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: 15VY168 # Created Mon Apr 28 01:10:41 2025 # Orbit generated from Bernstein formalism # Fitting 29 observations of 29 # Arc: 3.06y # First observation: 2014/11/23 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000051 0.023899 -0.000002 0.000170 0.024274 0.000000 # Chi-squared of fit: 13.05 DOF: 52 RMS: 0.12 # Min/Max residuals: -0.31 0.37 # Exact a, adot, b, bdot, g, gdot: 1.515405E-05 2.398826E-02 -1.090482E-07 1.709692E-04 2.443667E-02 -2.110345E-05 # Covariance matrix: 8.9949E-13 -9.6703E-13 6.5418E-15 -7.0256E-15 -4.4898E-13 -9.5298E-12 -9.6703E-13 1.1919E-12 -8.3660E-15 9.4072E-15 5.4145E-13 1.2705E-11 6.5418E-15 -8.3660E-15 2.5454E-13 -1.3138E-13 -4.7359E-15 -9.5031E-14 -7.0256E-15 9.4072E-15 -1.3138E-13 8.4900E-14 4.3850E-15 1.0830E-13 -4.4898E-13 5.4145E-13 -4.7359E-15 4.3850E-15 3.7936E-13 6.0391E-12 -9.5298E-12 1.2705E-11 -9.5031E-14 1.0830E-13 6.0391E-12 1.4608E-10 # lat0 lon0 xBary yBary zBary JD0 -1.746384 46.996899 -0.233213 -0.029094 -0.959627 2456984.910848 # Heliocentric elements and errors Epoch: 2456980.5000 = 2014/11/19 Mean Anomaly: 5.87158 +/- 1.252 Argument of Peri: 277.54253 +/- 1.311 Long of Asc Node: 123.61556 +/- 0.022 Inclination: 1.75640 +/- 0.000 Eccentricity: 0.02227287 +/- 0.0001 Semi-Major Axis: 42.83004006 +/- 0.0027 Time of Perihelion: 2455310.6636 +/- 356.1 Perihelion: 41.87609200 +/- 0.0047 Aphelion: 43.78398811 +/- 0.0047 Period (y) 280.3051 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.37858385 +/- 0.0007 Ecliptic Y 30.77577660 +/- 0.0008 Ecliptic Z -1.24715495 +/- 0.0000 Ecliptic XDOT -0.00197094 +/- 0.0000 Ecliptic YDOT 0.00182675 +/- 0.0000 Ecliptic ZDOT 0.00001932 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.88135435 +/- 0.0007 Geocenter to KBO 40.92211261 +/- 0.0010 # Hcoef: 8.63
The following table shows the complete astrometric record for 15VY168. 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 (15VY168) followed by the observatory code and reference code for the source of the astrometry.
2014 11 23.41007 03 00 10.679 +15 14 11.71 25.1r 15VY168 568 C~2nw0 2015 08 11.62323 03 10 46.979 +16 00 54.42 25.0w 15VY168 568 C~2nw0 2015 09 07.53281 03 10 39.627 +15 59 20.25 24.9w 15VY168 568 C~2nw0 2015 09 12.52956 03 10 30.937 +15 58 34.23 25.0w 15VY168 568 C~2nw0 2015 10 08.47583 03 09 13.656 +15 52 35.81 25.1w 15VY168 568 C~2nw0 2015 10 08.53403 03 09 13.421 +15 52 35.03 25.2w 15VY168 568 C~2nw0 2015 11 06.29151 03 07 03.695 +15 43 24.96 24.5r 15VY168 568 C~2nw0 2015 11 06.35485 03 07 03.381 +15 43 23.81 24.6r 15VY168 568 C~2nw0 2015 11 06.42547 03 07 03.046 +15 43 22.07 25.3r 15VY168 568 C~2nw0 2015 11 06.49480 03 07 02.692 +15 43 20.85 24.5r 15VY168 568 C~2nw0 2015 12 06.40765 03 04 39.657 +15 33 50.84 22.2w 15VY168 568 C~2nw0 2015 12 13.34220 03 04 10.469 +15 31 59.96 25.4w 