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: 15TA361 # Created Tue Apr 1 01:10:35 2025 # Orbit generated from Bernstein formalism # Fitting 23 observations of 23 # Arc: 4.94y # First observation: 2013/10/03 # Last observation: 2018/09/11 Preliminary a, adot, b, bdot, g, gdot: -0.000065 0.019608 0.000003 0.000240 0.021844 0.000000 # Chi-squared of fit: 9.52 DOF: 40 RMS: 0.11 # Min/Max residuals: -0.24 0.26 # Exact a, adot, b, bdot, g, gdot: 1.375183E-05 1.967429E-02 -5.047562E-07 2.433329E-04 2.213682E-02 1.004773E-03 # Covariance matrix: 4.7682E-13 -2.1795E-13 -8.6996E-16 -1.6129E-15 2.7687E-13 -8.3350E-13 -2.1795E-13 2.1465E-13 -2.0465E-15 2.6864E-15 1.9139E-14 1.8548E-12 -8.6996E-16 -2.0465E-15 2.4783E-13 -7.5254E-14 -6.2810E-15 -3.3269E-14 -1.6129E-15 2.6864E-15 -7.5254E-14 3.0875E-14 1.4470E-15 2.9534E-14 2.7687E-13 1.9139E-14 -6.2810E-15 1.4470E-15 7.2187E-13 1.6903E-12 -8.3350E-13 1.8548E-12 -3.3269E-14 2.9534E-14 1.6903E-12 2.1829E-11 # lat0 lon0 xBary yBary zBary JD0 -5.104061 15.699874 0.103975 -0.088445 -0.991335 2456568.623468 # Heliocentric elements and errors Epoch: 2456560.5000 = 2013/09/25 Mean Anomaly: 145.28243 +/- 0.134 Argument of Peri: 127.25153 +/- 0.129 Long of Asc Node: 97.78548 +/- 0.006 Inclination: 5.04045 +/- 0.000 Eccentricity: 0.08694208 +/- 0.0001 Semi-Major Axis: 42.99677341 +/- 0.0059 Time of Perihelion: 2415001.7165 +/- 37.3 Perihelion: 39.25854433 +/- 0.0084 Aphelion: 46.73500250 +/- 0.0091 Period (y) 281.9434 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 44.30152359 +/- 0.0017 Ecliptic Y 12.34769614 +/- 0.0005 Ecliptic Z -4.01890876 +/- 0.0002 Ecliptic XDOT -0.00054288 +/- 0.0000 Ecliptic YDOT 0.00237537 +/- 0.0000 Ecliptic ZDOT 0.00001906 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.16537902 +/- 0.0016 Geocenter to KBO 45.17361371 +/- 0.0017 # Hcoef: 7.02
The following table shows the complete astrometric record for 15TA361. 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 (15TA361) followed by the observatory code and reference code for the source of the astrometry.
2013 10 03.12269 01 05 42.078 +01 27 58.34 23.7g 15TA361 W84 C~52Rd 2013 11 08.19405 01 03 17.585 +01 14 05.38 23.8r 15TA361 W84 C~52Rd 2013 11 08.19544 01 03 17.585 +01 14 04.94 22.5i 15TA361 W84 C~52Rd 2013 11 22.16222 01 02 32.500 +01 10 31.19 24.1i 15TA361 W84 C~52Rd 2014 10 28.21151 01 08 08.075 +01 44 26.70 23.5r 15TA361 W84 C~52Rd 2015 10 10.323343 01 13 30.520 +02 18 12.48 23.7r 15TA361 568 C~2TuU 2015 10 10.354562 01 13 30.391 +02 18 11.68 23.5r 15TA361 568 C~2TuU 2015 10 10.388957 01 13 30.244 +02 18 10.78 23.6r 15TA361 568 C~2TuU 2015 10 14.300446 01 13 13.908 +02 16 32.09 25.1g 15TA361 568 C~2TuU 2015 10 14.303346 01 13 13.898 +02 16 31.99 24.5g 15TA361 568 C~2TuU 2015 10 14.368809 01 13 13.618 +02 16 30.32 24.5g 15TA361 568 C~2TuU 2015 11 07.11873 01 11 38.184 +02 07 35.74 23.5r 15TA361 W84 C~52Rd 2016 08 26.33375 01 20 15.345 +03 02 31.38 23.7r 15TA361 W84 C~52Rd 2016 08 26.33512 01 20 15.330 +03 02 31.20 23.4i 15TA361 W84 C~52Rd 2016 10 23.22109 01 16 40.994 +02 39 02.44 22.9r 15TA361 W84 C~52Rd 2016 11 05.16032 01 15 49.480 +02 34 21.16 23.6r 15TA361 W84 C~52Rd 2016 11 05.18100 01 15 49.396 +02 34 20.98 22.6i 15TA361 W84 C~52Rd 2017 08 28.33766 01 24 16.241 +03 27 59.65 23.5r 15TA361 W84 C~52Rd 2017 08 28.36829 01 24 16.156 +03 27 59.07 23.4i 15TA361 W84 C~52Rd 2017 08 28.37240 01 24 16.147 +03 27 59.03 23.1z 15TA361 W84 C~52Rd 2017 08 28.37650 01 24 16.137 +03 27 59.05 24.0r 15TA361 W84 C~52Rd 2018 09 11.35023 01 27 41.345 +03 48 59.00 23.8r 15TA361 W84 C~52Rd 2018 09 11.35161 01 27 41.345 +03 48 59.19 23.4i 15TA361 W84 C~52Rd
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 0.14
2 0.0988 -2320.68 0.09 60.89 0.17
3 0.0988 -2320.85 0.01 60.48 -0.24
4 0.1370 -3027.38 -0.12 122.24 -0.09
5 1.0680 2400.82 0.24 74.76 -0.13
6 2.0183 7645.14 -0.10 98.08 0.03
7 2.0184 7643.04 -0.06 98.08 0.00
8 2.0185 7640.66 -0.08 98.09 -0.02
9 2.0292 7376.33 -0.13 100.43 0.04
10 2.0292 7376.16 -0.11 100.39 -0.00
11 2.0294 7371.64 -0.16 100.45 -0.02
12 2.0944 5843.89 -0.06 153.18 -0.07
13 2.8972 14285.75 0.11 242.75 0.04
14 2.8972 14285.47 -0.11 242.67 -0.04
15 3.0557 10766.83 0.03 163.79 0.26
16 3.0911 9943.93 0.13 198.33 -0.06
17 3.0912 9942.70 0.16 198.64 0.17
18 3.9020 18227.95 0.07 284.52 -0.09
19 3.9021 18226.54 0.04 284.47 -0.02
20 3.9021 18226.40 0.08 284.48 0.01
21 3.9021 18226.27 0.13 284.56 0.10
22 4.9397 21577.50 -0.18 285.01 -0.18
23 4.9397 21577.57 -0.03 285.19 0.00
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.
15TA361 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.228 43.247 43.210 ecceobj 0.083 0.083 0.084 incobj 5.042 5.042 5.042 qmin 38.760 38.805 38.711 qmax 47.548 47.477 47.568 amean 43.008 43.026 42.990 amin 42.674 42.685 42.640 amax 43.359 43.385 43.353 emean 0.074 0.074 0.075 emin 0.051 0.052 0.050 emax 0.097 0.096 0.098 imean 2.870 2.881 2.858 imin 1.729 1.752 1.706 imax 4.040 4.042 4.036 excite_mean 0.090 0.090 0.090 fracstop 1.000 1.000 1.000 cjmean 3.080 3.080 3.080 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 186.5 186.2 186.9 kozaiamp 180.0 180.0 179.9