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: 427581 # Created Thu Apr 25 01:07:51 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 27 observations of 27 # Arc: 19.01y # First observation: 2003/08/24 # Last observation: 2022/08/27 # Chi-squared of fit: 64.22 DOF: 48 RMS: 0.27 # Min/Max residuals: -0.49 0.63 # Exact a, adot, b, bdot, g, gdot: 1.618393E-05 2.723143E-02 -9.085159E-07 -1.498602E-03 2.753493E-02 1.613393E-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 -1.548420 -34.531156 -0.088681 -0.027283 -1.011157 2452875.692713 # Heliocentric elements and errors Epoch: 2452876.5000 = 2003/08/25 Mean Anomaly: 137.18479 +/- 0.000 Argument of Peri: 61.48760 +/- 0.000 Long of Asc Node: 120.10656 +/- 0.000 Inclination: 3.49607 +/- 0.000 Eccentricity: 0.09630956 +/- 0.0000 Semi-Major Axis: 34.73639346 +/- 0.0000 Time of Perihelion: 2424380.8233 +/- 0.0 Perihelion: 31.39094659 +/- 0.0000 Aphelion: 38.08184032 +/- 0.0000 Period (y) 204.7318 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 30.78919138 +/- 0.0000 Ecliptic Y -21.07543508 +/- 0.0000 Ecliptic Z -0.98140498 +/- 0.0000 Ecliptic XDOT 0.00165839 +/- 0.0000 Ecliptic YDOT 0.00213629 +/- 0.0000 Ecliptic ZDOT -0.00015312 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.32437326 +/- 0.0000 Geocenter to KBO 36.31751307 +/- 0.0000 # Hcoef: 7.65
The following table shows the complete astrometric record for 427581. 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 (427581) followed by the observatory code and reference code for the source of the astrometry.
2003 08 24.19197 21 53 05.65 -14 29 19.8 21.9R 427581 807 Ci4137 2003 08 25.20245 21 53 00.39 -14 29 47.9 427581 807 Ci4137 2003 08 25.30711 21 52 59.85 -14 29 50.8 427581 807 Ci4137 2003 10 02.27122 21 50 06.68 -14 44 39.5 23.9R 427581 568 Ci6964 2003 10 02.37985 21 50 06.32 -14 44 41.4 427581 568 Ci6964 2003 10 24.10362 21 49 10.82 -14 48 57.7 23.5R 427581 695 Cj4699 2003 10 24.22589 21 49 10.63 -14 48 58.2 427581 695 Cj4699 2004 07 17.19348 22 02 16.23 -13 45 06.4 22.1R 427581 807 Cl2711 2004 07 17.29596 22 02 15.78 -13 45 08.9 427581 807 Cl2711 2004 08 12.26789 22 00 12.54 -13 56 58.7 20.9R 427581 807 Cl2711 2004 08 12.34177 22 00 12.18 -13 57 00.2 427581 807 Cl2711 2006 06 21.32051 22 15 38.17 -12 40 47.6 23.1R 427581 304 Cr4836 2006 06 21.36384 22 15 38.08 -12 40 48.6 427581 304 Cr4836 2006 08 04.43054 22 13 03.30 -12 57 17.0 23.1R 427581 250 S~06Ad 2006 08 04.43494 22 13 03.27 -12 57 17.2 427581 250 S~06Ad 2006 08 04.43934 22 13 03.25 -12 57 17.3 427581 250 S~06Ad 2006 08 04.44373 22 13 03.23 -12 57 17.4 427581 250 S~06Ad 2014 09 26.21146 22 55 58.51 -09 25 01.9 23.4R 427581 695 C~1LJE 2014 09 26.27375 22 55 58.23 -09 25 04.1 427581 695 C~1LJE 2014 10 22.13779 22 54 15.62 -09 34 46.5 23.4R 427581 G37 C~1BxD 2014 10 22.24434 22 54 15.33 -09 34 48.3 427581 G37 C~1BxD 2021 09 28.03641 23 35 39.25 -05 43 27.0 24.1V 427581 W84 C~5qUV 2021 09 28.10867 23 35 38.91 -05 43 29.2 24.2V 427581 W84 C~5qUV 2021 09 28.15683 23 35 38.68 -05 43 30.7 24.2V 427581 W84 C~5qUV 2022 08 27.377780 23 43 51.121 -04 53 39.56 23.5G 427581 G37 C~5nu9 2022 08 27.411000 23 43 50.968 -04 53 40.50 427581 G37 C~5nu9 2022 08 27.445920 23 43 50.804 -04 53 41.61 427581 G37 C~5nu9
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 -0.11 0.00 -0.03
2 0.0028 0.00 0.10 0.00 0.01
3 0.0031 0.00 0.31 0.00 0.00
4 0.1070 0.00 -0.38 0.00 -0.00
5 0.1073 0.00 0.06 0.00 -0.06
6 0.1668 0.00 -0.06 0.00 0.15
7 0.1671 0.00 0.06 0.00 0.41
8 0.8980 0.00 0.00 0.00 0.21
9 0.8983 0.00 -0.24 0.00 0.26
10 0.9694 0.00 -0.40 0.00 -0.34
11 0.9696 0.00 -0.01 0.00 0.27
12 2.8258 0.00 -0.12 0.00 0.12
13 2.8259 0.00 -0.23 0.00 -0.28
14 2.9466 0.00 0.63 0.00 -0.29
15 2.9466 0.00 0.49 0.00 -0.37
16 2.9466 0.00 0.51 0.00 -0.34
17 2.9466 0.00 0.53 0.00 -0.32
18 11.0911 0.00 -0.49 0.00 0.39
19 11.0913 0.00 -0.28 0.00 -0.10
20 11.1621 0.00 -0.29 0.00 0.38
21 11.1624 0.00 0.49 0.00 0.35
22 18.0968 0.00 -0.17 0.00 -0.03
23 18.0970 0.00 0.02 0.00 -0.04
24 18.0971 0.00 0.10 0.00 -0.07
25 19.0094 0.00 0.10 0.00 -0.16
26 19.0095 0.00 0.09 0.00 -0.06
27 19.0096 0.00 0.02 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.
427581 quality flag:3 Type: 5:4E 5:4E 5:4E axisobj 34.963 34.963 34.963 ecceobj 0.089 0.089 0.089 incobj 3.490 3.490 3.490 qmin 30.852 30.851 30.853 qmax 39.310 39.310 39.311 amean 34.943 34.943 34.943 amin 34.665 34.665 34.665 amax 35.242 35.243 35.241 emean 0.098 0.098 0.098 emin 0.080 0.080 0.080 emax 0.115 0.115 0.115 imean 2.230 2.231 2.230 imin 0.576 0.576 0.576 imax 3.616 3.616 3.616 excite_mean 0.107 0.107 0.107 fracstop 1.000 1.000 1.000 cjmean 3.004 3.004 3.004 libcent 0 180.3 180.3 180.4 libamp 0 33.4 33.4 33.4 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 179.5 179.5 179.1 kozaiamp 179.9 180.0 180.0