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: 15VC170 # Created Tue Apr 1 01:10:41 2025 # Orbit generated from Bernstein formalism # Fitting 39 observations of 39 # Arc: 2.32y # First observation: 2015/08/20 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000112 0.023474 -0.000001 0.000559 0.023882 0.000000 # Chi-squared of fit: 4.98 DOF: 72 RMS: 0.06 # Min/Max residuals: -0.21 0.15 # Exact a, adot, b, bdot, g, gdot: 1.504760E-05 2.314409E-02 6.289231E-07 5.518007E-04 2.367352E-02 1.571277E-03 # Covariance matrix: 1.9977E-13 -2.8933E-14 1.8032E-16 1.8280E-15 1.2933E-13 1.9788E-12 -2.8933E-14 2.3318E-13 -9.4166E-16 5.4003E-15 1.3553E-13 5.6906E-12 1.8032E-16 -9.4166E-16 1.0171E-13 -7.8642E-14 -4.0211E-16 -3.9203E-14 1.8280E-15 5.4003E-15 -7.8642E-14 9.5193E-14 5.1824E-15 2.2245E-13 1.2933E-13 1.3553E-13 -4.0211E-16 5.1824E-15 2.1393E-13 5.5139E-12 1.9788E-12 5.6906E-12 -3.9203E-14 2.2245E-13 5.5139E-12 2.3437E-10 # lat0 lon0 xBary yBary zBary JD0 -0.546832 52.601963 1.011381 -0.000636 -0.080646 2457255.076589 # Heliocentric elements and errors Epoch: 2457250.5000 = 2015/08/16 Mean Anomaly: 53.57443 +/- 0.318 Argument of Peri: 279.62335 +/- 0.389 Long of Asc Node: 73.20920 +/- 0.011 Inclination: 1.45796 +/- 0.001 Eccentricity: 0.05025324 +/- 0.0006 Semi-Major Axis: 43.55611169 +/- 0.0037 Time of Perihelion: 2441625.2454 +/- 92.8 Perihelion: 41.36727595 +/- 0.0258 Aphelion: 45.74494743 +/- 0.0259 Period (y) 287.4629 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 26.50243767 +/- 0.0005 Ecliptic Y 33.00612926 +/- 0.0006 Ecliptic Z -0.40309755 +/- 0.0000 Ecliptic XDOT -0.00201766 +/- 0.0000 Ecliptic YDOT 0.00176411 +/- 0.0000 Ecliptic ZDOT 0.00006213 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.33138621 +/- 0.0006 Geocenter to KBO 42.24129424 +/- 0.0008 # Hcoef: 7.28
The following table shows the complete astrometric record for 15VC170. 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 (15VC170) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.57580 03 21 22.354 +17 53 34.19 23.8w 15VC170 568 C~2nw4 2015 09 07.61675 03 21 14.064 +17 52 54.75 23.7w 15VC170 568 C~2nw4 2015 10 07.52101 03 19 57.581 +17 47 56.86 23.7w 15VC170 568 C~2nw4 2015 10 07.58040 03 19 57.356 +17 47 56.04 23.3w 15VC170 568 C~2nw4 2015 10 09.56029 03 19 49.941 +17 47 27.65 23.8w 15VC170 568 C~2nw4 2015 11 06.33360 03 17 46.058 +17 39 36.85 23.6r 15VC170 568 C~2nw4 2015 11 06.39716 03 17 45.754 +17 39 35.76 23.4r 15VC170 568 C~2nw4 2015 11 06.40423 03 17 45.713 +17 39 35.57 23.6r 15VC170 568 C~2nw4 2015 11 06.47375 03 17 45.363 +17 39 34.31 23.4r 15VC170 568 C~2nw4 2015 11 17.47136 03 16 50.946 +17 36 08.72 23.7w 15VC170 568 C~2nw4 2015 11 17.55969 03 16 50.501 +17 36 07.05 23.6w 15VC170 568 C~2nw4 2015 12 06.33759 03 15 20.676 +17 30 29.83 23.8w 15VC170 568 C~2nw4 2015 12 06.47504 03 15 20.048 +17 30 27.59 23.7w 15VC170 568 C~2nw4 2015 12 31.35875 03 13 44.853 +17 24 36.79 23.5w 15VC170 568 C~2nw4 2016 01 07.38812 03 13 25.780 +17 23 29.13 23.9w 15VC170 568 C~2nw4 2016 01 07.42286 03 13 25.714 +17 23 28.87 23.9w 15VC170 568 C~2nw4 2016 01 08.24465 03 13 23.768 +17 23 21.93 23.8w 15VC170 568 C~2nw4 2016 02 04.37827 03 12 54.333 +17 21 56.11 23.9w 15VC170 568 C~2nw4 2016 02 11.24103 03 12 58.303 +17 22 19.38 23.9w 15VC170 568 C~2nw4 2016 09 07.59099 03 26 36.664 +18 14 43.13 23.9w 15VC170 568 C~2nw4 2016 