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: 08AU138 # Created Fri Nov 22 02:08:59 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 33 observations of 33 # Arc: 20.39y # First observation: 2003/10/24 # Last observation: 2024/03/13 # Chi-squared of fit: 96.29 DOF: 60 RMS: 0.30 # Min/Max residuals: -0.87 1.11 # Exact a, adot, b, bdot, g, gdot: 1.064194E-05 1.608881E-02 5.037791E-06 4.764821E-03 2.251644E-02 8.986267E-04 # Covariance matrix: 2.0847E-13 -3.7703E-14 2.1890E-14 -1.1447E-14 2.7841E-14 -9.9864E-14 -3.7703E-14 1.7482E-14 -2.0798E-14 5.1049E-15 2.3959E-14 4.6459E-14 2.1890E-14 -2.0798E-14 1.2733E-13 -1.4438E-14 -5.0115E-14 -5.5807E-14 -1.1447E-14 5.1049E-15 -1.4438E-14 3.0658E-15 4.9652E-15 1.5288E-14 2.7841E-14 2.3959E-14 -5.0115E-14 4.9652E-15 1.2181E-13 5.0395E-14 -9.9864E-14 4.6459E-14 -5.5807E-14 1.5288E-14 5.0395E-14 1.3801E-13 # lat0 lon0 xBary yBary zBary JD0 39.792689 115.878929 0.992780 0.049457 -0.059298 2452936.962929 # Heliocentric elements and errors Epoch: 2452936.5000 = 2003/10/24 Mean Anomaly: 173.98505 +/- 0.009 Argument of Peri: 253.02800 +/- 0.002 Long of Asc Node: 50.55665 +/- 0.000 Inclination: 42.82538 +/- 0.000 Eccentricity: 0.36911211 +/- 0.0000 Semi-Major Axis: 32.51811513 +/- 0.0011 Time of Perihelion: 2420202.7384 +/- 2.4 Perihelion: 20.51528501 +/- 0.0011 Aphelion: 44.52094526 +/- 0.0017 Period (y) 185.4369 +/- 0.01 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -14.03836836 +/- 0.0002 Ecliptic Y 31.20827318 +/- 0.0005 Ecliptic Z 28.42436082 +/- 0.0004 Ecliptic XDOT -0.00163963 +/- 0.0000 Ecliptic YDOT -0.00111799 +/- 0.0000 Ecliptic ZDOT 0.00051526 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.48567152 +/- 0.0004 Geocenter to KBO 44.41198235 +/- 0.0007 # Hcoef: 6.62
The following table shows the complete astrometric record for 08AU138. 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 (08AU138) followed by the observatory code and reference code for the source of the astrometry.
2003 10 24.462186 08 45 48.87 +59 33 47.1 08AU138 645 C~1SLL 2003 10 24.463015 08 45 48.86 +59 33 47.1 08AU138 645 C~1SLL 2003 10 24.465503 08 45 48.86 +59 33 47.3 08AU138 645 C~1SLL 2003 11 30.382485 08 45 24.41 +60 07 22.0 08AU138 645 C~1SLL 2003 11 30.383314 08 45 24.41 +60 07 22.1 08AU138 645 C~1SLL 2003 11 30.385802 08 45 24.40 +60 07 22.2 08AU138 645 C~1SLL 2008 01 08.36123 09 12 34.75 +60 13 39.3 23.4r 08AU138 568 C~1QdQ 2008 01 08.41086 09 12 34.35 +60 13 41.3 22.7r 08AU138 568 C~1QdQ 2008 01 08.45929 09 12 33.97 +60 13 43.4 22.7r 08AU138 568 C~1QdQ 2008 03 08.23787 09 03 48.13 +60 26 12.5 23.3r 08AU138 568 C~1QdQ 2008 03 09.22854 09 03 40.78 +60 25 54.1 08AU138 568 C~1QdQ 2008 03 10.22917 09 03 33.43 +60 25 34.3 23.5r 08AU138 568 C~1QdQ 2008 04 04.34122 09 01 12.98 +60 12 29.7 23.3r 08AU138 568 C~1QdQ 2008 04 06.26762 09 01 06.10 +60 11 09.3 23.2r 08AU138 568 C~1QdQ 2008 