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: 15VG171 # Created Tue Apr 1 01:10:41 2025 # Orbit generated from Bernstein formalism # Fitting 27 observations of 27 # Arc: 2.27y # First observation: 2015/09/07 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000124 0.022024 -0.000002 0.002339 0.023313 0.000000 # Chi-squared of fit: 10.26 DOF: 48 RMS: 0.11 # Min/Max residuals: -0.25 0.30 # Exact a, adot, b, bdot, g, gdot: 1.485850E-05 2.186089E-02 1.193773E-06 2.322070E-03 2.325854E-02 4.969726E-04 # Covariance matrix: 2.7435E-13 4.6565E-14 -3.0749E-15 1.9043E-14 2.3628E-13 4.0684E-12 4.6565E-14 3.3920E-13 -8.5634E-15 4.3272E-14 2.6406E-13 9.1617E-12 -3.0749E-15 -8.5634E-15 1.1452E-13 -7.8467E-14 -7.9984E-15 -3.3276E-13 1.9043E-14 4.3272E-14 -7.8467E-14 1.0533E-13 4.4077E-14 1.6595E-12 2.3628E-13 2.6406E-13 -7.9984E-15 4.4077E-14 3.9438E-13 9.3704E-12 4.0684E-12 9.1617E-12 -3.3276E-13 1.6595E-12 9.3704E-12 3.5111E-10 # lat0 lon0 xBary yBary zBary JD0 -0.912725 51.896813 0.932968 -0.006057 -0.389557 2457273.133899 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 183.19608 +/- 2.446 Argument of Peri: 168.39549 +/- 2.446 Long of Asc Node: 59.14210 +/- 0.001 Inclination: 6.11427 +/- 0.001 Eccentricity: 0.01952051 +/- 0.0001 Semi-Major Axis: 42.56219745 +/- 0.0028 Time of Perihelion: 2507081.3404 +/- 689.0 Perihelion: 41.73136163 +/- 0.0044 Aphelion: 43.39303328 +/- 0.0044 Period (y) 277.6798 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.49844563 +/- 0.0007 Ecliptic Y 33.55910170 +/- 0.0009 Ecliptic Z -0.68482447 +/- 0.0000 Ecliptic XDOT -0.00198804 +/- 0.0000 Ecliptic YDOT 0.00163098 +/- 0.0000 Ecliptic ZDOT 0.00027243 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.39178267 +/- 0.0008 Geocenter to KBO 42.99496672 +/- 0.0012 # Hcoef: 8.89
The following table shows the complete astrometric record for 15VG171. 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 (15VG171) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.63311 03 18 54.234 +17 21 32.10 25.4w 15VG171 568 C~2nw8 2015 09 12.49674 03 18 46.575 +17 21 03.54 25.8w 15VG171 568 C~2nw8 2015 10 07.60373 03 17 36.748 +17 16 45.04 25.8w 15VG171 568 C~2nw8 2015 10 09.58362 03 17 29.378 +17 16 17.91 25.7w 15VG171 568 C~2nw8 2015 11 07.33788 03 15 22.202 +17 08 32.16 24.8r 15VG171 568 C~2nw9 2015 11 07.38006 03 15 21.996 +17 08 31.39 25.1r 15VG171 568 C~2nw9 2015 11 07.42224 03 15 21.785 +17 08 30.88 25.4r 15VG171 568 C~2nw9 2015 11 10.50536 03 15 06.802 +17 07 36.29 25.9w 15VG171 568 C~2nw9 2015 11 17.35218 03 14 33.470 +17 05 35.87 25.7w 15VG171 568 C~2nw9 2015 11 17.39878 03 14 33.244 +17 05 35.11 25.3w 15VG171 568 C~2nw9 2015 12 06.36096 03 13 04.294 +17 00 18.25 25.3w 15VG171 568 