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: 08HY21 # Created Sun Dec 22 02:09:02 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 66 observations of 68 # Arc: 7.73y # First observation: 2004/12/15 # Last observation: 2012/09/07 # Chi-squared of fit: 184.98 DOF: 126 RMS: 0.30 # Min/Max residuals: -0.77 1.02 # Exact a, adot, b, bdot, g, gdot: 3.937223E-05 3.535889E-01 -1.426241E-08 2.462070E-03 1.425617E-01 -1.180130E-01 # Covariance matrix: 4.4258E-12 -1.2924E-12 -9.7546E-12 2.8330E-12 8.1808E-16 4.5218E-17 -1.2924E-12 8.5667E-10 2.8470E-12 -4.0699E-10 -2.3869E-16 5.8724E-12 -9.7546E-12 2.8470E-12 2.6107E-11 -7.5806E-12 -2.1322E-15 -1.4824E-16 2.8330E-12 -4.0699E-10 -7.5806E-12 6.4248E-10 6.1900E-16 -4.5149E-12 8.1808E-16 -2.3869E-16 -2.1322E-15 6.1900E-16 1.7882E-19 1.3327E-20 4.5218E-17 5.8724E-12 -1.4824E-16 -4.5149E-12 1.3327E-20 6.5277E-14 # lat0 lon0 xBary yBary zBary JD0 12.836915 142.761931 0.846572 0.111676 -0.489622 2453354.889471 # Heliocentric elements and errors Epoch: 2453354.5000 = 2004/12/15 Mean Anomaly: 330.79379 +/- 0.000 Argument of Peri: 164.02822 +/- 0.000 Long of Asc Node: 53.36086 +/- 0.000 Inclination: 11.99388 +/- 0.000 Eccentricity: 0.50674388 +/- 0.0000 Semi-Major Axis: 10.96996485 +/- 0.0000 Time of Perihelion: 2454431.1609 +/- 0.0 Perihelion: 5.41100229 +/- 0.0000 Aphelion: 16.52892740 +/- 0.0000 Period (y) 36.3342 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -5.33685214 +/- 0.0000 Ecliptic Y 5.11665958 +/- 0.0000 Ecliptic Z 1.55846020 +/- 0.0000 Ecliptic XDOT -0.00234234 +/- 0.0000 Ecliptic YDOT -0.00675693 +/- 0.0000 Ecliptic ZDOT -0.00045736 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 7.55597821 +/- 0.0000 Geocenter to KBO 7.01462482 +/- 0.0000 # Hcoef: 12.16
The following table shows the complete astrometric record for 08HY21. 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 (08HY21) followed by the observatory code and reference code for the source of the astrometry.
2004 12 15.388728 09 58 56.60 +26 00 37.2 21.3V 08HY21 645 C~1Sgh 2004 12 15.389557 09 58 56.60 +26 00 37.3 21.0V 08HY21 645 C~1Sgh 2004 12 15.392045 09 58 56.59 +26 00 37.5 22.2V 08HY21 645 C~1Sgh 2007 04 08.39426 13 11 15.17 +02 06 39.2 19.7R 08HY21 644 Cz0359 2007 04 08.41461 13 11 14.67 +02 06 40.5 19.8R 08HY21 644 Cz0359 2007 04 08.43497 13 11 14.13 +02 06 42.2 19.5R 08HY21 644 Cz0359 2007 04 26.16914 13 03 58.42 +02 24 33.6 19.7V 08HY21 G96 Cz0359 2007 04 26.17470 13 03 58.28 +02 24 33.8 19.4V 08HY21 G96 Cz0359 2007 04 26.18031 13 03 58.17 +02 24 34.0 19.6V 08HY21 G96 Cz0359 2007 04 26.18585 13 03 58.03 +02 24 34.2 19.5V 08HY21 G96 Cz0359 2008 02 12.51428 15 34 49.33 -17 27 16.8 20.0V 08HY21 G96 Cz0359 2008 02 12.52042 15 34 49.51 -17 27 17.7 19.9V 08HY21 G96 Cz0359 2008 02 12.52659 15 34 49.65 -17 27 18.6 19.9V 08HY21 G96 Cz0359 2008 02 12.53270 15 34 49.80 -17 27 19.4 19.8V 08HY21 G96 Cz0359 2008 04 01.46740 15 40 23.21 -18 38 59.7 19.6V 08HY21 691 Cz0359 2008 04 01.48502 15 40 23.00 -18 39 00.4 19.9V 08HY21 691 Cz0359 2008 04 01.50265 15 40 22.81 -18 39 