The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory.
# Object: 98XY95
# Created Fri May 2 02:36:27 2008
# Orbit generated from Bernstein formalism
# Fitting 41 observations of 41
# Arc: 8.76y
# First observation: 1998/12/12
# Last observation: 2007/09/17
Preliminary a, adot, b, bdot, g, gdot:
-0.001205 0.026909 -0.000072 0.002608 0.022784 0.000000
# Chi-squared of fit: 538.76 DOF: 76 RMS: 0.64
# Min/Max residuals: -1.24 1.55
# Exact a, adot, b, bdot, g, gdot:
1.832263E-05 2.515581E-02 6.574548E-06 2.480525E-03 2.378714E-02 -7.233447E-03
# Covariance matrix:
1.7226E-13 -1.3514E-13 5.8368E-15 -7.0296E-15 1.6824E-13 -3.8911E-13
-1.3514E-13 1.6064E-13 -6.9154E-15 1.0109E-14 -1.2595E-13 5.2642E-13
5.8368E-15 -6.9154E-15 4.7850E-14 -1.0837E-14 6.1749E-15 -2.3713E-14
-7.0296E-15 1.0109E-14 -1.0837E-14 9.7458E-15 -4.6296E-15 3.7656E-14
1.6824E-13 -1.2595E-13 6.1749E-15 -4.6296E-15 2.9371E-13 -3.0848E-13
-3.8911E-13 5.2642E-13 -2.3713E-14 3.7656E-14 -3.0848E-13 1.9152E-12
# lat0 lon0 xBary yBary zBary JD0
3.695123 80.019194 -0.019878 0.063153 -0.981487 2451160.415971
# Heliocentric elements and errors
Epoch: 2451160.5000 = 1998/12/13
Mean Anomaly: 336.94314 +/- 0.007
Argument of Peri: 89.19988 +/- 0.014
Long of Asc Node: 47.27465 +/- 0.001
Inclination: 6.65182 +/- 0.000
Eccentricity: 0.41916970 +/- 0.0001
Semi-Major Axis: 64.34288988 +/- 0.0108
Time of Perihelion: 2463234.3840 +/- 2.3
Perihelion: 37.37229974 +/- 0.0076
Aphelion: 91.31348001 +/- 0.0160
Period (y) 516.1299 +/- 0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 7.42955743 +/- 0.0002
Ecliptic Y 42.28893678 +/- 0.0009
Ecliptic Z 2.70962364 +/- 0.0001
Ecliptic XDOT -0.00299966 +/- 0.0000
Ecliptic YDOT -0.00032545 +/- 0.0000
Ecliptic ZDOT 0.00023123 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.02202410 +/- 0.0009
Geocenter to KBO 42.03951960 +/- 0.0010
# Hcoef: 6.18
The following table shows the complete astrometric record for 98XY95. 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 (98XY95) followed by the observatory code and reference code for the source of the astrometry.
1998 12 12.91524 05 15 19.72 +26 44 53.9 22.2R 98XY95 950 Ca3641 1998 12 13.02631 05 15 19.18 +26 44 53.6 21.6R 98XY95 950 Ca3641 1998 12 13.07074 05 15 18.93 +26 44 53.5 98XY95 950 Ca3641 1998 12 13.86534 05 15 14.68 +26 44 50.0 98XY95 950 Ca3641 1998 12 14.19124 05 15 12.93 +26 44 48.6 98XY95 950 Ca3641 1999 01 18.10075 05 12 24.30 +26 41 32.2 98XY95 709 Ca7793 1999 01 19.12019 05 12 20.28 +26 41 25.1 23.6R 98XY95 709 Ca3641 1999 01 19.16583 05 12 20.02 +26 41 25.3 22.1R 98XY95 709 Ca3641 1999 01 19.21161 05 12 19.97 +26 41 24.0 22.5R 98XY95 709 Ca3641 1999 01 19.25780 05 12 19.70 +26 41 24.7 22.1R 98XY95 709 Ca3641 1999 02 09.11133 05 11 17.13 +26 39 17.6 21.2R 98XY95 709 Ca7793 1999 02 09.13961 05 11 16.97 +26 39 17.4 21.5R 98XY95 709 Ca7793 1999 02 09.15659 05 11 16.97 +26 39 17.6 21.3R 98XY95 709 Ca7793 1999 02 09.19602 05 11 16.95 +26 39 18.2 22.3R 98XY95 709 Ca7793 1999 02 09.20162 05 11 16.81 +26 39 17.7 21.8R 98XY95 709 Ca7793 1999 02 09.24669 05 11 16.69 +26 39 17.9 21.4R 98XY95 709 Ca7793 1999 02 09.25229 05 11 16.76 +26 39 17.7 21.5R 98XY95 709 Ca7793 1999 02 10.11227 05 11 15.09 +26 39 10.8 22.5R 98XY95 709 Ca7793 1999 02 10.15723 05 11 15.04 +26 39 10.7 22.5R 98XY95 709 Ca7793 1999 02 10.20213 05 11 14.90 +26 39 09.9 21.3R 98XY95 709 Ca7793 1999 02 10.23580 05 11 14.85 +26 39 10.1 21.2R 