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: 16WY85 # Created Wed Mar 26 01:11:03 2025 # Orbit generated from Bernstein formalism # Fitting 54 observations of 54 # Arc: 2.97y # First observation: 2014/02/11 # Last observation: 2017/02/01 Preliminary a, adot, b, bdot, g, gdot: -0.000674 0.031112 0.000066 0.001351 0.026601 0.000000 # Chi-squared of fit: 23.10 DOF: 102 RMS: 0.12 # Min/Max residuals: -0.34 0.37 # Exact a, adot, b, bdot, g, gdot: 1.807326E-05 3.092411E-02 1.144582E-06 1.354298E-03 2.795188E-02 7.170122E-05 # Covariance matrix: 1.9513E-13 -2.0968E-13 -2.2358E-16 -9.7247E-15 3.2966E-14 -1.1857E-12 -2.0968E-13 3.5293E-13 -3.7814E-15 1.9986E-14 -1.0472E-14 2.6400E-12 -2.2358E-16 -3.7814E-15 1.1152E-13 -5.1692E-14 -9.0503E-15 -6.9250E-14 -9.7247E-15 1.9986E-14 -5.1692E-14 3.3107E-14 -9.0890E-17 1.6667E-13 3.2966E-14 -1.0472E-14 -9.0503E-15 -9.0890E-17 1.2252E-13 4.2210E-13 -1.1857E-12 2.6400E-12 -6.9250E-14 1.6667E-13 4.2210E-13 2.3821E-11 # lat0 lon0 xBary yBary zBary JD0 -14.342330 137.721550 -0.077027 -0.243027 -0.951078 2456699.672178 # Heliocentric elements and errors Epoch: 2456690.5000 = 2014/02/02 Mean Anomaly: 1.78689 +/- 0.052 Argument of Peri: 277.66188 +/- 0.070 Long of Asc Node: 217.40626 +/- 0.001 Inclination: 14.18763 +/- 0.000 Eccentricity: 0.14565616 +/- 0.0001 Semi-Major Axis: 42.98701145 +/- 0.0036 Time of Perihelion: 2456179.5244 +/- 14.8 Perihelion: 36.72568859 +/- 0.0042 Aphelion: 49.24833431 +/- 0.0050 Period (y) 281.8474 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -26.42472723 +/- 0.0003 Ecliptic Y 23.92256211 +/- 0.0003 Ecliptic Z -8.86219477 +/- 0.0001 Ecliptic XDOT -0.00207291 +/- 0.0000 Ecliptic YDOT -0.00221720 +/- 0.0000 Ecliptic ZDOT 0.00012691 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.73001066 +/- 0.0003 Geocenter to KBO 35.77576827 +/- 0.0004 # Hcoef: 7.95
The following table shows the complete astrometric record for 16WY85. 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 (16WY85) followed by the observatory code and reference code for the source of the astrometry.
2014 02 11.171400 09 03 17.534 +01 49 58.33 22.2z 16WY85 W84 C~8if3 2014 03 21.172626 09 00 29.126 +02 09 37.26 23.1i 16WY85 W84 C~8if3 2014 03 21.175047 09 00 29.119 +02 09 37.33 23.2i 16WY85 W84 C~8if3 2014 03 21.177465 09 00 29.114 +02 09 37.22 23.1i 16WY85 W84 C~8if3 2014 03 22.046633 09 00 26.354 +02 10 05.63 22.8i 16WY85 W84 C~8if3 2014 03 22.051451 09 00 26.340 +02 10 05.74 23.0i 16WY85 W84 C~8if3 2014 03 22.163186 09 00 25.973 +02 10 09.41 23.4r 16WY85 W84 C~8if3 2014 03 22.165607 09 00 25.975 +02 10 09.62 23.5r 16WY85 W84 C~8if3 2014 03 22.168038 09 00 25.956 +02 10 09.62 23.2r 16WY85 W84 C~8if3 2015 01 21.44452 09 11 59.98 +01 15 18.2 23.2i 16WY85 T09 C~8if3 2015 01 