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: 15VY166 # Created Fri Apr 19 01:17:53 2024 # Orbit generated from Bernstein formalism # Fitting 30 observations of 30 # Arc: 2.27y # First observation: 2015/09/07 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000088 0.023389 0.000000 0.000497 0.023874 0.000000 # Chi-squared of fit: 7.60 DOF: 54 RMS: 0.09 # Min/Max residuals: -0.24 0.20 # Exact a, adot, b, bdot, g, gdot: 1.516773E-05 2.324461E-02 4.740689E-07 4.945177E-04 2.381976E-02 2.096187E-03 # Covariance matrix: 2.2687E-13 -2.7222E-14 -3.3533E-16 1.9543E-15 1.5436E-13 2.0001E-12 -2.7222E-14 3.2600E-13 -1.9910E-15 8.1265E-15 1.9226E-13 8.1907E-12 -3.3533E-16 -1.9910E-15 1.2043E-13 -8.5385E-14 -1.4960E-15 -7.2656E-14 1.9543E-15 8.1265E-15 -8.5385E-14 1.0115E-13 6.7766E-15 2.9582E-13 1.5436E-13 1.9226E-13 -1.4960E-15 6.7766E-15 2.8414E-13 6.8649E-12 2.0001E-12 8.1907E-12 -7.2656E-14 2.9582E-13 6.8649E-12 2.9812E-10 # lat0 lon0 xBary yBary zBary JD0 -0.205660 52.523523 0.937202 -0.001213 -0.379309 2457273.129809 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 62.70377 +/- 0.117 Argument of Peri: 280.18667 +/- 0.191 Long of Asc Node: 60.78744 +/- 0.005 Inclination: 1.23078 +/- 0.001 Eccentricity: 0.07151160 +/- 0.0007 Semi-Major Axis: 43.61407488 +/- 0.0057 Time of Perihelion: 2438946.1084 +/- 34.1 Perihelion: 40.49516241 +/- 0.0319 Aphelion: 46.73298735 +/- 0.0321 Period (y) 288.0369 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 26.51362619 +/- 0.0006 Ecliptic Y 33.04734722 +/- 0.0007 Ecliptic Z -0.15066434 +/- 0.0000 Ecliptic XDOT -0.00197545 +/- 0.0000 Ecliptic YDOT 0.00181053 +/- 0.0000 Ecliptic ZDOT 0.00005603 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.36888282 +/- 0.0007 Geocenter to KBO 41.98195298 +/- 0.0009 # Hcoef: 9.04
The following table shows the complete astrometric record for 15VY166. 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 (15VY166) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62902 03 20 41.304 +18 12 10.21 25.9w 15VY166 568 C~2lVg 2015 10 07.53854 03 19 24.364 +18 07 21.63 25.8w 15VY166 568 C~2lVh 2015 10 07.59790 03 19 24.124 +18 07 20.91 26.0w 15VY166 568 C~2lVh 2015 10 09.57780 03 19 16.680 +18 06 52.85 25.6w 15VY166 568 C~2lVh 2015 11 07.33264 03 17 07.715 +17 58 46.78 24.7r 15VY166 568 C~2lVh 2015 11 07.37479 03 17 07.507 +17 58 45.93 25.3r 15VY166 568 C~2lVh 2015 11 07.41697 03 17 07.306 +17 58 44.98 25.4r 15VY166 568 C~2lVh 2015 11 10.49950 03 16 52.056 +17 57 47.62 25.4w 15VY166 568 C~2lVh 2015 11 17.34635 03 16 18.091 +17 55 38.99 25.4w 15VY166 568 C~2lVh 2015 12 06.35508 03 14 47.093 +17 49 53.79 25.2w 15VY166 568 C~2lVh 2016 01 01.34294 03 13 08.592 +17 43 41.76 25.5w 15VY166 568 C~2lVh 2016 01 07.40549 03 12 52.464 +17 42 41.87 26.1w 15VY166 568 C~2lVh 2016 01 08.25043 03 12 50.472 +17 42 34.28 25.3w 15VY166 568 C~2lVh 2016 02 05.28189 03 12 21.643 +17 40 57.00 25.1w 