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: 15FZ494 # Created Mon Apr 28 01:10:23 2025 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 10.94d # First observation: 2015/03/18 # Last observation: 2015/03/29 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.037098 0.000001 0.017512 0.029975 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: 5.09 DOF: 31 RMS: 0.09 # Min/Max residuals: -0.22 0.24 # Exact a, adot, b, bdot, g, gdot: 1.171825E-05 2.075387E-02 1.078102E-05 1.753145E-02 2.738824E-02 1.003454E-02 # Covariance matrix: 2.2783E-10 3.9428E-07 1.9890E-12 -4.8413E-10 6.2386E-08 -4.5652E-07 3.9428E-07 6.8297E-04 3.4494E-09 -8.4084E-07 1.0806E-04 -7.9503E-04 1.9890E-12 3.4494E-09 1.9821E-13 -1.1505E-11 5.4561E-10 -4.2249E-09 -4.8413E-10 -8.4084E-07 -1.1505E-11 1.6106E-09 -1.3296E-07 1.0912E-06 6.2386E-08 1.0806E-04 5.4561E-10 -1.3296E-07 1.7097E-05 -1.2563E-04 -4.5652E-07 -7.9503E-04 -4.2249E-09 1.0912E-06 -1.2563E-04 1.1397E-03 # lat0 lon0 xBary yBary zBary JD0 -0.871933 179.511481 0.037652 -0.014958 -0.991323 2457099.963238 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 59.29091 +/- 51.166 Argument of Peri: 258.58966 +/- 125.792 Long of Asc Node: 180.46142 +/- 1.253 Inclination: 40.09846 +/- 35.425 Eccentricity: 0.35206803 +/- 1.2101 Semi-Major Axis: 40.17164048 +/- 16.0195 Time of Perihelion: 2441773.8640 +/- 9527.3 Perihelion: 26.02849022 +/- 49.7089 Aphelion: 54.31479074 +/- 53.2200 Period (y) 254.6171 +/- 152.30 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -37.50067319 +/- 5.5115 Ecliptic Y 0.35738220 +/- 0.0475 Ecliptic Z -0.55521384 +/- 0.0838 Ecliptic XDOT -0.00105072 +/- 0.0035 Ecliptic YDOT -0.00207157 +/- 0.0023 Ecliptic ZDOT 0.00173714 +/- 0.0002 # Distances at JD0 (AU) Heliocenter to KBO 37.50648576 +/- 5.5106 Geocenter to KBO 36.51201546 +/- 5.5123 # Hcoef: 8.05
The following table shows the complete astrometric record for 15FZ494. 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 (15FZ494) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.46246 11 56 49.19 -00 36 20.4 23.3r 15FZ494 T09 C~8iai 2015 03 18.48012 11 56 49.10 -00 36 19.5 23.3r 15FZ494 T09 C~8iai 2015 03 18.49910 11 56 49.01 -00 36 18.7 23.5r 15FZ494 T09 C~8iai 2015 03 18.53831 11 56 48.81 -00 36 17.0 23.5r 15FZ494 T09 C~8iai 2015 03 18.56877 11 56 48.64 -00 36 15.5 23.7r 15FZ494 T09 C~8iai 2015 03 20.40558 11 56 39.50 -00 34 56.4 23.1i 15FZ494 T09 C~8iai 2015 03 20.42657 11 56 39.39 -00 34 55.5 23.0i 15FZ494 T09 C~8iai 2015 03 20.46619 11 56 39.19 -00 34 53.7 23.2i 15FZ494 T09 C~8iai 2015 03 20.54104 11 56 38.82 -00 34 50.5 23.5i 15FZ494 T09 C~8iai 2015 03 25.45755 11 56 14.34 -00 31 17.9 24.8g 15FZ494 T09 C~8iai 2015 03 25.51534 11 56 14.04 -00 31 15.6 24.7g 15FZ494 T09 C~8iai 2015 03 25.54542 11 56 13.89 -00 31 14.4 25.5g 15FZ494 T09 C~8iai 2015 03 29.31803 11 55 55.28 -00 28 32.0 23.2y 15FZ494 T09 C~8iai 2015 03 29.33718 11 55 55.20 -00 28 31.0 23.6y 15FZ494 T09 C~8iai 2015 03 29.38505 11 55 54.95 -00 28 28.9 23.5y 15FZ494 T09 C~8iai 2015 03 29.39585 11 55 54.90 -00 28 28.6 23.2y 15FZ494 T09 C~8iai 2015 03 29.40401 11 55 54.86 -00 28 28.3 23.3y 15FZ494 T09 C~8iai 2015 03 29.40670 11 55 54.86 -00 28 28.3 23.2y 15FZ494 T09 C~8iai
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 0.05 0.00 -0.14
2 0.0000 -1.60 -0.00 0.29 -0.01
3 0.0001 -3.15 0.09 0.49 0.01
4 0.0002 -6.58 0.07 0.85 0.01
5 0.0003 -9.52 -0.22 1.21 0.09
6 0.0053 -166.76 0.01 19.25 -0.03
7 0.0054 -168.63 -0.04 19.42 -0.06
8 0.0055 -172.10 -0.05 19.88 0.03
9 0.0057 -178.47 0.10 20.61 0.06
10 0.0192 -599.92 -0.00 69.60 0.21
11 0.0193 -604.96 -0.04 69.92 -0.02
12 0.0194 -607.51 0.02 70.12 -0.10
13 0.0297 -928.22 -0.11 108.08 -0.13
14 0.0298 -929.72 0.03 108.52 0.13
15 0.0299 -933.99 -0.14 108.95 0.11
16 0.0299 -934.80 -0.02 108.93 -0.02
17 0.0300 -935.47 0.01 108.96 -0.06
18 0.0300 -935.47 0.24 108.96 -0.09
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.
15FZ494 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