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: 17DV177 # Created Sun Dec 22 02:10:59 2024 # Orbit generated from Bernstein formalism # Fitting 53 observations of 53 # Arc: 67.85d # First observation: 2017/01/21 # Last observation: 2017/03/30 Preliminary a, adot, b, bdot, g, gdot: -0.000016 0.034601 0.000012 0.012076 0.026959 0.000000 # Chi-squared of fit: 49.34 DOF: 100 RMS: 0.17 # Min/Max residuals: -0.37 0.44 # Exact a, adot, b, bdot, g, gdot: 1.895512E-05 3.022539E-02 7.898374E-06 1.206679E-02 2.618690E-02 -1.304052E-02 # Covariance matrix: 1.3733E-13 -2.3837E-12 -6.2216E-15 1.6119E-13 3.4681E-15 7.2986E-11 -2.3837E-12 5.9609E-09 1.4720E-11 -4.5209E-11 9.4068E-10 -1.2077E-08 -6.2216E-15 1.4720E-11 1.3349E-13 -8.4519E-13 2.3117E-12 -3.3563E-11 1.6119E-13 -4.5209E-11 -8.4519E-13 8.4768E-12 -6.1544E-12 3.5108E-10 3.4681E-15 9.4068E-10 2.3117E-12 -6.1544E-12 1.5040E-10 -1.4448E-09 7.2986E-11 -1.2077E-08 -3.3563E-11 3.5108E-10 -1.4448E-09 1.4602E-07 # lat0 lon0 xBary yBary zBary JD0 -9.477572 152.808527 0.518824 -0.137866 -0.826978 2457774.941791 # Heliocentric elements and errors Epoch: 2457770.5000 = 2017/01/17 Mean Anomaly: 356.58072 +/- 0.387 Argument of Peri: 26.84028 +/- 0.744 Long of Asc Node: 174.00364 +/- 0.050 Inclination: 23.58867 +/- 0.046 Eccentricity: 0.81375926 +/- 0.0153 Semi-Major Axis: 175.18898778 +/- 13.1862 Time of Perihelion: 2465814.8422 +/- 50.2 Perihelion: 32.62732746 +/- 3.6393 Aphelion: 317.75064810 +/- 24.0669 Period (y) 2318.8273 +/- 261.80 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.01548185 +/- 0.0157 Ecliptic Y 18.05187187 +/- 0.0081 Ecliptic Z -6.28766927 +/- 0.0030 Ecliptic XDOT -0.00042985 +/- 0.0000 Ecliptic YDOT -0.00333713 +/- 0.0000 Ecliptic ZDOT 0.00146881 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.01868614 +/- 0.0142 Geocenter to KBO 38.18703088 +/- 0.0179 # Hcoef: 9.59
The following table shows the complete astrometric record for 17DV177. 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 (17DV177) followed by the observatory code and reference code for the source of the astrometry.
2017 01 21.44099 10 05 27.66 +01 37 00.6 25.6z 17DV177 T09 C~8Mem 2017 01 21.48580 10 05 27.48 +01 37 01.4 25.2z 17DV177 T09 C~8Mem 2017 01 21.53790 10 05 27.29 +01 37 02.8 24.6z 17DV177 T09 C~8Mem 2017 01 23.41024 10 05 19.76 +01 37 43.2 25.6r 17DV177 T09 C~8Mem 2017 01 23.41467 10 05 19.72 +01 37 43.6 25.7r 17DV177 T09 C~8Mem 2017 01 23.45445 10 05 19.57 +01 37 44.4 26.1r 17DV177 T09 C~8Men 2017 01 23.48534 10 05 19.45 +01 37 44.9 26.5i 17DV177 T09 C~8Men 2017 01 23.52068 10 05 19.30 +01 37 45.4 25.8i 17DV177 T09 C~8Men 2017 01 23.56169 10 05 19.12 +01 37 46.4 26.2i 17DV177 T09 C~8Men 2017 01 23.59193 10 05 19.01 +01 37 47.1 25.4i 