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: 15QB34 # Created Sun Nov 24 02:10:23 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 25 observations of 25 # Arc: 6.23y # First observation: 2015/08/18 # Last observation: 2021/11/11 # Chi-squared of fit: 3.50 DOF: 44 RMS: 0.07 # Min/Max residuals: -0.23 0.23 # Exact a, adot, b, bdot, g, gdot: 1.839481E-05 3.396061E-02 2.593353E-06 4.576360E-03 2.944365E-02 -5.164974E-03 # Covariance matrix: 2.6550E-13 -4.6187E-14 1.3072E-14 -4.7860E-15 1.4819E-13 -1.8475E-13 -4.6187E-14 1.9738E-13 -9.2301E-15 2.4017E-14 1.9506E-13 8.7171E-13 1.3072E-14 -9.2301E-15 1.3014E-13 -3.4871E-14 4.8894E-15 -5.5480E-14 -4.7860E-15 2.4017E-14 -3.4871E-14 1.8659E-14 2.2064E-14 1.1786E-13 1.4819E-13 1.9506E-13 4.8894E-15 2.2064E-14 4.0183E-13 7.8767E-13 -1.8475E-13 8.7171E-13 -5.5480E-14 1.1786E-13 7.8767E-13 4.2879E-12 # lat0 lon0 xBary yBary zBary JD0 -17.839230 18.710568 0.817264 -0.184203 -0.572929 2457252.907119 # Heliocentric elements and errors Epoch: 2457252.5000 = 2015/08/18 Mean Anomaly: 330.64881 +/- 0.007 Argument of Peri: 341.99306 +/- 0.011 Long of Asc Node: 84.20842 +/- 0.001 Inclination: 18.95058 +/- 0.000 Eccentricity: 0.26840574 +/- 0.0001 Semi-Major Axis: 43.64152959 +/- 0.0048 Time of Perihelion: 2465838.1185 +/- 16.0 Perihelion: 31.92789241 +/- 0.0049 Aphelion: 55.35516676 +/- 0.0070 Period (y) 288.3090 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 31.45007580 +/- 0.0007 Ecliptic Y 9.79021672 +/- 0.0002 Ecliptic Z -10.40445285 +/- 0.0002 Ecliptic XDOT -0.00132456 +/- 0.0000 Ecliptic YDOT 0.00287977 +/- 0.0000 Ecliptic ZDOT 0.00055226 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 34.54295523 +/- 0.0006 Geocenter to KBO 33.96330325 +/- 0.0007 # Hcoef: 7.35
The following table shows the complete astrometric record for 15QB34. 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 (15QB34) followed by the observatory code and reference code for the source of the astrometry.
2015 08 18.40633 01 36 07.642 -09 11 01.48 23.4r 15QB34 W84 C~55Wd 2015 08 18.40770 01 36 07.648 -09 11 01.47 23.2g 15QB34 W84 C~55Wd 2015 08 23.38539 01 35 56.048 -09 14 10.40 22.9r 15QB34 W84 C~55Wd 2015 09 13.26837 01 34 43.673 -09 27 57.25 23.5g 15QB34 W84 C~55Wd 2015 09 13.26977 01 34 43.671 -09 27 57.30 22.3i 15QB34 W84 C~55Wd 2015 11 16.20888 01 29 13.159 -09 56 00.44 23.5g 15QB34 W84 C~55Wd 2016 10 03.27484 01 40 01.102 -08 40 59.93 22.2i 15QB34 W84 C~55Wd 2016 10 03.27622 01 40 01.096 -08 41 00.03 22.4r 15QB34 W84 C~55Wd 2016 10 03.27759 01 40 01.093 -08 41 00.05 23.2g 15QB34 W84 C~55Wd 2016 11 