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: 13SW100 # Created Sun Apr 27 01:09:41 2025 # Orbit generated from Bernstein formalism # Fitting 36 observations of 36 # Arc: 4.07y # First observation: 2013/08/05 # Last observation: 2017/08/30 Preliminary a, adot, b, bdot, g, gdot: -0.000123 0.023211 -0.000001 -0.000384 0.023862 0.000000 # Chi-squared of fit: 13.60 DOF: 66 RMS: 0.11 # Min/Max residuals: -0.31 0.23 # Exact a, adot, b, bdot, g, gdot: 1.520299E-05 2.307732E-02 -5.392656E-07 -3.825310E-04 2.385931E-02 7.588346E-04 # Covariance matrix: 1.1714E-13 -4.9483E-14 -2.2178E-17 3.7934E-16 5.5169E-14 -2.4223E-13 -4.9483E-14 2.1025E-13 1.5311E-15 -3.5573E-15 1.0352E-13 2.2243E-12 -2.2178E-17 1.5311E-15 6.9633E-14 -2.6027E-14 1.1076E-15 1.8351E-14 3.7934E-16 -3.5573E-15 -2.6027E-14 2.3292E-14 -2.0720E-15 -4.2363E-14 5.5169E-14 1.0352E-13 1.1076E-15 -2.0720E-15 1.6156E-13 1.2879E-12 -2.4223E-13 2.2243E-12 1.8351E-14 -4.2363E-14 1.2879E-12 2.6484E-11 # lat0 lon0 xBary yBary zBary JD0 -0.755787 12.959570 0.880299 -0.006672 -0.507847 2456509.993918 # Heliocentric elements and errors Epoch: 2456500.5000 = 2013/07/27 Mean Anomaly: 53.37760 +/- 0.552 Argument of Peri: 163.23292 +/- 0.577 Long of Asc Node: 154.00942 +/- 0.011 Inclination: 1.21887 +/- 0.000 Eccentricity: 0.01214609 +/- 0.0002 Semi-Major Axis: 42.73505646 +/- 0.0024 Time of Perihelion: 2441370.7632 +/- 156.4 Perihelion: 42.21599272 +/- 0.0086 Aphelion: 43.25412021 +/- 0.0086 Period (y) 279.3731 +/- 0.02 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 41.53339600 +/- 0.0007 Ecliptic Y 8.65774526 +/- 0.0002 Ecliptic Z -0.55282710 +/- 0.0000 Ecliptic XDOT -0.00051581 +/- 0.0000 Ecliptic YDOT 0.00259921 +/- 0.0000 Ecliptic ZDOT -0.00004490 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.42976731 +/- 0.0007 Geocenter to KBO 41.91235867 +/- 0.0007 # Hcoef: 8.12
The following table shows the complete astrometric record for 13SW100. 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 (13SW100) followed by the observatory code and reference code for the source of the astrometry.
2013 08 05.49314 00 48 52.105 +04 25 18.19 24.2r 13SW100 568 C~2NKN 2013 08 05.54160 00 48 52.031 +04 25 17.43 25.3r 13SW100 568 C~2NKN 2013 08 05.54632 00 48 52.015 +04 25 17.53 24.8r 13SW100 568 C~2NKN 2013 08 08.47205 00 48 46.465 +04 24 38.97 24.7r 13SW100 568 C~2NKN 2013 08 08.51087 00 48 46.391 +04 24 38.20 24.2r 13SW100 568 C~2NKN 2013 08 31.55693 00 47 41.900 +04 17 25.99 24.6r 13SW100 568 C~2NKN 2013 09 01.44270 00 47 38.804 +04 17 05.55 24.3r 13SW100 568 C~2NKN 2013 09 01.48164 00 47 38.656 +04 17 04.65 24.2r 13SW100 568 C~2NKN 2013 09 05.42217 00 47 24.295 +04 15 30.56 24.8r 13SW100 568 C~2NKN 2013 09 29.35316 00 45 44.992 +04 04 47.76 24.5r 13SW100 568 C~2NKN 2013 09 29.39201 00 45 44.824 +04 04 46.67 24.2r 13SW100 568 C~2NKN 2013 09 29.43584 00 45 44.623 +04 04 45.23 24.2r 13SW100 568 C~2NKN 2013 10 02.42685 00 45 31.331 +04 03 20.21 13SW100 568 C~2NKN 2013 10 07.34703 00 45 09.417 +04 01 00.39 24.4r 13SW100 568 C~2NKN 2013 11 27.27905 00 42 01.931 +03 41 26.99 24.5r 13SW100 568 C~2NKN 2013 11 27.33088 00 42 01.809 +03 41 26.32 24.3r 13SW100 568 C~2NKN 2013 12 05.23686 00 41 46.194 +03 39 53.30 24.4r 13SW100 568 C~2NKN 2014 06 25.59278 