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: 16SN56 # Created Sun Apr 27 01:10:59 2025 # Orbit generated from Bernstein formalism # Fitting 30 observations of 30 # Arc: 4.24y # First observation: 2014/08/19 # Last observation: 2018/11/16 Preliminary a, adot, b, bdot, g, gdot: -0.000093 0.019481 -0.000053 0.008463 0.022900 0.000000 # Chi-squared of fit: 10.13 DOF: 54 RMS: 0.10 # Min/Max residuals: -0.29 0.26 # Exact a, adot, b, bdot, g, gdot: 1.349829E-05 1.898195E-02 5.170543E-06 8.254697E-03 2.234481E-02 -3.790409E-03 # Covariance matrix: 3.9431E-13 -1.9350E-13 4.5174E-14 -4.7440E-14 1.6284E-15 -1.3257E-12 -1.9350E-13 2.8061E-13 -7.3130E-14 1.0993E-13 2.7036E-13 3.1465E-12 4.5174E-14 -7.3130E-14 3.2639E-13 -1.4065E-13 -5.4138E-14 -1.0138E-12 -4.7440E-14 1.0993E-13 -1.4065E-13 9.5366E-14 1.1505E-13 1.4752E-12 1.6284E-15 2.7036E-13 -5.4138E-14 1.1505E-13 4.7755E-13 3.3459E-12 -1.3257E-12 3.1465E-12 -1.0138E-12 1.4752E-12 3.3459E-12 4.2147E-11 # lat0 lon0 xBary yBary zBary JD0 -13.439179 34.519874 0.943426 -0.086741 -0.363571 2456888.891088 # Heliocentric elements and errors Epoch: 2456880.5000 = 2014/08/11 Mean Anomaly: 285.38208 +/- 0.038 Argument of Peri: 66.82772 +/- 0.022 Long of Asc Node: 61.43689 +/- 0.001 Inclination: 26.66434 +/- 0.001 Eccentricity: 0.20102495 +/- 0.0003 Semi-Major Axis: 45.75401136 +/- 0.0082 Time of Perihelion: 2480311.0701 +/- 10.3 Perihelion: 36.55631364 +/- 0.0156 Aphelion: 54.95170908 +/- 0.0172 Period (y) 309.4938 +/- 0.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 36.70377825 +/- 0.0011 Ecliptic Y 24.10330248 +/- 0.0008 Ecliptic Z -10.40099244 +/- 0.0003 Ecliptic XDOT -0.00150140 +/- 0.0000 Ecliptic YDOT 0.00178924 +/- 0.0000 Ecliptic ZDOT 0.00109179 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.12557115 +/- 0.0010 Geocenter to KBO 44.75311722 +/- 0.0014 # Hcoef: 7.16
The following table shows the complete astrometric record for 16SN56. 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 (16SN56) followed by the observatory code and reference code for the source of the astrometry.
2014 08 19.39031 02 26 57.039 +00 20 39.62 22.8i 16SN56 W84 C~52Zn 2014 10 01.36230 02 25 09.722 +00 04 55.96 23.7r 16SN56 W84 C~52Zn 2014 10 23.30026 02 23 37.549 -00 03 05.46 24.2g 16SN56 W84 C~52Zn 2016 09 10.36303 02 33 20.994 +01 50 36.29 23.9r 16SN56 W84 C~52Zn 2016 09 27.45294 02 32 28.23 +01 44 17.8 24.2g 16SN56 568 C~2eAI 2016 09 27.57248 02 32 27.80 +01 44 15.0 24.1g 16SN56 568 C~2eAI 2016 09 27.62188 02 32 27.61 +01 44 13.9 24.1g 16SN56 568 C~2eAI 2016 09 28.46202 02 32 24.58 +01 43 54.9 24.4g 16SN56 568 C~2eAI 2016 09 28.52267 02 32 24.35 +01 43 53.6 24.1g 16SN56 568 C~2eAI 2016 09 28.58192 02 32 24.13 +01 43 52.2 24.3g 16SN56 568 C~2eAI 2016 09 29.47382 02 32 20.86 +01 43 32.1 24.1g 16SN56 568 C~2eAI 2016 09 29.53424 02 32 20.63 +01 43 30.7 24.3g 16SN56 568 C~2eAI 2016 09 29.59403 02 32 20.40 +01 43 29.3 24.2g 16SN56 568 C~2eAI 