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: 15FQ490 # Created Sat Feb 22 02:10:23 2025 # Orbit generated from Bernstein formalism # Fitting 28 observations of 28 # Arc: 1.01y # First observation: 2014/03/25 # Last observation: 2015/03/29 Preliminary a, adot, b, bdot, g, gdot: -0.000004 0.020831 0.000001 0.002142 0.022542 0.000000 # Chi-squared of fit: 13.60 DOF: 50 RMS: 0.12 # Min/Max residuals: -0.26 0.24 # Exact a, adot, b, bdot, g, gdot: 1.558432E-05 2.068630E-02 1.800951E-06 2.127399E-03 2.268227E-02 -6.665862E-03 # Covariance matrix: 2.5465E-13 7.2714E-12 -2.6701E-14 8.0063E-13 6.7729E-12 3.6165E-10 7.2714E-12 4.0298E-10 -1.3601E-12 4.3493E-11 3.4058E-10 1.9707E-08 -2.6701E-14 -1.3601E-12 1.1054E-13 -2.5363E-13 -1.2193E-12 -6.6634E-11 8.0063E-13 4.3493E-11 -2.5363E-13 4.9082E-12 3.6931E-11 2.1283E-09 6.7729E-12 3.4058E-10 -1.2193E-12 3.6931E-11 3.0869E-10 1.6690E-08 3.6165E-10 1.9707E-08 -6.6634E-11 2.1283E-09 1.6690E-08 9.6431E-07 # lat0 lon0 xBary yBary zBary JD0 13.823376 -146.437145 0.480596 0.208523 -0.847129 2456742.028908 # Heliocentric elements and errors Epoch: 2456740.5000 = 2014/03/24 Mean Anomaly: 297.57537 +/- 4.460 Argument of Peri: 165.97256 +/- 1.136 Long of Asc Node: 146.81059 +/- 0.036 Inclination: 14.77285 +/- 0.004 Eccentricity: 0.31779277 +/- 0.0448 Semi-Major Axis: 47.46025489 +/- 1.5009 Time of Perihelion: 2477448.9230 +/- 1106.3 Perihelion: 32.37772914 +/- 2.3582 Aphelion: 62.54278064 +/- 2.9026 Period (y) 326.9665 +/- 15.51 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.66678139 +/- 0.0276 Ecliptic Y -23.74815033 +/- 0.0183 Ecliptic Z 10.53386555 +/- 0.0082 Ecliptic XDOT 0.00207700 +/- 0.0001 Ecliptic YDOT -0.00161795 +/- 0.0001 Ecliptic ZDOT 0.00005724 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.93762148 +/- 0.0246 Geocenter to KBO 44.08729913 +/- 0.0341 # Hcoef: 7.29
The following table shows the complete astrometric record for 15FQ490. 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 (15FQ490) followed by the observatory code and reference code for the source of the astrometry.
2014 03 25.52813 14 23 56.69 +00 19 29.8 23.2y 15FQ490 T09 C~8eRi 2014 03 25.55300 14 23 56.63 +00 19 30.5 23.5y 15FQ490 T09 C~8eRi 2014 03 25.60051 14 23 56.45 +00 19 32.0 23.1y 15FQ490 T09 C~8eRi 2014 03 25.61630 14 23 56.41 +00 19 32.4 23.6y 15FQ490 T09 C~8eRi 2014 03 25.61968 14 23 56.38 +00 19 32.4 23.2y 15FQ490 T09 C~8eRi 2014 03 25.62569 14 23 56.36 +00 19 32.5 23.3y 15FQ490 T09 C~8eRi 2014 03 28.52423 14 23 46.21 +00 20 57.9 23.9i 15FQ490 T09 C~8eRi 2014 03 28.53200 14 23 46.20 +00 20 58.2 23.6i 15FQ490 T09 C~8eRi 2014 03 28.54181 14 23 46.16 +00 20 58.5 23.6i 15FQ490 T09 C~8eRi 2014 03 28.55746 14 23 46.10 +00 20 59.2 23.8i 15FQ490 T09 C~8eRi 2014 03 28.57539 14 23 46.04 +00 20 59.5 23.6i 15FQ490 T09 C~8eRi 2014 03 