01.0 19.6V 08HY21 691 Cz0359 2008 04 05.45045 15 39 33.98 -18 41 24.2 19.7V 08HY21 691 Cz0359 2008 04 05.46807 15 39 33.69 -18 41 24.3 19.7V 08HY21 691 Cz0359 2008 04 05.48571 15 39 33.49 -18 41 24.6 19.5V 08HY21 691 Cz0359 2008 04 09.46061 15 38 33.96 -18 43 21.6 19.9V 08HY21 691 Cz0359 2008 04 09.47825 15 38 33.65 -18 43 22.0 19.7V 08HY21 691 Cz0359 2008 04 09.49353 15 38 33.41 -18 43 22.7 19.7V 08HY21 691 Cz0359 2008 04 14.43103 15 37 06.22 -18 45 10.6 19.5V 08HY21 691 Cz0359 2008 04 14.44865 15 37 05.88 -18 45 10.9 19.6V 08HY21 691 Cz0359 2008 04 14.46626 15 37 05.53 -18 45 11.1 19.6V 08HY21 691 Cz0359 2008 04 26.41479 15 32 43.69 -18 47 03.6 19.1V 08HY21 G96 Cy8251 2008 04 26.42049 15 32 43.54 -18 47 04.0 19.2V 08HY21 G96 Cy8251 2008 04 26.42612 15 32 43.36 -18 47 04.0 19.2V 08HY21 G96 Cy8251 2008 04 26.43178 15 32 43.22 -18 47 04.0 19.2V 08HY21 G96 Cy8251 2008 04 28.36922 15 31 55.39 -18 47 05.2 19.6V 08HY21 691 Cy8251 2008 04 28.38684 15 31 54.91 -18 47 04.7 19.5V 08HY21 691 Cy8251 2008 04 28.40446 15 31 54.45 -18 47 04.7 19.6V 08HY21 691 Cy8251 2008 05 02.38723 15 30 12.36 -18 46 54.2 19.4V 08HY21 691 Cz0359 2008 05 02.40489 15 30 11.87 -18 46 54.1 19.5V 08HY21 691 Cz0359 2008 05 02.42345 15 30 11.34 -18 46 53.9 20.1V 08HY21 691 Cz0359 2008 05 04.25548 15 29 23.18 -18 46 43.9 08HY21 691 Cz0359 2008 05 04.27314 15 29 22.70 -18 46 43.9 08HY21 691 Cz0359 2008 05 04.29081 15 29 22.21 -18 46 43.9 08HY21 691 Cz0359 2008 05 05.34877 15 28 53.87 -18 46 36.6 18.4C 08HY21 704 C~07I9 2008 05 05.35893 15 28 53.71 -18 46 36.1 18.3C 08HY21 704 C~07I9 2008 05 05.36914 15 28 53.54 -18 46 36.2 18.4C 08HY21 704 C~07I9 2008 05 05.37942 15 28 53.26 -18 46 36.3 18.7C 08HY21 704 C~07I9 2008 05 06.37258 15 28 26.40 -18 46 29.8 19.2V 08HY21 691 Cz0359 2008 05 06.39027 15 28 25.91 -18 46 29.6 19.3V 08HY21 691 Cz0359 2008 05 06.41144 15 28 25.34 -18 46 28.7 19.5V 08HY21 691 Cz0359 2008 05 26.19260 15 19 29.92 -18 42 52.7 08HY21 291 Cz0606 2008 05 26.20159 15 19 29.68 -18 42 52.5 08HY21 291 Cz0606 2008 05 26.21078 15 19 29.43 -18 42 52.7 08HY21 291 Cz0606 2008 05 27.23554 15 19 03.00 -18 42 42.3 19.6V 08HY21 291 Cz0606 2008 05 27.24456 15 19 02.77 -18 42 42.3 19.5V 08HY21 291 Cz0606 2008 05 27.25370 15 19 02.51 -18 42 42.7 19.4V 08HY21 291 Cz0606 2008 05 30.27527 15 17 46.32 -18 42 14.7 19.3V 08HY21 G96 Cz0606 2008 05 30.28134 15 17 46.17 -18 42 14.7 19.2V 08HY21 G96 Cz0606 2008 05 30.28747 15 17 46.03 -18 42 14.6 19.1V 08HY21 G96 Cz0606 2008 05 30.29348 15 17 45.85 -18 42 14.5 19.2V 08HY21 G96 Cz0606 2008 06 09.23738 15 13 58.42 -18 41 40.9 19.7V 08HY21 691 Cz1434 2008 06 09.25504 15 13 58.07 -18 41 41.0 19.7V 08HY21 691 Cz1434 2008 06 09.27618 15 13 57.63 -18 41 39.9 19.5V 08HY21 691 Cz1434 2008 06 10.27219 15 13 37.20 -18 41 43.8 19.9V 08HY21 291 Cz1434 2008 06 10.28372 15 13 37.00 -18 41 43.4 19.9V 08HY21 291 Cz1434 2008 06 10.29491 15 13 36.74 -18 41 43.9 20.1V 08HY21 291 Cz1434 2008 06 11.20213 15 13 18.69 -18 41 47.6 20.0V 08HY21 291 Cz1434 2008 06 11.21114 15 13 18.51 -18 41 47.6 20.0V 08HY21 291 Cz1434 2008 06 11.22041 15 13 18.31 -18 41 47.7 20.0V 08HY21 291 Cz1434 2012 09 07.52641 21 58 20.34 -26 32 02.2 20.6R 08HY21 E10 C~0iZU 2012 09 07.53594 21 58 20.17 -26 32 03.0 21.4R 08HY21 E10 C~0iZU 2012 09 07.65524 21 58 17.96 -26 32 09.4 21.3R 08HY21 E10 C~0iZU
