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: 17DK163 # Created Tue Apr 1 01:11:04 2025 # Orbit generated from Bernstein formalism # Fitting 46 observations of 47 # Arc: 2.37y # First observation: 2016/12/23 # Last observation: 2019/05/09 Preliminary a, adot, b, bdot, g, gdot: 0.000016 0.018664 0.000004 -0.002652 0.020364 0.000000 # Chi-squared of fit: 23.97 DOF: 86 RMS: 0.13 # Min/Max residuals: -0.33 0.29 # Exact a, adot, b, bdot, g, gdot: 1.549690E-05 1.842003E-02 -3.082940E-06 -2.598089E-03 2.013093E-02 -7.691894E-03 # Covariance matrix: 1.8519E-13 2.2785E-13 2.4085E-14 -8.1348E-14 2.7731E-13 1.1591E-11 2.2785E-13 1.5809E-12 1.2160E-13 -6.8611E-13 9.3578E-13 1.0308E-10 2.4085E-14 1.2160E-13 5.4399E-14 -7.6284E-14 7.9207E-14 7.9168E-12 -8.1348E-14 -6.8611E-13 -7.6284E-14 3.5607E-13 -3.7863E-13 -4.7532E-11 2.7731E-13 9.3578E-13 7.9207E-14 -3.7863E-13 7.2464E-13 5.6096E-11 1.1591E-11 1.0308E-10 7.9168E-12 -4.7532E-11 5.6096E-11 7.1741E-09 # lat0 lon0 xBary yBary zBary JD0 -8.334795 151.300638 0.851872 -0.072184 -0.494062 2457746.019269 # Heliocentric elements and errors Epoch: 2457740.5000 = 2016/12/18 Mean Anomaly: 327.79959 +/- 0.288 Argument of Peri: 306.49533 +/- 0.121 Long of Asc Node: 285.42835 +/- 0.004 Inclination: 11.60983 +/- 0.001 Eccentricity: 0.47273077 +/- 0.0048 Semi-Major Axis: 69.39228841 +/- 0.3942 Time of Perihelion: 2476625.8122 +/- 50.6 Perihelion: 36.58841832 +/- 0.3925 Aphelion: 102.19615849 +/- 0.6693 Period (y) 578.0628 +/- 4.93 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -43.14475249 +/- 0.0018 Ecliptic Y 24.58499513 +/- 0.0010 Ecliptic Z -7.20090537 +/- 0.0003 Ecliptic XDOT -0.00024763 +/- 0.0000 Ecliptic YDOT -0.00272577 +/- 0.0000 Ecliptic ZDOT -0.00019802 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 50.17713315 +/- 0.0016 Geocenter to KBO 49.67479454 +/- 0.0021 # Hcoef: 7.92
The following table shows the complete astrometric record for 17DK163. 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 (17DK163) followed by the observatory code and reference code for the source of the astrometry.
2016 12 23.51848 10 01 29.22 +03 12 37.9 24.6z 17DK163 T09 C~7zpo 2016 12 23.58951 10 01 29.07 +03 12 37.5 24.2z 17DK163 T09 C~7zpo 2016 12 23.63426 10 01 29.00 +03 12 37.2 24.7z 17DK163 T09 C~7zpo 2017 01 23.35517 10 00 02.49 +03 15 54.2 24.7r 17DK163 T09 C~7zpo 2017 01 23.37982 10 00 02.40 +03 15 54.7 25.1r 17DK163 T09 C~7zpo 2017 01 23.41887 10 00 02.28 +03 15 55.5 25.3r 17DK163 T09 C~7zpo 2017 01 23.42310 10 00 02.25 +03 15 55.2 25.0r 17DK163 