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: 15VQ207 # Created Tue Jan 21 02:10:51 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 15 observations of 15 # Arc: 9.20y # First observation: 2014/09/25 # Last observation: 2023/12/07 # Chi-squared of fit: 9.82 DOF: 24 RMS: 0.14 # Min/Max residuals: -0.32 0.27 # Exact a, adot, b, bdot, g, gdot: 2.287715E-05 4.772267E-02 -6.488448E-06 -1.196970E-02 3.279824E-02 9.230524E-04 # Covariance matrix: 5.3903E-13 -2.5197E-13 -7.6217E-14 5.1832E-14 3.0065E-14 -4.7928E-13 -2.5197E-13 1.7943E-13 5.1136E-14 -4.2035E-14 8.0989E-14 3.5028E-13 -7.6217E-14 5.1136E-14 2.4745E-13 -4.8875E-14 -1.6211E-14 1.1611E-13 5.1832E-14 -4.2035E-14 -4.8875E-14 2.0831E-14 -2.6262E-14 -8.5521E-14 3.0065E-14 8.0989E-14 -1.6211E-14 -2.6262E-14 5.2599E-13 4.5578E-14 -4.7928E-13 3.5028E-13 1.1611E-13 -8.5521E-14 4.5578E-14 7.5610E-13 # lat0 lon0 xBary yBary zBary JD0 -25.901595 -3.124168 -0.085920 -0.437446 -0.901167 2456925.708408 # Heliocentric elements and errors Epoch: 2456926.5000 = 2014/09/26 Mean Anomaly: 0.16515 +/- 0.000 Argument of Peri: 240.36568 +/- 0.002 Long of Asc Node: 117.60370 +/- 0.000 Inclination: 28.54944 +/- 0.000 Eccentricity: 0.78636019 +/- 0.0001 Semi-Major Axis: 146.88747329 +/- 0.0809 Time of Perihelion: 2456628.2008 +/- 0.4 Perihelion: 31.38101145 +/- 0.0240 Aphelion: 262.39393514 +/- 0.1455 Period (y) 1780.2678 +/- 1.47 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.38833376 +/- 0.0006 Ecliptic Y -1.46151529 +/- 0.0000 Ecliptic Z -13.31880736 +/- 0.0003 Ecliptic XDOT -0.00015415 +/- 0.0000 Ecliptic YDOT 0.00399317 +/- 0.0000 Ecliptic ZDOT -0.00093235 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 31.39145389 +/- 0.0006 Geocenter to KBO 30.48946904 +/- 0.0007 # Hcoef: 8.83
The following table shows the complete astrometric record for 15VQ207. 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 (15VQ207) followed by the observatory code and reference code for the source of the astrometry.
2014 09 25.20763 00 32 38.192 -24 51 08.59 23.5i 15VQ207 W84 C~55XF 2014 09 25.21045 00 32 38.174 -24 51 08.84 23.6r 15VQ207 W84 C~55XF 2015 11 05.08427 00 40 57.354 -24 29 07.92 24.1r 15VQ207 W84 C~55XF 2015 12 05.14552 00 39 17.765 -24 19 24.67 24.1g 15VQ207 W84 C~55XF 2016 08 16.34974 00 59 31.960 -22 59 10.04 23.9i 15VQ207 W84 C~55XF 2016 10 28.14083 00 53 26.002 -23 50 10.95 24.2g 15VQ207 W84 C~55XF 2017 09 26.24014 01 08 12.265 -22 53 05.54 23.5i 15VQ207 W84 C~55XF 2017 09 26.24153 01 08 12.264 -22 53 05.34 23.4r 15VQ207 W84 C~55XF 2017 09 26.24920 01 08 12.191 -22 53 05.96 24.3g 15VQ207 W84 C~55XF 2017 11 23.07726 01 03 08.225 -23 06 35.11 23.1r 15VQ207 W84 C~55XF 2017 11 26.07464 01 02 57.751 -23 05 31.23 24.0i 15VQ207 W84 C~55XF 2017 12 07.09166 01 02 27.316 -23 00 08.97 24.8g 15VQ207 W84 C~55XF 2023 12 07.085470 02 07 11.597 -18 08 27.43 24.2G 15VQ207 G37 C~7dK1 2023 12 07.136110 02 07 11.355 -18 08 26.29 15VQ207 G37 C~7dK1 2023 12 07.188000 02 07 11.166 -18 08 25.35 15VQ207 G37 C~7dK1
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 0.14
2 0.0000 0.00 -0.06 0.00 0.01
3 1.1112 0.00 0.10 0.00 0.07
4 1.1935 0.00 0.01 0.00 0.13
5 1.8922 0.00 0.04 0.00 0.13
6 2.0915 0.00 -0.05 0.00 0.02
7 3.0035 0.00 0.12 0.00 -0.28
8 3.0035 0.00 0.22 0.00 -0.02
9 3.0035 0.00 -0.22 0.00 -0.30
10 3.1619 0.00 -0.05 0.00 0.03
11 3.1701 0.00 0.13 0.00 0.00
12 3.2002 0.00 -0.02 0.00 -0.05
13 9.1988 0.00 0.27 0.00 0.08
14 9.1990 0.00 -0.32 0.00 0.13
15 9.1991 0.00 -0.04 0.00 -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.
15VQ207 quality flag:3 Type: CENTAURS CENTAURS CENTAURS axisobj 152.778 152.775 152.782 ecceobj 0.795 0.795 0.795 incobj 28.537 28.537 28.537 qmin 29.760 29.706 29.733 qmax 281.291 278.804 282.249 amean 147.273 145.661 146.610 amin 141.632 140.149 141.472 amax 156.549 155.002 156.699 emean 0.787 0.785 0.787 emin 0.778 0.768 0.774 emax 0.798 0.799 0.801 imean 26.907 26.841 26.687 imin 26.145 26.013 26.068 imax 28.010 28.486 28.264 excite_mean 0.908 0.905 0.906 fracstop 1.000 1.000 1.000 cjmean 2.638 2.639 2.638 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 283.3 283.8 280.8 kozaiamp 39.5 43.0 41.2