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: 09JZ18 # Created Sun Apr 21 01:13:12 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 106 observations of 106 # Arc: 17.17y # First observation: 2005/04/02 # Last observation: 2022/06/02 # Chi-squared of fit: 97.89 DOF: 206 RMS: 0.17 # Min/Max residuals: -0.96 0.48 # Exact a, adot, b, bdot, g, gdot: 1.775645E-05 3.842677E-02 -5.050125E-06 -1.138000E-02 3.289841E-02 -6.326631E-03 # Covariance matrix: 1.4590E-13 -2.3615E-14 -2.3367E-14 5.5438E-15 5.6920E-15 -1.9444E-14 -2.3615E-14 4.7606E-15 5.5208E-15 -1.3072E-15 -1.1940E-15 4.5826E-15 -2.3367E-14 5.5208E-15 7.7973E-14 -7.5690E-15 -4.5551E-16 5.9837E-15 5.5438E-15 -1.3072E-15 -7.5690E-15 9.7938E-16 6.7062E-16 -1.4431E-15 5.6920E-15 -1.1940E-15 -4.5551E-16 6.7062E-16 3.2934E-14 -2.8269E-15 -1.9444E-14 4.5826E-15 5.9837E-15 -1.4431E-15 -2.8269E-15 5.0812E-15 # lat0 lon0 xBary yBary zBary JD0 17.749205 171.939627 -0.351812 0.283934 -0.886801 2453462.826768 # Heliocentric elements and errors Epoch: 2453462.5000 = 2005/04/02 Mean Anomaly: 334.43702 +/- 0.002 Argument of Peri: 175.47198 +/- 0.003 Long of Asc Node: 37.23246 +/- 0.000 Inclination: 23.81855 +/- 0.000 Eccentricity: 0.25242294 +/- 0.0000 Semi-Major Axis: 39.62638170 +/- 0.0012 Time of Perihelion: 2459932.1995 +/- 4.0 Perihelion: 29.62377390 +/- 0.0011 Aphelion: 49.62898950 +/- 0.0017 Period (y) 249.4508 +/- 0.01 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -29.63943865 +/- 0.0002 Ecliptic Y 3.84056999 +/- 0.0000 Ecliptic Z 9.26632440 +/- 0.0001 Ecliptic XDOT -0.00023746 +/- 0.0000 Ecliptic YDOT -0.00320328 +/- 0.0000 Ecliptic ZDOT -0.00106243 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 31.29083495 +/- 0.0002 Geocenter to KBO 30.39674049 +/- 0.0002 # Hcoef: 7.65
The following table shows the complete astrometric record for 09JZ18. 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 (09JZ18) followed by the observatory code and reference code for the source of the astrometry.
2005 04 02.326025 11 59 41.63 +19 26 23.1 22.7V 09JZ18 645 C~1vW3 2005 04 02.326854 11 59 41.63 +19 26 23.1 22.2V 09JZ18 645 C~1vW3 2005 04 02.329342 11 59 41.61 +19 26 23.1 23.2V 09JZ18 645 C~1vW3 2005 06 07.175567 11 55 29.93 +19 14 54.9 09JZ18 645 C~1vW3 2005 06 07.176400 11 55 29.93 +19 14 54.9 09JZ18 645 C~1vW3 2005 06 07.178889 11 55 29.93 +19 14 54.8 09JZ18 645 C~1vW3 2009 02 27.36881 12 32 10.21 +12 47 16.1 22.7r 09JZ18 568 C~59g5 2009 02 28.35374 12 32 04.95 +12 47 55.3 22.8r 09JZ18 568 C~59g5 2009 02 28.38364 12 32 04.78 +12 47 56.8 22.6r 09JZ18 568 C~59g5 2009 02 28.39774 12 32 04.71 +12 47 57.3 23.0r 09JZ18 568 C~59g5 