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: 15VQ164 # Created Sun Apr 21 01:17:30 2024 # Orbit generated from Bernstein formalism # Fitting 21 observations of 21 # Arc: 1.23y # First observation: 2015/11/06 # Last observation: 2017/01/27 Preliminary a, adot, b, bdot, g, gdot: 0.000048 0.042387 -0.000002 0.011357 0.034220 0.000000 # Chi-squared of fit: 6.59 DOF: 36 RMS: 0.10 # Min/Max residuals: -0.27 0.26 # Exact a, adot, b, bdot, g, gdot: 2.015748E-05 4.251728E-02 5.370640E-06 1.141237E-02 3.444227E-02 -1.500204E-03 # Covariance matrix: 2.7634E-13 5.6429E-13 -1.8069E-14 2.5498E-13 5.4674E-13 2.0200E-11 5.6429E-13 5.9737E-12 -1.3796E-13 1.9626E-12 3.2126E-12 1.5558E-10 -1.8069E-14 -1.3796E-13 1.3705E-13 -1.9208E-13 -8.0538E-14 -3.8118E-12 2.5498E-13 1.9626E-12 -1.9208E-13 1.0124E-12 1.1402E-12 5.4200E-11 5.4674E-13 3.2126E-12 -8.0538E-14 1.1402E-12 2.2119E-12 9.0354E-11 2.0200E-11 1.5558E-10 -3.8118E-12 5.4200E-11 9.0354E-11 4.2966E-09 # lat0 lon0 xBary yBary zBary JD0 -0.590867 53.835375 0.182911 -0.009910 -0.977760 2457332.813359 # Heliocentric elements and errors Epoch: 2457330.5000 = 2015/11/04 Mean Anomaly: 352.82236 +/- 0.247 Argument of Peri: 9.95202 +/- 0.424 Long of Asc Node: 55.61768 +/- 0.000 Inclination: 15.04784 +/- 0.001 Eccentricity: 0.24489116 +/- 0.0004 Semi-Major Axis: 39.56660237 +/- 0.0098 Time of Perihelion: 2459142.9690 +/- 62.5 Perihelion: 29.87709135 +/- 0.0168 Aphelion: 49.25611339 +/- 0.0194 Period (y) 248.8865 +/- 0.09 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 17.85285758 +/- 0.0007 Ecliptic Y 24.11949413 +/- 0.0010 Ecliptic Z -0.29926968 +/- 0.0000 Ecliptic XDOT -0.00279482 +/- 0.0000 Ecliptic YDOT 0.00189902 +/- 0.0000 Ecliptic ZDOT 0.00090840 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 30.00939991 +/- 0.0009 Geocenter to KBO 29.03409387 +/- 0.0013 # Hcoef: 9.74
The following table shows the complete astrometric record for 15VQ164. 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 (15VQ164) followed by the observatory code and reference code for the source of the astrometry.
2015 11 06.31257 03 26 26.500 +18 09 32.79 24.4r 15VQ164 568 C~2lVX 2015 11 06.37589 03 26 26.069 +18 09 31.43 24.1r 15VQ164 568 C~2lVX 2015 11 06.44667 03 26 25.600 +18 09 30.35 24.6r 15VQ164 568 C~2lVX 2015 11 07.46686 03 26 18.694 +18 09 12.03 24.4w 15VQ164 568 C~2lVX 2015 11 17.44798 03 25 10.321 +18 06 08.26 24.5w 15VQ164 568 C~2lVX 2015 11 17.49527 03 25 09.988 +18 06 07.34 24.5w 15VQ164 568 C~2lVX 2015 12 06.31417 03 23 04.171 +18 00 33.41 24.6w 15VQ164 568 C~2lVX 2015 12 06.44064 03 23 03.369 +18 00 31.42 25.5w 15VQ164 568 C~2lVX 2015 12 06.44787 03 23 03.315 +18 00 31.12 24.8w 15VQ164 568 C~2lVX 2015 12 31.33561 03 20 48.945 +17 55 09.99 25.7w 15VQ164 568 C~2lVX 2016 01 07.36493 03 20 21.892 +17 54 20.29 24.7w 15VQ164 568 C~2lVX 2016 01 07.41708 03 20 21.721 +17 54 20.22 24.4w 15VQ164 568 C~2lVY 2016 02 11.26421 03 19 42.545 +17 56 10.39 24.6w 15VQ164 568 C~2lVY 2016 10 10.56485 03 38 22.462 +19 28 47.89 24.5w 15VQ164 568 C~2lVY 2016 10 10.61331 03 38 22.212 +19 28 47.29 24.7w 15VQ164 568 C~2lVY 2016 10 28.44727 03 36 39.477 +19 25 00.01 24.7w 15VQ164 568 C~2lVY 2016 10 29.52078 03 36 32.584 +19 24 43.92 24.9w 15VQ164 568 C~2lVY 2016 10 29.54425 03 36 32.440 +19 24 43.59 24.9w 15VQ164 568 C~2lVY 2016 11 02.57381 03 36 06.054 +19 23 40.84 24.3w 15VQ164 568 C~2lVY 2016 12 24.36580 03 30 29.569 +19 09 57.08 24.7w 15VQ164 568 C~2lVY 2017 01 27.33784 03 28 40.412 +19 07 02.44 24.7w 15VQ164 568 C~2lVY
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 -0.13 0.00 -0.03
2 0.0002 -6.29 -0.16 0.20 -0.27
3 0.0004 -13.03 0.12 0.80 -0.14
4 0.0032 -112.94 0.03 7.38 0.04
5 0.0305 -1102.77 -0.01 71.03 0.07
6 0.0306 -1107.60 -0.05 71.32 0.05
7 0.0821 -2928.59 0.04 196.75 0.06
8 0.0825 -2940.17 0.26 197.70 0.10
9 0.0825 -2940.99 0.11 197.60 -0.05
10 0.1506 -4877.88 -0.03 371.93 -0.01
11 0.1699 -5264.16 -0.26 422.23 0.01
12 0.1700 -5266.54 -0.02 422.79 0.19
13 0.2654 -5779.37 0.10 672.22 0.04
14 0.9288 11017.62 0.03 2190.12 0.03
15 0.9290 11014.03 -0.01 2190.35 -0.06
16 0.9778 9544.13 -0.08 2306.02 -0.02
17 0.9807 9445.34 -0.02 2313.09 0.04
18 0.9808 9443.28 0.13 2313.24 0.04
19 0.9918 9064.86 -0.03 2339.35 -0.06
20 1.1336 4235.90 -0.04 2671.03 -0.01
21 1.2266 2692.40 0.01 2877.05 -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.
15VQ164 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.997 40.038 39.958 ecceobj 0.251 0.252 0.251 incobj 15.006 15.006 15.006 qmin 28.040 28.775 27.687 qmax 51.451 50.830 51.773 amean 39.455 39.456 39.455 amin 38.971 38.942 38.985 amax 40.040 40.064 39.989 emean 0.242 0.246 0.249 emin 0.183 0.223 0.181 emax 0.288 0.270 0.296 imean 13.537 13.327 13.079 imin 11.143 12.150 10.415 imax 16.260 14.207 15.953 excite_mean 0.338 0.338 0.338 fracstop 1.000 1.000 1.000 cjmean 2.922 2.922 2.922 libcent 0 180.3 179.4 180.3 libamp 0 101.6 121.8 86.6 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 87.6 158.4 100.0 kozaiamp 83.8 151.1 92.3