21.46239 09 11 59.91 +01 15 18.3 23.1i 16WY85 T09 C~8if3 2015 01 21.47876 09 11 59.83 +01 15 18.7 23.3i 16WY85 T09 C~8if3 2015 01 21.53742 09 11 59.52 +01 15 19.7 23.1i 16WY85 T09 C~8if3 2015 03 18.34172 09 07 29.98 +01 41 10.0 23.5r 16WY85 T09 C~8if3 2015 03 18.36978 09 07 29.87 +01 41 10.7 23.4r 16WY85 T09 C~8if3 2015 03 18.38297 09 07 29.83 +01 41 11.2 23.5r 16WY85 T09 C~8if3 2015 03 25.39153 09 07 06.66 +01 45 02.8 24.6g 16WY85 T09 C~8if3 2015 03 25.40010 09 07 06.62 +01 45 03.3 24.5g 16WY85 T09 C~8if3 2015 03 25.41720 09 07 06.58 +01 45 03.7 24.7g 16WY85 T09 C~8if3 2015 03 25.42793 09 07 06.53 +01 45 04.0 24.5g 16WY85 T09 C~8if3 2015 03 25.43008 09 07 06.53 +01 45 04.0 24.7g 16WY85 T09 C~8if3 2015 11 08.55711 09 21 43.70 +00 57 23.3 23.9r 16WY85 T09 C~8if3 2015 11 08.56993 09 21 43.72 +00 57 22.8 24.4r 16WY85 T09 C~8if3 2015 11 08.57627 09 21 43.73 +00 57 22.7 23.8r 16WY85 T09 C~8if3 2015 11 08.59330 09 21 43.77 +00 57 22.3 23.8r 16WY85 T09 C~8if3 2015 11 08.61461 09 21 43.78 +00 57 21.5 23.8r 16WY85 T09 C~8if3 2015 11 08.64203 09 21 43.81 +00 57 20.8 23.7r 16WY85 T09 C~8if3 2015 11 08.64630 09 21 43.82 +00 57 20.6 24.0r 16WY85 T09 C~8if3 2015 11 10.58979 09 21 46.06 +00 56 24.5 23.5i 16WY85 T09 C~8if3 2015 11 10.61272 09 21 46.10 +00 56 23.7 24.8i 16WY85 T09 C~8if3 2015 11 14.58724 09 21 49.42 +00 54 34.2 24.7g 16WY85 T09 C~8if3 2015 11 14.60004 09 21 49.43 +00 54 34.0 24.9g 16WY85 T09 C~8if3 2015 11 14.60647 09 21 49.43 +00 54 34.0 25.2g 16WY85 T09 C~8if4 2015 11 14.62376 09 21 49.46 +00 54 33.3 25.2g 16WY85 T09 C~8if4 2015 11 14.63858 09 21 49.46 +00 54 33.0 24.5g 16WY85 T09 C~8if4 2016 01 09.45763 09 19 49.63 +00 45 40.8 22.6y 16WY85 T09 C~8if4 2016 01 09.47342 09 19 49.56 +00 45 41.1 22.6y 16WY85 T09 C~8if4 2016 01 09.47880 09 19 49.53 +00 45 41.1 22.8y 16WY85 T09 C~8if4 2016 01 09.52549 09 19 49.33 +00 45 41.3 22.8y 16WY85 T09 C~8if4 2016 01 09.57457 09 19 49.10 +00 45 41.6 22.9y 16WY85 T09 C~8if4 2016 11 28.52196 09 28 30.40 +00 22 27.4 23.4r 16WY85 T09 C~85Ik 2016 11 28.55492 09 28 30.38 +00 22 26.8 23.7r 16WY85 T09 C~85Ik 2016 11 28.56332 09 28 30.37 +00 22 26.3 23.9r 16WY85 T09 C~85Ik 2016 11 28.61822 09 28 30.33 +00 22 25.4 23.9r 16WY85 T09 C~85Ik 2016 11 28.63097 09 28 30.32 +00 22 25.1 24.0r 16WY85 T09 C~85Ik 2016 11 29.50349 09 28 29.63 +00 22 08.8 23.1i 16WY85 T09 C~85Ik 2016 11 29.62468 09 28 29.52 +00 22 06.6 23.6z 16WY85 T09 C~85Ik 2016 11 29.62736 09 28 29.51 +00 22 06.6 23.5z 16WY85 T09 C~85Ik 2016 11 29.63275 09 28 29.51 +00 22 06.6 23.5z 16WY85 T09 C~85Ik 2016 11 29.64147 09 28 29.49 +00 22 06.3 23.0z 16WY85 T09 C~85Ik 2017 02 01.49516 09 24 43.81 +00 24 54.7 23.0i 16WY85 T09 C~85Ik 2017 02 01.50344 09 24 43.77 +00 24 55.1 23.1i 16WY85 T09 C~85Ik 2017 02 01.53643 09 24 43.59 +00 24 55.7 22.9i 16WY85 T09 C~85Ik 2017 02 01.54461 09 24 43.54 +00 24 55.9 23.1i 16WY85 T09 C~85Ik
