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: 17FS247 # Created Sun Apr 27 01:11:08 2025 # Orbit generated from Bernstein formalism # Fitting 43 observations of 43 # Arc: 88.83d # First observation: 2017/01/28 # Last observation: 2017/04/27 Preliminary a, adot, b, bdot, g, gdot: -0.000026 0.044586 0.000053 0.012036 0.031378 0.000000 # Chi-squared of fit: 32.87 DOF: 80 RMS: 0.15 # Min/Max residuals: -0.46 0.38 # Exact a, adot, b, bdot, g, gdot: 1.827144E-05 3.383219E-02 6.333219E-06 1.285250E-02 2.967298E-02 -4.795696E-03 # Covariance matrix: 1.6990E-13 -1.6861E-12 -9.5658E-15 2.5539E-13 1.2464E-13 5.4952E-11 -1.6861E-12 1.5080E-09 7.4118E-12 -1.3832E-10 1.9798E-10 -1.3895E-08 -9.5658E-15 7.4118E-12 1.5970E-13 -1.3141E-12 9.5126E-13 -7.2670E-11 2.5539E-13 -1.3832E-10 -1.3141E-12 1.7575E-11 -1.7313E-11 1.4309E-09 1.2464E-13 1.9798E-10 9.5126E-13 -1.7313E-11 2.7584E-11 -1.5715E-09 5.4952E-11 -1.3895E-08 -7.2670E-11 1.4309E-09 -1.5715E-09 1.7222E-07 # lat0 lon0 xBary yBary zBary JD0 -9.776794 153.744682 0.424323 -0.150991 -0.877276 2457782.031781 # Heliocentric elements and errors Epoch: 2457780.5000 = 2017/01/27 Mean Anomaly: 345.51403 +/- 0.788 Argument of Peri: 6.38182 +/- 1.920 Long of Asc Node: 176.68531 +/- 0.025 Inclination: 22.70344 +/- 0.020 Eccentricity: 0.35613520 +/- 0.0091 Semi-Major Axis: 51.59666031 +/- 0.4341 Time of Perihelion: 2463227.7329 +/- 288.1 Perihelion: 33.22127362 +/- 0.5468 Aphelion: 69.97204699 +/- 0.7533 Period (y) 370.6300 +/- 4.68 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -30.39914727 +/- 0.0053 Ecliptic Y 15.46140394 +/- 0.0026 Ecliptic Z -5.72253617 +/- 0.0010 Ecliptic XDOT -0.00116756 +/- 0.0000 Ecliptic YDOT -0.00291008 +/- 0.0000 Ecliptic ZDOT 0.00124372 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 34.58194018 +/- 0.0048 Geocenter to KBO 33.70069722 +/- 0.0060 # Hcoef: 9.87
The following table shows the complete astrometric record for 17FS247. 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 (17FS247) followed by the observatory code and reference code for the source of the astrometry.