C~2nw9 2015 12 06.49848 03 13 03.663 +17 00 16.05 25.7w 15VG171 568 C~2nw9 2016 01 01.34872 03 11 27.889 +16 54 53.39 25.7w 15VG171 568 C~2nw9 2016 01 08.25624 03 11 10.131 +16 53 59.43 25.7w 15VG171 568 C~2nw9 2016 02 10.30807 03 10 44.531 +16 53 42.66 25.2w 15VG171 568 C~2nw9 2016 09 07.62568 03 23 49.213 +17 48 15.02 25.8w 15VG171 568 C~2nw9 2016 11 02.52573 03 20 40.980 +17 37 09.68 15VG171 568 C~2nw9 2016 11 04.40084 03 20 32.012 +17 36 38.08 15VG171 568 C~2nw9 2016 12 24.31334 03 16 47.196 +17 23 45.12 15VG171 568 C~2nw9 2016 12 25.28177 03 16 43.854 +17 23 33.99 24.1w 15VG171 568 C~2nw9 2016 12 28.42845 03 16 33.449 +17 23 00.75 24.9w 15VG171 568 C~2nw9 2017 01 02.41556 03 16 18.493 +17 22 14.13 25.6w 15VG171 568 C~2nw9 2017 01 26.32908 03 15 35.838 +17 20 24.75 25.4w 15VG171 568 C~2nw9 2017 09 15.58856 03 28 34.211 +18 13 52.82 26.1w 15VG171 568 C~2nw9 2017 09 22.57478 03 28 18.863 +18 13 01.28 26.1w 15VG171 568 C~2nw9 2017 12 13.39064 03 22 28.822 +17 53 17.60 25.1w 15VG171 568 C~2nw9 2017 12 13.42791 03 22 28.668 +17 53 17.02 25.2w 15VG171 568 C~2nw9
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 0.00 0.00 0.08
2 0.0133 -113.31 0.15 0.61 0.05
3 0.0821 -1146.10 -0.01 8.92 0.05
4 0.0875 -1255.09 0.16 10.04 0.09
5 0.1662 -3136.00 0.01 34.62 0.03
6 0.1663 -3139.05 0.02 34.65 -0.01
7 0.1664 -3142.10 0.03 34.95 0.23
8 0.1749 -3363.73 -0.25 38.48 -0.01
9 0.1936 -3856.58 -0.01 47.60 0.05
10 0.1937 -3859.91 0.07 47.71 0.08
11 0.2457 -5174.57 -0.02 78.21 -0.15
12 0.2460 -5183.89 -0.23 78.48 -0.15
13 0.3168 -6595.53 0.10 132.16 0.01
14 0.3357 -6855.83 -0.04 148.10 -0.10
15 0.4262 -7214.80 0.06 230.11 -0.11
16 1.0020 4487.53 -0.16 478.80 -0.05
17 1.1551 1716.37 -0.07 515.31 -0.03
18 1.1602 1584.33 -0.02 517.45 0.01
19 1.2969 -1722.44 0.10 598.63 0.09
20 1.2995 -1771.53 -0.08 600.32 -0.20
21 1.3081 -1924.01 -0.08 606.95 -0.13
22 1.3218 -2142.88 0.17 617.67 -0.00
23 1.3873 -2761.06 0.11 671.41 -0.16
24 2.0231 8811.82 0.04 961.71 0.30
25 2.0423 8586.79 0.08 965.26 -0.08
26 2.2663 3452.46 -0.09 1060.69 0.09
27 2.2664 3450.19 -0.01 1060.69 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.
15VG171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.957 42.966 42.948 ecceobj 0.011 0.012 0.011 incobj 6.093 6.093 6.093 qmin 41.174 41.264 41.146 qmax 44.279 44.243 44.311 amean 42.650 42.659 42.642 amin 42.329 42.338 42.311 amax 42.983 42.985 42.973 emean 0.014 0.014 0.015 emin 0.000 0.000 0.000 emax 0.031 0.030 0.032 imean 4.234 4.236 4.232 imin 3.321 3.329 3.317 imax 5.280 5.276 5.286 excite_mean 0.075 0.075 0.075 fracstop 1.000 1.000 1.000 cjmean 3.079 3.079 3.079 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 180.3 179.6 180.6 kozaiamp 180.0 180.0 180.0