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: 612218
# Created Sun Dec 22 02:07:44 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 37 observations of 37
# Arc: 15.02y
# First observation: 2001/05/24
# Last observation: 2016/05/29
# Chi-squared of fit: 94.75 DOF: 68 RMS: 0.28
# Min/Max residuals: -0.88 0.98
# Exact a, adot, b, bdot, g, gdot:
1.596019E-05 3.250897E-02 1.192414E-07 -4.422825E-04 2.919561E-02 1.281864E-03
# Covariance matrix:
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
# lat0 lon0 xBary yBary zBary JD0
2.178298 -110.659949 0.111707 0.038374 -1.012234 2452053.703933
# Heliocentric elements and errors
Epoch: 2452054.5000 = 2001/05/25
Mean Anomaly: 17.41998 +/- 0.000
Argument of Peri: 88.25400 +/- 0.000
Long of Asc Node: 139.17437 +/- 0.000
Inclination: 2.25160 +/- 0.000
Eccentricity: 0.10928298 +/- 0.0000
Semi-Major Axis: 39.30691851 +/- 0.0000
Time of Perihelion: 2447698.9090 +/- 0.0
Perihelion: 35.01134144 +/- 0.0000
Aphelion: 43.60249557 +/- 0.0000
Period (y) 246.4403 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -12.53395298 +/- 0.0000
Ecliptic Y -32.92910855 +/- 0.0000
Ecliptic Z 1.30188857 +/- 0.0000
Ecliptic XDOT 0.00280117 +/- 0.0000
Ecliptic YDOT -0.00118719 +/- 0.0000
Ecliptic ZDOT -0.00003668 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.25790024 +/- 0.0000
Geocenter to KBO 34.25174549 +/- 0.0000
# Hcoef: 5.67
The following table shows the complete astrometric record for 612218. 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 (612218) followed by the observatory code and reference code for the source of the astrometry.
2001 05 24.20319 16 32 01.90 -19 41 51.1 20.5R 612218 807 Cd1817 2001 05 24.26615 16 32 01.53 -19 41 50.3 612218 807 Cd1817 2001 06 09.01166 16 30 29.45 -19 38 37.4 20.9R 612218 304 Cd1817 2001 06 09.06293 16 30 29.14 -19 38 36.9 612218 304 Cd1817 2001 06 19.22068 16 29 31.75 -19 36 44.4 20.2R 612218 688 Cd1817 2001 06 19.28609 16 29 31.51 -19 36 43.6 612218 688 Cd1817 2001 07 22.22434 16 27 04.62 -19 32 38.8 21.0R 612218 688 Cd2368 2001 07 22.26943 16 27 04.49 -19 32 37.6 612218 688 Cd2368 2001 08 19.06387 16 26 17.39 -19 32 33.4 19.8R 612218 807 Cd7687 2001 08 20.07112 16 26 17.29 -19 32 36.2 612218 807 Cd7687 2001 08 21.07467 16 26 17.32 -19 32 41.1 612218 807 Cd7687 2002 02 22.64292 16 43 37.66 -20 10 17.4 21. R 612218 568 Ce9336 2002 02 23.63953 16 43 39.98 -20 10 18.5 612218 568 Ce9336 2002 05 19.34571 16 40 18.84 -20 00 18.1 20.5R 612218 644 Cl2614 2002 06 03.26013 16 38 52.02 -19 57 26.7 612218 675 Cf7160 2002 06 03.32390 16 38 51.64 -19 57 25.9 612218 675 Cf7160 2002 07 13.13774 16 35 21.77 -19 51 28.2 21.2R 612218 304 Cf9823 2002 07 13.16267 16 35 21.67 -19 51 28.0 612218 304 Cf9823 2002 07 18.00980 16 35 02.58 -19 51 02.9 612218 304 Cf9823 2002 07 18.19089 16 35 01.89 -19 51 02.1 612218 304 Cf9823 2003 05 01.53887 16 49 41.29 -20 19 27.1 21.5R 612218 568 Ch9866 2003 