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: 17DF156 # Created Sun Dec 22 02:10:57 2024 # Orbit generated from Bernstein formalism # Fitting 46 observations of 47 # Arc: 3.00y # First observation: 2015/01/17 # Last observation: 2018/01/17 Preliminary a, adot, b, bdot, g, gdot: 0.000213 0.024179 -0.000028 -0.001729 0.024054 0.000000 # Chi-squared of fit: 22.78 DOF: 86 RMS: 0.12 # Min/Max residuals: -0.36 0.39 # Exact a, adot, b, bdot, g, gdot: 1.527797E-05 2.458464E-02 -9.641373E-07 -1.756775E-03 2.448670E-02 5.999905E-03 # Covariance matrix: 6.4887E-13 -5.9769E-13 -1.9364E-14 2.9833E-14 -3.1206E-13 -5.3352E-12 -5.9769E-13 1.0803E-12 5.1234E-14 -7.2754E-14 9.9597E-13 1.2937E-11 -1.9364E-14 5.1234E-14 4.3952E-13 -1.9766E-13 5.4909E-14 6.6979E-13 2.9833E-14 -7.2754E-14 -1.9766E-13 9.8346E-14 -7.3231E-14 -9.5333E-13 -3.1206E-13 9.9597E-13 5.4909E-14 -7.3231E-14 1.1981E-12 1.2960E-11 -5.3352E-12 1.2937E-11 6.6979E-13 -9.5333E-13 1.2960E-11 1.6954E-10 # lat0 lon0 xBary yBary zBary JD0 -9.339015 150.139374 0.543049 -0.132570 -0.807169 2457039.860010 # Heliocentric elements and errors Epoch: 2457030.5000 = 2015/01/08 Mean Anomaly: 45.42888 +/- 0.018 Argument of Peri: 173.49610 +/- 0.046 Long of Asc Node: 264.29111 +/- 0.004 Inclination: 10.07547 +/- 0.000 Eccentricity: 0.26051576 +/- 0.0005 Semi-Major Axis: 48.29462446 +/- 0.0116 Time of Perihelion: 2441561.0049 +/- 2.2 Perihelion: 35.71311375 +/- 0.0262 Aphelion: 60.87613517 +/- 0.0288 Period (y) 335.6266 +/- 0.12 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -35.38951951 +/- 0.0016 Ecliptic Y 20.94209102 +/- 0.0009 Ecliptic Z -6.62716917 +/- 0.0003 Ecliptic XDOT -0.00191891 +/- 0.0000 Ecliptic YDOT -0.00207550 +/- 0.0000 Ecliptic ZDOT -0.00030259 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.65223450 +/- 0.0014 Geocenter to KBO 40.83849042 +/- 0.0018 # Hcoef: 9.05
The following table shows the complete astrometric record for 17DF156. 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 (17DF156) followed by the observatory code and reference code for the source of the astrometry.
2015 01 17.359232 09 55 46.80 +02 40 03.0 17DF156 T09 C~81Bt 2015 01 17.368399 09 55 46.75 +02 40 03.1 17DF156 T09 C~81Bt 2016 02 09.313312 09 59 17.37 +02 11 40.7 17DF156 T09 C~81Bt 2016 02 09.350821 09 59 17.19 +02 11 41.5 17DF156 T09 C~81Bt 2017 01 21.44099 10 05 41.31 +01 31 47.8 25.3z 17DF156 T09 C~83F2 2017 01 21.48580 10 05 41.12 +01 31 48.3 25.0z 17DF156 T09 C~83F2 2017 01 21.51187 10 05 41.01 +01 31 48.7 25.0z 17DF156 T09 C~83F2 2017 01 21.56003 