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: 16SD58 # Created Sat Feb 22 02:11:00 2025 # Orbit generated from Bernstein formalism # Fitting 17 observations of 17 # Arc: 0.96y # First observation: 2015/10/14 # Last observation: 2016/09/28 Preliminary a, adot, b, bdot, g, gdot: -0.000002 0.029695 -0.000001 -0.003967 0.028003 0.000000 # Chi-squared of fit: 5.09 DOF: 28 RMS: 0.10 # Min/Max residuals: -0.21 0.25 # Exact a, adot, b, bdot, g, gdot: 1.558308E-05 2.980265E-02 -2.894486E-06 -3.977247E-03 2.805593E-02 1.922676E-03 # Covariance matrix: 3.7404E-13 9.9610E-12 2.9770E-14 -1.1247E-12 2.9530E-12 3.1237E-10 9.9610E-12 1.0617E-08 3.5621E-11 -1.1257E-09 2.2304E-09 3.1464E-07 2.9770E-14 3.5621E-11 2.4589E-13 -3.9278E-12 7.4689E-12 1.0554E-09 -1.1247E-12 -1.1257E-09 -3.9278E-12 1.1995E-10 -2.3668E-10 -3.3364E-08 2.9530E-12 2.2304E-09 7.4689E-12 -2.3668E-10 4.7147E-10 6.6146E-08 3.1237E-10 3.1464E-07 1.0554E-09 -3.3364E-08 6.6146E-08 9.3254E-06 # lat0 lon0 xBary yBary zBary JD0 -14.248298 27.997410 0.128867 -0.244217 -0.962447 2457310.020699 # Heliocentric elements and errors Epoch: 2457310.5000 = 2015/10/15 Mean Anomaly: 38.19175 +/- 36.716 Argument of Peri: 196.53784 +/- 47.492 Long of Asc Node: 147.24003 +/- 0.098 Inclination: 15.82778 +/- 0.014 Eccentricity: 0.08748762 +/- 0.0805 Semi-Major Axis: 39.16905818 +/- 0.7412 Time of Perihelion: 2447811.4511 +/- 9128.0 Perihelion: 35.74225042 +/- 3.2241 Aphelion: 42.59586595 +/- 3.2538 Period (y) 245.1449 +/- 6.96 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 31.43691909 +/- 0.0236 Ecliptic Y 16.56922721 +/- 0.0125 Ecliptic Z -8.77275488 +/- 0.0068 Ecliptic XDOT -0.00129064 +/- 0.0003 Ecliptic YDOT 0.00260190 +/- 0.0001 Ecliptic ZDOT -0.00042231 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 36.60301081 +/- 0.0211 Geocenter to KBO 35.64308347 +/- 0.0276 # Hcoef: 8.94
The following table shows the complete astrometric record for 16SD58. 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 (16SD58) followed by the observatory code and reference code for the source of the astrometry.
2015 10 14.51991 02 04 13.31 -02 34 09.9 25.2g 16SD58 T09 C~8eVS 2015 10 14.55055 02 04 13.13 -02 34 11.3 25.2g 16SD58 T09 C~8eVS 2015 10 14.57894 02 04 13.00 -02 34 12.3 25.4g 16SD58 T09 C~8eVS 2015 10 14.60271 02 04 12.87 -02 34 12.8 25.2g 16SD58 T09 C~8eVS 2015 11 06.46299 02 02 15.54 -02 45 15.7 24.3z 16SD58 T09 C~8eVS 2015 11 06.50498 02 02 15.33 -02 45 16.8 24.5z 16SD58 T09 C~8eVS 2015 11 06.52457 02 02 15.23 -02 45 17.3 24.0z 16SD58 T09 C~8eVS 2015 11 10.39623 02 01 55.81 -02 46 43.4 24.6i 16SD58 T09 C~8eVS 2015 11 10.40854 02 01 55.77 -02 46 43.8 24.2i 16SD58 T09 C~8eVS 2015 11 10.41958 02 01 55.70 -02 46 44.0 24.2i 16SD58 T09 C~8eVS 2015 11 10.44606 02 01 55.57 -02 46 44.6 24.0i 16SD58 T09 C~8eVS 2015 11 10.45724 02 01 55.52 -02 46 44.8 24.3i 16SD58 T09 C~8eVS 2015 11 10.46823 02 01 55.46 -02 46 45.0 24.0i 16SD58 T09 C~8eVS 2016 09 27.52266 02 12 11.20 -02 01 25.4 25.1g 16SD58 568 C~2eAJ 2016 09 27.58184 02 12 10.94 -02 01 27.6 24.7g 16SD58 568 C~2eAJ 2016 09 28.47127 02 12 07.09 -02 02 00.3 24.9g 16SD58 568 C~2eAJ 2016 09 28.59154 02 12 06.56 -02 02 04.6 25.0g 16SD58 568 C~2eAJ
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 0.25 0.00 0.13
2 0.0001 -3.02 -0.21 -0.36 -0.09
3 0.0002 -5.19 -0.01 -0.61 -0.21
4 0.0002 -7.19 -0.03 -0.40 0.11
5 0.0628 -1886.12 -0.04 -3.25 0.07
6 0.0629 -1889.45 0.00 -3.18 -0.07
7 0.0630 -1891.03 -0.00 -3.12 -0.12
8 0.0736 -2193.72 -0.13 18.44 0.19
9 0.0736 -2194.43 0.13 18.28 -0.06
10 0.0736 -2195.48 -0.06 18.46 0.04
11 0.0737 -2197.51 -0.02 18.58 -0.01
12 0.0738 -2198.28 0.09 18.66 -0.01
13 0.0738 -2199.20 0.03 18.78 0.04
14 0.9555 7398.68 -0.00 -684.77 -0.02
15 0.9557 7394.25 -0.00 -685.45 -0.04
16 0.9581 7328.62 -0.06 -695.69 -0.01
17 0.9584 7319.66 0.07 -696.91 0.06
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.
16SD58 quality flag:1 Type: 3:2E CENTAURR CLASSICAL axisobj 39.587 46.724 38.776 ecceobj 0.097 0.362 0.084 incobj 15.795 15.845 15.768 qmin 34.721 29.415 34.145 qmax 44.741 64.753 43.001 amean 39.459 46.618 38.476 amin 39.002 46.088 38.168 amax 39.943 47.343 38.830 emean 0.100 0.361 0.087 emin 0.072 0.354 0.067 emax 0.122 0.370 0.111 imean 14.876 14.644 12.029 imin 14.047 14.502 8.207 imax 15.725 14.741 15.161 excite_mean 0.276 0.441 0.226 fracstop 1.000 0.002 1.000 cjmean 2.964 2.896 2.986 libcent 0 180.8 -180.0 -180.0 libamp 0 116.0 -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 177.3 174.9 184.3 kozaiamp 180.0 2.5 180.0