04.16264 01 37 06.460 -08 54 43.64 22.3i 15QB34 W84 C~55Wd 2016 11 19.10082 01 35 52.108 -08 57 03.26 22.8r 15QB34 W84 C~55Wd 2016 11 19.10449 01 35 52.103 -08 57 03.31 23.3g 15QB34 W84 C~55Wd 2016 12 05.05270 01 34 48.268 -08 56 03.45 22.2z 15QB34 W84 C~55Wd 2017 11 09.19010 01 43 41.052 -07 55 11.70 22.4i 15QB34 W84 C~55Wd 2017 11 16.12068 01 43 05.890 -07 56 21.31 23.7g 15QB34 W84 C~55Wd 2017 11 18.11962 01 42 56.198 -07 56 34.11 22.5r 15QB34 W84 C~55Wd 2017 11 23.10111 01 42 33.100 -07 56 51.43 22.5z 15QB34 W84 C~55Wd 2018 09 09.36566 01 55 55.715 -06 22 42.51 22.3z 15QB34 W84 C~55Wd 2018 10 20.27310 01 52 35.454 -06 46 21.55 22.2z 15QB34 W84 C~55Wd 2018 11 15.09127 01 50 14.145 -06 54 30.09 22.3i 15QB34 W84 C~55Wd 2018 12 01.05684 01 49 00.419 -06 55 17.19 22.6r 15QB34 W84 C~55Wd 2018 12 01.05822 01 49 00.412 -06 55 17.20 22.9g 15QB34 W84 C~55Wd 2021 11 11.352917 02 12 00.330 -03 41 59.04 22.9w 15QB34 F51 C~5BZ6 2021 11 11.378402 02 12 00.179 -03 41 59.65 22.7w 15QB34 F51 C~5BZ6 2021 11 11.391144 02 12 00.114 -03 42 00.08 22.6w 15QB34 F51 C~5BZ6
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 -0.02 0.00 -0.04
2 0.0000 0.00 0.12 0.00 0.02
3 0.0136 0.00 -0.02 0.00 0.01
4 0.0708 0.00 -0.08 0.00 0.00
5 0.0708 0.00 -0.02 0.00 0.01
6 0.2459 0.00 0.06 0.00 -0.07
7 1.1276 0.00 -0.03 0.00 0.01
8 1.1276 0.00 -0.01 0.00 -0.05
9 1.1276 0.00 0.06 0.00 -0.02
10 1.2149 0.00 -0.04 0.00 0.04
11 1.2558 0.00 -0.07 0.00 0.09
12 1.2558 0.00 0.11 0.00 0.05
13 1.2995 0.00 0.02 0.00 0.09
14 2.2280 0.00 0.09 0.00 -0.01
15 2.2470 0.00 -0.04 0.00 0.00
16 2.2525 0.00 -0.06 0.00 0.01
17 2.2661 0.00 -0.00 0.00 -0.01
18 3.0608 0.00 0.03 0.00 0.01
19 3.1728 0.00 0.08 0.00 -0.07
20 3.2435 0.00 0.00 0.00 -0.01
21 3.2872 0.00 -0.00 0.00 -0.00
22 3.2872 0.00 -0.02 0.00 -0.02
23 6.2339 0.00 0.03 0.00 0.23
24 6.2340 0.00 -0.08 0.00 0.01
25 6.2340 0.00 0.02 0.00 -0.23
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.
15QB34 quality flag:2 Type: SCATNEAR SCATNEAR 7:4EEE axisobj 44.155 44.155 44.155 ecceobj 0.274 0.274 0.274 incobj 18.952 18.952 18.952 qmin 31.553 30.746 31.553 qmax 56.549 57.374 56.548 amean 43.725 43.725 43.725 amin 43.279 43.283 43.272 amax 44.261 44.261 44.254 emean 0.224 0.233 0.225 emin 0.148 0.146 0.142 emax 0.278 0.297 0.278 imean 19.041 18.647 19.007 imin 17.083 16.292 17.085 imax 21.679 21.706 21.650 excite_mean 0.398 0.399 0.398 fracstop 1.000 1.000 1.000 cjmean 2.907 2.906 2.906 libcent 0 -180.0 -180.0 182.3 libamp 0 -180.0 -180.0 177.3 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 185.5 165.9 180.8 kozaiamp 179.9 179.9 180.0