2016 11 04.17111 02 29 47.209 +01 31 28.17 24.1r 16SN56 W84 C~52Zn 2016 11 04.17248 02 29 47.220 +01 31 28.27 23.2i 16SN56 W84 C~52Zn 2016 11 04.18347 02 29 47.174 +01 31 27.70 23.3r 16SN56 W84 C~52Zn 2016 11 04.18483 02 29 47.171 +01 31 27.83 23.2i 16SN56 W84 C~52Zn 2016 11 04.18620 02 29 47.166 +01 31 27.97 24.2g 16SN56 W84 C~52Zn 2016 11 04.18757 02 29 47.153 +01 31 27.78 23.7r 16SN56 W84 C~52Zn 2016 11 04.20412 02 29 47.073 +01 31 27.51 23.5r 16SN56 W84 C~52Zn 2016 11 04.20551 02 29 47.072 +01 31 27.65 22.9i 16SN56 W84 C~52Zn 2017 09 18.32531 02 36 34.621 +02 37 16.95 23.9g 16SN56 W84 C~52Zn 2017 10 13.24395 02 35 02.502 +02 28 13.50 23.9r 16SN56 W84 C~52Zn 2017 12 08.03433 02 30 59.307 +02 15 54.04 23.4i 16SN56 W84 C~52Zn 2017 12 24.07072 02 30 09.118 +02 16 34.79 23.4r 16SN56 W84 C~52Zn 2018 01 05.06399 02 29 43.669 +02 18 34.86 24.2g 16SN56 W84 C~52Zn 2018 09 11.34100 02 40 31.524 +03 29 34.78 23.8r 16SN56 W84 C~52Zn 2018 09 11.34236 02 40 31.510 +03 29 34.88 23.9i 16SN56 W84 C~52Zn 2018 09 11.34373 02 40 31.513 +03 29 34.55 23.7g 16SN56 W84 C~52Zn 2018 11 16.14400 02 36 07.502 +03 08 34.54 22.8i 16SN56 W84 C~52Zn
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 -0.01 0.00 0.14
2 0.1177 -1830.17 0.02 -363.93 -0.18
3 0.1777 -3294.41 0.04 -365.58 -0.01
4 2.0615 7211.66 0.04 3214.44 -0.12
5 2.1083 6339.21 -0.07 3115.41 0.15
6 2.1086 6332.20 0.03 3114.87 0.01
7 2.1088 6329.14 -0.08 3114.76 0.07
8 2.1111 6279.95 0.00 3111.67 0.05
9 2.1112 6276.26 -0.03 3111.57 0.14
10 2.1114 6272.68 -0.03 3111.32 0.07
11 2.1138 6219.72 0.03 3108.36 0.12
12 2.1140 6216.00 -0.00 3108.17 0.10
13 2.1142 6212.28 -0.07 3107.97 0.07
14 2.2116 3804.12 -0.26 3178.34 0.08
15 2.2116 3804.31 0.03 3178.38 0.11
16 2.2116 3803.47 -0.03 3178.06 -0.29
17 2.2116 3803.47 0.07 3178.20 -0.16
18 2.2116 3803.45 0.14 3178.36 -0.01
19 2.2116 3803.20 -0.01 3178.24 -0.14
20 2.2117 3801.98 -0.05 3178.38 -0.13
21 2.2117 3802.01 0.08 3178.52 -0.00
22 3.0826 10878.70 0.02 4916.06 -0.06
23 3.1509 9392.43 0.18 4852.64 0.04
24 3.3036 5700.34 0.04 5345.25 0.00
25 3.3475 5002.28 0.00 5630.10 -0.05
26 3.3804 4680.97 -0.00 5868.60 -0.09
27 4.0628 15277.99 0.07 6733.29 0.09
28 4.0628 15277.82 -0.04 6733.45 0.26
29 4.0628 15277.76 -0.04 6733.13 -0.05
30 4.2430 11110.23 -0.07 6827.81 -0.21
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.
16SN56 quality flag:2 Type: SCATNEAR SCATEXTD SCATEXTD axisobj 46.052 46.074 46.031 ecceobj 0.197 0.198 0.197 incobj 26.621 26.622 26.621 qmin 35.875 36.170 35.979 qmax 56.036 55.822 55.928 amean 45.760 45.782 45.724 amin 45.340 45.393 45.340 amax 46.277 46.226 46.185 emean 0.193 0.196 0.193 emin 0.174 0.185 0.175 emax 0.213 0.208 0.211 imean 25.609 25.569 25.583 imin 25.087 25.273 25.098 imax 26.120 25.897 26.011 excite_mean 0.474 0.474 0.473 fracstop 1.000 1.000 1.000 cjmean 2.840 2.840 2.840 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 185.7 175.6 182.2 kozaiamp 180.0 180.0 180.0