15VY166 568 C~2lVh 2016 09 29.48481 03 25 15.080 +18 30 50.79 25.0w 15VY166 568 C~2lVh 2016 10 05.48792 03 24 55.101 +18 29 38.66 25.7w 15VY166 568 C~2lVh 2016 10 07.49247 03 24 47.882 +18 29 12.28 26.2w 15VY166 568 C~2lVh 2016 10 07.58817 03 24 47.516 +18 29 11.04 25.9w 15VY166 568 C~2lVh 2016 10 09.49252 03 24 40.416 +18 28 45.18 25.3w 15VY166 568 C~2lVh 2016 10 09.56525 03 24 40.137 +18 28 44.07 25.5w 15VY166 568 C~2lVh 2016 11 02.50259 03 22 54.919 +18 22 21.07 25.5w 15VY166 568 C~2lVh 2016 11 04.47870 03 22 45.319 +18 21 45.83 25.4w 15VY166 568 C~2lVh 2016 12 25.28177 03 18 53.138 +18 07 33.51 25.7w 15VY166 568 C~2lVh 2016 12 28.42845 03 18 42.481 +18 06 54.60 25.3w 15VY166 568 C~2lVh 2016 12 28.44773 03 18 42.412 +18 06 54.28 25.6w 15VY166 568 C~2lVh 2017 01 27.27995 03 17 42.865 +18 03 22.72 25.4w 15VY166 568 C~2lVh 2017 09 15.56413 03 31 15.134 +18 54 05.14 25.8w 15VY166 568 C~2lVh 2017 09 20.61305 03 31 04.686 +18 53 29.05 25.5w 15VY166 568 C~2lVh 2017 12 13.39064 03 25 06.178 +18 32 23.31 25.1w 15VY166 568 C~2lVh 2017 12 13.42791 03 25 06.006 +18 32 22.60 25.6w 15VY166 568 C~2lVh
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 0.05 0.00 -0.03
2 0.0819 -1133.94 0.11 1.31 -0.08
3 0.0821 -1137.43 -0.07 1.50 0.08
4 0.0875 -1247.21 -0.12 1.60 -0.02
5 0.1662 -3149.88 -0.03 6.59 0.04
6 0.1663 -3152.96 -0.02 6.54 -0.04
7 0.1664 -3155.98 0.08 6.36 -0.24
8 0.1749 -3381.06 -0.07 7.46 0.03
9 0.1936 -3882.68 0.04 9.34 0.04
10 0.2457 -5227.45 -0.08 15.84 -0.10
11 0.3168 -6683.92 -0.04 27.73 0.05
12 0.3334 -6922.25 0.15 30.99 0.20
13 0.3357 -6951.75 0.09 31.22 0.01
14 0.4125 -7375.28 -0.11 46.72 0.19
15 1.0619 4054.71 0.12 103.29 -0.05
16 1.0783 3761.41 0.02 104.17 0.17
17 1.0838 3655.34 0.01 104.21 -0.03
18 1.0841 3649.99 -0.07 104.31 0.03
19 1.0893 3545.69 -0.02 104.46 -0.04
20 1.0895 3541.57 -0.00 104.37 -0.16
21 1.1550 1995.73 -0.06 108.91 0.05
22 1.1604 1854.58 -0.02 109.24 -0.08
23 1.2995 -1561.13 0.18 127.11 -0.02
24 1.3081 -1717.97 -0.03 128.60 0.00
25 1.3082 -1719.00 -0.13 128.54 -0.06
26 1.3899 -2594.01 0.05 143.23 -0.01
27 2.0231 9361.73 0.12 203.90 0.01
28 2.0369 9208.82 -0.08 204.55 0.13
29 2.2663 3955.07 0.05 224.42 0.02
30 2.2664 3952.52 -0.10 224.34 -0.08
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.
15VY166 quality flag:3 Type: 7:4EEE 7:4EEE 7:4EEE axisobj 44.065 44.085 44.045 ecceobj 0.080 0.081 0.078 incobj 1.228 1.228 1.228 qmin 39.885 39.853 39.871 qmax 47.835 47.861 47.847 amean 43.726 43.726 43.725 amin 43.339 43.357 43.347 amax 44.119 44.128 44.115 emean 0.074 0.074 0.072 emin 0.062 0.063 0.057 emax 0.085 0.085 0.085 imean 1.044 1.035 1.024 imin 0.166 0.158 0.099 imax 1.659 1.671 1.637 excite_mean 0.076 0.077 0.074 fracstop 1.000 1.000 1.000 cjmean 3.091 3.091 3.092 libcent 0 185.7 178.4 180.5 libamp 0 130.5 124.1 167.8 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 208.5 255.2 182.1 kozaiamp 180.0 179.9 179.9