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: 15AS293 # Created Sun Apr 27 01:10:19 2025 # Orbit generated from Bernstein formalism # Fitting 26 observations of 26 # Arc: 3.89y # First observation: 2015/01/12 # Last observation: 2018/12/02 Preliminary a, adot, b, bdot, g, gdot: 0.000165 0.022398 0.000085 0.001468 0.023856 0.000000 # Chi-squared of fit: 3.23 DOF: 46 RMS: 0.06 # Min/Max residuals: -0.12 0.23 # Exact a, adot, b, bdot, g, gdot: 1.582815E-05 2.263141E-02 1.068198E-06 1.356464E-03 2.306346E-02 7.292626E-03 # Covariance matrix: 2.6397E-13 -2.6142E-13 -2.0781E-14 4.5090E-15 -1.1169E-13 -2.3522E-12 -2.6142E-13 5.4267E-13 1.9088E-15 -3.0294E-14 8.0457E-14 5.7475E-12 -2.0781E-14 1.9088E-15 1.7642E-13 -4.9023E-14 7.0473E-14 6.0763E-14 4.5090E-15 -3.0294E-14 -4.9023E-14 3.4618E-14 2.2079E-14 -3.2473E-13 -1.1169E-13 8.0457E-14 7.0473E-14 2.2079E-14 2.9095E-13 1.0585E-12 -2.3522E-12 5.7475E-12 6.0763E-14 -3.2473E-13 1.0585E-12 6.4552E-11 # lat0 lon0 xBary yBary zBary JD0 -33.989759 4.629953 -0.941206 0.156146 0.231230 2457034.550828 # Heliocentric elements and errors Epoch: 2457030.5000 = 2015/01/08 Mean Anomaly: 45.08218 +/- 0.028 Argument of Peri: 192.22940 +/- 0.011 Long of Asc Node: 88.47032 +/- 0.001 Inclination: 34.42977 +/- 0.000 Eccentricity: 0.35952964 +/- 0.0004 Semi-Major Axis: 51.36610330 +/- 0.0183 Time of Perihelion: 2440191.5193 +/- 5.5 Perihelion: 32.89846685 +/- 0.0226 Aphelion: 69.83373975 +/- 0.0315 Period (y) 368.1486 +/- 0.20 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 35.47596704 +/- 0.0008 Ecliptic Y 3.81900167 +/- 0.0001 Ecliptic Z -24.23943791 +/- 0.0006 Ecliptic XDOT 0.00058441 +/- 0.0000 Ecliptic YDOT 0.00273769 +/- 0.0000 Ecliptic ZDOT -0.00035036 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.13559274 +/- 0.0008 Geocenter to KBO 43.35863501 +/- 0.0010 # Hcoef: 6.30
The following table shows the complete astrometric record for 15AS293. 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 (15AS293) followed by the observatory code and reference code for the source of the astrometry.
2015 01 12.05005 01 15 48.351 -29 05 49.54 22.5i 15AS293 W84 C~4yVg 2015 01 13.07738 01 15 49.338 -29 04 50.77 22.7r 15AS293 W84 C~4yVg 2015 01 13.07874 01 15 49.336 -29 04 50.68 22.6i 15AS293 W84 C~4yVg 2015 01 24.05050 01 16 06.485 -28 54 02.89 22.2z 15AS293 W84 C~4yVg 2015 01 28.04177 01 16 15.665 -28 50 00.37 22.3z 15AS293 W84 C~4yVg 2015 09 04.39445 01 28 21.267 -28 37 18.03 22.4z 15AS293 W84 C~4yVg 2015 11 01.24805 01 23 50.873 -29 02 59.11 22.6z 15AS293 W84 C~4yVg 2015 11 06.23326 01 23 27.102 -29 02 58.05 22.5i 15AS293 W84 C~4yVg 2015 11 07.26250 01 23 22.318 -29 02 54.59 22.9g 15AS293 W84 C~4yVg 2015 11 07.26389 01 23 22.298 -29 02 54.72 22.4r 15AS293 W84 C~4yVg 2015 11 16.11771 01 22 