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: 16SL56 # Created Sun Feb 23 02:10:55 2025 # Orbit generated from Bernstein formalism # Fitting 9 observations of 9 # Arc: 22.06d # First observation: 2016/09/07 # Last observation: 2016/09/29 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.024916 -0.000000 0.009826 0.025756 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 1.72 DOF: 13 RMS: 0.08 # Min/Max residuals: -0.20 0.15 # Exact a, adot, b, bdot, g, gdot: 1.294565E-05 2.163493E-02 5.306557E-06 9.247153E-03 2.498622E-02 -8.663838E-03 # Covariance matrix: 1.8049E-12 2.1754E-09 2.5588E-13 3.6705E-10 4.4546E-10 1.0942E-08 2.1754E-09 3.5977E-06 4.2134E-10 6.0449E-07 7.3319E-07 1.7470E-05 2.5588E-13 4.2134E-10 5.2824E-13 6.2454E-11 8.5972E-11 2.1297E-09 3.6705E-10 6.0449E-07 6.2454E-11 1.0182E-07 1.2329E-07 3.0114E-06 4.4546E-10 7.3319E-07 8.5972E-11 1.2329E-07 1.4976E-07 3.8384E-06 1.0942E-08 1.7470E-05 2.1297E-09 3.0114E-06 3.8384E-06 3.1924E-04 # lat0 lon0 xBary yBary zBary JD0 -13.227769 32.399828 0.739855 -0.157287 -0.669801 2457639.032039 # Heliocentric elements and errors Epoch: 2457630.5000 = 2016/08/30 Mean Anomaly: 296.03841 +/- 71.260 Argument of Peri: 75.75285 +/- 23.251 Long of Asc Node: 59.05452 +/- 1.607 Inclination: 26.40268 +/- 1.236 Eccentricity: 0.36261391 +/- 0.6714 Semi-Major Axis: 42.12774061 +/- 20.8372 Time of Perihelion: 2475375.1494 +/- 14747.9 Perihelion: 26.85163582 +/- 31.2492 Aphelion: 57.40384540 +/- 40.0785 Period (y) 273.4390 +/- 202.87 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 33.86872134 +/- 0.5095 Ecliptic Y 20.61710657 +/- 0.3233 Ecliptic Z -9.15773860 +/- 0.1418 Ecliptic XDOT -0.00185311 +/- 0.0016 Ecliptic YDOT 0.00162372 +/- 0.0011 Ecliptic ZDOT 0.00120357 +/- 0.0004 # Distances at JD0 (AU) Heliocenter to KBO 40.69422004 +/- 0.4557 Geocenter to KBO 40.02205561 +/- 0.6199 # Hcoef: 8.00
The following table shows the complete astrometric record for 16SL56. 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 (16SL56) followed by the observatory code and reference code for the source of the astrometry.
2016 09 07.53125 02 18 53.16 -00 08 26.8 24.0r 16SL56 T09 C~8eVS 2016 09 07.55118 02 18 53.09 -00 08 27.4 24.1r 16SL56 T09 C~8eVS 2016 09 07.59980 02 18 52.95 -00 08 28.9 24.2r 16SL56 T09 C~8eVS 2016 09 27.45010 02 17 42.99 -00 17 06.3 24.4g 16SL56 568 C~2eAI 2016 09 27.61902 02 17 42.28 -00 17 10.8 24.5g 16SL56 568 C~2eAI 2016 09 28.45917 02 17 38.79 -00 17 33.0 24.4g 16SL56 568 C~2eAI 2016 09 28.51982 02 17 38.53 -00 17 34.5 24.5g 16SL56 568 C~2eAI 2016 09 29.47095 02 17 34.52 -00 17 59.6 24.7g 16SL56 568 C~2eAI 2016 09 29.59118 02 17 34.00 -00 18 02.7 24.6g 16SL56 568 C~2eAI
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 0.15 0.00 0.11
2 0.0001 -1.19 -0.05 -0.21 0.08
3 0.0002 -3.67 -0.11 -0.92 -0.20
4 0.0545 -1165.89 -0.01 -135.83 0.06
5 0.0550 -1177.44 0.02 -136.49 0.00
6 0.0573 -1234.20 -0.00 -139.82 -0.06
7 0.0575 -1238.38 0.02 -139.93 0.03
8 0.0601 -1303.47 -0.03 -143.37 -0.04
9 0.0604 -1311.86 -0.00 -143.67 0.01
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.
16SL56 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