2017 01 28.53098 10 08 29.24 +01 00 32.9 24.8z 17FS247 T09 C~8AiJ 2017 01 28.54440 10 08 29.18 +01 00 33.1 24.6z 17FS247 T09 C~8AiJ 2017 01 28.55779 10 08 29.12 +01 00 33.6 25.1z 17FS247 T09 C~8AiJ 2017 01 28.57125 10 08 29.05 +01 00 33.8 24.4z 17FS247 T09 C~8AiJ 2017 01 28.58466 10 08 28.95 +01 00 34.1 24.2z 17FS247 T09 C~8AiJ 2017 02 02.50623 10 08 04.71 +01 02 54.0 25.3r 17FS247 T09 C~8AiJ 2017 02 02.52479 10 08 04.60 +01 02 54.5 25.1r 17FS247 T09 C~8AiJ 2017 02 02.52702 10 08 04.60 +01 02 54.6 25.1r 17FS247 T09 C~8AiJ 2017 02 02.53379 10 08 04.55 +01 02 55.0 25.1r 17FS247 T09 C~8AiJ 2017 02 02.59348 10 08 04.26 +01 02 56.7 24.9i 17FS247 T09 C~8AiJ 2017 03 04.34714 10 05 28.83 +01 20 41.5 25.6z 17FS247 T09 C~8AiJ 2017 03 04.45958 10 05 28.25 +01 20 45.9 24.8i 17FS247 T09 C~8AiJ 2017 03 04.48135 10 05 28.13 +01 20 46.9 25.2i 17FS247 T09 C~8AiJ 2017 03 04.50300 10 05 28.04 +01 20 47.6 25.2i 17FS247 T09 C~8AiJ 2017 03 22.28630 10 04 04.02 +01 32 51.8 25.9g 17FS247 T09 C~8AiJ 2017 03 22.30012 10 04 03.97 +01 32 52.5 25.8g 17FS247 T09 C~8AiJ 2017 03 22.31401 10 04 03.91 +01 32 53.0 25.8g 17FS247 T09 C~8AiJ 2017 03 22.31838 10 04 03.89 +01 32 53.0 25.9g 17FS247 T09 C~8AiJ 2017 03 22.33948 10 04 03.80 +01 32 54.0 25.5g 17FS247 T09 C~8AiJ 2017 03 22.35217 10 04 03.74 +01 32 54.2 25.9g 17FS247 T09 C~8AiJ 2017 03 22.39453 10 04 03.56 +01 32 56.1 24.3z 17FS247 T09 C~8Q4G 2017 03 22.42021 10 04 03.46 +01 32 57.0 24.9z 17FS247 T09 C~8AiJ 2017 03 22.44588 10 04 03.36 +01 32 58.1 24.5z 17FS247 T09 C~8Q4G 2017 03 22.49332 10 04 03.12 +01 33 00.2 24.8z 17FS247 T09 C~8Q4G 2017 03 29.28039 10 03 35.90 +01 37 33.6 25.9g 17FS247 T09 C~8AiJ 2017 03 29.29433 10 03 35.84 +01 37 34.3 25.8g 17FS247 T09 C~8AiJ 2017 03 29.30827 10 03 35.79 +01 37 34.8 25.9g 17FS247 T09 C~8AiJ 2017 04 23.24643 10 02 28.35 +01 52 44.7 25.3r 17FS247 T09 C~8AiJ 2017 04 23.25033 10 02 28.32 +01 52 45.0 25.6r 17FS247 T09 C~8AiJ 2017 04 23.25417 10 02 28.32 +01 52 44.8 24.9r 17FS247 T09 C~8AiJ 2017 04 23.26183 10 02 28.30 +01 52 45.0 25.8r 17FS247 T09 C~8AiJ 2017 04 23.38014 10 02 28.10 +01 52 49.0 25.3z 17FS247 T09 C~8AiJ 2017 04 26.24796 10 02 24.19 +01 54 18.7 25.4i 17FS247 T09 C~8AiJ 2017 04 26.28251 10 02 24.14 +01 54 20.1 25.6i 17FS247 T09 C~8AiJ 2017 04 26.29400 10 02 24.10 +01 54 19.7 25.4i 17FS247 T09 C~8AiJ 2017 04 26.29783 10 02 24.09 +01 54 20.3 25.4i 17FS247 T09 C~8AiJ 2017 04 26.33400 10 02 24.05 +01 54 21.3 25.9g 17FS247 T09 C~8AiJ 2017 04 27.34452 10 02 22.88 +01 54 52.0 25.1i 17FS247 T09 C~8AiJ 2017 04 27.34835 10 02 22.88 +01 54 52.0 24.9i 17FS247 T09 C~8AiJ 2017 04 27.35218 10 02 22.88 +01 54 52.2 25.2i 17FS247 T09 C~8AiJ 2017 04 27.35601 10 02 22.88 +01 54 52.3 25.3i 17FS247 T09 C~8AiJ 2017 04 27.35984 10 02 22.87 +01 54 52.3 25.1i 17FS247 T09 C~8AiJ 2017 04 27.36375 10 02 22.87 +01 54 52.7 25.0i 17FS247 T09 C~8AiJ
