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: 15VO170 # Created Tue Apr 1 01:10:41 2025 # Orbit generated from Bernstein formalism # Fitting 31 observations of 31 # Arc: 2.03y # First observation: 2015/09/07 # Last observation: 2017/09/16 Preliminary a, adot, b, bdot, g, gdot: -0.000093 0.020694 -0.000004 0.000568 0.022347 0.000000 # Chi-squared of fit: 6.62 DOF: 56 RMS: 0.08 # Min/Max residuals: -0.29 0.18 # Exact a, adot, b, bdot, g, gdot: 1.502271E-05 2.054261E-02 5.977694E-09 5.638239E-04 2.232055E-02 9.738785E-04 # Covariance matrix: 2.2851E-13 -5.2322E-14 2.0797E-15 1.7678E-15 1.6786E-13 3.4689E-12 -5.2322E-14 3.1951E-13 8.7663E-16 5.1816E-15 1.6387E-13 9.1983E-12 2.0797E-15 8.7663E-16 1.2029E-13 -1.0789E-13 3.1126E-15 5.5932E-14 1.7678E-15 5.1816E-15 -1.0789E-13 1.5852E-13 5.2440E-15 2.9567E-13 1.6786E-13 1.6387E-13 3.1126E-15 5.2440E-15 3.0577E-13 9.7226E-12 3.4689E-12 9.1983E-12 5.5932E-14 2.9567E-13 9.7226E-12 5.2597E-10 # lat0 lon0 xBary yBary zBary JD0 -2.503442 52.434600 0.936640 -0.016480 -0.380344 2457273.125689 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 139.22984 +/- 1.305 Argument of Peri: 159.38575 +/- 1.301 Long of Asc Node: 109.83004 +/- 0.019 Inclination: 2.90774 +/- 0.001 Eccentricity: 0.03827667 +/- 0.0006 Semi-Major Axis: 43.89034170 +/- 0.0041 Time of Perihelion: 2416195.1097 +/- 384.9 Perihelion: 42.21036539 +/- 0.0286 Aphelion: 45.57031802 +/- 0.0287 Period (y) 290.7781 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.25850030 +/- 0.0007 Ecliptic Y 35.20908805 +/- 0.0009 Ecliptic Z -1.95690674 +/- 0.0001 Ecliptic XDOT -0.00192458 +/- 0.0000 Ecliptic YDOT 0.00162679 +/- 0.0000 Ecliptic ZDOT 0.00006393 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.18907174 +/- 0.0008 Geocenter to KBO 44.80176713 +/- 0.0011 # Hcoef: 8.02
The following table shows the complete astrometric record for 15VO170. 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 (15VO170) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62490 03 22 45.952 +15 57 27.21 24.9w 15VO170 568 C~2nw6 2015 09 12.48855 03 22 39.039 +15 56 47.09 25.0w 15VO170 568 C~2nw6 2015 10 07.53269 03 21 34.398 +15 51 43.06 24.2w 15VO170 568 C~2nw6 2015 10 07.59208 03 21 34.186 +15 51 41.95 24.8w 15VO170 568 C~2nw6 2015 10 09.57195 03 21 27.256 +15 51 12.28 25.0w 15VO170 568 C~2nw6 2015 11 06.34408 03 19 31.492 +15 43 23.28 24.4r 15VO170 568 C~2nw6 2015 11 06.41470 03 19 31.157 +15 43 22.01 24.9r 15VO170 568 C~2nw6 2015 11 06.48426 03 19 30.827 +15 43 20.90 24.1r 15VO170 568 C~2nw6 2015 11 07.50182 03 19 26.149 +15 43 02.72 24.7w 15VO170 568 C~2nw6 2015 11 17.48361 03 18 39.871 +15 40 07.29 24.3w 15VO170 568 C~2nw6 2015 11 17.57138 03 18 39.439 +15 40 05.53 24.7w 15VO170 568 C~2nw6 2015 12 06.34926 03 17 15.081 +15 35 01.60 24.8w 15VO170 568 C~2nw6 2015 12 31.37031 03 15 44.360 +15 30 09.38 24.7w 15VO170 568 C~2nw6 2016 01 07.39971 03 15 26.090 +15 29 19.95 15VO170 568 C~2nw6 2016 