2009 03 29.44359 12 29 09.35 +13 05 16.8 24.0r 09JZ18 568 C~59g5 2009 03 29.47197 12 29 09.17 +13 05 17.7 22.6r 09JZ18 568 C~59g5 2009 03 29.54231 12 29 08.72 +13 05 19.8 22.9r 09JZ18 568 C~59g5 2009 03 30.32858 12 29 03.76 +13 05 42.6 22.2r 09JZ18 568 C~59g5 2009 05 14.360998 12 24 56.810 +13 14 16.60 22.5i 09JZ18 568 C~0aRU 2009 05 15.269616 12 24 53.280 +13 14 08.80 23.0g 09JZ18 568 C~0aRU 2009 05 15.337143 12 24 53.010 +13 14 08.30 22.6i 09JZ18 568 C~0aRU 2009 05 15.399171 12 24 52.760 +13 14 07.60 22.4i 09JZ18 568 C~0aRU 2009 05 15.437580 12 24 52.610 +13 14 07.30 22.3i 09JZ18 568 C~0aRU 2009 05 22.387021 12 24 28.330 +13 12 41.50 23.3g 09JZ18 568 C~0aRU 2009 05 24.296150 12 24 22.540 +13 12 10.10 23.0g 09JZ18 568 C~0aRU 2010 02 24.60709 12 39 33.770 +11 05 48.84 22.7G 09JZ18 F51 C~2rXn 2010 04 17.44712 12 34 23.040 +11 33 27.21 22.5G 09JZ18 F51 C~2rXn 2011 01 27.67214 12 48 16.916 +09 08 39.92 22.1G 09JZ18 F51 C~2rXn 2011 04 02.39070 12 43 07.302 +09 46 32.69 22.4G 09JZ18 F51 C~2rXn 2012 04 15.35783 12 48 49.873 +08 10 06.58 22.1G 09JZ18 F51 C~2rXn 2012 06 16.31386 12 44 39.868 +08 07 49.50 22.6G 09JZ18 F51 C~2rXn 2013 01 11.61386 13 02 24.108 +05 40 39.79 22.8G 09JZ18 F51 C~2rXn 2013 04 17.33624 12 55 48.002 +06 27 11.33 22.1G 09JZ18 F51 C~2rXn 2014 03 24.44823 13 05 29.694 +04 30 38.40 22.4w 09JZ18 F51 C~1vW3 2014 03 24.46170 13 05 29.617 +04 30 38.70 22.5w 09JZ18 F51 C~1vW3 2014 03 24.47522 13 05 29.522 +04 30 39.12 22.5w 09JZ18 F51 C~1vW3 2014 04 23.34164 13 02 22.300 +04 44 31.40 22.5G 09JZ18 F51 C~2rXn 2014 04 29.26220 13 01 47.176 +04 46 21.33 22.1w 09JZ18 F51 C~1vW3 2014 04 29.27409 13 01 47.101 +04 46 21.82 22.5w 09JZ18 F51 C~1vW3 2014 04 29.29787 13 01 46.950 +04 46 22.01 22.5w 09JZ18 F51 C~1vW3 2014 05 24.31367 12 59 42.787 +04 49 24.63 22.5w 09JZ18 F51 C~1vW3 2014 05 24.32597 12 59 42.723 +04 49 24.66 22.8w 09JZ18 F51 C~1vW3 2014 05 24.33825 12 59 42.695 +04 49 24.77 22.3w 09JZ18 F51 C~1vW3 2014 05 24.35051 12 59 42.641 +04 49 24.99 22.3w 09JZ18 F51 C~1vW3 2014 05 27.30439 12 59 31.410 +04 49 13.41 21.9G 09JZ18 F51 C~2rXn 2014 06 18.29342 12 58 36.631 +04 44 01.23 22.3w 09JZ18 F51 C~1vW3 2014 06 18.31755 12 58 36.616 +04 44 00.67 22.5w 09JZ18 F51 C~1vW3 2014 06 18.32965 12 58 36.601 +04 44 00.51 22.4w 09JZ18 F51 C~1vW3 2014 07 01.26787 12 58 30.327 +04 37 52.64 22.5G 09JZ18 F51 C~2rXn 2014 07 01.29078 12 58 30.328 +04 37 51.70 22.7G 09JZ18 F51 C~2rXn 2014 07 01.30222 12 58 30.331 +04 37 51.45 22.4G 09JZ18 F51 C~2rXn 2015 01 08.57608 13 16 15.037 +02 15 07.31 22.4G 09JZ18 F51 C~2rXn 2015 03 25.43148 13 12 36.379 +02 45 05.24 22.3G 09JZ18 F51 C~2rXn 2015 03 27.46351 