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: 15TW361 # Created Sun Dec 22 02:10:31 2024 # Orbit generated from Bernstein formalism # Fitting 40 observations of 40 # Arc: 3.95y # First observation: 2013/10/04 # Last observation: 2017/09/14 Preliminary a, adot, b, bdot, g, gdot: -0.000156 0.033861 -0.000003 0.008913 0.027614 0.000000 # Chi-squared of fit: 11.89 DOF: 74 RMS: 0.10 # Min/Max residuals: -0.32 0.30 # Exact a, adot, b, bdot, g, gdot: 1.973045E-05 3.384190E-02 5.279241E-06 8.925552E-03 2.788806E-02 5.625898E-06 # Covariance matrix: 3.5021E-13 -2.2568E-13 2.9281E-14 -3.8267E-14 1.0405E-14 -9.5515E-13 -2.2568E-13 3.1855E-13 -6.6217E-14 8.3424E-14 2.5438E-13 2.1042E-12 2.9281E-14 -6.6217E-14 2.1656E-13 -8.5747E-14 -7.4367E-14 -4.9901E-13 -3.8267E-14 8.3424E-14 -8.5747E-14 5.1269E-14 9.0374E-14 6.2434E-13 1.0405E-14 2.5438E-13 -7.4367E-14 9.0374E-14 5.8143E-13 2.3038E-12 -9.5515E-13 2.1042E-12 -4.9901E-13 6.2434E-13 2.3038E-12 1.5779E-11 # lat0 lon0 xBary yBary zBary JD0 -8.088950 14.855501 0.071452 -0.140297 -0.987890 2456569.662398 # Heliocentric elements and errors Epoch: 2456560.5000 = 2013/09/25 Mean Anomaly: 359.84287 +/- 0.006 Argument of Peri: 331.94136 +/- 0.020 Long of Asc Node: 42.23182 +/- 0.000 Inclination: 16.67480 +/- 0.000 Eccentricity: 0.47009001 +/- 0.0001 Semi-Major Axis: 69.53197430 +/- 0.0146 Time of Perihelion: 2456652.9343 +/- 3.8 Perihelion: 36.84568810 +/- 0.0103 Aphelion: 102.21826050 +/- 0.0226 Period (y) 579.8091 +/- 0.18 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 35.29645589 +/- 0.0009 Ecliptic Y 9.29167879 +/- 0.0002 Ecliptic Z -5.04537586 +/- 0.0001 Ecliptic XDOT -0.00073826 +/- 0.0000 Ecliptic YDOT 0.00324169 +/- 0.0000 Ecliptic ZDOT 0.00086759 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.84604335 +/- 0.0009 Geocenter to KBO 35.85763502 +/- 0.0010 # Hcoef: 7.18
The following table shows the complete astrometric record for 15TW361. 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 (15TW361) followed by the observatory code and reference code for the source of the astrometry.
2013 10 04.16162 01 07 11.133 -01 36 43.17 23.7g 15TW361 W84 C~4yYX 2013 10 11.23671 01 06 35.410 -01 39 46.64 23.2g 15TW361 W84 C~4yYX 2013 10 11.24748 01 06 35.351 -01 39 46.97 22.9r 15TW361 W84 C~4yYX 2014 10 21.25380 01 12 08.228 -00 30 38.58 23.5g 15TW361 W84 C~4yYX 2014 10 28.23905 01 11 33.703 -00 33 07.49 22.6r 15TW361 W84 C~4yYX 2014 11 15.09832 01 10 13.474 -00 37 49.08 23.1r 15TW361 W84 C~4yYX 2014 11 17.112940 01 10 05.45 -00 38 10.2 22.2z 15TW361 W84 C~352l 2014 11 17.11347 01 10 05.456 -00 38 10.48 22.6z 15TW361 W84 C~4yYX 2014 11 28.11599 01 09 26.602 -00 39 24.03 22.6z 15TW361 W84 C~4yYX 2015 10 10.309081 01 19 26.359 +00 46 51.17 22.6r 15TW361 568 C~2TuU 2015 10 10.380358 01 19 25.989 +00 46 49.33 22.7r 15TW361 568 C~2TuU 2015 10 10.410464 01 19 25.836 +00 46 48.55 22.6r 15TW361 568 C~2TuU 2015 10 14.326097 01 19 05.950 +00 45 09.82 23.2g 15TW361 568 C~2TuU 2015 10 14.358183 01 19 05.782 +00 45 09.03 23.1g 15TW361 568 C~2TuU 2015 10 14.360299 01 19 05.771 +00 45 08.99 23.3g 15TW361 568 C~2TuU 2015 10 14.390207 01 19 05.617 +00 45 08.25 23.3g 15TW361 568 C~2TuU 2015 10 14.400988 01 19 05.562 +00 45 07.93 23.3g 15TW361 568 C~2TuU 2015 11 02.118345 01 17 32.28 +00 38 14.9 22.8r 15TW361 W84 C~352l 2015 11 02.11888 01 17 32.284 +00 38 14.69 22.8r 15TW361 W84 C~4yYX 2016 08 16.38438 01 29 17.093 +02 20 45.50 22.1z 15TW361 W84 C~4yYX 2016 08 16.38576 01 29 17.082 +02 20 45.60 22.9i 15TW361 W84 C~4yYX 2016 