7 25.1g 15FJ490 T09 C~8eRh 2015 03 25.55185 11 55 36.76 +00 40 34.3 25.5g 15FJ490 T09 C~8eRh 2015 03 29.41014 11 55 15.63 +00 42 36.6 23.9y 15FJ490 T09 C~8eRh 2015 03 29.41824 11 55 15.59 +00 42 36.9 24.3y 15FJ490 T09 C~8eRh 2015 03 29.42099 11 55 15.55 +00 42 36.9 24.8y 15FJ490 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 0.00 0.00 -0.03
2 0.0000 -0.14 0.05 -0.06 -0.08
3 0.0051 -165.81 0.06 -6.70 -0.06
4 0.0052 -168.76 -0.27 -6.67 0.09
5 0.0053 -171.99 0.03 -6.76 0.16
6 0.0054 -175.14 0.11 -7.04 0.04
7 0.0054 -176.22 0.01 -7.18 -0.06
8 0.0189 -612.65 0.19 -25.02 -0.08
9 0.0189 -614.98 -0.07 -24.94 0.10
10 0.0190 -618.17 -0.16 -25.12 0.06
11 0.0191 -620.47 0.05 -25.47 -0.17
12 0.0297 -959.90 0.07 -39.29 0.04
13 0.0297 -960.57 0.12 -39.26 0.11
14 0.0297 -961.12 -0.18 -39.50 -0.12
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.
15FJ490 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