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: 16QP85 # Created Tue Apr 1 01:10:50 2025 # Orbit generated from Bernstein formalism # Fitting 70 observations of 70 # Arc: 3.31y # First observation: 2014/09/24 # Last observation: 2018/01/16 Preliminary a, adot, b, bdot, g, gdot: -0.000078 0.029544 0.000009 0.000451 0.025799 0.000000 # Chi-squared of fit: 62.05 DOF: 134 RMS: 0.17 # Min/Max residuals: -0.41 0.38 # Exact a, adot, b, bdot, g, gdot: 1.869338E-05 2.942955E-02 1.144070E-06 4.640349E-04 2.560129E-02 -3.802135E-04 # Covariance matrix: 2.9660E-13 -2.2035E-13 3.2851E-15 -3.3777E-15 -7.3436E-14 -1.4401E-12 -2.2035E-13 3.2005E-13 -7.0795E-15 7.2512E-15 1.4205E-13 3.0325E-12 3.2851E-15 -7.0795E-15 2.2971E-13 -8.2067E-14 -2.1977E-15 -7.9236E-14 -3.3777E-15 7.2512E-15 -8.2067E-14 3.2333E-14 2.3904E-15 8.0654E-14 -7.3436E-14 1.4205E-13 -2.1977E-15 2.3904E-15 1.2526E-13 1.2969E-12 -1.4401E-12 3.0325E-12 -7.9236E-14 8.0654E-14 1.2969E-12 3.2658E-11 # lat0 lon0 xBary yBary zBary JD0 -15.931175 34.683188 0.559442 -0.229236 -0.803654 2456924.792788 # Heliocentric elements and errors Epoch: 2456920.5000 = 2014/09/20 Mean Anomaly: 356.90666 +/- 0.021 Argument of Peri: 278.91454 +/- 0.044 Long of Asc Node: 121.41738 +/- 0.001 Inclination: 15.61380 +/- 0.000 Eccentricity: 0.33525584 +/- 0.0000 Semi-Major Axis: 59.87536813 +/- 0.0040 Time of Perihelion: 2458374.6073 +/- 9.8 Perihelion: 39.80180137 +/- 0.0036 Aphelion: 79.94893490 +/- 0.0059 Period (y) 463.3194 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 31.88898027 +/- 0.0004 Ecliptic Y 21.39070825 +/- 0.0003 Ecliptic Z -10.72141712 +/- 0.0001 Ecliptic XDOT -0.00181651 +/- 0.0000 Ecliptic YDOT 0.00256894 +/- 0.0000 Ecliptic ZDOT 0.00005899 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.86750867 +/- 0.0004 Geocenter to KBO 39.06052643 +/- 0.0005 # Hcoef: 7.34
The following table shows the complete astrometric record for 16QP85. 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 (16QP85) followed by the observatory code and reference code for the source of the astrometry.
2014 09 24.29201 02 30 48.754 -01 57 30.67 24.6g 16QP85 W84 C~4ybM 2014 10 21.31854 02 28 56.632 -02 11 01.59 23.1i 16QP85 W84 C~4ybM 2014 10 29.29448 02 28 19.087 -02 14 22.46 23.4r 16QP85 W84 C~4ybM 2014 12 24.13625 02 24 35.525 -02 21 38.90 23.1i 16QP85 W84 C~4ybM 2016 08 25.292269 02 44 31.89 -00 33 41.2 23.1i 16QP85 W84 C~2B0K 2016 08 25.296250 02 44 31.90 -00 33 41.1 23.1z 16QP85 W84 C~2B0K 2016 08 26.279757 02 44 31.01 -00 34 07.3 23.7r 16QP85 W84 C~2B0K 2016 08 26.282106 02 44 31.01 -00 34 07.6 23.0i 16QP85 W84 C~2B0K 2016 08 26.286088 02 44 31.00 -00 34 07.6 23.2z 16QP85 W84 C~2B0K 2016 09 02.266343 02 44 22.20 -00 37 22.2 23.8r 16QP85 W84 C~2B0K 2016 09 02.268704 02 44 22.20 -00 37 22.5 23.1i 16QP85 W84 C~2B0K 2016 09 02.275324 02 44 22.21 -00 37 22.5 23.1z 16QP85 W84 C~2B0K 2016 09 12.268079 02 44 02.18 -00 42 19.2 22.9z 16QP85 W84 C~2B0K 2016 09 22.308669 02 43 34.01 -00 47 28.7 23.6r 16QP85 W84 C~2B0K 2016 09 22.311019 02 43 34.00 -00 47 28.7 23.1i 16QP85 W84 C~2B0K 2016 09 22.317639 02 43 33.98 -00 47 28.7 23.1z 16QP85 W84 C~2B0K 2016 09 24.28330 02 43 27.633 -00 48 30.09 23.5r 16QP85 W84 C~4ybM 2016 10 02.309977 02 42 58.94 -00 52 37.4 23.5r 16QP85 W84 C~2B0K 2016 10 02.312338 02 42 58.94 -00 52 37.7 23.0i 16QP85 W84 C~2B0K 2016 10 02.316319 02 42 58.91 -00 52 37.6 22.8z 16QP85 W84 C~2B0K 2016 10 09.127118 02 42 31.72 -00 56 02.6 22.8i 16QP85 W84 C~2B0K 2016 10 27.157928 02 41 10.63 -01 04 13.5 23.5r 16QP85 W84 C~2B0K 2016 10 27.160289 02 41 10.62 -01 04 13.5 23.1i 16QP85 W84 C~2B0K 2016 10 27.166910 02 41 10.59 -01 04 13.7 22.8z 16QP85 W84 C~2B0K 2016 10 27.220937 02 41 10.33 -01 04 15.2 23.7r 16QP85 W84 C~2B0K 2016 10 27.22094 02 41 10.343 -01 04 15.44 23.7r 16QP85 W84 C~4ybM 2016 10 27.25910 02 41 10.150 -01 04 16.31 22.9i 16QP85 W84 C~4ybM 2016 11 03.098044 02 40 37.45 -01 06 53.0 22.8i 16QP85 W84 C~2B0K 2016 11 03.102037 02 40 37.44 -01 06 53.0 22.7z 16QP85 W84 C~2B0K 2016 12 05.18660 02 38 12.268 -01 13 50.39 23.5i 16QP85 W84 C~4ybM 2017 09 14.243120 02 50 16.665 -00 08 36.09 23.7r 16QP85 W84 C~2g4h 2017 09 14.245469 02 50 16.675 -00 08 36.13 23.0i 16QP85 W84 C~2g4h 2017 09 14.248108 02 50 16.670 -00 08 36.30 22.9z 16QP85 W84 C~2g4h 2017 09 25.294323 02 49 45.003 -00 14 11.43 23.3r 16QP85 W84 C~2g4h 2017 09 25.296696 02 49 45.000 -00 14 11.50 23.1i 16QP85 W84 C~2g4h 2017 09 25.299335 02 49 44.978 -00 14 11.58 22.9z 16QP85 W84 C~2g4h 2017 10 02.196846 02 49 20.886 -00 17 40.77 22.6i 16QP85 W84 C~2g4h 2017 10 14.271152 02 48 32.121 -00 23 35.19 23.6r 16QP85 W84 C~2g4h 2017 10 14.273513 02 48 32.132 -00 23 35.18 23.1i 16QP85 W84 C~2g4h 2017 10 14.276152 02 48 32.093 -00 23 35.40 22.8z 16QP85 W84 C~2g4h 2017 10 19.257350 02 48 10.062 -00 25 52.70 24.3g 16QP85 W84 C~2g4h 2017 10 19.259566 02 48 10.060 -00 25 53.16 23.6r 16QP85 W84 C~2g4h 2017 10 19.261904 02 48 10.057 -00 25 53.31 23.0i 16QP85 W84 C~2g4h 2017 10 19.264566 02 48 10.026 -00 25 53.27 22.8z 16QP85 