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: 16YB39 # Created Tue Apr 1 01:11:00 2025 # Orbit generated from Bernstein formalism # Fitting 40 observations of 40 # Arc: 1.30y # First observation: 2016/12/25 # Last observation: 2018/04/13 Preliminary a, adot, b, bdot, g, gdot: -0.000080 0.024188 -0.000024 -0.008670 0.024416 0.000000 # Chi-squared of fit: 22.30 DOF: 74 RMS: 0.13 # Min/Max residuals: -0.30 0.33 # Exact a, adot, b, bdot, g, gdot: 1.548626E-05 2.407644E-02 -5.085918E-06 -8.718545E-03 2.437196E-02 7.439817E-03 # Covariance matrix: 1.5104E-13 8.6148E-14 2.2573E-14 -1.1670E-13 2.1365E-13 9.8448E-12 8.6148E-14 6.8753E-13 5.7661E-14 -3.6994E-13 4.3557E-13 3.1430E-11 2.2573E-14 5.7661E-14 6.4398E-14 -1.2316E-13 6.0661E-14 4.2461E-12 -1.1670E-13 -3.6994E-13 -1.2316E-13 6.0495E-13 -3.4894E-13 -2.8892E-11 2.1365E-13 4.3557E-13 6.0661E-14 -3.4894E-13 5.1998E-13 2.9546E-11 9.8448E-12 3.1430E-11 4.2461E-12 -2.8892E-11 2.9546E-11 2.4588E-09 # lat0 lon0 xBary yBary zBary JD0 -10.222478 151.850501 0.838540 -0.092270 -0.512767 2457748.016489 # Heliocentric elements and errors Epoch: 2457740.5000 = 2016/12/18 Mean Anomaly: 29.19035 +/- 0.079 Argument of Peri: 147.02905 +/- 0.167 Long of Asc Node: 305.00313 +/- 0.001 Inclination: 22.33028 +/- 0.001 Eccentricity: 0.36189094 +/- 0.0020 Semi-Major Axis: 56.35232447 +/- 0.0966 Time of Perihelion: 2445211.8858 +/- 11.2 Perihelion: 35.95892858 +/- 0.1288 Aphelion: 76.74572037 +/- 0.1735 Period (y) 423.0347 +/- 1.09 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -35.67078926 +/- 0.0010 Ecliptic Y 20.03064288 +/- 0.0006 Ecliptic Z -7.28200838 +/- 0.0002 Ecliptic XDOT -0.00184538 +/- 0.0000 Ecliptic YDOT -0.00208543 +/- 0.0000 Ecliptic ZDOT -0.00111224 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.55309262 +/- 0.0009 Geocenter to KBO 41.03075854 +/- 0.0012 # Hcoef: 8.67
The following table shows the complete astrometric record for 16YB39. 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 (16YB39) followed by the observatory code and reference code for the source of the astrometry.
2016 12 25.51570 10 00 52.57 +01 15 08.4 24.9r 16YB39 T09 C~7gus 2016 12 25.54616 10 00 52.50 +01 15 08.1 25.0r 16YB39 T09 C~7gus 2016 12 25.59037 10 00 52.39 +01 15 08.1 25.1i 16YB39 T09 C~7gus 2016 12 25.61625 10 00 52.32 +01 15 07.7 25.0i 16YB39 T09 C~7gus 2017 01 02.59458 10 00 29.85 +01 14 44.6 25.5g 16YB39 T09 C~7gus 2017 01 02.60880 10 00 29.81 +01 14 44.8 25.4g 16YB39 T09 C~7gus 2017 01 02.62547 10 00 29.73 +01 14 44.8 25.6g 16YB39 T09 C~7gus 2017 01 23.36572 09 59 11.88 +01 16 32.3 24.7r 16YB39 T09 C~7n2w 2017 01 23.41253 09 59 11.67 +01 16 32.8 25.0r 16YB39 T09 C~7n2w 2017 01 23.42951 09 59 11.60 +01 16 32.9 24.5r 16YB39 T09 C~7n2w 2017 01 23.48266 09 59 11.38 +01 16 33.4 24.6i 16YB39 T09 C~7n2w 2017 01 23.52648 09 59 11.18 +01 16 33.9 24.7i 16YB39 T09 C~7n2w 2017 01 30.41352 09 58 40.65 +01 17 59.0 24.8i 16YB39 T09 C~7n2w 2017 01 30.50184 09 58 40.25 +01 18 00.1 24.4z 16YB39 T09 C~7n2w 2017 01 30.59058 09 58 39.83 +01 18 01.3 24.7z 16YB39 T09 C~7n2w 2017 01 30.61243 09 58 39.72 +01 18 01.6 25.3z 16YB39 T09 C~7n2w 2017 02 21.32404 09 56 57.08 +01 24 34.4 24.7z 16YB39 T09 C~7gus 2017 02 21.34959 09 56 56.96 +01 24 34.7 24.1z 16YB39 T09 C~7gus 2017 02 21.37516 09 56 56.84 +01 24 35.2 24.5z 16YB39 T09 C~7gus 2017 02 21.42282 09 56 56.61 +01 24 36.2 24.3z 16YB39 T09 C~7gus 2017 02 23.33356 09 56 47.51 +01 25 