00 53 46.326 +04 55 41.74 24.8r 13SW100 568 C~2NKN 2014 06 26.59164 00 53 48.040 +04 55 51.11 24.8r 13SW100 568 C~2NKN 2014 07 27.55990 00 53 59.382 +04 56 18.77 24.3r 13SW100 568 C~2NKN 2014 08 24.48990 00 53 02.937 +04 49 49.97 24.1r 13SW100 568 C~2NKN 2014 08 28.45816 00 52 50.525 +04 48 27.78 24.4r 13SW100 568 C~2NKN 2014 08 28.46204 00 52 50.509 +04 48 27.86 24.2r 13SW100 568 C~2NKN 2014 10 27.27001 00 48 42.417 +04 22 01.30 24.0r 13SW100 568 C~2NKN 2014 10 29.26801 00 48 34.240 +04 21 10.30 24.1r 13SW100 568 C~2NKN 2014 10 29.31783 00 48 34.050 +04 21 08.88 24.6r 13SW100 568 C~2NKN 2014 11 24.26724 00 47 05.397 +04 12 02.67 24.1r 13SW100 568 C~2NKN 2014 11 25.29355 00 47 02.724 +04 11 46.50 24.3r 13SW100 568 C~2NKN 2015 01 18.24063 00 46 47.254 +04 10 59.86 24.3r 13SW100 568 C~2NKN 2015 08 20.52724 00 58 11.428 +05 20 40.63 24.4r 13SW100 568 C~2NKN 2015 12 07.36547 00 51 32.149 +04 38 50.38 24.8w 13SW100 568 C~2NKN 2017 07 23.62323 01 08 43.135 +06 23 40.73 23.9w 13SW100 568 C~2NKN 2017 08 25.54688 01 07 49.580 +06 17 27.67 24.4w 13SW100 568 C~2NKN 2017 08 25.62549 01 07 49.336 +06 17 26.27 24.4w 13SW100 568 C~2NKN 2017 08 30.48798 01 07 34.708 +06 15 50.85 24.4w 13SW100 568 C~2NKN 2017 08 30.54049 01 07 34.539 +06 15 50.06 24.5w 13SW100 568 C~2NKN
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 0.06
2 0.0001 -1.32 0.18 -0.27 -0.18
3 0.0001 -1.50 0.14 -0.08 0.01
4 0.0082 -92.96 0.15 -3.34 0.15
5 0.0083 -94.28 0.15 -3.62 -0.10
6 0.0714 -1151.03 -0.23 -26.57 -0.03
7 0.0738 -1201.64 -0.03 -27.37 -0.04
8 0.0739 -1204.03 -0.12 -27.34 0.00
9 0.0847 -1438.54 -0.20 -30.40 0.12
10 0.1502 -3057.39 0.13 -43.82 0.02
11 0.1503 -3060.13 0.23 -43.84 -0.01
12 0.1504 -3063.46 0.11 -43.99 -0.17
13 0.1586 -3279.80 -0.22 -44.77 -0.05
14 0.1721 -3636.36 -0.31 -45.70 0.14
15 0.3115 -6679.68 0.02 -30.79 -0.00
16 0.3117 -6681.62 0.05 -30.70 0.03
17 0.3333 -6933.40 -0.03 -24.97 -0.09
18 0.8873 4762.41 0.07 -26.05 0.01
19 0.8901 4789.67 0.01 -27.33 0.02
20 0.9749 4956.75 -0.13 -67.46 0.11
21 1.0513 4027.97 -0.04 -99.20 0.02
22 1.0622 3825.02 -0.05 -103.09 -0.12
23 1.0622 3824.83 -0.03 -102.92 0.05
24 1.2259 -210.05 0.03 -125.06 -0.02
25 1.2314 -342.55 -0.02 -124.49 0.08
26 1.2316 -345.72 0.14 -124.69 -0.16
27 1.3026 -1779.89 0.07 -111.84 0.17
28 1.3054 -1823.02 -0.12 -111.17 0.13
29 1.4531 -2054.37 0.06 -64.01 -0.10
30 2.0398 8999.38 -0.06 -174.11 0.03
31 2.3378 2520.84 0.01 -181.03 -0.04
32 3.9648 19203.65 -0.04 -298.56 0.03
33 4.0549 18316.02 0.08 -338.95 -0.12
34 4.0551 18312.10 -0.08 -338.86 0.02
35 4.0684 18072.23 -0.03 -343.80 -0.11
36 4.0686 18069.58 0.10 -343.56 0.15
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.
13SW100 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.958 42.966 42.951 ecceobj 0.017 0.018 0.017 incobj 1.216 1.216 1.216 qmin 41.097 41.195 41.104 qmax 44.463 44.481 44.421 amean 42.718 42.725 42.710 amin 42.398 42.398 42.383 amax 43.049 43.047 43.039 emean 0.018 0.018 0.018 emin 0.000 0.000 0.000 emax 0.033 0.034 0.033 imean 2.357 2.353 2.360 imin 1.130 1.129 1.129 imax 3.151 3.144 3.159 excite_mean 0.045 0.045 0.045 fracstop 1.000 1.000 1.000 cjmean 3.084 3.084 3.084 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 183.0 182.9 183.3 kozaiamp 180.0 180.0 180.0