W84 C~2g4h 2017 10 26.209624 02 47 37.965 -00 28 53.27 23.0i 16QP85 W84 C~2g4h 2017 10 26.212275 02 47 37.962 -00 28 53.19 22.7z 16QP85 W84 C~2g4h 2017 10 26.274346 02 47 37.664 -00 28 54.79 23.4r 16QP85 W84 C~2g4h 2017 10 26.276696 02 47 37.641 -00 28 54.70 23.2i 16QP85 W84 C~2g4h 2017 10 26.279337 02 47 37.635 -00 28 55.02 22.8z 16QP85 W84 C~2g4h 2017 10 29.28689 02 47 23.419 -00 30 07.78 23.6r 16QP85 W84 C~4ybM 2017 11 14.180423 02 46 07.159 -00 35 28.72 23.5r 16QP85 W84 C~2g4h 2017 11 14.182795 02 46 07.147 -00 35 28.82 22.9i 16QP85 W84 C~2g4h 2017 11 14.185434 02 46 07.131 -00 35 28.70 22.9z 16QP85 W84 C~2g4h 2017 11 19.201048 02 45 43.463 -00 36 44.31 23.5r 16QP85 W84 C~2g4h 2017 11 19.203409 02 45 43.447 -00 36 44.40 23.1i 16QP85 W84 C~2g4h 2017 11 19.206048 02 45 43.419 -00 36 44.32 22.8z 16QP85 W84 C~2g4h 2017 11 22.17853 02 45 29.699 -00 37 22.90 22.9i 16QP85 W84 C~4ybM 2017 11 25.179080 02 45 16.061 -00 37 56.18 23.2i 16QP85 W84 C~2g4h 2017 12 20.26766 02 43 38.969 -00 38 59.51 23.6R 16QP85 G37 C~4O8a 2017 12 20.34405 02 43 38.719 -00 38 59.04 16QP85 G37 C~4O8a 2017 12 26.093652 02 43 22.273 -00 38 16.16 23.6r 16QP85 W84 C~2g4h 2017 12 26.096013 02 43 22.269 -00 38 16.21 23.3i 16QP85 W84 C~2g4h 2017 12 26.098653 02 43 22.253 -00 38 16.08 22.9z 16QP85 W84 C~2g4h 2018 01 04.119763 02 43 01.947 -00 36 26.54 23.1i 16QP85 W84 C~2g4h 2018 01 04.122425 02 43 01.951 -00 36 26.39 23.2z 16QP85 W84 C~2g4h 2018 01 11.100446 02 42 51.181 -00 34 27.55 23.0i 16QP85 W84 C~2g4i 2018 01 11.103096 02 42 51.172 -00 34 27.41 22.8z 16QP85 W84 C~2g4i 2018 01 16.092147 02 42 46.290 -00 32 44.47 23.7r 16QP85 W84 C~2g4i 2018 01 16.094485 02 42 46.283 -00 32 44.44 23.2i 16QP85 W84 C~2g4i 2018 01 16.097124 02 42 46.292 -00 32 44.32 22.9z 16QP85 W84 C~2g4i
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 -0.18
2 0.0740 -1853.59 -0.10 -216.45 -0.16
3 0.0958 -2451.15 0.15 -222.28 -0.41
4 0.2487 -5762.06 0.09 459.79 -0.07
5 1.9192 13329.11 -0.15 703.11 -0.17
6 1.9192 13329.28 0.12 703.15 -0.04
7 1.9219 13307.98 0.06 682.75 0.18
8 1.9219 13307.88 0.01 682.47 -0.06
9 1.9220 13307.73 -0.04 682.51 0.07
10 1.9411 13118.35 0.01 541.78 0.24
11 1.9411 13118.25 -0.01 541.49 0.00
12 1.9411 13118.39 0.35 541.44 0.08
13 1.9684 12735.65 0.22 359.54 0.01
14 1.9959 12233.06 -0.03 205.73 0.05
15 1.9959 12232.92 -0.04 205.78 0.13
16 1.9960 12232.63 0.05 205.88 0.32
17 2.0013 12122.17 0.26 179.13 -0.15
18 2.0233 11632.84 -0.18 86.77 0.35
19 2.0233 11632.74 -0.13 86.49 0.09
