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: 15QA34 # Created Wed Dec 25 02:10:22 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 20 observations of 20 # Arc: 7.28y # First observation: 2015/08/18 # Last observation: 2022/11/28 # Chi-squared of fit: 8.14 DOF: 34 RMS: 0.11 # Min/Max residuals: -0.38 0.19 # Exact a, adot, b, bdot, g, gdot: 1.931508E-05 3.511749E-02 2.943567E-06 5.507846E-03 2.829043E-02 -3.358503E-03 # Covariance matrix: 2.8949E-13 -2.2412E-13 2.6278E-14 -3.2448E-14 -7.7169E-14 -7.5889E-13 -2.2412E-13 3.9228E-13 -3.6331E-14 5.5768E-14 3.3320E-13 1.3282E-12 2.6278E-14 -3.6331E-14 1.4343E-13 -3.5573E-14 -1.7862E-14 -1.3892E-13 -3.2448E-14 5.5768E-14 -3.5573E-14 2.1523E-14 4.1915E-14 2.0120E-13 -7.7169E-14 3.3320E-13 -1.7862E-14 4.1915E-14 4.6492E-13 1.0239E-12 -7.5889E-13 1.3282E-12 -1.3892E-13 2.0120E-13 1.0239E-12 4.7705E-12 # lat0 lon0 xBary yBary zBary JD0 -23.801506 20.545763 0.836364 -0.231896 -0.526153 2457252.882409 # Heliocentric elements and errors Epoch: 2457252.5000 = 2015/08/18 Mean Anomaly: 352.69642 +/- 0.004 Argument of Peri: 310.21333 +/- 0.010 Long of Asc Node: 88.76232 +/- 0.000 Inclination: 24.80009 +/- 0.000 Eccentricity: 0.45580623 +/- 0.0001 Semi-Major Axis: 64.48147259 +/- 0.0106 Time of Perihelion: 2461089.4305 +/- 45.7 Perihelion: 35.09041566 +/- 0.0078 Aphelion: 93.87252952 +/- 0.0163 Period (y) 517.7983 +/- 0.13 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 31.11234302 +/- 0.0007 Ecliptic Y 10.76913348 +/- 0.0003 Ecliptic Z -14.26514317 +/- 0.0003 Ecliptic XDOT -0.00127178 +/- 0.0000 Ecliptic YDOT 0.00314714 +/- 0.0000 Ecliptic ZDOT 0.00061892 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 35.88108602 +/- 0.0007 Geocenter to KBO 35.34774472 +/- 0.0009 # Hcoef: 8.15
The following table shows the complete astrometric record for 15QA34. 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 (15QA34) followed by the observatory code and reference code for the source of the astrometry.
2015 08 18.38162 01 51 54.960 -14 02 11.17 24.4g 15QA34 W84 C~55Wd 2015 08 18.38435 01 51 54.957 -14 02 11.16 24.4g 15QA34 W84 C~55Wd 2015 08 23.39502 01 51 45.829 -14 05 42.35 24.2r 15QA34 W84 C~55Wd 2015 09 04.34300 01 51 14.581 -14 14 14.98 23.3z 15QA34 W84 C~55Wd 2016 09 07.36205 01 58 14.021 -13 12 19.13 23.4r 15QA34 W84 C~55Wd 2016 09 07.36344 01 58 14.026 -13 12 19.34 23.3i 15QA34 W84 C~55Wd 2016 09 07.36482 01 58 14.016 -13 12 19.44 24.5g 15QA34 W84 C~55Wd 2016 09 30.23645 01 56 39.370 -13 27 24.96 22.7i 15QA34 W84 C~55Wd 2016 09 30.23783 01 56 39.367 -13 27 24.99 23.5r 15QA34 W84 C~55Wd 2016 09 30.23921 01 56 39.349 -13 27 25.20 24.0g 15QA34 W84 C~55Wd 2017 08 21.34900 02 06 06.043 -11 54 41.34 24.3r 15QA34 W84 C~55Wd 2017 08 21.35038 02 06 06.005 -11 54 41.53 23.4g 15QA34 W84 C~55Wd 2017 11 18.18244 01 59 39.373 -12 38 00.24 23.4r 15QA34 W84 C~55Wd 2017 11 24.16406 01 59 11.378 -12 37 47.91 24.1g 15QA34 W84 C~55Wd 2017 12 22.14128 01 57 34.539 -12 29 29.67 24.5r 15QA34 W84 C~55Wd 2018 01 09.09194 01 57 11.566 -12 18 17.24 23.8r 15QA34 W84 C~55Wd 2018 01 09.09332 01 57 11.558 -12 18 17.17 23.4i 15QA34 W84 C~55Wd 2022 11 28.227960 02 34 49.192 -06 55 54.18 23.5G 15QA34 G37 C~67A0 2022 11 28.278690 02 34 48.945 -06 55 54.22 15QA34 G37 C~67A0 2022 11 28.328190 02 34 48.698 -06 55 54.14 15QA34 G37 C~67A0
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 0.05
2 0.0000 0.00 0.07 0.00 0.17
3 0.0137 0.00 0.02 0.00 -0.05
4 0.0464 0.00 -0.10 0.00 -0.24
5 1.0568 0.00 0.03 0.00 0.12
6 1.0568 0.00 0.18 0.00 -0.03
7 1.0568 0.00 0.10 0.00 -0.08
8 1.1194 0.00 -0.04 0.00 0.04
9 1.1194 0.00 0.02 0.00 0.06
10 1.1194 0.00 -0.15 0.00 -0.10
11 2.0095 0.00 0.16 0.00 0.19
12 2.0095 0.00 -0.38 0.00 0.05
13 2.2527 0.00 -0.07 0.00 0.07
14 2.2691 0.00 0.18 0.00 -0.05
15 2.3457 0.00 0.07 0.00 -0.12
16 2.3948 0.00 0.05 0.00 -0.02
17 2.3948 0.00 -0.07 0.00 -0.01
18 7.2795 0.00 -0.03 0.00 0.04
19 7.2797 0.00 0.03 0.00 -0.05
20 7.2798 0.00 -0.00 0.00 -0.03
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.
15QA34 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 65.725 65.725 65.726 ecceobj 0.465 0.465 0.465 incobj 24.805 24.805 24.805 qmin 34.104 34.390 33.922 qmax 97.452 97.076 97.410 amean 64.927 64.928 64.928 amin 64.039 64.092 64.077 amax 66.134 66.078 66.066 emean 0.461 0.458 0.460 emin 0.449 0.449 0.448 emax 0.474 0.469 0.477 imean 23.102 23.302 23.154 imin 22.653 23.064 22.462 imax 23.602 23.598 23.706 excite_mean 0.605 0.605 0.605 fracstop 1.000 1.000 1.000 cjmean 2.862 2.862 2.862 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 181.1 173.0 190.1 kozaiamp 179.9 180.0 180.0