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: 15FZ489 # Created Sun Oct 19 01:10:48 2025 # Orbit generated from Bernstein formalism # Fitting 33 observations of 33 # Arc: 62.84d # First observation: 2015/01/16 # Last observation: 2015/03/20 Preliminary a, adot, b, bdot, g, gdot: 0.000001 0.031265 0.000000 0.014841 0.027416 0.000000 # Chi-squared of fit: 29.73 DOF: 60 RMS: 0.17 # Min/Max residuals: -0.43 0.59 # Exact a, adot, b, bdot, g, gdot: 1.914431E-05 3.108479E-02 8.967340E-06 1.482294E-02 2.736239E-02 9.620018E-03 # Covariance matrix: 1.7126E-13 9.0339E-11 4.8968E-14 3.7247E-12 1.9072E-11 1.0677E-09 9.0339E-11 1.8302E-07 9.9184E-11 4.9855E-09 3.4473E-08 1.1154E-06 4.8968E-14 9.9184E-11 1.1486E-13 2.2888E-12 1.8676E-11 6.0283E-10 3.7247E-12 4.9855E-09 2.2888E-12 1.6994E-10 9.7713E-10 4.0278E-08 1.9072E-11 3.4473E-08 1.8676E-11 9.7713E-10 6.5535E-09 2.2574E-07 1.0677E-09 1.1154E-06 6.0283E-10 4.0278E-08 2.2574E-07 1.0863E-05 # lat0 lon0 xBary yBary zBary JD0 -9.042598 152.049575 0.581686 -0.124150 -0.781133 2457039.032208 # Heliocentric elements and errors Epoch: 2457030.5000 = 2015/01/08 Mean Anomaly: 6.43248 +/- 2.631 Argument of Peri: 301.84173 +/- 9.170 Long of Asc Node: 169.28299 +/- 0.249 Inclination: 26.57500 +/- 0.309 Eccentricity: 0.65229811 +/- 0.1054 Semi-Major Axis: 98.37031154 +/- 24.6479 Time of Perihelion: 2450662.9754 +/- 1027.0 Perihelion: 34.20354346 +/- 13.4482 Aphelion: 162.53707962 +/- 42.0237 Period (y) 975.6730 +/- 366.70 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -32.31157453 +/- 0.0943 Ecliptic Y 17.80146301 +/- 0.0501 Ecliptic Z -5.74367059 +/- 0.0170 Ecliptic XDOT -0.00250734 +/- 0.0003 Ecliptic YDOT -0.00219803 +/- 0.0001 Ecliptic ZDOT 0.00131354 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 37.33523384 +/- 0.0851 Geocenter to KBO 36.54651345 +/- 0.1081 # Hcoef: 9.90
The following table shows the complete astrometric record for 15FZ489. 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 (15FZ489) followed by the observatory code and reference code for the source of the astrometry.
2015 01 16.53143 10 03 16.20 +02 17 17.2 25.3z 15FZ489 T09 C~8eRg 2015 01 16.53924 10 03 16.18 +02 17 17.6 25.3z 15FZ489 T09 C~94q2 2015 01 16.54315 10 03 16.17 +02 17 17.4 25.3z 15FZ489 T09 C~8eRg 2015 01 16.54710 10 03 16.13 +02 17 17.6 25.9z 15FZ489 T09 C~94q2 2015 01 16.57632 10 03 16.08 +02 17 18.1 25.0z 15FZ489 T09 C~94q2 2015 01 16.58435 10 03 16.04 +02 17 18.4 24.8z 15FZ489 T09 C~94q2 2015 01 16.60661 10 03 15.92 +02 17 18.7 24.7z 15FZ489 T09 C~8eRg 2015 01 16.62952 10 03 15.82 +02 17 19.2 25.6z 15FZ489 T09 C~8eRg 2015 01 16.64776 10 03 15.75 +02 17 19.2 24.7z 15FZ489 T09 C~8eRg 2015 01 17.40063 10 03 12.83 +02 17 35.9 26.0i 15FZ489 T09 C~8eRg 2015 01 17.41437 10 03 12.77 +02 17 35.7 25.3i 15FZ489 T09 C~8eRg 2015 01 17.42357 10 03 12.72 +02 17 36.4 25.4i 15FZ489 T09 C~8eRg 2015 01 19.42426 10 03 04.75 +02 18 20.0 25.7z 15FZ489 T09 C~8eRg 2015 01 19.43347 10 03 04.71 +02 18 20.3 25.9z 15FZ489 T09 C~8eRg 2015 01 19.44263 10 03 04.68 +02 18 20.5 25.6z 15FZ489 T09 C~8eRg 2015 01 20.44268 10 03 00.59 +02 18 43.3 26.6g 15FZ489 T09 C~8eRg 2015 01 20.45227 10 03 00.54 +02 18 43.8 26.6g 15FZ489 T09 C~8eRg 2015 01 21.56653 10 02 55.94 +02 19 09.9 25.3i 15FZ489 T09 C~8eRg 2015 01 21.57962 10 02 55.87 +02 19 10.2 25.1i 15FZ489 T09 C~8eRg 2015 01 21.58764 10 02 55.85 +02 19 10.4 25.1i 15FZ489 T09 C~8eRg 2015 01 21.59154 10 02 55.83 +02 19 10.4 25.3i 15FZ489 T09 C~8eRg 2015 01 21.59540 10 02 55.80 +02 19 10.6 25.7i 15FZ489 T09 C~8eRg 2015 01 21.60626 10 02 55.76 +02 19 10.9 25.5i 15FZ489 T09 C~8eRg 2015 01 21.61354 10 02 55.74 +02 19 11.1 25.4i 15FZ489 T09 C~8eRg 2015 01 21.61742 10 02 55.71 +02 19 11.2 25.3i 15FZ489 T09 C~8eRg 2015 01 21.62126 10 02 55.69 +02 19 11.4 25.6i 15FZ489 T09 C~8eRg 2015 03 18.39076 09 58 38.20 +02 50 43.4 25.5r 15FZ489 T09 C~8eRg 2015 03 18.42974 09 58 38.04 +02 50 44.9 25.9r 15FZ489 T09 C~8eRg 2015 03 18.44066 09 58 38.00 +02 50 45.3 25.5r 15FZ489 T09 C~8eRg 2015 03 18.44789 09 58 37.97 +02 50 45.8 26.2r 15FZ489 T09 C~8eRg 2015 03 20.33757 09 58 30.41 +02 51 58.1 25.2i 15FZ489 T09 C~8eRg 2015 03 20.35412 09 58 30.35 +02 51 58.6 25.2i 15FZ489 T09 C~8eRg 2015 03 20.36873 09 58 30.29 +02 51 59.3 25.2i 15FZ489 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 -0.24 0.00 -0.08
2 0.0000 -0.42 -0.17 0.27 0.20
3 0.0000 -0.49 0.01 0.03 -0.04
4 0.0000 -1.12 -0.38 0.01 -0.06
5 0.0001 -2.00 0.59 0.21 0.19
6 0.0001 -2.67 0.43 0.28 0.27
7 0.0002 -4.46 0.05 -0.07 -0.05
8 0.0003 -6.03 -0.09 -0.13 -0.08
9 0.0003 -7.02 0.08 -0.50 -0.43
10 0.0024 -53.86 -0.12 -0.26 0.25
11 0.0024 -54.63 -0.01 -0.76 -0.24
12 0.0024 -55.58 -0.37 -0.37 0.16
13 0.0079 -182.74 0.10 -1.56 -0.18
14 0.0079 -183.40 0.04 -1.49 -0.11
15 0.0080 -183.89 0.15 -1.46 -0.07
16 0.0107 -249.30 0.05 -1.67 -0.20
17 0.0107 -250.17 -0.18 -1.46 0.00
18 0.0138 -323.89 0.14 -1.27 0.07
19 0.0138 -324.98 -0.06 -1.36 -0.02
20 0.0138 -325.33 0.14 -1.28 0.06
21 0.0139 -325.61 0.12 -1.38 -0.04
22 0.0139 -326.10 -0.11 -1.35 -0.01
23 0.0139 -326.77 -0.03 -1.28 0.06
24 0.0139 -327.12 0.11 -1.20 0.14
25 0.0139 -327.58 -0.08 -1.27 0.08
26 0.0139 -327.93 -0.17 -1.18 0.16
27 0.1666 -4605.81 -0.07 415.20 -0.10
28 0.1667 -4608.58 -0.04 415.77 -0.08
29 0.1668 -4609.29 0.04 415.93 -0.07
30 0.1668 -4609.88 -0.04 416.24 0.14
31 0.1720 -4741.37 -0.04 444.23 0.05
32 0.1720 -4742.39 0.10 444.38 -0.04
33 0.1720 -4743.48 0.04 444.72 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.
15FZ489 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