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: 612548 # Created Wed Dec 25 02:07:40 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 25 observations of 25 # Arc: 12.00y # First observation: 2003/04/26 # Last observation: 2015/04/26 # Chi-squared of fit: 17.97 DOF: 44 RMS: 0.15 # Min/Max residuals: -0.33 0.38 # Exact a, adot, b, bdot, g, gdot: 1.666984E-05 2.631990E-02 -1.204115E-06 -4.050124E-03 2.561364E-02 7.887225E-04 # 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 -1.517334 -160.879825 -0.291254 -0.025530 -0.963658 2452755.851233 # Heliocentric elements and errors Epoch: 2452756.5000 = 2003/04/27 Mean Anomaly: 19.35709 +/- 0.000 Argument of Peri: 165.72593 +/- 0.000 Long of Asc Node: 9.97390 +/- 0.000 Inclination: 8.84895 +/- 0.000 Eccentricity: 0.10595666 +/- 0.0000 Semi-Major Axis: 44.37943916 +/- 0.0000 Time of Perihelion: 2446950.0765 +/- 0.0 Perihelion: 39.67714184 +/- 0.0000 Aphelion: 49.08173648 +/- 0.0000 Period (y) 295.6521 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -37.69230604 +/- 0.0000 Ecliptic Y -13.37094519 +/- 0.0000 Ecliptic Z -1.03382509 +/- 0.0000 Ecliptic XDOT 0.00084655 +/- 0.0000 Ecliptic YDOT -0.00268692 +/- 0.0000 Ecliptic ZDOT -0.00043481 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.00698559 +/- 0.0000 Geocenter to KBO 39.04172133 +/- 0.0000 # Hcoef: 7.35
The following table shows the complete astrometric record for 612548. 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 (612548) followed by the observatory code and reference code for the source of the astrometry.
2003 04 26.35049 13 08 14.91 -08 53 24.6 22.6R 612548 568 Cq9883 2003 04 26.39540 13 08 14.70 -08 53 23.5 22.7R 612548 568 Cq9883 2003 04 26.43772 13 08 14.52 -08 53 22.3 22.7R 612548 568 Cq9883 2003 04 27.40473 13 08 10.14 -08 52 57.1 22.4R 612548 568 Cq9883 2003 05 30.31325 13 06 07.56 -08 41 03.8 23.5R 612548 568 Cq9883 2003 05 30.36642 13 06 07.41 -08 41 02.9 23.0R 612548 568 Cq9883 2003 05 30.42556 13 06 07.26 -08 41 02.0 23.8R 612548 568 Cq9883 2004 04 15.30502 13 14 21.63 -09 45 04.4 612548 675 Cq9883 2004 04 15.35399 13 14 21.38 -09 45 03.3 612548 675 Cq9883 2004 04 15.39697 13 14 21.18 -09 45 02.1 612548 675 Cq9883 2004 04 16.26482 13 14 17.01 -09 44 39.4 612548 675 Cq9883 2005 07 09.19822 13 15 48.50 -10 09 05.9 612548 675 Cq9883 2005 07 10.21920 13 15 49.10 -10 09 08.3 612548 675 Cq9883 2007 07 11.96559 13 26 15.43 -11 39 48.7 612548 304 Cv1984 2007 07 12.05699 13 26 15.47 -11 39 48.9 612548 304 Cv1984 2014 04 30.03567 14 07 10.36 -17 03 45.0 612548 W84 C~2fbn 2014 04 30.10463 14 07 10.02 -17 03 43.4 23.7V 612548 W84 C~2fbn 2014 05 01.02299 14 07 05.50 -17 03 21.9 612548 W84 C~2fbn 2014 05 01.09224 14 07 05.16 -17 03 20.1 612548 W84 C~2fbn 2015 03 16.45102 14 16 03.56 -17 58 35.8 23.3R 612548 G37 C~1N5n 2015 03 16.50511 14 16 03.38 -17 58 34.9 612548 G37 C~1N5n 2015 04 25.15882 14 13 06.54 -17 46 55.1 612548 W84 C~2fbn 2015 04 25.19332 14 13 06.36 -17 46 54.3 612548 W84 C~432h 2015 04 25.22769 14 13 06.19 -17 46 53.5 23.6V 612548 W84 C~2fbn 2015 04 26.18890 14 13 01.42 -17 46 31.7 612548 W84 C~2fbn
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 -0.18 0.00 -0.21
2 0.0001 0.00 -0.21 0.00 -0.28
3 0.0002 0.00 0.02 0.00 -0.18
4 0.0029 0.00 -0.07 0.00 0.04
5 0.0930 0.00 -0.01 0.00 0.10
6 0.0931 0.00 -0.04 0.00 0.15
7 0.0933 0.00 0.17 0.00 0.09
8 0.9718 0.00 0.25 0.00 0.38
9 0.9719 0.00 0.07 0.00 0.18
10 0.9721 0.00 0.20 0.00 0.23
11 0.9744 0.00 -0.29 0.00 -0.10
12 2.2036 0.00 -0.02 0.00 -0.33
13 2.2063 0.00 0.20 0.00 -0.09
14 4.2098 0.00 -0.08 0.00 0.06
15 4.2100 0.00 -0.03 0.00 -0.04
16 11.0108 0.00 -0.09 0.00 0.07
17 11.0110 0.00 -0.03 0.00 0.06
18 11.0135 0.00 -0.12 0.00 -0.19
19 11.0137 0.00 -0.06 0.00 -0.02
20 11.8880 0.00 0.01 0.00 -0.16
21 11.8882 0.00 0.22 0.00 0.15
22 11.9967 0.00 0.03 0.00 -0.02
23 11.9968 0.00 -0.05 0.00 0.01
24 11.9969 0.00 0.00 0.00 0.03
25 11.9996 0.00 0.03 0.00 0.08
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.
612548 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.942 43.942 43.942 ecceobj 0.097 0.097 0.097 incobj 8.888 8.888 8.888 qmin 38.854 38.851 38.850 qmax 49.968 49.997 49.916 amean 44.268 44.268 44.269 amin 43.914 43.914 43.914 amax 44.662 44.662 44.662 emean 0.104 0.104 0.104 emin 0.090 0.090 0.090 emax 0.120 0.120 0.119 imean 8.783 8.783 8.783 imin 8.057 8.057 8.057 imax 9.394 9.396 9.396 excite_mean 0.185 0.185 0.185 fracstop 1.000 1.000 1.000 cjmean 3.063 3.063 3.063 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 184.3 184.4 184.4 kozaiamp 180.0 180.0 180.0