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 0.11
2 0.0000 -0.91 0.09 -0.13 -0.01
3 0.0001 -1.93 0.13 0.01 0.15
4 0.0001 -2.98 0.14 -0.18 -0.02
5 0.0001 -4.49 -0.32 -0.43 -0.26
6 0.0136 -394.02 0.14 0.56 0.02
7 0.0137 -395.74 -0.04 0.44 -0.11
8 0.0137 -395.78 0.10 0.53 -0.02
9 0.0137 -396.62 -0.18 0.64 0.09
10 0.0139 -401.29 0.06 0.67 0.10
11 0.0953 -2958.91 -0.15 164.11 0.10
12 0.0956 -2968.60 -0.05 165.12 0.03
13 0.0957 -2970.64 -0.20 165.41 0.11
14 0.0957 -2972.15 0.17 165.59 0.08
15 0.1444 -4407.91 -0.18 393.15 -0.03
16 0.1445 -4408.86 -0.09 393.54 0.15
17 0.1445 -4409.88 -0.06 393.69 0.09
18 0.1445 -4410.16 -0.01 393.58 -0.08
19 0.1446 -4411.78 -0.03 394.03 0.06
20 0.1446 -4412.69 0.02 393.90 -0.26
21 0.1447 -4415.89 0.02 394.71 -0.07
22 0.1448 -4417.61 0.23 395.02 -0.14
23 0.1449 -4419.40 0.37 395.51 -0.03
24 0.1450 -4423.52 -0.18 396.19 -0.06
25 0.1636 -4902.54 0.09 506.24 -0.16
26 0.1636 -4903.63 -0.05 506.57 -0.06
27 0.1637 -4904.51 0.03 506.77 -0.09
28 0.2319 -6174.41 0.36 996.99 0.32
29 0.2319 -6174.94 -0.03 997.11 0.35
30 0.2320 -6174.86 0.17 996.93 0.08
31 0.2320 -6175.22 0.08 997.01 0.00
32 0.2323 -6179.45 -0.11 999.68 0.16
33 0.2402 -6266.25 0.15 1062.66 0.08
34 0.2403 -6267.45 -0.03 1063.70 0.38
35 0.2403 -6267.87 -0.11 1063.11 -0.46
36 0.2403 -6268.23 -0.35 1063.62 -0.03
37 0.2404 -6269.14 -0.21 1064.34 -0.09
38 0.2432 -6296.50 -0.11 1086.79 -0.08
39 0.2432 -6296.50 -0.01 1086.79 -0.16
40 0.2432 -6296.57 0.03 1086.98 -0.06
41 0.2432 -6296.60 0.10 1087.07 -0.05
42 0.2432 -6296.74 0.06 1087.02 -0.19
43 0.2432 -6296.89 0.03 1087.39 0.10
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.
17FS247 quality flag:2 Type: SCATNEAR CENTAURS SCATNEAR axisobj 51.219 52.078 50.543 ecceobj 0.349 0.369 0.333 incobj 22.771 22.710 22.835 qmin 31.247 29.969 31.148 qmax 72.521 80.342 70.292 amean 51.130 53.601 50.322 amin 50.119 51.127 49.369 amax 52.141 55.763 51.154 emean 0.361 0.408 0.351 emin 0.325 0.362 0.325 emax 0.392 0.442 0.379 imean 21.604 20.884 21.316 imin 20.252 19.057 19.949 imax 23.214 22.418 22.425 excite_mean 0.516 0.542 0.506 fracstop 1.000 1.000 1.000 cjmean 2.849 2.838 2.854 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 176.4 182.0 177.8 kozaiamp 180.0 179.9 180.0