13 12 23.922 +02 46 10.69 22.3w 09JZ18 F51 C~1vW3 2015 03 27.47859 13 12 23.836 +02 46 11.07 22.1w 09JZ18 F51 C~1vW3 2015 03 27.49368 13 12 23.751 +02 46 11.67 22.3w 09JZ18 F51 C~1vW3 2015 03 27.51175 13 12 23.616 +02 46 12.12 22.2w 09JZ18 F51 C~1vW3 2015 04 15.49018 13 10 23.674 +02 55 32.59 22.6G 09JZ18 F51 C~2rXn 2015 04 16.34216 13 10 18.299 +02 55 54.38 21.8G 09JZ18 F51 C~2rXn 2015 04 18.34149 13 10 05.690 +02 56 45.14 22.2G 09JZ18 F51 C~2rXn 2015 04 18.35605 13 10 05.610 +02 56 45.45 23.0G 09JZ18 F51 C~2rXn 2015 04 18.37059 13 10 05.508 +02 56 45.60 22.9G 09JZ18 F51 C~2rXn 2015 04 18.38539 13 10 05.407 +02 56 45.78 22.7G 09JZ18 F51 C~2rXn 2015 06 08.26543 13 05 59.115 +03 03 22.92 22.7w 09JZ18 F51 C~1vW3 2015 06 08.27718 13 05 59.086 +03 03 22.76 22.8w 09JZ18 F51 C~1vW3 2015 06 08.28889 13 05 59.047 +03 03 22.59 22.6w 09JZ18 F51 C~1vW3 2015 06 08.30063 13 05 59.022 +03 03 22.49 22.8w 09JZ18 F51 C~1vW3 2016 01 15.63298 13 23 23.095 +00 31 53.35 22.7G 09JZ18 F51 C~2rXn 2016 01 17.62579 13 23 24.628 +00 32 02.69 22.6G 09JZ18 F51 C~2rXn 2016 02 05.62554 13 23 13.491 +00 35 55.74 22.2G 09JZ18 F51 C~2rXn 2016 02 15.63432 13 22 49.531 +00 39 29.51 22.8G 09JZ18 F51 C~2rXn 2016 02 21.59122 13 22 29.838 +00 42 00.74 22.7G 09JZ18 F51 C~2rXn 2016 03 01.58736 13 21 53.241 +00 46 14.57 22.2G 09JZ18 F51 C~2rXn 2016 03 30.40694 13 19 14.191 +01 01 20.54 22.2G 09JZ18 F51 C~2rXn 2016 04 05.41896 13 18 36.283 +01 04 23.80 22.4G 09JZ18 F51 C~2rXn 2016 04 05.43384 13 18 36.191 +01 04 24.18 22.5G 09JZ18 F51 C~2rXn 2016 04 05.44527 13 18 36.112 +01 04 24.23 22.3G 09JZ18 F51 C~2rXn 2016 04 05.45673 13 18 36.063 +01 04 24.61 22.7G 09JZ18 F51 C~2rXn 2016 04 05.52613 13 18 35.598 +01 04 26.77 22.2G 09JZ18 F51 C~2rXn 2016 04 05.53760 13 18 35.527 +01 04 27.16 22.4G 09JZ18 F51 C~2rXn 2016 04 05.55990 13 18 35.368 +01 04 27.68 22.0G 09JZ18 F51 C~2rXn 2016 06 09.28458 13 12 59.643 +01 18 12.45 22.5G 09JZ18 F51 C~2rXn 2017 01 30.62287 13 30 27.493 -01 10 40.63 22.3G 09JZ18 F51 C~2rXn 2017 04 01.39779 13 26 18.66 -00 45 10.0 22.2r 09JZ18 T09 C~7bDz 2017 04 01.45121 13 26 18.32 -00 45 08.3 22.3r 09JZ18 T09 C~7bDz 2017 04 01.48967 13 26 18.08 -00 45 07.2 22.5r 09JZ18 T09 C~7bDz 2017 04 01.49819 13 26 18.02 -00 45 06.9 22.4r 09JZ18 T09 C~7bDz 2017 04 26.36788 13 23 40.132 -00 33 55.66 21.9G 09JZ18 F51 C~2rXn 2017 04 26.37855 13 23 40.080 -00 33 55.09 22.0G 09JZ18 F51 C~2rXn 2017 04 26.38922 13 23 40.005 -00 33 54.93 22.3G 09JZ18 F51 C~2rXn 2017 04 26.39990 13 23 39.938 -00 33 54.63 22.1G 09JZ18 F51 C~2rXn 2018 03 18.47471 13 35 00.241 -02 39 55.52 22.2G 09JZ18 F51 C~2rXn 2018 03 18.48653 13 35 00.185 -02 39 55.37 