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: 17DH163 # Created Thu Oct 31 01:10:33 2024 # Orbit generated from Bernstein formalism # Fitting 57 observations of 58 # Arc: 2.11y # First observation: 2016/12/25 # Last observation: 2019/02/05 Preliminary a, adot, b, bdot, g, gdot: 0.000004 0.027759 -0.000003 0.010918 0.027178 0.000000 # Chi-squared of fit: 31.09 DOF: 108 RMS: 0.13 # Min/Max residuals: -0.46 0.33 # Exact a, adot, b, bdot, g, gdot: 1.591624E-05 2.737411E-02 5.303780E-06 1.076664E-02 2.686159E-02 -1.355358E-03 # Covariance matrix: 7.0047E-14 -4.5036E-14 5.3738E-15 -1.1494E-14 8.0937E-14 -6.3102E-13 -4.5036E-14 2.5338E-12 -7.6638E-14 1.1159E-12 6.4842E-13 5.6396E-11 5.3738E-15 -7.6638E-14 3.4187E-14 -6.5598E-14 -1.0146E-14 -1.8439E-12 -1.1494E-14 1.1159E-12 -6.5598E-14 6.7033E-13 2.9426E-13 2.6404E-11 8.0937E-14 6.4842E-13 -1.0146E-14 2.9426E-13 3.6331E-13 1.4762E-11 -6.3102E-13 5.6396E-11 -1.8439E-12 2.6404E-11 1.4762E-11 1.3348E-09 # lat0 lon0 xBary yBary zBary JD0 -10.077722 151.754361 0.837664 -0.091220 -0.514383 2457748.016489 # Heliocentric elements and errors Epoch: 2457740.5000 = 2016/12/18 Mean Anomaly: 340.21277 +/- 0.311 Argument of Peri: 1.91760 +/- 0.455 Long of Asc Node: 174.42014 +/- 0.001 Inclination: 23.34339 +/- 0.001 Eccentricity: 0.16638599 +/- 0.0005 Semi-Major Axis: 44.54583821 +/- 0.0053 Time of Perihelion: 2463709.3637 +/- 93.7 Perihelion: 37.13403480 +/- 0.0245 Aphelion: 51.95764162 +/- 0.0249 Period (y) 297.3164 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -32.35653799 +/- 0.0007 Ecliptic Y 18.32711835 +/- 0.0004 Ecliptic Z -6.51412457 +/- 0.0001 Ecliptic XDOT -0.00136720 +/- 0.0000 Ecliptic YDOT -0.00243807 +/- 0.0000 Ecliptic ZDOT 0.00110457 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.75265073 +/- 0.0006 Geocenter to KBO 37.22787708 +/- 0.0008 # Hcoef: 9.39
The following table shows the complete astrometric record for 17DH163. 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 (17DH163) followed by the observatory code and reference code for the source of the astrometry.
2016 12 25.51570 10 00 43.48 +01 25 15.9 26.2r 17DH163 T09 C~7zpo 2016 12 25.54616 10 00 43.39 +01 25 15.7 26.0r 17DH163 T09 C~7zpo 2016 12 25.57937 10 00 43.32 +01 25 15.9 25.5i 17DH163 T09 C~7zpo 2016 12 25.59037 10 00 43.26 +01 25 16.2 26.0i 17DH163 T09 C~7zpo 2017 01 02.43400 10 00 21.31 +01 26 16.0 24.7z 17DH163 T09 C~7zpo 2017 01 02.49315 10 00 21.13 +01 26 16.2 25.1i 17DH163 T09 C~7zpo 2017 01 02.50080 10 00 21.10 +01 26 16.5 25.0i 17DH163 T09 C~7zpo 2017 01 02.50463 10 00 21.10 +01 26 16.2 24.9i 17DH163 T09 C~7zpo 2017 01 02.51228 10 00 21.07 +01 26 16.5 25.1i 17DH163 T09 C~7zpo 2017 01 02.58611 10 00 20.82 +01 26 17.3 25.9g 17DH163 T09 C~7zpo 2017 01 02.59458 10 00 20.80 +01 26 17.2 25.5g 17DH163 T09 C~7zpo 2017 01 02.60039 10 00 20.78 +01 26 17.4 25.8g 17DH163 T09 C~7zpo 2017 01 02.60880 10 00 20.77 +01 26 17.5 