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: 99HH12 # Created Fri Apr 19 01:09:52 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 25 observations of 25 # Arc: 16.09y # First observation: 1999/04/18 # Last observation: 2015/05/22 # Chi-squared of fit: 70.50 DOF: 44 RMS: 0.30 # Min/Max residuals: -0.88 0.62 # Exact a, adot, b, bdot, g, gdot: 1.316138E-05 2.183753E-02 4.976257E-07 3.151843E-04 2.321234E-02 -3.676622E-04 # Covariance matrix: 2.3167E-13 -4.2836E-14 -2.4432E-16 -4.6056E-16 1.4743E-13 -8.9836E-14 -4.2836E-14 3.2256E-14 -6.5312E-16 4.6541E-16 1.3477E-14 8.3730E-14 -2.4432E-16 -6.5312E-16 1.1552E-13 -8.4841E-15 -2.2937E-15 -1.7975E-15 -4.6056E-16 4.6541E-16 -8.4841E-15 1.2262E-15 3.1582E-16 1.2576E-15 1.4743E-13 1.3477E-14 -2.2937E-15 3.1582E-16 3.4318E-13 4.2314E-14 -8.9836E-14 8.3730E-14 -1.7975E-15 1.2576E-15 4.2314E-14 2.2599E-13 # lat0 lon0 xBary yBary zBary JD0 -1.027267 -154.741015 -0.040733 -0.018362 -1.010558 2451286.711463 # Heliocentric elements and errors Epoch: 2451286.5000 = 1999/04/18 Mean Anomaly: 223.34572 +/- 0.128 Argument of Peri: 88.14938 +/- 0.121 Long of Asc Node: 255.69258 +/- 0.003 Inclination: 1.30318 +/- 0.000 Eccentricity: 0.02442765 +/- 0.0001 Semi-Major Axis: 43.30238910 +/- 0.0042 Time of Perihelion: 2490794.6722 +/- 38.2 Perihelion: 42.24461339 +/- 0.0048 Aphelion: 44.36016481 +/- 0.0049 Period (y) 284.9548 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -39.84358679 +/- 0.0010 Ecliptic Y -18.84794399 +/- 0.0005 Ecliptic Z -0.77231627 +/- 0.0000 Ecliptic XDOT 0.00113523 +/- 0.0000 Ecliptic YDOT -0.00230245 +/- 0.0000 Ecliptic ZDOT 0.00003797 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.08348669 +/- 0.0009 Geocenter to KBO 43.08057891 +/- 0.0011 # Hcoef: 6.98
The following table shows the complete astrometric record for 99HH12. 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 (99HH12) followed by the observatory code and reference code for the source of the astrometry.
1999 04 18.21072 13 32 06.14 -10 43 43.0 23.9R 99HH12 695 Ca5574 1999 04 18.28462 13 32 05.73 -10 43 40.3 99HH12 695 Ca5574 1999 04 18.39041 13 32 05.35 -10 43 37.8 99HH12 695 Ca5574 1999 06 05.89245 13 29 06.30 -10 25 35.1 22.8R 99HH12 950 Ca5574 1999 06 05.95103 13 29 06.18 -10 25 34.3 99HH12 950 Ca5574 1999 06 06.01039 13 29 06.00 -10 25 32.8 99HH12 950 Ca5574 2000 06 27.97421 13 33 09.45 -10 47 25.7 99HH12 950 Cb6477 2000 06 28.01067 13 33 09.41 -10 47 25.4 99HH12 950 Cb6477 2000 06 28.93437 13 33 08.68 -10 47 19.7 99HH12 950 Cb6477 2000 06 28.96820 13 33 08.65 -10 47 19.2 99HH12 950 Cb6477 2000 06 28.99353 13 33 08.63 -10 47 19.3 99HH12 950 Cb6477 2002 04 07.17182 13 47 14.21 -12 06 08.3 22.6R 99HH12 807 Cf4290 2002 04 07.23610 13 47 13.94 -12 06 07.4 99HH12 807 Cf4290 2002 04 08.20735 13 47 09.72 -12 05 42.9 99HH12 807 Cf4290 2006 05 25.224014 14 03 15.38 -13 27 44.0 99HH12 645 C~1eMn 2006 05 25.224843 14 03 15.38 -13 27 44.0 99HH12 645 C~1eMn 2006 05 25.227331 14 03 15.37 -13 27 43.9 99HH12 645 C~1eMn 2014 05 30.22785 14 42 36.81 -16 30 30.5 22.5R 99HH12 695 C~1LJ1 2014 05 30.35300 14 42 36.29 -16 30 27.8 99HH12 695 C~1LJ1 2015 04 13.18074 14 51 12.76 -17 07 33.2 23.6V 99HH12 W84 C~2J8l 2015 04 13.33132 14 51 12.11 -17 07 30.5 99HH12 W84 C~2J8l 2015 04 13.38114 14 51 11.90 -17 07 29.5 99HH12 W84 C~2J8l 2015 05 22.19088 14 48 16.30 -16 54 29.1 23.3R 99HH12 695 C~1hTP 2015 05 22.22878 14 48 16.13 -16 54 28.1 99HH12 695 C~1hTP 2015 05 22.28051 14 48 15.90 -16 54 27.3 99HH12 695 C~1hTP
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 0.31 0.00 -0.18
2 0.0002 0.00 -0.88 0.00 0.62
3 0.0005 0.00 0.51 0.00 0.39
4 0.1333 0.00 0.01 0.00 -0.02
5 0.1334 0.00 0.44 0.00 -0.14
6 0.1336 0.00 -0.00 0.00 0.42
7 1.1958 0.00 -0.01 0.00 -0.10
8 1.1959 0.00 -0.12 0.00 -0.04
9 1.1984 0.00 0.02 0.00 -0.10
10 1.1985 0.00 -0.01 0.00 0.19
11 1.1986 0.00 0.00 0.00 -0.07
12 2.9705 0.00 0.05 0.00 -0.03
13 2.9706 0.00 0.24 0.00 -0.67
14 2.9733 0.00 0.13 0.00 0.47
15 7.1020 0.00 -0.34 0.00 -0.52
16 7.1020 0.00 -0.29 0.00 -0.53
17 7.1020 0.00 -0.30 0.00 -0.48
18 15.1157 0.00 0.23 0.00 0.11
19 15.1161 0.00 0.21 0.00 0.39
20 15.9862 0.00 -0.02 0.00 0.02
21 15.9866 0.00 -0.08 0.00 -0.04
22 15.9868 0.00 -0.03 0.00 0.04
23 16.0930 0.00 -0.01 0.00 0.00
24 16.0931 0.00 -0.01 0.00 0.24
25 16.0933 0.00 0.02 0.00 0.01
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.
99HH12 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.299 43.299 43.299 ecceobj 0.024 0.024 0.024 incobj 1.305 1.305 1.305 qmin 41.834 41.833 41.836 qmax 45.551 45.550 45.551 amean 43.613 43.613 43.613 amin 43.277 43.277 43.274 amax 43.944 43.944 43.944 emean 0.022 0.022 0.022 emin 0.004 0.004 0.004 emax 0.037 0.037 0.037 imean 3.110 3.110 3.110 imin 2.397 2.397 2.397 imax 3.774 3.774 3.775 excite_mean 0.059 0.059 0.059 fracstop 1.000 1.000 1.000 cjmean 3.093 3.093 3.093 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 183.3 183.4 183.3 kozaiamp 179.9 180.0 180.0