05 03.19661 09 00 35.15 +59 49 00.5 08AU138 695 C~1QdQ 2008 05 03.23034 09 00 35.26 +59 48 59.2 08AU138 695 C~1QdQ 2008 05 04.18566 09 00 36.50 +59 48 06.4 08AU138 695 C~1QdQ 2008 05 04.19171 09 00 36.46 +59 48 06.9 08AU138 695 C~1QdQ 2008 12 06.41279 09 23 21.67 +59 35 40.7 08AU138 675 C~1QdQ 2008 12 06.41898 09 23 21.63 +59 35 41.2 22.5R 08AU138 675 C~1QdQ 2008 12 06.49616 09 23 21.41 +59 35 45.4 22.4R 08AU138 675 C~1QdQ 2008 12 06.50262 09 23 21.37 +59 35 46.2 08AU138 675 C~1QdQ 2008 12 21.49838 09 22 12.94 +59 49 38.0 08AU138 695 C~1QdQ 2008 12 21.55658 09 22 12.59 +59 49 41.1 08AU138 695 C~1QdQ 2008 12 22.47445 09 22 07.33 +59 50 29.6 08AU138 695 C~1QdQ 2010 01 21.34999 09 26 03.46 +60 00 17.9 08AU138 568 C~1QdQ 2010 01 21.38702 09 26 03.13 +60 00 19.1 08AU138 568 C~1QdQ 2010 01 21.41805 09 26 02.86 +60 00 20.2 08AU138 568 C~1QdQ 2016 03 13.15771 10 02 59.56 +58 32 53.4 22.8R 08AU138 G37 C~1pPw 2016 03 13.19772 10 02 59.21 +58 32 53.1 08AU138 G37 C~1pPw 2024 03 13.260290 10 55 45.801 +55 05 45.72 23.2G 08AU138 G37 C~7wKH 2024 03 13.301780 10 55 45.497 +55 05 45.89 08AU138 G37 C~7wKH 2024 03 13.344120 10 55 45.146 +55 05 45.86 08AU138 G37 C~7wKH
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 0.02 0.00 -0.37
2 0.0000 0.00 -0.17 0.00 -0.42
3 0.0000 0.00 -0.26 0.00 -0.34
4 0.1011 0.00 -0.14 0.00 -0.07
5 0.1011 0.00 -0.09 0.00 -0.02
6 0.1011 0.00 -0.09 0.00 -0.06
7 4.2078 0.00 -0.03 0.00 0.21
8 4.2079 0.00 0.03 0.00 0.13
9 4.2081 0.00 0.26 0.00 0.21
10 4.3717 0.00 0.21 0.00 -0.24
11 4.3744 0.00 0.35 0.00 -0.08
12 4.3772 0.00 -0.05 0.00 -0.17
13 4.4459 0.00 0.00 0.00 -0.10
14 4.4512 0.00 -0.07 0.00 -0.07
15 4.5249 0.00 -0.87 0.00 -0.29
16 4.5250 0.00 0.24 0.00 0.27
17 4.5276 0.00 1.11 0.00 -0.40
18 4.5277 0.00 0.40 0.00 0.43
19 5.1196 0.00 -0.08 0.00 -0.06
20 5.1197 0.00 -0.35 0.00 0.08
21 5.1199 0.00 0.40 0.00 -0.16
22 5.1199 0.00 0.14 0.00 0.27
23 5.1609 0.00 -0.27 0.00 0.26
24 5.1611 0.00 -0.44 0.00 0.31
25 5.1636 0.00 -0.08 0.00 0.36
26 6.2447 0.00 0.42 0.00 0.18
27 6.2448 0.00 0.34 0.00 0.12
28 6.2449 0.00 0.39 0.00 0.16
29 12.3852 0.00 -0.12 0.00 0.14
30 12.3853 0.00 -0.60 0.00 0.18
31 20.3855 0.00 -0.29 0.00 -0.05
32 20.3856 0.00 0.11 0.00 -0.11
33 20.3857 0.00 -0.08 0.00 -0.37
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.
08AU138 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 32.426 32.426 32.426 ecceobj 0.374 0.374 0.374 incobj 42.763 42.763 42.763 qmin 20.141 20.141 20.141 qmax 45.197 45.197 45.197 amean 32.439 32.302 32.303 amin 31.862 31.922 31.877 amax 32.894 32.757 32.757 emean 0.338 0.370 0.371 emin 0.311 0.361 0.362 emax 0.380 0.380 0.380 imean 42.906 42.136 42.129 imin 41.927 41.927 41.927 imax 43.505 42.393 42.382 excite_mean 0.760 0.766 0.766 fracstop 0.019 0.003 0.003 cjmean 2.348 2.346 2.346 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 258.8 253.2 253.1 kozaiamp 10.0 1.2 1.2