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: 15VY227 # Created Mon Apr 28 01:10:45 2025 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 64.85d # First observation: 2015/11/08 # Last observation: 2016/01/12 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.024808 -0.000001 0.003062 0.024325 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 6.95 DOF: 27 RMS: 0.12 # Min/Max residuals: -0.22 0.27 # Exact a, adot, b, bdot, g, gdot: 1.543648E-05 2.379273E-02 5.800712E-07 2.785803E-03 2.361863E-02 -5.712634E-04 # Covariance matrix: 2.5044E-13 1.3127E-11 5.0058E-15 4.9690E-12 8.2538E-12 1.1258E-09 1.3127E-11 2.9052E-08 9.9682E-12 1.0179E-08 1.6014E-08 2.0632E-06 5.0058E-15 9.9682E-12 2.4644E-13 2.0718E-12 5.5234E-12 7.1851E-10 4.9690E-12 1.0179E-08 2.0718E-12 3.6900E-09 5.4076E-09 6.4274E-07 8.2538E-12 1.6014E-08 5.5234E-12 5.4076E-09 9.2192E-09 1.2895E-06 1.1258E-09 2.0632E-06 7.1851E-10 6.4274E-07 1.2895E-06 2.0594E-04 # lat0 lon0 xBary yBary zBary JD0 -12.588674 141.872585 0.988011 0.024258 0.107749 2457335.063619 # Heliocentric elements and errors Epoch: 2457330.5000 = 2015/11/04 Mean Anomaly: 338.52404 +/- 226.877 Argument of Peri: 323.41858 +/- 295.724 Long of Asc Node: 203.48250 +/- 0.267 Inclination: 14.10484 +/- 0.032 Eccentricity: 0.11654606 +/- 0.2722 Semi-Major Axis: 47.27040265 +/- 1.8705 Time of Perihelion: 2464412.1170 +/- 74810.8 Perihelion: 41.76122354 +/- 12.9747 Aphelion: 52.77958177 +/- 13.0374 Period (y) 325.0066 +/- 19.29 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.81241200 +/- 0.1321 Ecliptic Y 26.21994043 +/- 0.1037 Ecliptic Z -9.22790622 +/- 0.0375 Ecliptic XDOT -0.00170877 +/- 0.0013 Ecliptic YDOT -0.00217271 +/- 0.0010 Ecliptic ZDOT 0.00032964 +/- 0.0004 # Distances at JD0 (AU) Heliocenter to KBO 42.24534396 +/- 0.1188 Geocenter to KBO 42.33945691 +/- 0.1721 # Hcoef: 7.14
The following table shows the complete astrometric record for 15VY227. 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 (15VY227) followed by the observatory code and reference code for the source of the astrometry.
2015 11 08.56283 09 20 49.11 +02 16 35.6 24.3r 15VY227 T09 C~8ndI 2015 11 08.56568 09 20 49.10 +02 16 35.3 23.9r 15VY227 T09 C~8ndI 2015 11 08.58052 09 20 49.11 +02 16 35.0 23.6r 15VY227 T09 C~8ndI 2015 11 08.61461 09 20 49.14 +02 16 34.3 23.8r 15VY227 T09 C~8ndI 2015 11 08.63134 09 20 49.17 +02 16 33.6 23.8r 15VY227 T09 C~8ndI 2015 11 08.64630 09 20 49.17 +02 16 33.4 23.7r 15VY227 T09 C~8ndI 2016 01 09.46456 09 19 04.53 +02 09 15.8 22.9y 15VY227 T09 C~8ndI 2016 01 09.50342 09 19 04.39 +02 09 16.0 22.9y 15VY227 T09 C~8ndI 2016 01 09.50886 09 19 04.38 +02 09 16.1 22.7y 15VY227 T09 C~8ndI 2016 01 09.53104 09 19 04.28 +02 09 16.1 23.3y 15VY227 T09 C~8ndI 2016 01 09.53376 09 19 04.26 +02 09 16.5 23.1y 15VY227 T09 C~8ndI 2016 01 09.58268 09 19 04.06 +02 09 16.8 23.1y 15VY227 T09 C~8ndI 2016 01 12.39231 09 18 52.82 +02 09 46.7 22.9z 15VY227 T09 C~8ndI 2016 01 12.40380 09 18 52.77 +02 09 47.0 22.8z 15VY227 T09 C~8ndI 2016 01 12.40929 09 18 52.74 +02 09 47.0 22.9z 15VY227 T09 C~8ndI 2016 01 12.41467 09 18 52.73 +02 09 47.0 22.8z 15VY227 T09 C~8ndI
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 0.27
2 0.0000 -0.05 -0.01 -0.33 -0.02
3 0.0000 0.19 -0.08 -0.57 -0.00
4 0.0001 0.83 -0.13 -1.09 0.05
5 0.0002 1.48 0.18 -1.62 -0.18
6 0.0002 1.54 -0.07 -1.81 -0.12
7 0.1695 -1351.12 -0.22 -908.38 0.07
8 0.1696 -1353.18 0.07 -908.84 -0.02
9 0.1696 -1353.35 0.22 -908.79 0.08
10 0.1697 -1354.77 0.14 -909.26 -0.18
11 0.1697 -1355.18 -0.11 -908.98 0.13
12 0.1698 -1358.13 -0.10 -909.63 -0.06
13 0.1775 -1527.51 0.06 -933.95 -0.07
14 0.1775 -1528.32 -0.03 -933.89 0.08
15 0.1775 -1528.75 -0.11 -934.04 -0.01
16 0.1776 -1528.89 0.08 -934.08 -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.
15VY227 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0