10 05 40.82 +01 31 49.4 25.6z 17DF156 T09 C~83F2 2017 01 23.36273 10 05 33.58 +01 32 14.4 25.5r 17DF156 T09 C~7gv4 2017 01 23.39642 10 05 33.43 +01 32 15.0 25.3r 17DF156 T09 C~7gv4 2017 01 23.52068 10 05 32.93 +01 32 17.1 25.3i 17DF156 T09 C~7gv4 2017 01 23.56169 10 05 32.76 +01 32 17.4 25.2i 17DF156 T09 C~7gv4 2017 02 21.32753 10 03 24.46 +01 42 02.2 24.6z 17DF156 T09 C~7gv4 2017 02 21.35310 10 03 24.36 +01 42 02.6 24.1z 17DF156 T09 C~7gv4 2017 02 21.37870 10 03 24.23 +01 42 03.4 24.5z 17DF156 T09 C~7gv4 2017 02 21.39002 10 03 24.17 +01 42 03.9 24.4z 17DF156 T09 C~7gv4 2017 02 23.45915 10 03 14.67 +01 42 56.4 26.4r 17DF156 T09 C~7gv4 2017 02 23.46966 10 03 14.61 +01 42 56.4 25.6r 17DF156 T09 C~7gv4 2017 02 23.47280 10 03 14.58 +01 42 56.4 25.6r 17DF156 T09 C~7gv4 2017 03 04.44514 10 02 34.00 +01 46 51.9 25.0i 17DF156 T09 C~7xTz 2017 03 04.45958 10 02 33.93 +01 46 52.2 25.0i 17DF156 T09 C~7xTz 2017 03 04.50300 10 02 33.73 +01 46 53.4 25.5i 17DF156 T09 C~7xTz 2017 03 04.50666 10 02 33.72 +01 46 53.5 25.2i 17DF156 T09 C~7xTz 2017 03 04.51049 10 02 33.70 +01 46 53.7 25.2i 17DF156 T09 C~7xTz 2017 03 06.49634 10 02 24.97 +01 47 47.2 25.3r 17DF156 T09 C~7gv4 2017 03 06.50700 10 02 24.92 +01 47 47.5 25.0r 17DF156 T09 C~7gv4 2017 03 06.52077 10 02 24.86 +01 47 47.8 25.6r 17DF156 T09 C~7gv4 2017 03 06.52393 10 02 24.85 +01 47 47.8 25.4r 17DF156 T09 C~7gv4 2017 03 06.53779 10 02 24.78 +01 47 48.2 25.2r 17DF156 T09 C~7gv4 2017 03 07.44431 10 02 20.85 +01 48 12.7 23.9y 17DF156 T09 C~7gv4 2017 03 07.44816 10 02 20.83 +01 48 13.0 23.8y 17DF156 T09 C~7gv4 2017 03 07.46245 10 02 20.76 +01 48 13.7 24.1y 17DF156 T09 C~7gv4 2017 03 07.48499 10 02 20.67 +01 48 14.0 24.1y 17DF156 T09 C~7gv4 2017 03 22.27563 10 01 20.67 +01 54 59.5 26.0g 17DF156 T09 C~7gv4 2017 03 22.28630 10 01 20.63 +01 54 59.9 25.5g 17DF156 T09 C~7gv4 2017 03 22.30327 10 01 20.57 +01 55 00.4 26.2g 17DF156 T09 C~7gv4 2017 03 22.36160 10 01 20.35 +01 55 01.9 26.4g 17DF156 T09 C~7gv4 2017 03 23.24138 10 01 17.13 +01 55 25.9 25.5i 17DF156 T09 C~7zpm 2017 03 23.25932 10 01 17.04 +01 55 26.6 25.1i 17DF156 T09 C~7zpm 2017 03 23.28109 10 01 16.96 +01 55 27.1 25.4i 17DF156 T09 C~7zpm 2017 03 23.28492 10 01 16.94 +01 55 27.2 25.1i 17DF156 T09 C~7zpm 2018 01 17.46122 10 10 57.88 +00 56 50.8 25.1i 17DF156 T09 C~81Bu 2018 01 17.46460 10 10 57.86 +00 56 50.4 25.2i 17DF156 T09 C~81Bu 2018 01 17.49135 10 10 57.79 +00 56 50.9 25.1i 17DF156 T09 C~81Bu 2018 01 17.54803 10 10 57.57 +00 56 51.6 24.9i 17DF156 T09 C~81Bu 2018 01 17.57490 10 10 57.45 +00 56 51.9 25.3i 17DF156 T09 C~81Bu 2018 01 17.59901 10 10 57.36 +00 56 52.1 25.1i 17DF156 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 0.12 0.00 -0.04