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 -0.12 0.00 -0.08
2 0.1040 -2759.89 0.01 383.87 0.04
3 0.1040 -2760.01 0.03 383.91 0.03
4 0.1041 -2760.05 0.13 383.78 -0.13
5 0.1064 -2807.95 0.03 398.77 0.00
6 0.1064 -2808.19 0.07 398.81 -0.04
7 0.1068 -2814.52 -0.03 400.70 -0.02
8 0.1068 -2814.56 0.07 400.91 0.15
9 0.1068 -2814.83 -0.07 400.83 0.02
10 0.9426 8103.00 -0.34 323.41 0.00
11 0.9426 8101.97 0.04 323.19 -0.09
12 0.9427 8100.70 0.06 323.22 0.05
13 0.9428 8095.96 -0.04 322.80 0.04
14 1.0956 3772.92 0.01 610.74 0.14
15 1.0957 3771.14 -0.02 610.93 -0.11
16 1.0957 3770.42 0.08 611.23 -0.01
17 1.1149 3370.05 0.11 730.06 -0.01
18 1.1149 3369.33 -0.15 730.36 0.14
19 1.1150 3368.64 0.08 730.56 0.04
20 1.1150 3367.83 -0.14 730.63 -0.08
21 1.1150 3367.83 -0.03 730.63 -0.12
22 1.7396 16816.57 -0.18 1891.56 0.02
23 1.7396 16817.00 -0.07 1891.17 -0.08
24 1.7396 16817.18 -0.06 1891.12 0.01
25 1.7397 16817.87 0.19 1890.91 0.20
26 1.7397 16818.26 0.02 1890.19 -0.03
27 1.7398 16818.90 -0.04 1889.66 0.06
28 1.7398 16819.10 0.05 1889.51 0.01
29 1.7452 16868.12 -0.15 1845.75 0.11
30 1.7452 16868.94 0.15 1845.16 0.05
31 1.7561 16949.45 0.10 1755.06 -0.13
32 1.7561 16949.65 0.10 1754.91 0.02
33 1.7562 16949.65 -0.00 1754.91 0.17
34 1.7562 16950.29 0.37 1754.37 0.03
35 1.7562 16950.38 0.23 1754.09 0.09
36 1.9091 15381.51 -0.10 709.88 -0.11
37 1.9091 15380.42 -0.12 709.86 0.05
38 1.9091 15379.98 -0.19 709.72 -0.02
39 1.9093 15377.04 0.05 709.02 -0.17
40 1.9094 15373.64 -0.02 708.29 -0.34
41 2.7963 23325.47 -0.28 1699.91 0.12
42 2.7964 23325.36 -0.18 1699.25 0.18
43 2.7964 23325.36 -0.12 1698.72 -0.16
44 2.7966 23325.05 -0.06 1697.68 0.01
45 2.7966 23325.00 -0.03 1697.34 -0.05
46 2.7990 23319.87 0.05 1678.59 0.00
47 2.7993 23318.94 0.11 1675.98 0.05
48 2.7993 23318.79 -0.01 1675.93 0.07
49 2.7993 23318.79 0.03 1675.93 0.18
50 2.7994 23318.59 -0.09 1675.56 -0.00
51 2.9742 19999.02 0.16 827.49 -0.16
52 2.9742 19998.33 0.16 827.69 0.07
53 2.9743 19995.54 0.12 827.47 -0.10
54 2.9743 19994.76 0.02 827.43 -0.11
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.
16WY85 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 42.809 42.820 42.797 ecceobj 0.141 0.141 0.141 incobj 14.177 14.177 14.177 qmin 36.007 36.036 36.002 qmax 49.721 49.784 49.708 amean 42.733 42.745 42.722 amin 42.371 42.381 42.355 amax 43.136 43.157 43.111 emean 0.135 0.135 0.135 emin 0.120 0.118 0.118 emax 0.154 0.155 0.154 imean 15.452 15.469 15.453 imin 14.726 14.759 14.719 imax 16.272 16.268 16.281 excite_mean 0.299 0.299 0.299 fracstop 1.000 1.000 1.000 cjmean 2.980 2.980 2.980 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 177.5 177.9 177.7 kozaiamp 180.0 180.0 180.0