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: 16SW57 # Created Fri Apr 26 01:18:04 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 30 observations of 30 # Arc: 5.06y # First observation: 2013/11/08 # Last observation: 2018/12/01 # Chi-squared of fit: 7.70 DOF: 54 RMS: 0.09 # Min/Max residuals: -0.17 0.22 # Exact a, adot, b, bdot, g, gdot: 1.455084E-05 2.045859E-02 1.901383E-06 1.940047E-03 2.233383E-02 -3.769594E-03 # Covariance matrix: 1.8931E-13 -1.2610E-13 3.8614E-15 -8.8076E-15 -4.4767E-15 -9.3036E-13 -1.2610E-13 2.5117E-13 -1.1886E-14 2.5416E-14 3.1747E-14 2.6837E-12 3.8614E-15 -1.1886E-14 1.6181E-13 -4.6472E-14 -8.2242E-15 -1.3851E-13 -8.8076E-15 2.5416E-14 -4.6472E-14 2.0870E-14 3.9308E-15 2.9277E-13 -4.4767E-15 3.1747E-14 -8.2242E-15 3.9308E-15 1.6678E-13 4.0631E-13 -9.3036E-13 2.6837E-12 -1.3851E-13 2.9277E-13 4.0631E-13 3.0912E-11 # lat0 lon0 xBary yBary zBary JD0 -12.650221 34.681684 -0.188455 -0.212604 -0.947888 2456604.730878 # Heliocentric elements and errors Epoch: 2456604.5000 = 2013/11/08 Mean Anomaly: 285.35171 +/- 0.025 Argument of Peri: 28.69977 +/- 0.018 Long of Asc Node: 100.81177 +/- 0.001 Inclination: 13.52567 +/- 0.000 Eccentricity: 0.17869008 +/- 0.0003 Semi-Major Axis: 46.47088349 +/- 0.0046 Time of Perihelion: 2480597.6444 +/- 15.9 Perihelion: 38.16699765 +/- 0.0129 Aphelion: 54.77476933 +/- 0.0135 Period (y) 316.7959 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 36.61654161 +/- 0.0007 Ecliptic Y 25.56998758 +/- 0.0005 Ecliptic Z -9.80566112 +/- 0.0002 Ecliptic XDOT -0.00176119 +/- 0.0000 Ecliptic YDOT 0.00183373 +/- 0.0000 Ecliptic ZDOT 0.00033339 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.72479782 +/- 0.0006 Geocenter to KBO 44.77527297 +/- 0.0008 # Hcoef: 6.94
The following table shows the complete astrometric record for 16SW57. 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 (16SW57) followed by the observatory code and reference code for the source of the astrometry.
2013 11 08.23010 02 26 30.781 +01 08 29.16 23.4r 16SW57 W84 C~4ybt 2013 11 08.23010 02 26 30.78 +01 08 29.1 23.2r 16SW57 W84 C~3cyl 2013 11 23.21444 02 25 28.411 +01 04 54.22 23.4z 16SW57 W84 C~4ybt 2013 12 01.18848 02 24 58.008 +01 03 41.25 23.1r 16SW57 W84 C~4ybt 2013 12 01.18848 02 24 58.01 +01 03 41.3 23.2r 16SW57 W84 C~3cyl 2013 12 20.13920 02 23 58.769 +01 02 57.95 22.8i 16SW57 W84 C~4ybt 2013 12 20.13920 02 23 58.77 +01 02 57.9 22.9i 16SW57 W84 C~3cyl 2014 10 21.30882 02 32 07.873 +01 44 02.16 23.1r 16SW57 W84 C~4ybt 2014 10 21.30882 02 32 07.87 +01 44 02.2 23.2r 16SW57 W84 C~3cyl 2015 01 16.06930 02 27 31.18 +01 36 13.5 22.0z 16SW57 W84 C~3cyl 2016 09 10.36578 02 43 07.369 +02 59 25.32 23.4r 16SW57 W84 C~4ybt 2016 09 10.36578 02 43 07.37 +02 59 25.3 23.5r 16SW57 W84 C~3cyl 2016 09 27.49201 