05 01.58457 16 49 41.07 -20 19 26.6 612218 568 Ch9866 2004 05 26.19208 16 55 13.91 -20 29 55.1 21.2R 612218 304 Ck8652 2004 05 26.22572 16 55 13.72 -20 29 54.8 612218 304 Ck8652 2005 06 29.29364 16 59 47.86 -20 39 09.9 612218 688 Cn8276 2005 06 29.33996 16 59 47.63 -20 39 09.7 612218 688 Cn8276 2013 07 09.38328 18 01 02.863 -21 42 24.60 20.4G 612218 F51 C~2jgB 2013 07 13.39012 18 00 40.801 -21 42 30.87 21.2G 612218 F51 C~2jgB 2013 07 13.41493 18 00 40.652 -21 42 30.95 19.3G 612218 F51 C~2jgB 2013 07 14.40899 18 00 35.311 -21 42 32.54 19.3G 612218 F51 C~2jgB 2013 07 15.35244 18 00 30.276 -21 42 34.10 21.8G 612218 F51 C~2jgB 2013 07 15.35313 18 00 30.267 -21 42 34.13 21.5G 612218 F51 C~2jgB 2013 07 15.36355 18 00 30.212 -21 42 34.14 22.9G 612218 F51 C~2jgB 2013 07 15.36423 18 00 30.211 -21 42 34.10 21.6G 612218 F51 C~2jgB 2013 07 28.32544 17 59 26.008 -21 42 59.16 22.0G 612218 F51 C~2jgB 2016 05 29.37583 18 27 47.147 -21 41 43.79 20.4R 612218 G37 C~2bkQ 2016 05 29.43513 18 27 46.847 -21 41 43.76 612218 G37 C~2bkQ
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 0.35 0.00 -0.12
2 0.0002 0.00 0.39 0.00 -0.12
3 0.0433 0.00 0.21 0.00 0.04
4 0.0434 0.00 0.05 0.00 -0.04
5 0.0712 0.00 -0.88 0.00 -0.03
6 0.0714 0.00 0.98 0.00 0.08
7 0.1616 0.00 -0.38 0.00 -0.16
8 0.1617 0.00 -0.15 0.00 0.86
9 0.2378 0.00 -0.05 0.00 -0.21
10 0.2406 0.00 -0.18 0.00 0.72
11 0.2433 0.00 -0.16 0.00 -0.17
12 0.7514 0.00 -0.65 0.00 -0.01
13 0.7541 0.00 -0.72 0.00 -0.22
14 0.9860 0.00 -0.26 0.00 -0.05
15 1.0268 0.00 0.22 0.00 -0.08
16 1.0270 0.00 0.24 0.00 0.01
17 1.1360 0.00 0.15 0.00 0.11
18 1.1361 0.00 0.24 0.00 0.16
19 1.1494 0.00 0.08 0.00 -0.11
20 1.1499 0.00 0.09 0.00 -0.18
21 1.9366 0.00 0.01 0.00 -0.16
22 1.9367 0.00 0.00 0.00 -0.12
23 3.0061 0.00 0.23 0.00 0.01
24 3.0062 0.00 0.35 0.00 -0.00
25 4.0988 0.00 -0.02 0.00 -0.17
26 4.0989 0.00 0.34 0.00 -0.27
27 12.1264 0.00 0.05 0.00 0.13
28 12.1374 0.00 -0.15 0.00 0.06
29 12.1375 0.00 -0.33 0.00 0.02
30 12.1402 0.00 -0.04 0.00 0.05
31 12.1428 0.00 0.01 0.00 0.07
32 12.1428 0.00 -0.07 0.00 0.04
33 12.1428 0.00 -0.04 0.00 0.05
34 12.1428 0.00 -0.00 0.00 0.09
35 12.1783 0.00 -0.14 0.00 -0.24
36 15.0148 0.00 0.22 0.00 -0.11
37 15.0150 0.00 0.23 0.00 0.07
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.
612218 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.328 39.328 39.328 ecceobj 0.109 0.109 0.109 incobj 2.251 2.251 2.251 qmin 34.115 34.112 34.117 qmax 45.350 45.343 45.354 amean 39.460 39.460 39.460 amin 39.000 39.001 39.000 amax 39.964 39.961 39.966 emean 0.115 0.115 0.115 emin 0.095 0.095 0.095 emax 0.135 0.135 0.135 imean 2.351 2.351 2.351 imin 1.162 1.162 1.162 imax 3.525 3.526 3.525 excite_mean 0.123 0.123 0.123 fracstop 1.000 1.000 1.000 cjmean 3.035 3.035 3.035 libcent 0 179.1 179.3 179.2 libamp 0 104.2 104.2 104.4 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 177.1 177.1 177.0 kozaiamp 179.9 180.0 180.0