08 31.35686 01 28 37.847 +02 16 00.55 23.2g 15TW361 W84 C~4yYX 2016 10 23.22246 01 24 37.802 +01 54 09.79 22.8r 15TW361 W84 C~4yYX 2016 10 28.16466 01 24 13.084 +01 52 22.10 22.3i 15TW361 W84 C~4yYX 2016 10 28.16604 01 24 13.067 +01 52 21.85 23.7g 15TW361 W84 C~4yYX 2016 11 05.144630 01 23 34.45 +01 49 46.3 22.7i 15TW361 W84 C~352l 2016 11 05.14516 01 23 34.448 +01 49 46.26 22.7i 15TW361 W84 C~4yYX 2016 11 05.146019 01 23 34.44 +01 49 46.3 23.4g 15TW361 W84 C~352l 2016 11 05.14655 01 23 34.441 +01 49 46.24 23.3g 15TW361 W84 C~4yYX 2016 11 05.18795 01 23 34.244 +01 49 45.56 22.4z 15TW361 W84 C~4yYX 2017 08 27.374329 01 35 08.01 +03 29 20.1 22.5i 15TW361 W84 C~352l 2017 08 27.37486 01 35 08.012 +03 29 20.04 22.4i 15TW361 W84 C~4yYX 2017 08 27.388160 01 35 07.97 +03 29 19.8 22.9r 15TW361 W84 C~352l 2017 08 27.38869 01 35 07.968 +03 29 19.75 22.9r 15TW361 W84 C~4yYX 2017 08 27.389549 01 35 07.96 +03 29 19.7 23.9g 15TW361 W84 C~352l 2017 08 27.39008 01 35 07.966 +03 29 19.68 23.6g 15TW361 W84 C~4yYX 2017 08 28.339861 01 35 05.30 +03 29 01.7 22.8z 15TW361 W84 C~352l 2017 08 28.34038 01 35 05.298 +03 29 01.74 22.6z 15TW361 W84 C~4yYX 2017 09 14.302106 01 34 06.25 +03 22 54.0 22.3z 15TW361 W84 C~352l 2017 09 14.30264 01 34 06.248 +03 22 53.98 22.2z 15TW361 W84 C~4yYX
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 -0.11 0.00 -0.05
2 0.0194 -564.99 0.11 36.64 0.01
3 0.0194 -565.94 0.04 36.68 -0.02
4 1.0461 5639.76 0.07 1945.04 -0.03
5 1.0652 5104.12 -0.01 2006.93 -0.13
6 1.1141 3884.45 0.03 2210.17 -0.06
7 1.1196 3765.20 0.01 2237.00 0.15
8 1.1196 3765.17 0.02 2236.70 -0.15
9 1.1498 3198.80 -0.19 2393.08 -0.32
10 2.0155 13514.47 0.02 3710.73 0.12
11 2.0157 13508.62 -0.03 3711.16 0.12
12 2.0157 13506.19 0.00 3711.32 0.10
13 2.0265 13191.56 0.00 3734.91 0.09
14 2.0265 13188.92 -0.03 3735.15 0.11
15 2.0266 13188.75 -0.02 3735.17 0.12
16 2.0266 13186.32 -0.01 3735.38 0.12
17 2.0267 13185.43 -0.02 3735.40 0.06
18 2.0779 11729.68 0.10 3892.39 0.30
19 2.0779 11729.66 0.11 3892.17 0.08
20 2.8671 23949.54 -0.05 5524.11 -0.20
21 2.8671 23949.42 -0.12 5524.27 -0.04
22 2.9081 23288.15 0.14 5485.68 -0.11
23 3.0529 19420.20 -0.17 5654.12 -0.07
24 3.0664 19033.29 0.13 5696.90 -0.08
25 3.0664 19032.95 -0.09 5696.77 -0.23
26 3.0882 18433.66 -0.01 5775.41 0.02
27 3.0883 18433.62 -0.01 5775.39 -0.01
28 3.0883 18433.53 -0.04 5775.47 0.06
29 3.0883 18433.52 -0.01 5775.41 -0.00
30 3.0884 18430.50 0.03 5775.91 0.05
31 3.8965 30501.74 0.01 7339.02 0.08
32 3.8965 30501.75 0.04 7338.95 0.01
33 3.8966 30501.06 -0.01 7338.97 0.05
34 3.8966 30501.01 -0.03 7338.94 0.01
35 3.8966 30500.88 -0.12 7338.94 0.01
36 3.8966 30500.95 -0.02 7338.88 -0.04
37 3.8992 30456.21 -0.01 7337.42 -0.05
38 3.8992 30456.20 -0.00 7337.47 0.00
39 3.9456 29477.82 0.12 7333.76 -0.05
40 3.9456 29477.78 0.12 7333.75 -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.
15TW361 quality flag:3 Type: 7:2EEEEE 7:2EEEEE 7:2EEEEE axisobj 70.305 70.346 70.264 ecceobj 0.476 0.476 0.476 incobj 16.659 16.659 16.660 qmin 36.084 36.051 36.108 qmax 104.897 104.749 104.860 amean 69.408 69.409 69.409 amin 68.326 68.381 68.368 amax 70.820 70.812 70.822 emean 0.462 0.462 0.463 emin 0.442 0.441 0.447 emax 0.481 0.481 0.481 imean 16.709 16.689 16.622 imin 15.723 15.711 15.748 imax 17.867 18.018 17.430 excite_mean 0.545 0.545 0.545 fracstop 1.000 1.000 1.000 cjmean 3.012 3.012 3.012 libcent 0 180.4 179.7 180.3 libamp 0 114.8 111.7 122.8 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 116.5 117.8 118.2 kozaiamp 180.0 180.0 180.0