20 2.0233 11632.34 -0.26 86.73 0.37
21 2.0420 11178.45 -0.03 26.98 0.10
22 2.0914 9865.11 -0.01 -37.30 0.19
23 2.0914 9864.96 0.03 -37.25 0.24
24 2.0914 9864.47 0.04 -37.29 0.19
25 2.0915 9860.29 -0.01 -37.43 0.02
26 2.0915 9860.39 0.09 -37.72 -0.27
27 2.0916 9857.37 -0.02 -37.59 -0.17
28 2.1104 9341.58 -0.36 -24.53 0.23
29 2.1104 9341.44 -0.20 -24.48 0.27
30 2.1982 7144.42 0.09 296.14 -0.26
31 2.9732 18740.80 0.07 424.65 -0.12
32 2.9732 18740.93 0.31 424.56 -0.17
33 2.9732 18740.81 0.30 424.43 -0.26
34 3.0034 18177.54 0.02 263.41 0.11
35 3.0034 18177.47 0.09 263.36 0.08
36 3.0034 18177.13 -0.10 263.39 0.15
37 3.0223 17763.95 0.16 184.33 0.38
38 3.0554 16950.91 -0.27 89.76 0.11
39 3.0554 16951.07 0.07 89.71 0.08
40 3.0554 16950.44 -0.37 89.70 0.08
41 3.0690 16590.85 -0.07 68.60 0.35
42 3.0690 16590.67 -0.08 68.18 -0.07
43 3.0690 16590.58 -0.00 68.05 -0.19
44 3.0691 16590.15 -0.23 68.24 0.01
45 3.0881 16073.58 -0.19 56.31 -0.02
46 3.0881 16073.57 -0.00 56.40 0.07
47 3.0882 16068.79 -0.04 56.36 0.02
48 3.0883 16068.49 -0.16 56.56 0.21
49 3.0883 16068.30 -0.15 56.29 -0.06
50 3.0965 15841.65 0.10 57.67 -0.15
51 3.1400 14649.39 0.11 130.76 -0.05
52 3.1400 14649.19 0.08 130.72 -0.11
53 3.1400 14649.00 0.09 130.92 0.06
54 3.1538 14287.10 0.17 176.29 0.07
55 3.1538 14286.84 0.08 176.29 0.04
56 3.1538 14286.47 -0.10 176.50 0.22
57 3.1619 14078.46 0.28 207.76 -0.24
58 3.1701 13873.39 0.05 243.63 0.05
59 3.2388 12471.47 0.11 663.06 -0.21
60 3.2390 12468.07 -0.02 664.74 -0.12
61 3.2548 12248.39 -0.10 786.46 -0.22
62 3.2548 12248.32 -0.09 786.44 -0.30
63 3.2548 12248.14 -0.18 786.64 -0.15
64 3.2795 11995.59 0.01 990.46 -0.23
65 3.2795 11995.70 0.17 990.58 -0.17
66 3.2986 11881.79 -0.01 1156.14 -0.33
67 3.2986 11881.70 -0.06 1156.32 -0.22
68 3.3123 11846.24 0.03 1277.80 0.03
69 3.3123 11846.15 -0.05 1277.86 0.03
70 3.3123 11846.32 0.12 1277.93 0.04
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.
16QP85 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 60.640 60.653 60.627 ecceobj 0.343 0.343 0.343 incobj 15.613 15.613 15.613 qmin 39.229 39.205 39.148 qmax 81.504 81.514 81.661 amean 59.828 59.827 59.815 amin 59.143 59.135 59.164 amax 60.688 60.709 60.712 emean 0.329 0.330 0.333 emin 0.316 0.316 0.323 emax 0.343 0.343 0.346 imean 14.521 14.513 14.104 imin 14.031 14.032 13.768 imax 15.075 15.018 14.414 excite_mean 0.414 0.414 0.413 fracstop 1.000 1.000 1.000 cjmean 3.080 3.080 3.081 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 170.0 169.3 186.5 kozaiamp 180.0 180.0 180.0