17DV177 T09 C~8Men 2017 01 30.43912 10 04 50.08 +01 40 30.6 24.7i 17DV177 T09 C~8Men 2017 01 30.50547 10 04 49.78 +01 40 32.9 25.2z 17DV177 T09 C~8Men 2017 01 30.53141 10 04 49.67 +01 40 33.6 24.9z 17DV177 T09 C~8Men 2017 01 30.56834 10 04 49.49 +01 40 34.5 24.6z 17DV177 T09 C~8Men 2017 02 23.45915 10 02 59.70 +01 52 38.2 25.1r 17DV177 T09 C~8Men 2017 02 23.46966 10 02 59.66 +01 52 38.5 25.5r 17DV177 T09 C~8Men 2017 02 23.47280 10 02 59.64 +01 52 38.8 25.9r 17DV177 T09 C~8Men 2017 02 23.48645 10 02 59.59 +01 52 39.3 25.9r 17DV177 T09 C~8Men 2017 02 23.50008 10 02 59.51 +01 52 39.8 25.6r 17DV177 T09 C~8Men 2017 02 23.50391 10 02 59.51 +01 52 40.0 25.6r 17DV177 T09 C~8Men 2017 02 25.36493 10 02 50.87 +01 53 43.9 25.6i 17DV177 T09 C~8Men 2017 02 25.36876 10 02 50.88 +01 53 44.0 25.0i 17DV177 T09 C~8Men 2017 02 25.41253 10 02 50.66 +01 53 45.2 24.4i 17DV177 T09 C~8Men 2017 02 25.41636 10 02 50.64 +01 53 45.2 24.7i 17DV177 T09 C~8Men 2017 02 25.42020 10 02 50.61 +01 53 45.4 25.7i 17DV177 T09 C~8Men 2017 02 25.43480 10 02 50.57 +01 53 45.6 24.7i 17DV177 T09 C~8Men 2017 02 25.44233 10 02 50.49 +01 53 46.2 25.0i 17DV177 T09 C~8Men 2017 03 04.32902 10 02 19.13 +01 57 47.9 24.5z 17DV177 T09 C~8Men 2017 03 04.33285 10 02 19.09 +01 57 47.9 24.9z 17DV177 T09 C~8Men 2017 03 04.35080 10 02 19.03 +01 57 48.4 24.6z 17DV177 T09 C~8Men 2017 03 04.35463 10 02 19.02 +01 57 48.9 24.9z 17DV177 T09 C~8Men 2017 03 04.44130 10 02 18.59 +01 57 51.8 24.8i 17DV177 T09 C~8Men 2017 03 04.44514 10 02 18.58 +01 57 51.9 24.2i 17DV177 T09 C~8Men 2017 03 04.45958 10 02 18.53 +01 57 52.4 25.4i 17DV177 T09 C~8Men 2017 03 04.46710 10 02 18.48 +01 57 52.6 25.3i 17DV177 T09 C~8Men 2017 03 04.50300 10 02 18.30 +01 57 54.1 25.0i 17DV177 T09 C~8Men 2017 03 04.50666 10 02 18.30 +01 57 54.3 24.8i 17DV177 T09 C~8Men 2017 03 04.51049 10 02 18.28 +01 57 54.3 25.2i 17DV177 T09 C~8Men 2017 03 06.50700 10 02 09.41 +01 59 05.5 25.2r 17DV177 T09 C~8Men 2017 03 06.51016 10 02 09.42 +01 59 05.7 25.2r 17DV177 T09 C~8Men 2017 03 06.52077 10 02 09.34 +01 59 06.0 25.2r 17DV177 T09 C~8Men 2017 03 06.52393 10 02 09.34 +01 59 06.2 25.2r 17DV177 T09 C~8Men 2017 03 25.26562 10 00 53.96 +02 10 22.2 26.2r 17DV177 T09 C~8Men 2017 03 25.27935 10 00 53.93 +02 10 22.7 25.7r 17DV177 T09 C~8Men 2017 03 25.29309 10 00 53.88 +02 10 23.2 26.1r 17DV177 T09 C~8Men 2017 03 30.25533 10 00 37.13 +02 13 18.1 25.1i 17DV177 T09 C~8Men 2017 03 30.25916 10 00 37.08 +02 13 18.4 25.8i 17DV177 T09 C~8Men 2017 03 30.26317 10 00 37.08 +02 13 18.2 26.0i 17DV177 T09 C~8Men 2017 03 30.26700 10 00 37.06 +02 13 18.6 25.7i 17DV177 T09 C~8Men 2017 03 30.27083 10 00 37.04 +02 13 18.9 25.4i 17DV177 T09 C~8Men 2017 03 30.27849 10 00 37.03 +02 13 18.9 25.3i 17DV177 T09 C~8Men 2017 03 30.28622 10 00 37.02 +02 13 19.4 25.4i 17DV177 T09 C~8Men 2017 03 30.29005 10 00 37.00 +02 13 19.6 25.0i 17DV177 T09 C~8Men
