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: 17SE277 # Created Sat Apr 27 01:18:17 2024 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 4.98y # First observation: 2013/09/23 # Last observation: 2018/09/15 Preliminary a, adot, b, bdot, g, gdot: -0.000533 0.028312 -0.000052 0.007089 0.025999 0.000000 # Chi-squared of fit: 1.45 DOF: 10 RMS: 0.08 # Min/Max residuals: -0.14 0.18 # Exact a, adot, b, bdot, g, gdot: 1.788904E-05 2.749913E-02 4.763323E-06 6.930669E-03 2.412679E-02 -5.839323E-03 # Covariance matrix: 1.2110E-12 -8.0548E-13 4.1054E-14 -1.2574E-13 -1.1107E-12 -4.2201E-12 -8.0548E-13 1.0814E-12 -9.1477E-14 2.3136E-13 1.3391E-12 7.3175E-12 4.1054E-14 -9.1477E-14 8.7735E-13 -2.4544E-13 2.5134E-13 -7.1442E-13 -1.2574E-13 2.3136E-13 -2.4544E-13 1.2814E-13 2.7174E-14 1.7104E-12 -1.1107E-12 1.3391E-12 2.5134E-13 2.7174E-14 1.1741E-11 8.2146E-12 -4.2201E-12 7.3175E-12 -7.1442E-13 1.7104E-12 8.2146E-12 5.3028E-11 # lat0 lon0 xBary yBary zBary JD0 -27.445979 -60.884919 -0.883288 -0.219478 -0.422771 2456559.498458 # Heliocentric elements and errors Epoch: 2456550.5000 = 2013/09/15 Mean Anomaly: 352.37448 +/- 0.019 Argument of Peri: 326.31700 +/- 0.037 Long of Asc Node: 0.42837 +/- 0.001 Inclination: 30.63379 +/- 0.000 Eccentricity: 0.54499413 +/- 0.0006 Semi-Major Axis: 87.72991376 +/- 0.1338 Time of Perihelion: 2462908.0060 +/- 7.1 Perihelion: 39.91762545 +/- 0.0829 Aphelion: 135.54220206 +/- 0.2143 Period (y) 821.7312 +/- 1.88 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 18.90089940 +/- 0.0026 Ecliptic Y -32.11853811 +/- 0.0046 Ecliptic Z -19.10357770 +/- 0.0027 Ecliptic XDOT 0.00261032 +/- 0.0000 Ecliptic YDOT 0.00171412 +/- 0.0000 Ecliptic ZDOT 0.00100351 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.87828995 +/- 0.0039 Geocenter to KBO 41.44769969 +/- 0.0059 # Hcoef: 7.52
The following table shows the complete astrometric record for 17SE277. 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 (17SE277) followed by the observatory code and reference code for the source of the astrometry.
2013 09 23.99768 20 37 06.414 -46 59 37.69 23.5i 17SE277 W84 C~52co 2014 09 12.05921 20 46 02.580 -46 13 38.68 23.9r 17SE277 W84 C~52co 2016 09 22.00821 21 01 01.070 -44 19 20.88 23.2r 17SE277 W84 C~52co 2017 09 27.00105 21 08 18.575 -43 18 32.31 23.2z 17SE277 W84 C~52co 2017 09 27.00243 21 08 18.555 -43 18 32.27 24.0i 17SE277 W84 C~52co 2017 10 13.06273 21 07 33.900 -43 10 11.78 24.7g 17SE277 W84 C~52co 2017 10 30.04464 21 07 20.502 -42 58 32.55 23.1z 17SE277 W84 C~52co 2018 09 15.22772 21 16 36.088 -42 21 10.49 23.8r 17SE277 W84 C~52co
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 0.03 0.00 -0.05
2 0.9666 6096.83 -0.02 991.55 0.06
3 2.9952 17362.39 -0.14 4310.92 -0.07
4 4.0082 23161.79 0.18 5996.79 -0.04
5 4.0082 23161.60 0.03 5996.91 0.03
6 4.0522 22893.80 0.00 6647.70 0.12
7 4.0987 23020.83 0.00 7356.70 0.01
8 4.9753 29649.64 -0.08 7078.87 -0.07
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.
17SE277 quality flag:2 Type: SCATNEAR SCATNEAR 5:1EEEE Type: 5:1EEII Type: 5:1IIII axisobj 88.256 88.631 87.883 ecceobj 0.548 0.550 0.547 incobj 30.621 30.621 30.621 qmin 37.269 38.129 37.830 qmax 141.505 142.510 141.110 amean 87.967 88.815 88.040 amin 86.367 87.495 86.667 amax 90.192 90.750 90.020 emean 0.551 0.553 0.554 emin 0.531 0.537 0.539 emax 0.575 0.570 0.569 imean 30.688 30.837 30.507 imin 29.287 30.127 29.615 imax 31.763 31.671 31.377 excite_mean 0.751 0.754 0.751 fracstop 1.000 1.000 1.000 cjmean 2.795 2.796 2.795 libcent 0 -180.0 -180.0 284.7 libamp 0 -180.0 -180.0 36.3 libcent 1 -180.0 -180.0 222.4 libamp 1 -180.0 -180.0 39.8 libcent 2 -180.0 -180.0 159.9 libamp 2 -180.0 -180.0 44.5 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 136.7 122.1 328.7 kozaiamp 180.0 180.0 3.6