T09 C~7zpo 2017 01 23.44005 10 00 02.20 +03 15 55.4 25.1r 17DK163 T09 C~7zpo 2017 01 23.49071 10 00 02.02 +03 15 56.0 24.8i 17DK163 T09 C~7zpo 2017 01 23.49878 10 00 01.99 +03 15 56.2 24.6i 17DK163 T09 C~7zpo 2017 01 23.50979 10 00 01.94 +03 15 56.2 24.6i 17DK163 T09 C~7zpo 2017 01 23.54000 10 00 01.83 +03 15 56.7 24.8i 17DK163 T09 C~7zpo 2017 01 30.40627 09 59 36.74 +03 17 32.8 24.7i 17DK163 T09 C~7zpo 2017 01 30.42829 09 59 36.66 +03 17 33.5 24.9i 17DK163 T09 C~7zpo 2017 01 30.45035 09 59 36.59 +03 17 33.5 24.9i 17DK163 T09 C~7zpo 2017 01 30.49455 09 59 36.41 +03 17 34.0 24.3z 17DK163 T09 C~7zpo 2017 01 30.55762 09 59 36.17 +03 17 35.2 24.3z 17DK163 T09 C~7zpo 2017 01 30.58347 09 59 36.07 +03 17 35.5 24.2z 17DK163 T09 C~7zpo 2017 01 30.60540 09 59 35.99 +03 17 36.2 24.4z 17DK163 T09 C~7zpo 2017 02 21.31699 09 58 11.17 +03 24 10.3 25.4z 17DK163 T09 C~8HKW 2017 02 21.34253 09 58 11.08 +03 24 11.0 24.5z 17DK163 T09 C~8HKW 2017 02 21.36806 09 58 10.97 +03 24 11.1 24.8z 17DK163 T09 C~8HKW 2017 02 21.41563 09 58 10.79 +03 24 12.3 24.7z 17DK163 T09 C~8HKW 2017 02 23.35980 09 58 03.11 +03 24 52.3 25.8g 17DK163 T09 C~7zpo 2017 02 23.46231 09 58 02.73 +03 24 54.5 25.1r 17DK163 T09 C~7zpo 2017 02 23.47596 09 58 02.66 +03 24 55.0 25.1r 17DK163 T09 C~7zpo 2017 02 23.48959 09 58 02.61 +03 24 55.2 24.8r 17DK163 T09 C~7zpo 2017 02 23.50705 09 58 02.54 +03 24 55.5 25.1r 17DK163 T09 C~7zpo 2017 03 04.28551 09 57 28.62 +03 28 02.8 24.0z 17DK163 T09 C~7zpo 2017 03 04.31098 09 57 28.54 +03 28 03.3 23.8z 17DK163 T09 C~7zpo 2017 03 04.33650 09 57 28.44 +03 28 04.2 24.4z 17DK163 T09 C~7zpo 2017 03 04.47080 09 57 27.92 +03 28 07.0 24.5i 17DK163 T09 C~7zpo 2017 03 04.49253 09 57 27.83 +03 28 07.2 24.2i 17DK163 T09 C~7zpo 2017 03 22.27879 09 56 25.60 +03 34 36.1 25.2g 17DK163 T09 C~7zpo 2017 03 22.29262 09 56 25.56 +03 34 36.1 25.5g 17DK163 T09 C~7zpo 2017 03 22.40964 09 56 25.20 +03 34 38.8 24.7z 17DK163 T09 C~7zpo 2017 03 22.43533 09 56 25.11 +03 34 39.1 24.6z 17DK163 T09 C~7zpo 2017 03 22.46098 09 56 25.02 +03 34 39.8 24.6z 17DK163 T09 C~7zpo 2019 04 04.28639 10 03 25.50 +02 36 54.8 25.9g 17DK163 T09 C~81Bu 2019 04 04.32085 10 03 25.42 +02 36 55.6 26.1g 17DK163 T09 C~81Bu 2019 04 04.33235 10 03 25.38 +02 36 55.9 25.4g 17DK163 T09 C~81Bu 2019 04 04.33618 10 03 25.38 +02 36 55.9 25.5g 17DK163 T09 C~81Bu 2019 04 04.34384 10 03 25.34 +02 36 56.1 25.0g 17DK163 T09 C~81Bu 2019 05 09.238093 10 02 33.11 +02 46 34.8 17DK163 T09 C~81Bu 2019 05 09.259841 10 02 33.10 +02 46 35.0 17DK163 T09 C~81Bu 2019 05 09.298852 10 02 33.09 +02 46 35.4 17DK163 T09 C~81Bu 2019 05 09.349895 10 02 33.08 +02 46 36.0 17DK163 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 -0.21 0.00 0.21