09 27.52301 03 25 54.366 +18 12 02.62 23.9w 15VC170 568 C~2nw4 2016 10 05.50531 03 25 28.466 +18 10 26.53 23.5w 15VC170 568 C~2nw4 2016 10 07.50982 03 25 21.276 +18 09 59.74 23.8w 15VC170 568 C~2nw4 2016 10 07.60551 03 25 20.917 +18 09 58.40 23.7w 15VC170 568 C~2nw4 2016 10 09.51019 03 25 13.831 +18 09 32.25 24.0w 15VC170 568 C~2nw4 2016 10 09.58259 03 25 13.551 +18 09 31.18 23.2w 15VC170 568 C~2nw4 2016 11 02.49681 03 23 28.624 +18 03 05.26 23.6w 15VC170 568 C~2nw4 2016 11 02.50259 03 23 28.599 +18 03 05.18 23.6w 15VC170 568 C~2nw4 2016 11 04.47292 03 23 19.033 +18 02 30.07 23.7w 15VC170 568 C~2nw4 2016 11 04.47870 03 23 19.002 +18 02 30.01 23.6w 15VC170 568 C~2nw4 2016 12 25.28177 03 19 26.683 +17 48 27.41 23.8w 15VC170 568 C~2nw4 2016 12 28.42845 03 19 16.025 +17 47 49.57 23.8w 15VC170 568 C~2nw4 2016 12 28.44773 03 19 15.953 +17 47 49.38 23.9w 15VC170 568 C~2nw4 2017 01 26.34230 03 18 16.697 +17 44 32.67 23.9w 15VC170 568 C~2nw4 2017 01 27.27995 03 18 16.072 +17 44 31.31 15VC170 568 C~2nw4 2017 01 27.29772 03 18 16.058 +17 44 31.27 24.7w 15VC170 568 C~2nw4 2017 09 16.60340 03 31 47.018 +18 35 06.96 15VC170 568 C~2nw4 2017 09 23.54254 03 31 31.601 +18 34 10.82 15VC170 568 C~2nw4 2017 12 13.42791 03 25 40.192 +18 13 26.24 23.8w 15VC170 568 C~2nw4
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 0.08 0.00 -0.05
2 0.0494 -124.48 -0.07 -8.09 0.07
3 0.1313 -1256.43 -0.01 -17.81 -0.04
4 0.1314 -1259.74 -0.02 -17.78 -0.02
5 0.1369 -1369.39 0.01 -18.13 -0.03
6 0.2129 -3201.19 -0.09 -17.87 -0.00
7 0.2131 -3205.67 0.10 -17.80 0.03
8 0.2131 -3206.29 0.01 -17.83 -0.01
9 0.2133 -3211.45 -0.03 -17.76 0.03
10 0.2434 -4016.31 -0.00 -14.77 -0.07
11 0.2436 -4022.89 -0.02 -14.73 -0.07
12 0.2950 -5351.70 0.07 -5.46 -0.03
13 0.2954 -5360.96 0.14 -5.27 0.05
14 0.3635 -6768.64 0.01 13.97 -0.02
15 0.3828 -7050.14 -0.17 20.73 0.10
16 0.3829 -7051.12 0.12 20.73 0.07
17 0.3851 -7079.85 0.04 21.39 -0.04
18 0.4594 -7509.46 -0.21 50.04 0.08
19 0.4782 -7448.41 0.02 57.45 -0.02
20 1.0514 4657.87 0.02 105.97 -0.02
21 1.1059 4033.97 -0.02 99.58 -0.03
22 1.1278 3652.44 -0.17 98.11 0.15
23 1.1333 3546.50 -0.03 97.64 -0.01
24 1.1336 3541.21 -0.04 97.61 -0.04
25 1.1388 3436.85 0.00 97.41 0.04
26 1.1390 3432.72 -0.01 97.36 -0.01
27 1.2044 1887.50 0.01 97.66 -0.02
28 1.2045 1887.14 0.06 97.67 -0.01
29 1.2098 1746.25 0.07 97.96 -0.06
30 1.2099 1745.81 0.05 98.01 -0.01
31 1.3490 -1675.19 -0.06 124.71 0.13
32 1.3576 -1832.03 0.05 127.17 -0.07
33 1.3576 -1833.08 -0.05 127.25 -0.00
34 1.4367 -2701.73 0.02 154.89 -0.03
35 1.4393 -2710.71 0.06 155.88 -0.01
36 1.4393 -2710.92 0.03 155.90 -0.01
37 2.0754 9245.23 -0.01 217.29 -0.01
38 2.0944 9018.52 0.05 215.45 0.01
39 2.3158 3859.00 -0.05 230.72 -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.
15VC170 quality flag:2 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 43.993 44.007 43.979 ecceobj 0.059 0.061 0.058 incobj 1.456 1.455 1.456 qmin 40.128 37.584 40.282 qmax 47.389 50.370 47.254 amean 43.649 43.690 43.635 amin 43.307 43.286 43.293 amax 44.011 44.207 43.996 emean 0.060 0.094 0.057 emin 0.036 0.047 0.036 emax 0.077 0.140 0.074 imean 0.822 1.105 0.823 imin 0.392 0.497 0.360 imax 1.241 1.599 1.239 excite_mean 0.062 0.096 0.059 fracstop 1.000 1.000 1.000 cjmean 3.093 3.086 3.093 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 197.3 197.7 194.2 kozaiamp 180.0 180.0 180.0