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 -0.01 0.00 0.07
2 0.0000 0.00 0.02 0.00 0.07
3 0.0000 0.00 -0.04 0.00 -0.02
4 2.3108 0.00 0.07 0.00 0.90
5 2.3108 0.00 0.48 0.00 0.49
6 2.3109 0.00 0.28 0.00 0.48
7 2.3594 0.00 -0.05 0.00 -0.25
8 2.3594 0.00 -0.20 0.00 -0.23
9 2.3595 0.00 0.13 0.00 -0.21
10 2.3595 0.00 -0.02 0.00 -0.19
11 3.1598 0.00 -0.28 0.00 -0.02
12 3.1598 0.00 0.25 0.00 -0.07
13 3.1599 0.00 0.17 0.00 -0.11
14 3.1599 0.00 0.26 0.00 -0.06
15 3.2938 0.00 -0.18 0.00 0.01
16 3.2939 0.00 -0.23 0.00 -0.00
17 3.2939 0.00 0.01 0.00 0.08
18 3.3048 0.00 -0.06 0.00 0.10
19 3.3048 0.00 -0.61 0.00 0.56
20 3.3049 0.00 0.19 0.00 0.82
21 3.3157 0.00 -0.06 0.00 0.17
22 3.3158 0.00 -0.24 0.00 0.20
23 3.3158 0.00 0.03 0.00 -0.12
24 3.3293 0.00 -0.09 0.00 0.01
25 3.3294 0.00 0.03 0.00 0.01
26 3.3294 0.00 -0.01 0.00 0.10
27 3.3622 0.00 0.22 0.00 0.21
28 3.3622 0.00 0.11 0.00 -0.18
29 3.3622 0.00 -0.47 0.00 -0.18
30 3.3622 0.00 -0.44 0.00 -0.18
31 3.3675 0.00 0.33 0.00 -0.38
32 3.3676 0.00 -0.06 0.00 0.10
33 3.3676 0.00 -0.15 0.00 0.08
34 3.3785 0.00 0.18 0.00 -0.10
35 3.3786 0.00 -0.05 0.00 -0.10
36 3.3786 0.00 -0.53 0.00 -0.01
37 3.3836 0.00 0.24 0.00 0.01
38 3.3837 0.00 0.26 0.00 -0.07
39 3.3837 0.00 0.14 0.00 -0.16
40 3.3866 0.00 -0.76 0.00 0.15
41 3.3866 0.00 1.02 0.00 0.57
42 3.3867 0.00 ( 2.68) 0.00 ( 0.39)
43 3.3867 0.00 ( 2.72) 0.00 ( 0.21)
44 3.3894 0.00 -0.15 0.00 -0.71
45 3.3895 0.00 -0.17 0.00 -0.67
46 3.3895 0.00 0.05 0.00 0.04
47 3.4437 0.00 0.16 0.00 -0.12
48 3.4437 0.00 0.14 0.00 -0.00
49 3.4437 0.00 0.05 0.00 -0.28
50 3.4465 0.00 0.02 0.00 -0.20
51 3.4466 0.00 0.14 0.00 -0.28
52 3.4466 0.00 -0.15 0.00 -0.77
53 3.4549 0.00 -0.07 0.00 0.16
54 3.4549 0.00 -0.00 0.00 0.11
55 3.4549 0.00 0.24 0.00 0.16
56 3.4549 0.00 -0.17 0.00 0.21
57 3.4821 0.00 -0.21 0.00 -0.17
58 3.4822 0.00 0.22 0.00 -0.23
59 3.4822 0.00 0.41 0.00 0.90
60 3.4850 0.00 -0.39 0.00 -0.16
61 3.4850 0.00 0.22 0.00 0.27
62 3.4850 0.00 -0.17 0.00 -0.20
63 3.4875 0.00 -0.03 0.00 -0.07
64 3.4875 0.00 0.03 0.00 -0.02
65 3.4876 0.00 -0.12 0.00 -0.07
66 7.7293 0.00 -0.29 0.00 0.64
67 7.7294 0.00 -0.16 0.00 0.33
68 7.7297 0.00 0.11 0.00 -0.03
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.
08HY21 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 10.916 10.916 10.916 ecceobj 0.502 0.502 0.502 incobj 12.000 12.000 12.000 qmin 5.347 5.324 5.353 qmax 18.093 16.693 16.659 amean 11.043 10.896 10.857 amin 10.650 10.670 10.623 amax 11.764 11.067 11.068 emean 0.508 0.504 0.500 emin 0.498 0.498 0.496 emax 0.538 0.516 0.505 imean 11.052 11.156 11.096 imin 10.887 10.990 10.990 imax 11.188 11.427 11.202 excite_mean 0.543 0.540 0.536 fracstop 0.000 0.000 0.000 cjmean 3.752 3.782 3.793 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 169.7 168.5 166.5 kozaiamp 10.9 7.9 5.6