15VY168 568 C~2nw0 2015 12 13.40075 03 04 10.238 +15 31 58.89 25.0w 15VY168 568 C~2nw0 2016 01 07.34177 03 02 51.267 +15 27 21.05 25.2w 15VY168 568 C~2nw0 2016 02 04.27190 03 02 26.806 +15 26 52.15 25.1w 15VY168 568 C~2nw0 2016 09 07.55050 03 16 03.947 +16 21 24.45 15VY168 568 C~2nw0 2016 10 10.42589 03 14 31.423 +16 14 22.26 25.5w 15VY168 568 C~2nw0 2016 10 10.48430 03 14 31.191 +16 14 21.33 25.6w 15VY168 568 C~2nw0 2016 10 10.50790 03 14 31.082 +16 14 21.09 25.1w 15VY168 568 C~2nw0 2016 10 27.51417 03 13 16.438 +16 09 10.67 25.2w 15VY168 568 C~2nw0 2016 11 03.53920 03 12 42.621 +16 06 53.66 25.9w 15VY168 568 C~2nw0 2016 12 29.36878 03 08 37.606 +15 51 28.65 25.4w 15VY168 568 C~2nw0 2017 01 01.26608 03 08 29.310 +15 51 01.16 25.2w 15VY168 568 C~2nw0 2017 01 02.37586 03 08 26.253 +15 50 51.46 25.4w 15VY168 568 C~2nw0 2017 01 26.27054 03 07 48.084 +15 49 16.37 25.5w 15VY168 568 C~2nw0 2017 09 15.60092 03 21 16.832 +16 41 54.88 25.5w 15VY168 568 C~2nw0 2017 09 22.58685 03 21 00.450 +16 40 38.75 23.6w 15VY168 568 C~2nw0 2017 12 16.38250 03 14 51.482 +16 16 37.87 25.1w 15VY168 568 C~2nw0 2017 12 16.38715 03 14 51.464 +16 16 37.79 25.4w 15VY168 568 C~2nw0
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 0.7152 9614.96 0.25 164.58 0.16
3 0.7888 9487.23 -0.05 102.36 0.11
4 0.8025 9353.88 -0.08 91.80 0.02
5 0.8736 8181.66 -0.20 47.93 0.00
6 0.8737 8178.18 -0.20 48.10 0.22
7 0.9524 6224.38 -0.03 28.53 -0.04
8 0.9526 6219.70 0.02 28.67 0.07
9 0.9528 6214.57 0.17 28.31 -0.31
10 0.9530 6209.32 0.12 28.54 -0.11
11 1.0349 4064.82 0.09 48.34 0.09
12 1.0539 3628.66 -0.15 58.39 0.11
13 1.0540 3625.15 -0.07 58.29 -0.11
14 1.1223 2451.11 -0.09 108.11 -0.03
15 1.1988 2103.35 -0.02 178.83 -0.21
16 1.7909 14359.86 -0.07 135.18 -0.06
17 1.8809 12957.45 0.03 79.40 -0.14
18 1.8811 12953.97 0.12 79.39 -0.11
19 1.8812 12952.38 -0.02 79.57 0.10
20 1.9277 11829.29 0.03 65.82 0.05
21 1.9470 11321.53 -0.01 63.69 -0.10
22 2.0998 7662.04 0.01 124.48 0.08
23 2.1078 7539.20 0.37 130.56 -0.08
24 2.1108 7494.05 -0.14 133.22 0.10
25 2.1762 6937.48 -0.06 191.71 0.00
26 2.8123 19055.18 -0.05 154.12 0.11
27 2.8314 18806.06 0.04 140.96 -0.10
28 3.0636 13273.16 -0.04 133.85 0.08
29 3.0636 13272.89 -0.03 133.84 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.
15VY168 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.162 43.171 43.153 ecceobj 0.030 0.030 0.030 incobj 1.757 1.757 1.757 qmin 40.401 40.418 40.408 qmax 45.450 45.457 45.434 amean 42.835 42.844 42.827 amin 42.504 42.511 42.495 amax 43.171 43.185 43.168 emean 0.035 0.035 0.035 emin 0.013 0.013 0.013 emax 0.053 0.053 0.053 imean 1.742 1.740 1.744 imin 0.473 0.472 0.472 imax 2.550 2.545 2.556 excite_mean 0.047 0.047 0.046 fracstop 1.000 1.000 1.000 cjmean 3.085 3.085 3.085 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 186.0 186.1 185.5 kozaiamp 180.0 179.9 180.0