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: 17EU57 # Created Sun Dec 22 02:11:00 2024 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 2.28y # First observation: 2017/01/26 # Last observation: 2019/05/09 Preliminary a, adot, b, bdot, g, gdot: 0.000032 0.031779 0.000007 0.004305 0.027522 0.000000 # Chi-squared of fit: 6.10 DOF: 26 RMS: 0.11 # Min/Max residuals: -0.19 0.29 # Exact a, adot, b, bdot, g, gdot: 1.785415E-05 3.181512E-02 2.189255E-06 4.357984E-03 2.737845E-02 -4.151558E-03 # Covariance matrix: 1.4624E-13 -4.0149E-13 1.1803E-14 -1.3079E-13 5.0690E-14 -1.0000E-11 -4.0149E-13 1.5039E-11 -4.2279E-13 4.8962E-12 2.2633E-12 3.9219E-10 1.1803E-14 -4.2279E-13 1.3391E-13 -2.1092E-13 -5.0481E-14 -1.1312E-11 -1.3079E-13 4.8962E-12 -2.1092E-13 1.7970E-12 6.1928E-13 1.3058E-10 5.0690E-14 2.2633E-12 -5.0481E-14 6.1928E-13 9.3950E-13 5.2402E-11 -1.0000E-11 3.9219E-10 -1.1312E-11 1.3058E-10 5.2402E-11 1.0425E-08 # lat0 lon0 xBary yBary zBary JD0 -11.432051 149.590003 0.391964 -0.179162 -0.886899 2457779.972801 # Heliocentric elements and errors Epoch: 2457770.5000 = 2017/01/17 Mean Anomaly: 345.76181 +/- 0.247 Argument of Peri: 335.29882 +/- 0.597 Long of Asc Node: 204.05103 +/- 0.003 Inclination: 13.52658 +/- 0.000 Eccentricity: 0.35485892 +/- 0.0019 Semi-Major Axis: 55.80988070 +/- 0.0714 Time of Perihelion: 2463793.5628 +/- 103.6 Perihelion: 36.00524650 +/- 0.1131 Aphelion: 75.61451490 +/- 0.1415 Period (y) 416.9412 +/- 0.80 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.46079434 +/- 0.0011 Ecliptic Y 18.91299946 +/- 0.0006 Ecliptic Z -7.23942574 +/- 0.0003 Ecliptic XDOT -0.00133113 +/- 0.0000 Ecliptic YDOT -0.00291277 +/- 0.0000 Ecliptic ZDOT 0.00050938 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.41513616 +/- 0.0010 Geocenter to KBO 36.52508048 +/- 0.0013 # Hcoef: 8.90
The following table shows the complete astrometric record for 17EU57. 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 (17EU57) followed by the observatory code and reference code for the source of the astrometry.
2017 01 26.47200 09 50 51.99 +00 53 18.0 24.3z 17EU57 T09 C~89Uc 2017 01 26.47736 09 50 51.97 +00 53 17.8 24.3z 17EU57 T09 C~89Uc 2017 01 26.50415 09 50 51.84 +00 53 18.5 24.2z 17EU57 T09 C~89Uc 2017 01 26.57497 09 50 51.48 +00 53 20.0 23.6z 17EU57 T09 C~89Uc 2017 01 26.58838 09 50 51.43 +00 53 20.4 24.3z 17EU57 T09 C~89Uc 2017 01 26.60185 09 50 51.35 +00 53 20.5 24.6z 17EU57 T09 C~89Uc 2017 02 02.371097 09 50 19.04 +00 55 47.3 17EU57 T09 C~89Uc 2017 02 02.401848 09 50 18.89 +00 55 48.0 17EU57 T09 C~89Uc 2017 03 06.36925 09 47 42.05 +01 11 23.1 24.7i 17EU57 T09 C~89Uc 2017 03 06.38322 09 47 42.00 +01 11 23.5 24.7i 17EU57 T09 C~89Uc 2017 03 06.39715 09 47 41.93 +01 11 24.0 24.9i 17EU57 T09 C~89Uc 2017 03 06.43773 09 47 41.73 +01 11 25.2 24.4i 17EU57 T09 C~89Uc 2018 01 17.507604 09 58 45.98 +00 27 01.1 17EU57 T09 C~89Uc 2018 01 17.534630 09 58 45.86 +00 27 01.6 17EU57 T09 C~89Uc 2019 05 09.252585 09 59 22.94 +00 56 22.7 17EU57 T09 C~89Uc 2019 05 09.375023 09 59 22.94 +00 56 25.1 17EU57 T09 C~89Uc
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 0.11 0.00 0.07
2 0.0000 -0.21 0.29 -0.29 -0.19
3 0.0001 -2.28 0.20 -0.30 -0.05
4 0.0003 -7.87 -0.16 -0.75 -0.08
5 0.0003 -8.71 -0.01 -0.63 0.12
6 0.0004 -9.87 -0.18 -0.95 -0.12
7 0.0189 -515.42 -0.01 -29.31 0.06
8 0.0190 -517.77 0.03 -29.42 0.06
9 0.1065 -3048.23 -0.17 42.25 0.05
10 0.1065 -3049.07 0.07 42.37 0.07
11 0.1066 -3050.23 -0.00 42.48 0.08
12 0.1067 -3053.46 -0.09 42.58 -0.11
13 0.9748 7221.63 -0.01 960.00 0.00
14 0.9748 7219.76 -0.13 959.86 0.08
15 2.2800 7137.21 0.05 2806.10 0.03
16 2.2804 7136.39 0.02 2808.36 -0.08
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.
17EU57 quality flag:3 Type: 5:2EEE 5:2EEE 5:2EEE axisobj 55.371 55.446 55.310 ecceobj 0.348 0.351 0.345 incobj 13.549 13.549 13.549 qmin 35.444 35.322 35.509 qmax 76.987 77.089 76.984 amean 55.463 55.463 55.463 amin 54.634 54.609 54.589 amax 56.506 56.489 56.518 emean 0.350 0.352 0.348 emin 0.336 0.340 0.335 emax 0.363 0.366 0.363 imean 13.934 13.898 13.880 imin 13.724 13.678 13.468 imax 14.191 14.130 14.171 excite_mean 0.424 0.426 0.422 fracstop 1.000 1.000 1.000 cjmean 3.011 3.009 3.013 libcent 0 181.6 180.0 179.4 libamp 0 153.6 153.8 158.6 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 156.6 159.0 171.8 kozaiamp 180.0 180.0 180.0