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: 15VF170 # Created Tue Apr 1 01:10:41 2025 # Orbit generated from Bernstein formalism # Fitting 23 observations of 23 # Arc: 2.09y # First observation: 2015/08/20 # Last observation: 2017/09/23 Preliminary a, adot, b, bdot, g, gdot: -0.000106 0.022278 -0.000001 0.000849 0.023365 0.000000 # Chi-squared of fit: 5.33 DOF: 40 RMS: 0.09 # Min/Max residuals: -0.17 0.30 # Exact a, adot, b, bdot, g, gdot: 1.487305E-05 2.192350E-02 2.545982E-07 8.375215E-04 2.312280E-02 1.407177E-04 # Covariance matrix: 3.2429E-13 -7.0724E-14 4.3390E-16 3.6985E-15 2.2044E-13 2.6090E-12 -7.0724E-14 4.5549E-13 -2.9414E-15 1.5718E-14 2.1691E-13 1.0637E-11 4.3390E-16 -2.9414E-15 1.4780E-13 -1.1675E-13 -1.1680E-15 -1.0026E-13 3.6985E-15 1.5718E-14 -1.1675E-13 1.5930E-13 1.2880E-14 5.7009E-13 2.2044E-13 2.1691E-13 -1.1680E-15 1.2880E-14 3.6466E-13 8.8336E-12 2.6090E-12 1.0637E-11 -1.0026E-13 5.7009E-13 8.8336E-12 3.8640E-10 # lat0 lon0 xBary yBary zBary JD0 -0.580902 53.164459 1.012124 -0.000583 -0.070713 2457255.076589 # Heliocentric elements and errors Epoch: 2457250.5000 = 2015/08/16 Mean Anomaly: 235.88254 +/- 1.217 Argument of Peri: 111.38109 +/- 1.214 Long of Asc Node: 66.74049 +/- 0.006 Inclination: 2.25219 +/- 0.001 Eccentricity: 0.02358808 +/- 0.0007 Semi-Major Axis: 42.74598820 +/- 0.0036 Time of Perihelion: 2492444.7620 +/- 345.0 Perihelion: 41.73769250 +/- 0.0315 Aphelion: 43.75428391 +/- 0.0315 Period (y) 279.4803 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 26.77473616 +/- 0.0007 Ecliptic Y 34.06133809 +/- 0.0009 Ecliptic Z -0.43842988 +/- 0.0000 Ecliptic XDOT -0.00206901 +/- 0.0000 Ecliptic YDOT 0.00156403 +/- 0.0000 Ecliptic ZDOT 0.00009905 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.32728320 +/- 0.0008 Geocenter to KBO 43.24735898 +/- 0.0011 # Hcoef: 8.03
The following table shows the complete astrometric record for 15VF170. 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 (15VF170) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.57580 03 23 41.829 +18 00 06.41 24.5w 15VF170 568 C~2nw5 2015 09 07.61675 03 23 34.166 +17 59 31.99 24.5w 15VF170 568 C~2nw5 2015 10 09.56029 03 22 12.339 +17 54 22.44 24.5w 15VF170 568 C~2nw5 2015 11 06.33360 03 20 10.930 +17 46 51.58 24.4r 15VF170 568 C~2nw5 2015 11 06.39716 03 20 10.618 +17 46 50.63 24.1r 15VF170 568 C~2nw5 2015 11 06.40423 03 20 10.577 +17 46 50.26 24.4r 15VF170 568 C~2nw5 2015 11 06.47375 03 20 10.238 +17 46 49.18 24.6r 15VF170 568 C~2nw5 2015 11 07.49015 03 20 05.336 +17 46 30.94 24.4w 15VF170 568 C~2nw5 2015 12 06.33759 03 17 47.528 +17 38 04.90 24.4w 15VF170 568 C~2nw5 2015 12 06.47504 03 17 46.926 +17 38 02.50 24.8w 15VF170 568 C~2nw5 2015 12 31.35875 03 16 12.105 +17 32 22.76 24.6w 15VF170 568 C~2nw5 2016 01 08.24465 03 15 50.834 +17 31 09.83 24.8w 15VF170 568 C~2nw5 2016 02 11.24103 03 15 22.964 +17 30 05.72 24.7w 15VF170 568 C~2nw5 2016 09 27.52301 03 27 58.298 +18 18 31.82 24.5w 15VF170 568 C~2nw5 2016 10 05.50531 03 27 32.983 +18 17 00.00 24.3w 15VF170 568 C~2nw5 2016 10 07.50982 03 27 25.950 +18 16 34.66 24.8w 15VF170 568 C~2nw5 2016 10 07.60551 03 27 25.597 +18 16 33.33 25.1w 15VF170 568 C~2nw5 2016 11 02.50259 03 25 35.401 +18 09 57.36 24.5w 15VF170 568 C~2nw5 2016 11 04.47870 03 25 25.958 +18 09 23.55 24.5w 15VF170 568 C~2nw5 2016 12 28.44773 03 21 25.418 +17 55 12.60 24.9w 15VF170 568 C~2nw5 2017 01 27.29772 03 20 24.471 +17 51 58.41 24.5w 15VF170 568 C~2nw5 2017 09 16.60340 03 33 33.672 +18 41 19.70 24.8w 15VF170 568 C~2nw5 2017 09 23.54254 03 33 18.606 +18 40 26.67 24.5w 15VF170 568 C~2nw5
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 0.07
2 0.0494 -114.46 -0.04 -5.90 0.01
3 0.1369 -1322.47 0.01 -11.45 0.05
4 0.2129 -3113.88 0.01 -7.20 0.00
5 0.2131 -3118.43 0.03 -6.98 0.17
6 0.2131 -3119.09 -0.12 -7.19 -0.04
7 0.2133 -3124.05 -0.05 -7.00 0.10
8 0.2161 -3196.43 -0.00 -6.75 -0.03
9 0.2950 -5230.41 0.02 10.09 0.08
10 0.2954 -5239.35 0.30 10.00 -0.15
11 0.3635 -6638.07 -0.05 33.60 -0.11
12 0.3851 -6951.15 -0.16 42.49 -0.06
13 0.4782 -7353.22 0.02 84.75 0.03
14 1.1059 3815.87 0.07 164.55 0.02
15 1.1278 3443.72 -0.17 164.01 -0.11
16 1.1333 3340.36 0.05 164.06 -0.05
17 1.1336 3335.16 -0.00 164.01 -0.13
18 1.2045 1715.70 0.10 168.20 -0.01
19 1.2099 1576.92 0.02 168.87 0.01
20 1.3576 -1957.68 -0.06 206.65 -0.03
21 1.4393 -2848.57 0.02 240.16 0.02
22 2.0754 8780.51 0.03 340.61 0.06
23 2.0944 8559.57 -0.04 340.00 0.10
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.
15VF170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.132 43.143 43.121 ecceobj 0.015 0.015 0.015 incobj 2.247 2.246 2.247 qmin 40.829 40.869 40.795 qmax 44.991 44.988 44.985 amean 42.824 42.835 42.813 amin 42.499 42.503 42.489 amax 43.153 43.168 43.143 emean 0.022 0.022 0.023 emin 0.002 0.001 0.003 emax 0.043 0.043 0.043 imean 1.011 1.006 1.016 imin 0.358 0.350 0.366 imax 1.548 1.545 1.550 excite_mean 0.029 0.029 0.030 fracstop 1.000 1.000 1.000 cjmean 3.087 3.087 3.086 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 175.4 175.4 174.8 kozaiamp 180.0 180.0 180.0