2 0.0002 -1.97 -0.21 -1.16 -0.17
3 0.0003 -2.84 0.16 -1.81 -0.33
4 0.0844 -1285.65 -0.07 -269.76 -0.11
5 0.0845 -1287.08 -0.16 -269.76 0.05
6 0.0846 -1289.05 ( 0.02) -269.63 ( 0.44)
7 0.0846 -1289.36 -0.06 -270.07 0.03
8 0.0847 -1290.13 0.10 -270.15 0.07
9 0.0848 -1292.87 0.16 -270.53 0.04
10 0.0848 -1293.36 0.11 -270.50 0.13
11 0.0848 -1294.06 0.02 -270.76 -0.06
12 0.0849 -1295.78 -0.03 -270.86 0.05
13 0.1037 -1681.45 -0.07 -311.97 -0.11
14 0.1038 -1682.81 -0.14 -311.73 0.25
15 0.1039 -1683.80 0.18 -312.10 0.01
16 0.1040 -1686.50 0.08 -312.57 -0.21
17 0.1041 -1690.28 0.01 -312.70 0.02
18 0.1042 -1691.79 0.03 -312.94 -0.07
19 0.1043 -1693.16 -0.05 -312.70 0.29
20 0.1637 -3021.16 -0.03 -386.47 0.01
21 0.1638 -3022.67 0.09 -386.28 0.24
22 0.1639 -3024.24 0.13 -386.76 -0.20
23 0.1640 -3027.19 0.20 -386.58 0.07
24 0.1693 -3148.94 -0.12 -389.18 -0.24
25 0.1696 -3155.04 0.28 -389.11 -0.02
26 0.1696 -3156.20 -0.01 -389.00 0.10
27 0.1697 -3156.97 0.08 -389.08 0.04
28 0.1697 -3158.06 0.10 -389.16 -0.02
29 0.1937 -3699.53 -0.13 -390.65 -0.11
30 0.1938 -3700.83 0.14 -390.60 -0.07
31 0.1939 -3702.54 -0.01 -390.28 0.24
32 0.1943 -3710.82 -0.02 -390.37 0.11
33 0.1943 -3712.15 -0.02 -390.65 -0.18
34 0.2430 -4721.38 -0.30 -350.69 0.12
35 0.2431 -4721.94 -0.14 -350.90 -0.13
36 0.2434 -4727.94 0.04 -350.25 0.13
37 0.2434 -4729.31 0.03 -350.43 -0.15
38 0.2435 -4730.81 -0.13 -350.25 -0.05
39 2.2773 2381.49 -0.08 -1398.80 -0.09
40 2.2774 2380.09 0.09 -1398.47 0.06
41 2.2774 2379.42 -0.06 -1398.40 0.06
42 2.2774 2379.42 0.12 -1398.40 0.04
43 2.2774 2378.79 -0.17 -1398.42 -0.02
44 2.3729 1443.12 0.01 -1129.95 0.01
45 2.3730 1442.91 -0.02 -1129.82 -0.04
46 2.3731 1442.63 0.02 -1129.50 -0.05
47 2.3733 1442.28 0.08 -1128.99 0.02
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.
17DK163 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 68.358 69.418 67.362 ecceobj 0.465 0.478 0.452 incobj 11.593 11.591 11.595 qmin 35.660 35.442 36.026 qmax 103.677 105.995 101.056 amean 68.737 69.770 67.717 amin 67.769 68.761 66.755 amax 70.078 71.127 68.948 emean 0.467 0.476 0.453 emin 0.452 0.462 0.440 emax 0.480 0.491 0.468 imean 13.352 13.795 13.382 imin 12.563 12.614 12.616 imax 14.195 15.062 14.177 excite_mean 0.521 0.533 0.509 fracstop 1.000 1.000 1.000 cjmean 3.038 3.031 3.045 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 167.4 184.4 170.3 kozaiamp 180.0 180.0 180.0