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: 15FY489 # Created Sun Feb 23 02:10:20 2025 # Orbit generated from Bernstein formalism # Fitting 19 observations of 19 # Arc: 10.98d # First observation: 2015/03/18 # Last observation: 2015/03/29 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.027061 -0.000001 0.013993 0.027233 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 4.16 DOF: 33 RMS: 0.08 # Min/Max residuals: -0.14 0.19 # Exact a, adot, b, bdot, g, gdot: 1.352653E-05 2.311978E-02 8.695472E-06 1.451573E-02 2.641909E-02 -7.022638E-03 # Covariance matrix: 7.5743E-13 9.9193E-10 -2.3753E-13 -1.4226E-10 1.9655E-10 1.0238E-08 9.9193E-10 2.4636E-06 -5.3864E-10 -3.5449E-07 4.7593E-07 1.6006E-05 -2.3753E-13 -5.3864E-10 4.1376E-13 6.5185E-11 -1.0490E-10 -4.6539E-09 -1.4226E-10 -3.5449E-07 6.5185E-11 5.1741E-08 -6.8402E-08 -2.1642E-06 1.9655E-10 4.7593E-07 -1.0490E-10 -6.8402E-08 9.2084E-08 3.2602E-06 1.0238E-08 1.6006E-05 -4.6539E-09 -2.1642E-06 3.2602E-06 3.4158E-04 # lat0 lon0 xBary yBary zBary JD0 13.211514 -144.670437 0.608296 0.179254 -0.763054 2457100.141258 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 308.51697 +/- 34.921 Argument of Peri: 105.75359 +/- 29.379 Long of Asc Node: 194.92399 +/- 1.577 Inclination: 34.57881 +/- 2.077 Eccentricity: 0.28444989 +/- 0.6868 Semi-Major Axis: 43.58066903 +/- 16.6962 Time of Perihelion: 2472128.4876 +/- 5415.4 Perihelion: 31.18415266 +/- 32.2277 Aphelion: 55.97718540 +/- 36.8212 Period (y) 287.7061 +/- 165.34 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.05736090 +/- 0.3453 Ecliptic Y -21.26627603 +/- 0.2447 Ecliptic Z 8.65115731 +/- 0.0994 Ecliptic XDOT 0.00224062 +/- 0.0015 Ecliptic YDOT -0.00135195 +/- 0.0011 Ecliptic ZDOT 0.00129823 +/- 0.0004 # Distances at JD0 (AU) Heliocenter to KBO 38.62197153 +/- 0.3095 Geocenter to KBO 37.85141426 +/- 0.4348 # Hcoef: 7.67
The following table shows the complete astrometric record for 15FY489. 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 (15FY489) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.64048 14 29 37.98 -00 48 59.5 23.8r 15FY489 T09 C~8eRg 2015 03 18.64474 14 29 37.96 -00 48 59.3 23.6r 15FY489 T09 C~8eRg 2015 03 18.64687 14 29 37.95 -00 48 59.2 23.7r 15FY489 T09 C~8eRg 2015 03 22.54691 14 29 24.40 -00 46 22.4 23.4i 15FY489 T09 C~8eRg 2015 03 22.56516 14 29 24.33 -00 46 21.7 23.6i 15FY489 T09 C~8eRg 2015 03 22.58192 14 29 24.28 -00 46 21.0 23.3i 15FY489 T09 C~8eRg 2015 03 22.59857 14 29 24.21 -00 46 20.2 23.3i 15FY489 T09 C~8eRg 2015 03 25.60942 14 29 13.04 -00 44 19.1 24.4g 15FY489 T09 C~8eRg 2015 03 25.61869 14 29 13.00 -00 44 18.7 24.1g 15FY489 T09 C~8eRg 2015 03 25.62302 14 29 12.99 -00 44 18.6 24.4g 15FY489 T09 C~8eRg 2015 03 25.62519 14 29 12.97 -00 44 18.4 24.0g 15FY489 T09 C~8eRg 2015 03 29.46344 14 28 57.96 -00 41 44.0 22.8y 15FY489 T09 C~8eRg 2015 03 29.47724 14 28 57.90 -00 41 43.5 23.2y 15FY489 T09 C~8eRg 2015 03 29.47994 14 28 57.89 -00 41 43.1 23.0y 15FY489 T09 C~8eRg 2015 03 29.54534 14 28 57.61 -00 41 40.5 23.3z 15FY489 T09 C~8eRg 2015 03 29.59028 14 28 57.43 -00 41 38.8 23.0z 15FY489 T09 C~8eRg 2015 03 29.60394 14 28 57.37 -00 41 38.3 22.9z 15FY489 T09 C~8eRg 2015 03 29.61487 14 28 57.32 -00 41 37.9 23.3z 15FY489 T09 C~8eRg 2015 03 29.61767 14 28 57.33 -00 41 37.8 23.2z 15FY489 T09 C~8eRg
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 0.06 0.00 -0.00
2 0.0000 -0.35 -0.02 0.09 -0.00
3 0.0000 -0.52 -0.07 0.14 0.00
4 0.0107 -243.64 -0.02 82.49 0.02
5 0.0107 -244.86 -0.04 82.81 -0.03
6 0.0108 -245.80 0.12 83.23 0.05
7 0.0108 -247.05 -0.04 83.64 0.14
8 0.0191 -444.82 0.04 143.81 -0.08
9 0.0191 -445.52 -0.02 143.99 -0.07
10 0.0191 -445.70 0.10 144.04 -0.11
11 0.0191 -446.04 -0.10 144.13 -0.06
12 0.0296 -709.11 0.11 217.10 -0.02
13 0.0297 -710.12 0.08 217.28 -0.09
14 0.0297 -710.39 -0.00 217.61 0.19
15 0.0299 -715.21 -0.14 218.70 0.12
16 0.0300 -718.31 -0.03 219.44 0.04
17 0.0300 -719.33 -0.07 219.62 -0.02
18 0.0300 -720.17 -0.13 219.75 -0.08
19 0.0301 -720.06 0.18 219.90 0.01
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.
15FY489 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