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: 05PL21 # Created Fri Apr 19 01:12:29 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 13 observations of 13 # Arc: 18.08y # First observation: 2005/08/08 # Last observation: 2023/09/06 # Chi-squared of fit: 21.56 DOF: 20 RMS: 0.23 # Min/Max residuals: -0.51 0.53 # Exact a, adot, b, bdot, g, gdot: 1.574466E-05 2.355410E-02 9.090628E-07 3.065485E-04 2.385391E-02 3.055286E-03 # Covariance matrix: 2.7517E-13 -8.8562E-14 8.8615E-16 -1.1228E-15 1.6464E-13 -1.9104E-13 -8.8562E-14 7.8465E-14 -6.7653E-16 1.2113E-15 -2.7902E-13 2.0078E-13 8.8615E-16 -6.7653E-16 1.9520E-13 -1.3289E-14 -1.7385E-15 -1.5136E-15 -1.1228E-15 1.2113E-15 -1.3289E-14 2.1548E-15 -5.8094E-15 3.2735E-15 1.6464E-13 -2.7902E-13 -1.7385E-15 -5.8094E-15 3.1465E-12 -8.6825E-13 -1.9104E-13 2.0078E-13 -1.5136E-15 3.2735E-15 -8.6825E-13 5.3664E-13 # lat0 lon0 xBary yBary zBary JD0 -4.792864 -42.589891 0.028781 -0.084757 -1.012210 2453590.591843 # Heliocentric elements and errors Epoch: 2453590.5000 = 2005/08/08 Mean Anomaly: 52.25795 +/- 0.062 Argument of Peri: 211.49512 +/- 0.080 Long of Asc Node: 38.38220 +/- 0.001 Inclination: 4.73767 +/- 0.000 Eccentricity: 0.15034782 +/- 0.0001 Semi-Major Axis: 46.45632431 +/- 0.0164 Time of Perihelion: 2436801.8582 +/- 21.8 Perihelion: 39.47171717 +/- 0.0156 Aphelion: 53.44093146 +/- 0.0201 Period (y) 316.6471 +/- 0.17 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 31.48023117 +/- 0.0023 Ecliptic Y -28.98060882 +/- 0.0021 Ecliptic Z -3.50268656 +/- 0.0003 Ecliptic XDOT 0.00209055 +/- 0.0000 Ecliptic YDOT 0.00174501 +/- 0.0000 Ecliptic ZDOT 0.00000579 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.93183094 +/- 0.0022 Geocenter to KBO 41.92179739 +/- 0.0031 # Hcoef: 6.74
The following table shows the complete astrometric record for 05PL21. 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 (05PL21) followed by the observatory code and reference code for the source of the astrometry.
2005 08 08.09110 21 25 37.87 -20 10 35.1 22.1R 05PL21 807 Co4015 2005 08 08.20764 21 25 37.31 -20 10 37.5 05PL21 807 Co4015 2005 08 09.09588 21 25 33.11 -20 10 57.1 05PL21 807 Co4015 2006 08 21.16475 21 30 01.84 -19 48 42.1 22.1R 05PL21 807 Cv1996 2006 08 21.25662 21 30 01.40 -19 48 43.9 05PL21 807 Cv1996 2006 08 22.16026 21 29 57.20 -19 49 01.7 05PL21 807 Cv1996 2007 07 11.34205 21 38 23.91 -19 06 25.9 05PL21 304 Cv1996 2007 07 11.39325 21 38 23.72 -19 06 26.9 05PL21 304 Cv1996 2014 07 29.36389 22 12 49.49 -15 54 40.6 23.5R 05PL21 G37 C~16aZ 2014 07 29.41200 22 12 49.30 -15 54 41.9 05PL21 G37 C~16aZ 2023 09 06.279300 22 52 13.525 -11 40 14.20 23.5G 05PL21 G37 C~7AQf 2023 09 06.315950 22 52 13.358 -11 40 16.15 05PL21 G37 C~7AQf 2023 09 06.352450 22 52 13.212 -11 40 16.87 05PL21 G37 C~7AQf
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 0.02 0.00 -0.15
2 0.0003 0.00 0.03 0.00 0.02
3 0.0028 0.00 0.06 0.00 -0.21
4 1.0351 0.00 0.08 0.00 -0.31
5 1.0354 0.00 0.01 0.00 -0.24
6 1.0378 0.00 -0.01 0.00 0.38
7 1.9227 0.00 -0.07 0.00 0.06
8 1.9228 0.00 -0.01 0.00 0.16
9 8.9727 0.00 -0.15 0.00 0.36
10 8.9728 0.00 -0.09 0.00 0.22
11 18.0785 0.00 0.07 0.00 0.53
12 18.0786 0.00 -0.06 0.00 -0.51
13 18.0787 0.00 0.12 0.00 -0.33
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.
05PL21 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.580 46.580 46.580 ecceobj 0.147 0.147 0.147 incobj 4.736 4.736 4.736 qmin 39.076 39.119 39.055 qmax 54.466 54.551 54.460 amean 46.599 46.599 46.597 amin 46.194 46.195 46.189 amax 47.048 47.071 47.049 emean 0.144 0.144 0.145 emin 0.131 0.131 0.132 emax 0.158 0.159 0.158 imean 4.006 4.009 4.005 imin 3.587 3.588 3.584 imax 4.503 4.508 4.505 excite_mean 0.160 0.160 0.161 fracstop 1.000 1.000 1.000 cjmean 3.102 3.102 3.102 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 188.1 188.5 189.0 kozaiamp 180.0 180.0 179.9