28.59624 14 23 45.95 +00 21 00.2 23.5i 15FQ490 T09 C~8eRi 2014 03 28.59923 14 23 45.95 +00 21 00.2 23.6i 15FQ490 T09 C~8eRi 2014 03 28.61156 14 23 45.91 +00 21 00.6 23.6i 15FQ490 T09 C~8eRi 2015 03 18.60439 14 28 59.65 -00 00 52.1 23.8r 15FQ490 T09 C~8eRi 2015 03 18.63317 14 28 59.56 -00 00 51.4 23.8r 15FQ490 T09 C~8eRi 2015 03 18.64048 14 28 59.53 -00 00 51.1 23.9r 15FQ490 T09 C~8eRi 2015 03 18.64474 14 28 59.52 -00 00 51.1 23.9r 15FQ490 T09 C~8eRi 2015 03 25.58363 14 28 37.41 +00 02 33.7 24.6g 15FQ490 T09 C~8eRi 2015 03 25.61154 14 28 37.32 +00 02 34.6 24.8g 15FQ490 T09 C~8eRi 2015 03 25.61869 14 28 37.27 +00 02 34.7 24.7g 15FQ490 T09 C~8eRi 2015 03 29.47724 14 28 23.88 +00 04 28.6 23.2y 15FQ490 T09 C~8eRi 2015 03 29.54534 14 28 23.63 +00 04 30.1 23.0z 15FQ490 T09 C~8eRi 2015 03 29.55854 14 28 23.57 +00 04 30.8 23.8z 15FQ490 T09 C~8eRi 2015 03 29.59028 14 28 23.47 +00 04 31.6 23.4z 15FQ490 T09 C~8eRi 2015 03 29.61216 14 28 23.38 +00 04 32.5 23.7z 15FQ490 T09 C~8eRi 2015 03 29.61487 14 28 23.39 +00 04 32.5 23.6z 15FQ490 T09 C~8eRi 2015 03 29.62586 14 28 23.32 +00 04 32.6 23.6z 15FQ490 T09 C~8eRi
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 -0.07
2 0.0001 -1.08 0.16 0.36 0.04
3 0.0002 -4.13 -0.07 0.88 0.06
4 0.0002 -4.82 0.17 1.06 0.08
5 0.0003 -5.25 -0.06 0.91 -0.11
6 0.0003 -5.57 -0.02 0.91 -0.18
7 0.0082 -177.51 -0.12 31.01 -0.16
8 0.0082 -177.75 0.12 31.25 0.00
9 0.0083 -178.42 0.05 31.33 -0.01
10 0.0083 -179.50 -0.07 31.69 0.21
11 0.0083 -180.45 0.08 31.68 0.02
12 0.0084 -181.95 -0.14 31.89 0.03
13 0.0084 -181.95 0.04 31.89 0.01
14 0.0084 -182.65 0.10 32.07 0.07
15 0.9804 4693.29 0.04 353.73 0.19
16 0.9804 4691.78 0.06 353.94 0.04
17 0.9805 4691.26 -0.08 354.08 0.08
18 0.9805 4691.12 0.01 354.03 -0.03
19 0.9995 4310.15 0.07 437.31 -0.13
20 0.9995 4308.57 0.13 437.71 -0.03
21 0.9996 4307.83 -0.19 437.56 -0.26
22 1.0101 4080.49 -0.03 478.43 0.24
23 1.0103 4076.45 0.12 478.60 -0.23
24 1.0104 4075.37 -0.15 478.96 0.01
25 1.0104 4073.69 0.11 479.22 -0.04
26 1.0105 4072.11 -0.12 479.62 0.16
27 1.0105 4072.26 0.19 479.67 0.18
28 1.0105 4071.23 -0.16 479.42 -0.18
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.
15FQ490 quality flag:1 Type: 2:1E CENTAURR 9:5EEEE axisobj 47.202 52.645 44.192 ecceobj 0.321 0.445 0.198 incobj 14.801 14.789 14.812 qmin 31.815 29.131 35.257 qmax 65.090 81.056 54.375 amean 47.797 54.021 44.554 amin 47.014 52.169 44.096 amax 48.723 55.305 45.083 emean 0.321 0.453 0.189 emin 0.305 0.435 0.172 emax 0.337 0.467 0.207 imean 13.925 13.440 14.196 imin 13.391 13.090 13.397 imax 14.454 13.654 14.882 excite_mean 0.401 0.509 0.310 fracstop 1.000 0.026 1.000 cjmean 2.947 2.885 2.992 libcent 0 179.6 -180.0 183.0 libamp 0 161.4 -180.0 156.9 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 188.1 179.4 186.9 kozaiamp 180.0 14.9 180.0