02 05.29926 03 14 54.518 +15 29 02.32 24.6w 15VO170 568 C~2nw6 2016 02 11.25262 03 14 57.399 +15 29 36.61 24.9w 15VO170 568 C~2nw6 2016 09 07.58521 03 27 27.233 +16 16 48.95 24.9w 15VO170 568 C~2nw6 2016 09 27.51883 03 26 47.390 +16 13 30.73 24.8w 15VO170 568 C~2nw6 2016 09 29.49637 03 26 41.763 +16 13 05.69 24.8w 15VO170 568 C~2nw6 2016 10 07.50403 03 26 16.374 +16 11 16.08 24.7w 15VO170 568 C~2nw6 2016 10 07.59973 03 26 16.033 +16 11 14.67 25.2w 15VO170 568 C~2nw6 2016 10 09.50422 03 26 09.397 +16 10 46.77 24.9w 15VO170 568 C~2nw6 2016 10 09.57681 03 26 09.141 +16 10 45.71 24.9w 15VO170 568 C~2nw6 2016 11 02.48525 03 24 31.005 +16 04 15.92 24.9w 15VO170 568 C~2nw6 2016 11 02.49102 03 24 30.973 +16 04 15.88 24.8w 15VO170 568 C~2nw6 2016 11 04.46126 03 24 22.024 +16 03 41.85 24.8w 15VO170 568 C~2nw6 2016 11 04.46713 03 24 21.997 +16 03 41.72 24.9w 15VO170 568 C~2nw6 2016 12 28.44224 03 20 33.623 +15 50 37.04 24.8w 15VO170 568 C~2nw6 2016 12 28.45409 03 20 33.585 +15 50 36.86 24.9w 15VO170 568 C~2nw6 2017 01 27.30860 03 19 35.800 +15 48 37.68 24.7w 15VO170 568 C~2nw6 2017 09 16.59057 03 31 56.812 +16 34 40.43 24.7w 15VO170 568 C~2nw6
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 -0.10 0.00 0.08
2 0.0133 -106.60 0.09 -13.67 0.03
3 0.0819 -1085.69 0.06 -71.90 0.07
4 0.0820 -1088.93 -0.03 -72.19 -0.13
5 0.0875 -1193.18 -0.00 -75.53 0.07
6 0.1635 -2928.67 0.15 -103.19 0.05
7 0.1637 -2933.67 0.06 -103.18 0.04
8 0.1639 -2938.56 0.02 -103.03 0.18
9 0.1667 -3008.52 -0.03 -103.31 0.05
10 0.1940 -3699.64 0.13 -101.46 -0.02
11 0.1942 -3706.12 -0.20 -101.55 -0.16
12 0.2457 -4962.45 -0.02 -81.11 -0.04
13 0.3142 -6305.43 -0.04 -23.21 0.03
14 0.3334 -6573.54 -0.05 -2.15 -0.29
15 0.4125 -7019.20 -0.03 99.97 -0.02
16 0.4288 -6969.99 0.02 122.20 -0.04
17 1.0019 4215.59 0.06 113.74 -0.03
18 1.0565 3610.42 0.11 63.45 -0.07
19 1.0619 3525.67 -0.19 59.25 0.01
20 1.0839 3144.11 -0.03 43.71 0.05
21 1.0841 3139.00 -0.11 43.57 0.04
22 1.0893 3039.45 -0.12 40.26 0.04
23 1.0895 3035.61 -0.01 40.15 0.04
24 1.1550 1568.77 0.08 15.11 -0.01
25 1.1550 1568.32 0.02 15.18 0.07
26 1.1604 1434.91 0.04 14.52 0.02
27 1.1604 1434.50 0.04 14.49 -0.01
28 1.3082 -1950.67 0.02 87.18 0.01
29 1.3082 -1951.24 -0.01 87.14 -0.05
30 1.3900 -2788.06 0.03 184.85 -0.00
31 2.0259 8242.18 0.03 206.34 -0.00
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.
15VO170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.307 44.322 44.292 ecceobj 0.036 0.037 0.034 incobj 2.909 2.909 2.909 qmin 41.728 41.654 41.745 qmax 46.464 46.556 46.379 amean 43.988 44.003 43.974 amin 43.653 43.664 43.633 amax 44.339 44.353 44.319 emean 0.033 0.034 0.031 emin 0.017 0.018 0.015 emax 0.048 0.050 0.047 imean 1.447 1.447 1.447 imin 0.805 0.812 0.799 imax 2.060 2.057 2.062 excite_mean 0.042 0.044 0.041 fracstop 1.000 1.000 1.000 cjmean 3.099 3.099 3.099 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 167.2 163.6 170.9 kozaiamp 180.0 180.0 180.0