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: 15FN490 # Created Sun Feb 23 02:10:20 2025 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 7.07d # First observation: 2015/03/18 # Last observation: 2015/03/25 # WARNING Fitting with energy constraint # WARNING and with gdot fixed = 0 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # Chi-squared of fit: 7.62 DOF: 20 RMS: 0.14 # Min/Max residuals: -0.26 0.28 # Exact a, adot, b, bdot, g, gdot: 1.435814E-05 2.342975E-02 -8.089838E-06 -1.454835E-02 2.694437E-02 0.000000E+00 # Covariance matrix: 6.0201E-11 1.0116E-07 1.5031E-13 -1.9606E-11 1.6058E-08 0.0000E+00 1.0116E-07 1.7076E-04 2.5367E-10 -3.3087E-08 2.7100E-05 0.0000E+00 1.5031E-13 2.5367E-10 2.4641E-13 -1.6562E-11 4.0259E-11 0.0000E+00 -1.9606E-11 -3.3087E-08 -1.6562E-11 2.2123E-09 -5.2511E-09 0.0000E+00 1.6058E-08 2.7100E-05 4.0259E-11 -5.2511E-09 4.3010E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.5741E-04 # lat0 lon0 xBary yBary zBary JD0 -0.603440 178.451618 0.018998 -0.010320 -0.991919 2457099.980898 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 2.23262 +/- 36.391 Argument of Peri: 178.77630 +/- 103.212 Long of Asc Node: 357.47390 +/- 0.528 Inclination: 31.77753 +/- 14.267 Eccentricity: 0.01492022 +/- 0.5843 Semi-Major Axis: 38.68528586 +/- 20.0449 Time of Perihelion: 2456545.4581 +/- 536196.6 Perihelion: 38.10809302 +/- 30.0139 Aphelion: 39.26247869 +/- 30.4107 Period (y) 240.6173 +/- 187.02 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -38.09212573 +/- 2.8554 Ecliptic Y 1.04848843 +/- 0.0774 Ecliptic Z -0.39115649 +/- 0.0301 Ecliptic XDOT -0.00005218 +/- 0.0016 Ecliptic YDOT -0.00238605 +/- 0.0011 Ecliptic ZDOT -0.00147811 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 38.10856038 +/- 2.8542 Geocenter to KBO 37.11350224 +/- 2.8566 # Hcoef: 10.28
The following table shows the complete astrometric record for 15FN490. 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 (15FN490) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.48012 11 53 21.45 +00 03 43.8 25.4r 15FN490 T09 C~8eRh 2015 03 18.51214 11 53 21.29 +00 03 44.8 25.5r 15FN490 T09 C~8eRh 2015 03 18.54052 11 53 21.13 +00 03 45.4 25.3r 15FN490 T09 C~8eRh 2015 03 18.57308 11 53 20.95 +00 03 46.1 25.9r 15FN490 T09 C~8eRh 2015 03 20.42657 11 53 11.19 +00 04 33.1 26.0i 15FN490 T09 C~8eRh 2015 03 20.50521 11 53 10.78 +00 04 35.2 26.2i 15FN490 T09 C~8eRh 2015 03 20.54374 11 53 10.57 +00 04 36.2 25.9i 15FN490 T09 C~8eRh 2015 03 22.48509 11 53 00.30 +00 05 25.5 26.4i 15FN490 T09 C~8eRh 2015 03 22.52113 11 53 00.11 +00 05 26.2 25.9i 15FN490 T09 C~8eRh 2015 03 25.49141 11 52 44.48 +00 06 41.3 26.4g 15FN490 T09 C~8eRh 2015 03 25.51747 11 52 44.36 +00 06 42.2 26.4g 15FN490 T09 C~8eRh 2015 03 25.54970 11 52 44.18 +00 06 43.2 26.3g 15FN490 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 -0.13 0.00 -0.09
2 0.0001 -2.60 -0.04 -0.04 0.15
3 0.0002 -5.04 -0.10 -0.44 -0.00
4 0.0003 -7.80 -0.13 -0.87 -0.15
5 0.0053 -160.81 0.15 -15.96 -0.04
6 0.0055 -167.29 0.28 -16.48 0.13
7 0.0056 -170.58 0.23 -16.81 0.13
8 0.0110 -331.53 -0.16 -32.83 0.01
9 0.0111 -334.42 -0.04 -33.33 -0.16
10 0.0192 -579.41 -0.07 -57.64 -0.26
11 0.0193 -581.41 0.10 -57.53 0.08
12 0.0194 -584.29 -0.10 -57.69 0.20
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.
15FN490 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