98XY95 709 Ca7793 1999 11 30.35300 05 22 55.21 +27 00 12.0 22.3V 98XY95 695 Ca7793 1999 11 30.36009 05 22 55.17 +27 00 11.9 22.3V 98XY95 695 Ca7793 1999 11 30.51407 05 22 54.36 +27 00 11.7 23.6V 98XY95 695 Ca7793 1999 11 30.52117 05 22 54.33 +27 00 11.7 22.8V 98XY95 695 Ca7793 1999 12 07.34787 05 22 18.38 +26 59 57.1 22.0R 98XY95 709 Ca8501 1999 12 07.39154 05 22 18.23 +26 59 57.0 21.8R 98XY95 709 Ca8501 1999 12 13.27262 05 21 46.74 +26 59 39.6 22.9R 98XY95 709 Ca7793 1999 12 13.31629 05 21 46.33 +26 59 38.9 22.6R 98XY95 709 Ca7793 1999 12 13.35995 05 21 46.18 +26 59 37.9 23.1R 98XY95 709 Ca7793 1999 12 13.40362 05 21 45.86 +26 59 38.2 22.3R 98XY95 709 Ca7793 2000 01 29.11885 05 18 08.78 +26 55 37.2 98XY95 705 Ca9919 2000 01 29.14444 05 18 08.73 +26 55 36.8 98XY95 705 Ca9919 2000 01 29.17582 05 18 08.64 +26 55 36.7 98XY95 705 Ca9919 2000 11 28.43001 05 29 36.66 +27 13 49.7 22.7R 98XY95 695 Cc3588 2000 11 29.32058 05 29 32.07 +27 13 49.2 22.8R 98XY95 695 Cc3588 2000 11 29.42294 05 29 31.54 +27 13 49.1 22.5R 98XY95 695 Cc3588 2001 11 21.32534 05 36 55.98 +27 26 20.4 98XY95 696 Ce1624 2001 11 21.34685 05 36 55.89 +27 26 20.9 98XY95 696 Ce1624 2007 09 16.51956 06 20 47.00 +28 07 37.6 22.5R 98XY95 675 Cy6664 2007 09 17.46998 06 20 49.22 +28 07 44.2 98XY95 675 Cy6664
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 -0.33 0.00 -1.02 2 0.0003 -7.23 0.49 0.26 -0.93 3 0.0004 -10.58 0.37 0.42 -0.84 4 0.0026 -67.61 -0.05 1.33 -0.86 5 0.0035 -91.09 0.08 1.75 -0.86 6 0.0991 -2359.01 0.39 -12.88 0.06 7 0.1019 -2413.30 -0.06 -15.48 -0.53 8 0.1020 -2416.75 -1.08 -14.99 0.05 9 0.1021 -2417.53 0.58 -16.23 -1.10 10 0.1022 -2421.08 -0.51 -15.24 -0.01 11 0.1593 -3267.63 0.73 -71.37 0.27 12 0.1594 -3269.79 -0.61 -71.39 0.35 13 0.1595 -3269.77 -0.09 -71.19 0.60 14 0.1596 -3269.99 0.83 -70.57 1.35 15 0.1596 -3271.90 -0.92 -70.91 1.03 16 0.1597 -3273.49 -1.20 -70.57 1.53 17 0.1597 -3272.57 -0.13 -70.85 1.27 18 0.1621 -3295.47 0.33 -75.82 -0.87 19 0.1622 -3296.14 0.90 -75.86 -0.76 20 0.1623 -3298.08 0.21 -76.50 -1.24 21 0.1624 -3298.73 0.48 -76.24 -0.87 22 0.9649 6145.34 -0.33 490.92 0.33 23 0.9649 6144.80 -0.37 490.86 0.24 24 0.9654 6133.97 -0.37 491.33 0.35 25 0.9654 6133.57 -0.28 491.36 0.36 26 0.9841 5652.74 -0.01 506.99 0.64 27 0.9842 5650.73 1.14 507.02 0.59 28 1.0003 5229.31 1.55 516.58 0.74 29 1.0004 5223.79 -0.78 516.23 0.34 30 1.0005 5221.72 0.35 515.36 -0.58 31 1.0007 5217.47 -0.72 515.94 -0.06 32 1.1286 2304.46 -0.47 473.10 0.12 33 1.1286 2303.77 -0.02 472.75 -0.16 34 1.1287 2302.56 0.18 472.73 -0.09 35 1.9617 11552.63 -0.25 1010.12 -0.04 36 1.9641 11491.27 -0.26 1012.62 0.01 37 1.9644 11484.18 -0.14 1012.87 -0.02 38 2.9416 17462.44 0.06 1518.89 0.47 39 2.9416 17461.25 0.28 1519.43 0.93 40 8.7600 53455.87 0.09 4441.24 -0.25 41 8.7626 53486.81 -0.05 4449.80 -0.51
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.
98XY95 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 64.756 64.755 64.756 ecceobj 0.423 0.423 0.423 incobj 6.652 6.652 6.652 qmin 36.425 36.529 36.529 qmax 94.417 93.610 93.649 amean 64.555 63.997 64.346 amin 63.564 63.067 63.483 amax 65.748 65.384 65.418 emean 0.423 0.417 0.420 emin 0.410 0.405 0.409 emax 0.436 0.432 0.432 imean 6.138 6.205 6.237 imin 5.609 5.746 5.744 imax 6.608 6.678 6.736 fracstop 1.000 1.000 1.000 cjmean 3.105 3.105 3.105 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 175.0 175.1 177.0 kozaiamp 180.0 180.0 180.0