26.0g 17DH163 T09 C~7zpo 2017 01 02.62292 10 00 20.68 +01 26 17.7 25.5g 17DH163 T09 C~7zpo 2017 01 21.41782 09 59 09.50 +01 31 19.5 25.0z 17DH163 T09 C~7zpo 2017 01 21.43628 09 59 09.42 +01 31 20.2 24.7z 17DH163 T09 C~7zpo 2017 01 21.49330 09 59 09.16 +01 31 21.0 24.6z 17DH163 T09 C~7zpo 2017 01 21.49713 09 59 09.15 +01 31 21.4 24.6z 17DH163 T09 C~7zpo 2017 01 21.50822 09 59 09.11 +01 31 21.4 24.5z 17DH163 T09 C~7zpo 2017 01 21.51563 09 59 09.08 +01 31 21.5 24.5z 17DH163 T09 C~7zpo 2017 01 21.51947 09 59 09.05 +01 31 21.9 24.6z 17DH163 T09 C~7zpo 2017 01 21.53429 09 59 08.99 +01 31 22.2 24.1z 17DH163 T09 C~7zpo 2017 01 23.36023 09 59 00.95 +01 32 02.4 25.2r 17DH163 T09 C~7zpo 2017 01 23.37416 09 59 00.91 +01 32 02.9 24.6r 17DH163 T09 C~7zpo 2017 01 23.43372 09 59 00.63 +01 32 04.0 25.3r 17DH163 T09 C~7zpo 2017 01 23.44310 09 59 00.58 +01 32 04.4 25.1r 17DH163 T09 C~7zpo 2017 01 23.48266 09 59 00.41 +01 32 05.2 25.0i 17DH163 T09 C~7zpo 2017 01 23.50215 09 59 00.31 +01 32 05.9 25.0i 17DH163 T09 C~7zpo 2017 01 23.51704 09 59 00.26 +01 32 06.2 25.4i 17DH163 T09 C~7zpo 2017 01 23.52648 09 59 00.21 +01 32 06.2 25.0i 17DH163 T09 C~7zpo 2017 01 23.53190 09 59 00.19 +01 32 06.2 25.0i 17DH163 T09 C~7zpo 2017 01 23.59562 09 58 59.89 +01 32 07.9 24.8i 17DH163 T09 C~7zpo 2017 01 30.41352 09 58 28.55 +01 34 54.9 24.4i 17DH163 T09 C~7zpo 2017 01 30.43553 09 58 28.45 +01 34 55.7 25.3i 17DH163 T09 C~7zpo 2017 01 30.52778 09 58 28.00 +01 34 58.1 24.7z 17DH163 T09 C~7zpo 2017 01 30.56478 09 58 27.82 +01 34 59.2 24.8z 17DH163 T09 C~7zpo 2017 01 30.59058 09 58 27.70 +01 34 59.9 24.4z 17DH163 T09 C~7zpo 2017 02 02.42933 09 58 14.16 +01 36 16.6 25.2r 17DH163 T09 C~7zpo 2017 02 02.43804 09 58 14.11 +01 36 16.8 25.2r 17DH163 T09 C~7zpo 2017 02 02.46755 09 58 13.96 +01 36 17.6 25.3r 17DH163 T09 C~7zpo 2017 02 21.34959 09 56 40.51 +01 46 10.4 24.6z 17DH163 T09 C~7zpo 2017 02 21.37516 09 56 40.36 +01 46 11.2 24.8z 17DH163 T09 C~7zpo 2017 02 21.40083 09 56 40.22 +01 46 12.0 24.1z 17DH163 T09 C~7zpo 2017 02 23.31993 09 56 30.70 +01 47 18.6 26.0g 17DH163 T09 C~7zpo 2017 02 23.46720 09 56 29.95 +01 47 23.8 25.1r 17DH163 T09 C~7zpo 2017 02 23.49450 09 56 29.82 +01 47 24.8 25.4r 17DH163 T09 C~7zpo 2017 02 23.51193 09 56 29.74 +01 47 25.3 25.3r 17DH163 T09 C~7zpo 2017 03 04.29255 09 55 47.12 +01 52 40.2 24.3z 17DH163 T09 C~7zpo 2017 03 04.31803 09 55 47.02 +01 52 41.4 24.4z 17DH163 T09 C~7zpo 2017 03 04.45601 09 55 46.33 +01 52 46.3 25.0i 17DH163 T09 C~7zpo 2017 03 04.47782 09 55 46.21 +01 52 47.3 25.1i 17DH163 T09 C~7zpo 2017 03 22.25015 09 54 28.84 +02 03 46.5 25.7g 17DH163 T09 C~7zpo 2017 03 22.32046 09 54 28.57 +02 03 48.9 25.5g 17DH163 T09 C~7zpo 2017 03 22.33527 09 54 28.51 +02 03 49.7 26.0g 17DH163 T09 C~7zpo 2018 01 17.518288 10 06 15.77 +01 31 29.8 17DH163 T09 C~81Bu 2018 01 17.545345 10 06 15.66 +01 31 30.2 17DH163 T09 C~81Bu 2019 02 05.422693 10 11 43.35 +01 40 37.4 17DH163 T09 C~81Bu 2019 02 05.425366 10 11 43.33 +01 40 37.4 17DH163 T09 C~81Bu