42.999 -29 01 42.82 22.5r 15AS293 W84 C~4yVg 2015 11 30.20461 01 21 49.857 -28 57 10.16 22.8i 15AS293 W84 C~4yVg 2016 12 02.07839 01 26 40.750 -28 15 34.12 22.6i 15AS293 W84 C~4yVg 2017 09 26.379363 01 36 35.16 -27 28 57.5 22.8r 15AS293 W84 C~35bw 2017 09 26.37989 01 36 35.157 -27 28 57.46 22.8r 15AS293 W84 C~4yVg 2017 09 26.380741 01 36 35.14 -27 28 57.5 22.5i 15AS293 W84 C~35bw 2017 09 26.38127 01 36 35.146 -27 28 57.47 22.5i 15AS293 W84 C~4yVg 2017 11 23.08781 01 32 04.534 -27 38 21.15 22.9z 15AS293 W84 C~4yVg 2017 11 24.21711 01 32 00.200 -27 38 01.41 23.4g 15AS293 W84 C~4yVg 2017 11 26.05860 01 31 53.355 -27 37 26.25 22.6z 15AS293 W84 C~4yVg 2017 11 26.059444 01 31 53.36 -27 37 26.2 22.7i 15AS293 W84 C~35bw 2017 11 26.05997 01 31 53.360 -27 37 26.26 22.6i 15AS293 W84 C~4yVg 2018 10 27.19464 01 38 50.214 -26 58 53.41 22.6z 15AS293 W84 C~4yVg 2018 11 16.05151 01 37 18.074 -26 59 04.79 22.6i 15AS293 W84 C~4yVg 2018 12 02.10360 01 36 16.584 -26 54 40.74 22.8r 15AS293 W84 C~4yVg 2018 12 02.10497 01 36 16.582 -26 54 40.72 23.4g 15AS293 W84 C~4yVg
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 -0.06 0.00 -0.03
2 0.0028 38.20 0.05 46.50 0.00
3 0.0028 38.21 0.02 46.59 0.03
4 0.0329 532.81 0.06 521.60 -0.02
5 0.0438 750.45 -0.10 682.83 0.02
6 0.6443 9558.00 -0.02 -3092.09 0.05
7 0.8027 5692.82 -0.03 -2767.91 -0.02
8 0.8164 5417.69 -0.02 -2620.81 -0.04
9 0.8192 5363.82 0.23 -2588.36 0.01
10 0.8192 5363.53 0.01 -2588.35 -0.03
11 0.8434 4941.17 -0.05 -2283.72 -0.04
12 0.8820 4450.91 -0.02 -1717.35 0.04
13 1.8892 9010.17 -0.08 -1312.45 0.02
14 2.7059 17297.99 0.02 -2674.72 -0.12
15 2.7059 17297.98 0.04 -2674.66 -0.06
16 2.7059 17297.76 -0.12 -2674.59 0.01
17 2.7059 17297.84 0.00 -2674.60 0.00
18 2.8639 13861.02 0.16 -1407.06 0.07
19 2.8670 13819.95 -0.10 -1361.82 -0.02
20 2.8720 13757.01 -0.06 -1286.89 0.11
21 2.8720 13757.09 0.05 -1286.88 0.08
22 2.8720 13757.06 0.04 -1286.93 0.01
23 3.7896 19774.63 -0.01 -1992.95 -0.00
24 3.8439 18688.50 0.01 -1391.39 -0.02
25 3.8879 18097.55 -0.02 -754.53 -0.01
26 3.8879 18097.54 0.01 -754.50 -0.04
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.
15AS293 quality flag:2 Type: SCATNEAR SCATNEAR 9:4EEEEE axisobj 51.934 51.987 51.880 ecceobj 0.363 0.364 0.362 incobj 34.443 34.443 34.443 qmin 32.608 32.591 32.581 qmax 71.303 71.254 71.750 amean 51.698 51.698 51.699 amin 51.203 51.246 51.187 amax 52.321 52.308 52.401 emean 0.277 0.253 0.331 emin 0.196 0.171 0.280 emax 0.366 0.367 0.370 imean 35.347 35.844 33.917 imin 32.893 32.902 32.801 imax 37.101 37.500 35.371 excite_mean 0.643 0.641 0.650 fracstop 1.000 1.000 1.000 cjmean 2.633 2.633 2.634 libcent 0 -180.0 -180.0 186.2 libamp 0 -180.0 -180.0 156.4 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 258.8 245.8 230.9 kozaiamp 70.1 65.3 180.0