17.6 25.6g 16YB39 T09 C~7gus 2017 02 23.46720 09 56 46.88 +01 25 20.6 25.1r 16YB39 T09 C~7gus 2017 02 23.48087 09 56 46.81 +01 25 20.9 25.1r 16YB39 T09 C~7gus 2017 02 23.49450 09 56 46.73 +01 25 21.3 24.9r 16YB39 T09 C~7gus 2017 02 23.51193 09 56 46.65 +01 25 21.6 24.9r 16YB39 T09 C~7gus 2017 03 04.26703 09 56 05.86 +01 28 41.1 23.8z 16YB39 T09 C~7gus 2017 03 04.29255 09 56 05.75 +01 28 41.9 24.5z 16YB39 T09 C~7gus 2017 03 04.31803 09 56 05.65 +01 28 42.3 24.3z 16YB39 T09 C~7gus 2017 03 04.34360 09 56 05.51 +01 28 42.8 24.3z 16YB39 T09 C~7gus 2017 03 04.45601 09 56 05.00 +01 28 45.8 24.5i 16YB39 T09 C~7gus 2017 03 04.47782 09 56 04.90 +01 28 46.1 24.6i 16YB39 T09 C~7gus 2017 03 04.49952 09 56 04.78 +01 28 46.6 24.3i 16YB39 T09 C~7gus 2017 04 27.329540 09 53 18.76 +01 48 25.1 16YB39 T09 C~81Bh 2017 04 27.332415 09 53 18.76 +01 48 25.2 16YB39 T09 C~81Bh 2018 01 17.45108 10 04 06.19 +00 18 27.7 24.7i 16YB39 T09 C~83Ek 2018 01 17.51028 10 04 05.94 +00 18 28.4 24.7i 16YB39 T09 C~83Ek 2018 01 17.53731 10 04 05.85 +00 18 28.5 24.4i 16YB39 T09 C~83Ek 2018 01 17.57223 10 04 05.70 +00 18 28.4 24.3i 16YB39 T09 C~83Ek 2018 04 13.355488 09 58 12.40 +00 47 10.3 16YB39 T09 C~83Ek 2018 04 13.401360 09 58 12.28 +00 47 11.1 16YB39 T09 C~83Ek
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 0.03 0.00 -0.12
2 0.0001 -0.88 0.20 -0.65 -0.20
3 0.0002 -2.42 0.18 -1.23 0.04
4 0.0003 -3.27 0.23 -1.97 -0.22
5 0.0221 -310.72 0.15 -141.81 -0.08
6 0.0222 -311.35 0.16 -141.83 0.14
7 0.0222 -312.47 -0.22 -142.25 0.01
8 0.0790 -1443.51 -0.12 -451.04 0.11
9 0.0791 -1446.64 -0.20 -451.68 0.08
10 0.0792 -1447.66 -0.11 -451.95 0.03
11 0.0793 -1450.92 0.09 -452.64 0.03
12 0.0794 -1453.90 -0.03 -453.23 0.02
13 0.0983 -1912.54 -0.23 -534.07 0.12
14 0.0985 -1918.55 -0.06 -535.14 0.05
15 0.0988 -1924.87 -0.17 -536.23 -0.04
16 0.0988 -1926.52 -0.30 -536.52 -0.09
17 0.1583 -3506.01 -0.12 -708.21 0.33
18 0.1583 -3507.80 0.02 -708.56 0.11
19 0.1584 -3509.66 0.10 -708.73 0.09
20 0.1585 -3513.24 0.12 -709.00 0.07
21 0.1638 -3655.60 -0.10 -718.05 -0.10
22 0.1641 -3665.50 0.09 -718.55 0.04
23 0.1642 -3666.59 0.03 -718.64 0.02
24 0.1642 -3667.86 -0.21 -718.68 0.04
25 0.1643 -3669.09 -0.12 -718.82 -0.02
26 0.1882 -4312.11 -0.03 -746.31 -0.16
27 0.1883 -4313.94 0.01 -746.14 0.07
28 0.1884 -4315.48 0.33 -746.29 -0.02
29 0.1884 -4317.63 0.06 -746.56 -0.23
30 0.1887 -4325.84 0.09 -746.43 0.16
31 0.1888 -4327.35 0.18 -746.67 -0.03
32 0.1889 -4329.22 -0.09 -746.83 -0.14
33 0.3362 -7075.70 0.00 -514.64 -0.09
34 0.3363 -7075.73 0.03 -514.55 -0.02
35 1.0621 3913.31 0.09 -2165.70 -0.07
36 1.0623 3909.55 -0.20 -2166.36 0.15
37 1.0623 3908.25 0.09 -2166.74 0.17
38 1.0624 3906.17 0.06 -2167.63 -0.20
39 1.2973 -1661.18 0.02 -2414.13 0.08
40 1.2974 -1663.15 -0.04 -2414.02 -0.13
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.
16YB39 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 56.268 56.561 55.981 ecceobj 0.364 0.369 0.358 incobj 22.339 22.340 22.338 qmin 34.331 34.267 34.530 qmax 78.875 79.926 78.296 amean 56.041 56.503 55.915 amin 55.307 55.832 55.250 amax 57.058 57.391 56.710 emean 0.366 0.371 0.362 emin 0.347 0.352 0.343 emax 0.385 0.393 0.381 imean 23.424 23.543 23.511 imin 22.540 22.695 22.690 imax 24.339 24.361 24.365 excite_mean 0.540 0.545 0.539 fracstop 1.000 1.000 1.000 cjmean 2.867 2.864 2.868 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 184.1 181.7 180.3 kozaiamp 180.0 180.0 180.0