2 0.0000 -0.74 -0.06 -0.16 -0.12
3 1.0622 3549.95 -0.06 -506.63 0.03
4 1.0623 3547.14 -0.13 -506.82 -0.01
5 2.0125 9785.53 0.11 -757.86 0.05
6 2.0127 9782.68 0.04 -758.38 -0.10
7 2.0127 9780.99 -0.04 -758.57 -0.07
8 2.0129 9778.07 0.03 -758.90 0.00
9 2.0178 9667.33 0.10 -773.11 -0.20
10 2.0179 9665.01 -0.10 -773.33 -0.15
11 2.0182 9657.23 0.01 -773.96 0.21
12 2.0184 9654.73 0.12 -774.56 -0.06
13 2.0971 7644.01 -0.04 -892.87 -0.07
14 2.0972 7642.47 0.32 -893.02 -0.19
15 2.0972 7640.36 0.12 -892.94 -0.09
16 2.0973 7639.34 -0.05 -892.78 0.08
17 2.1029 7487.33 ( 0.22) -892.88 ( 0.55)
18 2.1030 7486.48 0.16 -893.19 0.24
19 2.1030 7486.06 -0.03 -893.35 0.09
20 2.1275 6832.94 -0.09 -883.18 0.14
21 2.1276 6831.85 -0.13 -883.26 0.03
22 2.1277 6828.62 -0.21 -883.17 0.04
23 2.1277 6828.45 -0.12 -883.13 0.08
24 2.1277 6828.10 -0.19 -883.05 0.15
25 2.1332 6686.63 -0.07 -878.19 0.05
26 2.1332 6685.82 -0.11 -878.16 0.05
27 2.1332 6684.87 -0.07 -878.19 -0.02
28 2.1332 6684.73 0.02 -878.25 -0.08
29 2.1333 6683.60 -0.11 -878.23 -0.10
30 2.1358 6619.78 0.10 -875.66 -0.14
31 2.1358 6619.39 -0.01 -875.48 0.02
32 2.1358 6618.16 -0.21 -875.18 0.28
33 2.1359 6616.79 0.03 -875.37 0.04
34 2.1764 5631.62 0.04 -806.40 -0.12
35 2.1764 5630.92 0.01 -806.23 -0.02
36 2.1764 5629.90 0.06 -806.07 0.04
37 2.1766 5626.28 0.12 -805.81 -0.04
38 2.1790 5572.65 0.39 -800.00 0.09
39 2.1791 5571.14 -0.01 -799.81 0.17
40 2.1791 5569.84 0.05 -799.76 0.09
41 2.1791 5569.52 -0.03 -799.77 0.06
42 3.0010 14984.70 -0.14 -1078.03 0.09
43 3.0010 14984.56 -0.10 -1078.51 -0.36
44 3.0010 14983.39 0.26 -1078.41 -0.01
45 3.0012 14980.04 0.14 -1078.90 0.04
46 3.0013 14978.24 -0.13 -1079.24 -0.05
47 3.0013 14976.90 -0.10 -1079.52 -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.
17DF156 quality flag:3 Type: 2:1E 2:1E 2:1E axisobj 48.066 48.098 48.033 ecceobj 0.261 0.262 0.260 incobj 10.067 10.067 10.067 qmin 35.123 34.967 35.197 qmax 61.695 61.793 61.475 amean 47.797 47.797 47.797 amin 47.069 47.078 47.116 amax 48.635 48.671 48.606 emean 0.245 0.250 0.244 emin 0.225 0.228 0.219 emax 0.269 0.271 0.266 imean 12.091 11.766 12.116 imin 11.509 11.146 11.510 imax 12.787 12.519 13.030 excite_mean 0.323 0.323 0.322 fracstop 1.000 1.000 1.000 cjmean 3.018 3.018 3.018 libcent 0 179.7 180.0 180.4 libamp 0 160.1 162.9 158.8 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 207.1 204.8 190.6 kozaiamp 180.0 180.0 180.0