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: 15VT165 # Created Sun Dec 22 02:10:33 2024 # Orbit generated from Bernstein formalism # Fitting 14 observations of 14 # Arc: 2.11y # First observation: 2015/08/11 # Last observation: 2017/09/20 Preliminary a, adot, b, bdot, g, gdot: -0.000154 0.043697 -0.000060 -0.010065 0.034833 0.000000 # Chi-squared of fit: 4.96 DOF: 22 RMS: 0.11 # Min/Max residuals: -0.21 0.27 # Exact a, adot, b, bdot, g, gdot: 1.970795E-05 4.306257E-02 -4.635473E-06 -1.001260E-02 3.422720E-02 6.328321E-03 # Covariance matrix: 3.6925E-13 4.0715E-13 4.7769E-14 -1.4693E-13 5.4614E-13 6.4334E-12 4.0715E-13 3.3532E-12 2.3427E-13 -9.1586E-13 2.0700E-12 4.0164E-11 4.7769E-14 2.3427E-13 1.7371E-13 -1.7189E-13 1.6945E-13 2.9750E-12 -1.4693E-13 -9.1586E-13 -1.7189E-13 4.6159E-13 -5.9827E-13 -1.1651E-11 5.4614E-13 2.0700E-12 1.6945E-13 -5.9827E-13 1.6972E-12 2.6220E-11 6.4334E-12 4.0164E-11 2.9750E-12 -1.1651E-11 2.6220E-11 5.1097E-10 # lat0 lon0 xBary yBary zBary JD0 -3.339516 50.646850 1.015203 0.002302 0.037331 2457246.085349 # Heliocentric elements and errors Epoch: 2457240.5000 = 2015/08/06 Mean Anomaly: 15.92015 +/- 0.056 Argument of Peri: 165.62164 +/- 0.111 Long of Asc Node: 214.65830 +/- 0.001 Inclination: 13.57319 +/- 0.001 Eccentricity: 0.27682326 +/- 0.0003 Semi-Major Axis: 39.28949138 +/- 0.0080 Time of Perihelion: 2453262.5660 +/- 14.0 Perihelion: 28.41324635 +/- 0.0140 Aphelion: 50.16573641 +/- 0.0164 Period (y) 246.2764 +/- 0.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 19.25201622 +/- 0.0007 Ecliptic Y 21.88062416 +/- 0.0009 Ecliptic Z -1.70204108 +/- 0.0001 Ecliptic XDOT -0.00237475 +/- 0.0000 Ecliptic YDOT 0.00253255 +/- 0.0000 Ecliptic ZDOT -0.00082898 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 29.19415671 +/- 0.0008 Geocenter to KBO 29.21652909 +/- 0.0011 # Hcoef: 9.99
The following table shows the complete astrometric record for 15VT165. 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 (15VT165) followed by the observatory code and reference code for the source of the astrometry.
2015 08 11.58456 03 16 29.880 +14 41 29.33 24.7w 15VT165 568 C~2lVc 2015 09 06.63168 03 16 38.554 +14 36 22.45 24.7w 15VT165 568 C~2lVc 2015 09 12.52133 03 16 28.060 +14 34 25.94 24.7w 15VT165 568 C~2lVc 2015 10 07.45992 03 14 58.230 +14 23 38.88 24.7w 15VT165 568 C~2lVc 2015 10 08.46335 03 14 53.282 +14 23 08.60 25.0w 15VT165 568 C~2lVc 2015 10 08.52236 03 14 52.968 +14 23 06.71 25.8w 15VT165 568 C~2lVc 2015 11 07.36952 03 11 54.719 +14 06 54.35 24.5r 15VT165 568 C~2lVc 2015 11 07.41164 03 11 54.435 +14 06 52.98 24.6r 15VT165 568 C~2lVc 2015 11 07.45387 03 11 54.164 +14 06 51.55 24.3r 15VT165 568 C~2lVc 2015 11 17.38710 03 10 48.408 +14 01 27.00 24.7w 15VT165 568 C~2lVc 2015 11 17.43381 03 10 48.094 +14 01 25.54 24.6w 15VT165 568 C~2lVc 2017 01 27.29257 03 16 24.690 +13 46 59.28 25.3w 15VT165 568 C~2lVc 2017 09 15.55206 03 37 23.552 +14 40 30.90 25.3w 15VT165 568 C~2lVc 2017 09 20.60085 03 37 11.969 +14 38 38.46 24.7w 15VT165 568 C~2lVc
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 0.04 0.00 0.00
2 0.0713 41.53 0.18 -329.08 0.27
3 0.0874 -135.91 -0.15 -401.85 0.06
4 0.1557 -1564.40 -0.10 -685.13 0.08
5 0.1585 -1641.73 0.09 -695.49 0.04
6 0.1586 -1646.62 -0.11 -696.11 -0.02
7 0.2403 -4403.52 -0.09 -949.90 -0.16
8 0.2405 -4407.87 -0.10 -950.13 -0.13
9 0.2406 -4412.05 0.07 -950.46 -0.21
10 0.2678 -5421.26 0.08 -1008.76 -0.00
11 0.2679 -5426.06 0.10 -1008.95 0.03
12 1.4640 -925.75 -0.01 -3137.47 0.07
13 2.0971 17646.09 -0.03 -4608.41 0.04
14 2.1109 17454.68 0.03 -4677.62 -0.05
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.
15VT165 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.758 39.805 39.712 ecceobj 0.286 0.287 0.284 incobj 13.527 13.527 13.527 qmin 27.430 27.081 27.317 qmax 51.883 52.331 52.331 amean 39.456 39.455 39.454 amin 39.027 39.060 39.011 amax 39.964 39.958 40.015 emean 0.229 0.249 0.274 emin 0.165 0.175 0.247 emax 0.302 0.312 0.308 imean 16.482 15.450 14.247 imin 12.764 11.859 12.522 imax 18.715 18.661 15.556 excite_mean 0.367 0.368 0.369 fracstop 1.000 1.000 1.000 cjmean 2.898 2.897 2.896 libcent 0 180.2 179.7 180.7 libamp 0 74.5 57.9 86.3 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 126.1 223.9 167.1 kozaiamp 180.0 180.0 180.0