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 0.04 0.00 0.21
2 0.0001 -1.19 -0.01 -0.66 -0.18
3 0.0002 -2.25 0.19 -0.84 -0.07
4 0.0002 -3.19 -0.34 -0.88 -0.01
5 0.0217 -332.42 -0.23 -60.24 0.25
6 0.0218 -335.02 0.05 -60.99 -0.08
7 0.0219 -335.55 -0.11 -60.87 0.10
8 0.0219 -335.44 0.18 -61.15 -0.15
9 0.0219 -335.97 0.03 -61.03 0.03
10 0.0221 -339.76 -0.15 -61.59 0.01
11 0.0221 -340.01 0.02 -61.79 -0.13
12 0.0221 -340.36 -0.05 -61.71 -0.00
13 0.0222 -340.53 0.19 -61.67 0.10
14 0.0222 -341.87 -0.46 -61.95 -0.08
15 0.0737 -1447.31 -0.03 -153.31 -0.04
16 0.0737 -1448.68 -0.11 -153.08 0.25
17 0.0739 -1452.61 -0.05 -153.69 -0.19
18 0.0739 -1452.89 -0.06 -153.37 0.15
19 0.0739 -1453.46 0.15 -153.58 -0.03
20 0.0739 -1453.91 0.22 -153.64 -0.07
21 0.0739 -1454.47 -0.07 -153.43 0.16
22 0.0740 -1455.42 0.02 -153.46 0.17
23 0.0790 -1582.43 -0.11 -158.05 -0.13
24 0.0790 -1583.17 0.14 -157.79 0.16
25 0.0792 -1587.48 0.08 -158.23 -0.13
26 0.0792 -1588.33 -0.09 -158.12 0.01
27 0.0793 -1590.99 0.08 -158.26 -0.04
28 0.0794 -1592.64 -0.17 -158.13 0.15
29 0.0794 -1593.45 0.10 -158.11 0.20
30 0.0794 -1594.15 0.07 -158.38 -0.04
31 0.0794 -1594.43 0.18 -158.48 -0.13
32 0.0796 -1599.24 -0.06 -158.46 0.05
33 0.0983 -2097.93 0.12 -166.67 -0.27
34 0.0983 -2099.62 0.13 -166.44 -0.03
35 0.0986 -2106.78 0.07 -166.56 -0.09
36 0.0987 -2109.69 -0.00 -166.47 0.02
37 0.0988 -2111.62 0.05 -166.45 0.06
38 0.1065 -2328.68 0.09 -165.72 0.08
39 0.1066 -2329.45 0.00 -165.79 0.00
40 0.1066 -2331.84 -0.06 -165.83 -0.04
41 0.1583 -3852.19 ( 0.42) -101.18 ( 0.34)
42 0.1584 -3854.58 0.16 -101.22 0.16
43 0.1585 -3856.83 0.05 -101.21 0.03
44 0.1637 -4013.90 -0.02 -88.78 -0.05
45 0.1641 -4026.26 -0.15 -87.85 -0.05
46 0.1642 -4028.43 -0.06 -87.59 0.03
47 0.1643 -4029.73 0.08 -87.54 -0.03
48 0.1883 -4738.82 0.11 -16.18 -0.21
49 0.1884 -4740.65 0.33 -15.58 0.16
50 0.1887 -4752.06 0.05 -14.61 -0.10
51 0.1888 -4754.10 -0.23 -14.30 0.01
52 0.2375 -6072.20 -0.24 197.56 -0.05
53 0.2377 -6076.83 -0.04 198.39 -0.19
54 0.2377 -6077.95 -0.14 198.83 0.04
55 1.0623 4535.76 0.02 2098.52 0.03
56 1.0624 4534.07 0.08 2098.31 -0.08
57 2.1134 8947.86 0.01 4340.23 0.08
58 2.1134 8947.58 -0.06 4340.13 -0.03
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.
17DH163 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 44.361 44.381 44.343 ecceobj 0.160 0.160 0.161 incobj 23.420 23.418 23.421 qmin 35.893 35.936 36.003 qmax 53.114 53.105 53.058 amean 44.353 44.371 44.309 amin 43.985 43.999 43.926 amax 44.783 44.789 44.739 emean 0.170 0.170 0.167 emin 0.154 0.153 0.150 emax 0.187 0.187 0.186 imean 22.782 22.780 22.872 imin 22.254 22.247 22.470 imax 23.293 23.294 23.344 excite_mean 0.423 0.423 0.423 fracstop 1.000 1.000 1.000 cjmean 2.885 2.885 2.884 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 168.6 168.7 169.6 kozaiamp 180.0 180.0 180.0