22.2G 09JZ18 F51 C~2rXn 2018 03 18.49841 13 35 00.120 -02 39 55.01 22.0G 09JZ18 F51 C~2rXn 2018 03 18.51033 13 35 00.056 -02 39 54.77 22.2G 09JZ18 F51 C~2rXn 2020 04 19.45186 13 46 23.460 -06 00 42.75 22.0w 09JZ18 F52 C~3qFn 2020 04 19.46298 13 46 23.390 -06 00 42.63 22.1w 09JZ18 F52 C~3qFn 2020 04 19.47407 13 46 23.319 -06 00 41.97 22.1w 09JZ18 F52 C~3qFn 2020 04 19.48516 13 46 23.233 -06 00 42.25 22.0w 09JZ18 F52 C~3qFn 2021 05 08.357032 13 51 50.538 -07 41 21.32 22.1w 09JZ18 F51 C~4mxe 2021 05 08.368000 13 51 50.456 -07 41 21.28 22.3w 09JZ18 F51 C~4mxe 2021 05 08.389942 13 51 50.354 -07 41 20.68 22.2w 09JZ18 F51 C~4mxe 2022 05 21.336782 13 58 03.837 -09 24 49.35 22.1w 09JZ18 F52 C~5few 2022 05 21.347650 13 58 03.784 -09 24 49.10 22.1w 09JZ18 F52 C~5few 2022 05 21.358480 13 58 03.709 -09 24 48.88 22.1w 09JZ18 F52 C~5few 2022 05 21.369313 13 58 03.663 -09 24 48.48 22.3w 09JZ18 F52 C~5few 2022 06 02.280722 13 57 01.819 -09 21 56.72 22.3w 09JZ18 F52 C~5few 2022 06 02.291650 13 57 01.751 -09 21 56.78 22.2w 09JZ18 F52 C~5few 2022 06 02.302581 13 57 01.692 -09 21 56.76 22.1w 09JZ18 F52 C~5few 2022 06 02.313519 13 57 01.636 -09 21 56.46 22.0w 09JZ18 F52 C~5few
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 0.10 0.00 -0.14
2 0.0000 0.00 0.18 0.00 -0.16
3 0.0000 0.00 0.12 0.00 -0.21
4 0.1803 0.00 -0.18 0.00 -0.14
5 0.1803 0.00 -0.17 0.00 -0.10
6 0.1803 0.00 -0.15 0.00 -0.10
7 3.9070 0.00 -0.15 0.00 0.20
8 3.9097 0.00 0.10 0.00 -0.07
9 3.9098 0.00 -0.00 0.00 0.23
10 3.9098 0.00 0.11 0.00 0.16
11 3.9894 0.00 -0.07 0.00 0.17
12 3.9894 0.00 -0.02 0.00 0.24
13 3.9896 0.00 0.04 0.00 0.30
14 3.9918 0.00 0.17 0.00 0.35
15 4.1151 0.00 0.13 0.00 -0.03
16 4.1176 0.00 0.11 0.00 -0.04
17 4.1178 0.00 0.08 0.00 0.07
18 4.1179 0.00 0.00 0.00 -0.06
19 4.1180 0.00 0.01 0.00 0.00
20 4.1371 0.00 -0.12 0.00 -0.02
21 4.1423 0.00 -0.08 0.00 -0.08
22 4.8988 0.00 -0.28 0.00 0.42
23 5.0407 0.00 -0.07 0.00 -0.23
24 5.8216 0.00 0.02 0.00 0.08
25 5.9988 0.00 0.26 0.00 -0.13
26 7.0364 0.00 -0.07 0.00 -0.23
27 7.2060 0.00 -0.96 0.00 -0.41
28 7.7790 0.00 0.07 0.00 -0.10
29 8.0411 0.00 0.29 0.00 -0.10
30 8.9750 0.00 -0.15 0.00 0.24
31 8.9750 0.00 -0.04 0.00 0.09
32 8.9751 0.00 -0.20 0.00 0.06
33 9.0569 0.00 0.03 0.00 0.05
34 9.0731 0.00 0.30 0.00 -0.00
35 9.0731 0.00 0.23 0.00 0.29
36 9.0732 0.00 0.07 0.00 0.08
37 9.1417 0.00 -0.08 0.00 -0.29
38 9.1417 0.00 -0.29 0.00 -0.23
39 9.1417 0.00 0.04 0.00 -0.09
40 9.1418 0.00 -0.02 0.00 0.16
41 9.1498 0.00 0.01 0.00 -0.19
42 9.2100 0.00 0.03 0.00 -0.05
43 9.2101 0.00 0.30 0.00 -0.05
44 9.2101 0.00 0.32 0.00 0.07
45 9.2456 0.00 0.08 0.00 -0.04
46 9.2456 0.00 0.03 0.00 -0.21