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 -0.15 0.00 -0.13
2 0.0001 -2.81 -0.07 -0.21 -0.25
3 0.0003 -5.97 0.13 0.09 0.15
4 0.0054 -125.86 0.07 -2.08 0.05
5 0.0054 -126.57 -0.34 -1.92 0.21
6 0.0055 -128.95 -0.10 -1.97 0.22
7 0.0056 -130.81 0.08 -2.14 0.09
8 0.0057 -133.09 0.14 -2.47 -0.19
9 0.0058 -135.97 -0.02 -2.49 -0.15
10 0.0059 -137.76 0.19 -2.42 -0.04
11 0.0246 -601.32 0.25 -3.02 -0.37
12 0.0248 -606.34 -0.03 -2.46 0.17
13 0.0249 -608.13 0.03 -2.38 0.23
14 0.0250 -610.98 -0.17 -2.50 0.10
15 0.0904 -2406.72 -0.12 92.08 -0.22
16 0.0904 -2407.39 0.03 92.15 -0.22
17 0.0904 -2407.77 -0.11 92.33 -0.06
18 0.0905 -2408.65 0.09 92.53 0.05
19 0.0905 -2409.95 -0.14 92.57 -0.00
20 0.0905 -2410.02 0.09 92.76 0.16
21 0.0956 -2553.80 -0.22 106.72 0.23
22 0.0956 -2553.69 0.18 106.87 0.35
23 0.0957 -2557.20 0.10 106.83 -0.01
24 0.0958 -2557.48 0.12 106.72 -0.15
25 0.0958 -2557.97 -0.07 106.75 -0.15
26 0.0958 -2558.61 0.44 106.72 -0.28
27 0.0958 -2559.94 -0.30 106.86 -0.19
28 0.1147 -3085.27 0.16 166.72 0.19
29 0.1147 -3085.83 -0.11 166.51 -0.06
30 0.1147 -3086.84 0.25 166.66 -0.07
31 0.1148 -3087.16 0.23 167.07 0.31
32 0.1150 -3094.22 -0.19 167.51 -0.05
33 0.1150 -3094.39 -0.07 167.55 -0.04
34 0.1150 -3095.27 0.16 167.75 0.03
35 0.1151 -3096.04 -0.04 167.67 -0.12
36 0.1152 -3099.10 -0.35 168.12 0.00
37 0.1152 -3099.17 -0.14 168.31 0.16
38 0.1152 -3099.45 -0.13 168.20 0.02
39 0.1206 -3249.04 -0.03 187.80 -0.07
40 0.1207 -3248.97 0.28 188.04 0.14
41 0.1207 -3250.20 -0.15 187.89 -0.10
42 0.1207 -3250.27 0.02 188.08 0.05
43 0.1720 -4546.69 -0.21 421.14 0.09
44 0.1720 -4547.29 0.06 421.45 0.20
45 0.1721 -4548.17 0.06 421.65 0.21
46 0.1857 -4844.99 0.36 496.59 -0.04
47 0.1857 -4845.80 -0.22 496.61 -0.08
48 0.1857 -4845.73 0.08 496.42 -0.33
49 0.1857 -4846.15 -0.11 496.69 -0.12
50 0.1857 -4846.54 -0.28 496.86 -0.00
51 0.1857 -4846.68 0.03 496.81 -0.17
52 0.1858 -4847.00 0.17 497.23 0.13
53 0.1858 -4847.35 0.04 497.31 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.
17DV177 quality flag:1 Type: CENTAURS CENTAURS SCATNEAR axisobj 167.711 207.510 142.183 ecceobj 0.805 0.845 0.766 incobj 23.668 23.585 23.751 qmin 29.913 29.089 30.565 qmax 346.568 434.707 260.244 amean 173.920 211.006 137.169 amin 163.871 194.168 131.277 amax 189.502 232.759 146.780 emean 0.817 0.852 0.764 emin 0.799 0.831 0.745 emax 0.832 0.868 0.779 imean 21.370 21.215 21.366 imin 20.337 20.041 20.149 imax 23.519 23.402 23.642 excite_mean 0.895 0.926 0.847 fracstop 1.000 1.000 1.000 cjmean 2.754 2.728 2.782 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 65.6 61.5 94.2 kozaiamp 40.6 32.5 69.8