02 42 19.85 +02 52 35.7 24.6g 16SW57 568 C~2eAJ 2016 09 27.61245 02 42 19.44 +02 52 32.8 24.6g 16SW57 568 C~2eAJ 2016 09 28.50135 02 42 16.49 +02 52 10.9 24.5g 16SW57 568 C~2eAJ 2016 09 28.54927 02 42 16.32 +02 52 09.8 24.6g 16SW57 568 C~2eAJ 2016 09 29.51325 02 42 13.06 +02 51 46.1 24.5g 16SW57 568 C~2eAJ 2016 09 29.56047 02 42 12.89 +02 51 44.9 24.6g 16SW57 568 C~2eAJ 2016 09 29.63378 02 42 12.64 +02 51 43.2 24.7g 16SW57 568 C~2eAJ 2016 12 21.12749 02 36 47.406 +02 30 54.01 23.7r 16SW57 W84 C~4ybt 2016 12 21.12749 02 36 47.41 +02 30 54.0 23.6r 16SW57 W84 C~3cyl 2017 10 30.23247 02 44 34.769 +03 09 49.14 22.9i 16SW57 W84 C~4ybt 2017 11 01.17965 02 44 26.155 +03 09 09.73 23.1z 16SW57 W84 C~4ybt 2017 11 23.14743 02 42 49.988 +03 03 10.03 23.0i 16SW57 W84 C~4ybt 2017 12 08.04071 02 41 51.547 +03 00 58.60 22.3i 16SW57 W84 C~4ybt 2017 12 08.04484 02 41 51.540 +03 00 58.67 23.4r 16SW57 W84 C~4ybt 2017 12 10.10599 02 41 44.215 +03 00 48.73 23.8r 16SW57 W84 C~4ybt 2018 01 05.05704 02 40 35.099 +03 01 49.83 24.5g 16SW57 W84 C~4ybt 2018 11 16.14680 02 47 46.930 +03 34 50.06 23.2i 16SW57 W84 C~4ybt 2018 12 01.16418 02 46 43.454 +03 31 46.23 23.1r 16SW57 W84 C~4ybt
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 0.02 0.00 -0.11
2 0.0000 0.00 0.04 0.00 -0.05
3 0.0410 0.00 0.09 0.00 -0.17
4 0.0629 0.00 -0.07 0.00 0.06
5 0.0629 0.00 -0.10 0.00 0.01
6 0.1147 0.00 -0.04 0.00 0.04
7 0.1147 0.00 -0.05 0.00 0.09
8 0.9502 0.00 0.03 0.00 -0.06
9 0.9502 0.00 0.08 0.00 -0.10
10 1.1878 0.00 0.19 0.00 0.14
11 2.8395 0.00 -0.00 0.00 -0.07
12 2.8395 0.00 -0.02 0.00 -0.05
13 2.8864 0.00 -0.03 0.00 0.08
14 2.8867 0.00 -0.07 0.00 0.14
15 2.8892 0.00 0.02 0.00 0.07
16 2.8893 0.00 -0.06 0.00 0.15
17 2.8919 0.00 -0.00 0.00 0.15
18 2.8921 0.00 -0.08 0.00 0.11
19 2.8923 0.00 0.01 0.00 0.21
20 3.1181 0.00 -0.04 0.00 -0.13
21 3.1181 0.00 -0.10 0.00 -0.12
22 3.9754 0.00 0.22 0.00 -0.02
23 3.9807 0.00 -0.05 0.00 -0.04
24 4.0408 0.00 -0.11 0.00 -0.15
25 4.0816 0.00 0.00 0.00 -0.09
26 4.0816 0.00 0.12 0.00 0.00
27 4.0873 0.00 0.02 0.00 -0.03
28 4.1583 0.00 0.03 0.00 0.02
29 5.0210 0.00 0.01 0.00 -0.03
30 5.0621 0.00 0.06 0.00 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.
16SW57 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 46.689 46.689 46.689 ecceobj 0.175 0.175 0.175 incobj 13.533 13.533 13.533 qmin 37.158 37.188 37.199 qmax 55.951 55.945 55.957 amean 46.338 46.334 46.341 amin 45.926 45.919 45.941 amax 46.829 46.801 46.826 emean 0.180 0.180 0.180 emin 0.166 0.166 0.166 emax 0.195 0.195 0.195 imean 11.892 11.867 11.898 imin 11.338 11.317 11.342 imax 12.521 12.469 12.517 excite_mean 0.274 0.273 0.274 fracstop 1.000 1.000 1.000 cjmean 3.038 3.038 3.038 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 174.0 173.9 173.8 kozaiamp 179.9 179.9 180.0