47 9.2457 0.00 0.04 0.00 -0.08
48 9.7693 0.00 0.11 0.00 0.02
49 9.9770 0.00 -0.16 0.00 0.48
50 9.9826 0.00 -0.02 0.00 0.08
51 9.9826 0.00 0.11 0.00 -0.03
52 9.9827 0.00 0.26 0.00 0.08
53 9.9827 0.00 -0.06 0.00 -0.05
54 10.0347 0.00 0.01 0.00 -0.06
55 10.0370 0.00 -0.01 0.00 -0.25
56 10.0425 0.00 -0.12 0.00 0.30
57 10.0425 0.00 0.08 0.00 0.25
58 10.0426 0.00 -0.06 0.00 0.04
59 10.0426 0.00 -0.15 0.00 -0.14
60 10.1819 0.00 -0.11 0.00 0.28
61 10.1819 0.00 -0.05 0.00 0.25
62 10.1820 0.00 -0.15 0.00 0.22
63 10.1820 0.00 -0.04 0.00 0.26
64 10.7880 0.00 0.03 0.00 0.04
65 10.7934 0.00 0.11 0.00 -0.12
66 10.8454 0.00 0.10 0.00 -0.23
67 10.8728 0.00 0.05 0.00 -0.30
68 10.8892 0.00 -0.22 0.00 0.09
69 10.9138 0.00 0.14 0.00 0.12
70 10.9927 0.00 0.02 0.00 -0.06
71 11.0092 0.00 -0.06 0.00 0.12
72 11.0092 0.00 0.01 0.00 0.06
73 11.0092 0.00 -0.07 0.00 -0.23
74 11.0093 0.00 0.31 0.00 -0.19
75 11.0094 0.00 0.08 0.00 -0.10
76 11.0095 0.00 0.12 0.00 -0.05
77 11.0095 0.00 -0.10 0.00 -0.19
78 11.1867 0.00 0.09 0.00 0.02
79 11.8311 0.00 0.00 0.00 -0.19
80 11.9975 0.00 -0.13 0.00 0.04
81 11.9976 0.00 -0.12 0.00 0.13
82 11.9977 0.00 -0.04 0.00 0.07
83 11.9977 0.00 -0.13 0.00 0.11
84 12.0658 0.00 -0.13 0.00 -0.40
85 12.0659 0.00 0.10 0.00 -0.07
86 12.0659 0.00 -0.01 0.00 -0.15
87 12.0659 0.00 -0.01 0.00 -0.09
88 12.9587 0.00 -0.12 0.00 0.13
89 12.9587 0.00 0.04 0.00 -0.06
90 12.9587 0.00 0.07 0.00 -0.05
91 12.9588 0.00 0.12 0.00 -0.15
92 15.0476 0.00 -0.05 0.00 0.17
93 15.0476 0.00 0.00 0.00 0.00
94 15.0476 0.00 0.04 0.00 0.38
95 15.0477 0.00 -0.15 0.00 -0.19
96 16.0986 0.00 -0.15 0.00 -0.00
97 16.0987 0.00 -0.35 0.00 -0.20
98 16.0987 0.00 0.20 0.00 -0.06
99 17.1335 0.00 -0.06 0.00 -0.09
100 17.1335 0.00 0.09 0.00 -0.03
101 17.1336 0.00 -0.11 0.00 0.01
102 17.1336 0.00 0.14 0.00 0.22
103 17.1662 0.00 0.26 0.00 0.17
104 17.1662 0.00 0.03 0.00 -0.01
105 17.1663 0.00 -0.06 0.00 -0.11
106 17.1663 0.00 -0.11 0.00 0.06
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.
09JZ18 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.159 39.158 39.159 ecceobj 0.244 0.244 0.244 incobj 23.882 23.882 23.882 qmin 27.893 27.783 27.876 qmax 51.703 51.741 51.718 amean 39.455 39.454 39.455 amin 38.925 38.945 38.939 amax 40.063 40.066 40.076 emean 0.266 0.265 0.266 emin 0.241 0.241 0.241 emax 0.292 0.295 0.291 imean 22.558 22.616 22.563 imin 21.832 21.829 21.837 imax 23.479 23.479 23.479 excite_mean 0.467 0.467 0.467 fracstop 1.000 1.000 1.000 cjmean 2.801 2.801 2.801 libcent 0 179.7 179.6 180.2 libamp 0 120.7 120.1 120.9 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 189.5 186.1 188.9 kozaiamp 180.0 180.0 180.0