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: 03LA7 # Created Thu Nov 21 02:08:28 2024 # Orbit generated from Bernstein formalism # Fitting 17 observations of 18 # Arc: 4.78y # First observation: 2003/06/01 # Last observation: 2008/03/12 Preliminary a, adot, b, bdot, g, gdot: 0.000157 0.023387 0.000027 -0.002143 0.023925 0.000000 # Chi-squared of fit: 21.70 DOF: 28 RMS: 0.20 # Min/Max residuals: -0.70 0.38 # Exact a, adot, b, bdot, g, gdot: 1.646822E-05 2.278939E-02 -1.804530E-06 -2.064325E-03 2.242986E-02 -9.375337E-03 # Covariance matrix: 3.4138E-13 -1.3554E-13 -1.9167E-15 1.1052E-15 1.6287E-13 -1.8095E-13 -1.3554E-13 2.2933E-13 7.0557E-15 -1.7713E-14 1.4617E-13 1.8076E-12 -1.9167E-15 7.0557E-15 2.5011E-13 -6.5930E-14 6.6987E-15 6.5993E-14 1.1052E-15 -1.7713E-14 -6.5930E-14 2.7493E-14 -2.8566E-14 -1.9005E-13 1.6287E-13 1.4617E-13 6.6987E-15 -2.8566E-14 7.8084E-13 2.6990E-12 -1.8095E-13 1.8076E-12 6.5993E-14 -1.9005E-13 2.6990E-12 1.8946E-11 # lat0 lon0 xBary yBary zBary JD0 -2.396058 -121.658386 -0.211847 -0.041559 -0.993914 2452791.588443 # Heliocentric elements and errors Epoch: 2452790.5000 = 2003/05/31 Mean Anomaly: 338.95955 +/- 0.017 Argument of Peri: 271.76715 +/- 0.011 Long of Asc Node: 34.10573 +/- 0.002 Inclination: 5.63760 +/- 0.000 Eccentricity: 0.52535570 +/- 0.0003 Semi-Major Axis: 75.78424005 +/- 0.0395 Time of Perihelion: 2466874.2817 +/- 1.8 Perihelion: 35.97055793 +/- 0.0281 Aphelion: 115.59792218 +/- 0.0638 Period (y) 659.7457 +/- 0.52 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -23.72282025 +/- 0.0009 Ecliptic Y -38.87014115 +/- 0.0015 Ecliptic Z -1.86398113 +/- 0.0001 Ecliptic XDOT 0.00296752 +/- 0.0000 Ecliptic YDOT -0.00048294 +/- 0.0000 Ecliptic ZDOT -0.00020373 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.57559104 +/- 0.0014 Geocenter to KBO 44.58342692 +/- 0.0018 # Hcoef: 6.13
The following table shows the complete astrometric record for 03LA7. 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 (03LA7) followed by the observatory code and reference code for the source of the astrometry.
2003 06 01.08770 15 42 05.40 -22 07 33.9 21.6R 03LA7 807 Ci2139 2003 06 02.14882 15 42 00.65 -22 07 19.1 03LA7 807 Ci2139 2003 06 02.21447 15 42 00.34 -22 07 18.4 03LA7 807 Ci2139 2003 07 07.38504 15 39 47.46 -21 59 52.1 23.4R 03LA7 568 Ci2706 2003 07 08.30729 15 39 44.90 -21 59 42.7 03LA7 568 Ci2706 2003 07 08.37049 15 39 44.74 -21 59 41.3 03LA7 568 Ci2707 2005 08 08.02161 15 49 44.21 -22 44 47.1 22.2R 03LA7 807 Cr3579 2005 08 09.02980 15 49 43.86 -22 44 43.7 03LA7 807 Cr3579 2005 08 10.02349 15 49 43.61 -22 44 40.5 03LA7 807 Cr3579 2006 04 26.24200 16 01 35.71 -23 26 42.3 22.1R 03LA7 807 Cr3579 2006 04 26.32636 16 01 35.31 -23 26 41.4 03LA7 807 Cr3579 2006 04 27.29302 16 01 31.29 -23 26 33.5 03LA7 807 Cr3579 2007 04 21.24751 16 07 50.06 -23 50 30.1 21.5R 03LA7 807 Cv1533 2007 04 21.32203 16 07 49.74 -23 50 29.6 03LA7 807 Cv1533 2008 03 12.23295 16 15 23.15 -24 13 50.2 23.2R 03LA7 250 S~06Ac 2008 03 12.23920 16 15 23.14 -24 13 50.2 03LA7 250 S~06Ac 2008 03 12.29476 16 15 23.11 -24 13 50.4 03LA7 250 S~06Ac 2008 03 12.30101 16 15 23.11 -24 13 50.4 03LA7 250 S~06Ac
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 -0.08 0.00 0.07
2 0.0029 -67.64 0.23 -0.46 0.15
3 0.0031 -72.00 0.13 -0.75 -0.10
4 0.0994 -1972.43 -0.10 14.03 0.03
5 0.1019 -2009.24 -0.30 15.02 -0.11
6 0.1021 -2011.73 ( -0.23) 15.87 ( 0.68)
7 2.1874 6698.31 -0.01 -784.83 -0.05
8 2.1901 6692.85 0.10 -782.54 -0.10
9 2.1928 6688.79 0.21 -780.14 -0.03
10 2.9025 16856.61 0.38 -1256.05 0.14
11 2.9028 16851.00 -0.23 -1256.23 0.21
12 2.9054 16794.82 0.23 -1259.16 -0.07
13 3.8882 22225.41 -0.34 -1696.35 -0.16
14 3.8884 22220.95 -0.70 -1696.66 -0.21
15 4.7807 28679.54 0.17 -1988.96 0.03
16 4.7807 28679.40 0.08 -1988.99 0.04
17 4.7809 28679.02 0.10 -1989.26 0.06
18 4.7809 28679.02 0.15 -1989.26 0.09
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.
03LA7 quality flag:3 Type: 4:1EEE 4:1EEE 4:1EEE axisobj 75.563 75.679 75.447 ecceobj 0.527 0.527 0.526 incobj 5.658 5.658 5.658 qmin 35.200 35.197 35.174 qmax 119.628 119.926 119.250 amean 75.872 75.873 75.871 amin 74.461 74.397 74.625 amax 77.781 77.933 77.622 emean 0.526 0.526 0.526 emin 0.515 0.515 0.515 emax 0.538 0.539 0.537 imean 5.327 5.406 5.258 imin 5.210 5.284 5.058 imax 5.442 5.550 5.510 excite_mean 0.534 0.534 0.534 fracstop 1.000 1.000 1.000 cjmean 3.085 3.085 3.086 libcent 0 179.8 179.9 273.3 libamp 0 159.1 165.3 53.9 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 174.0 184.0 176.3 kozaiamp 180.0 179.9 180.0