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: 06AL98
# Created Tue Apr 1 01:08:51 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 24 observations of 24
# Arc: 7.87y
# First observation: 2005/04/05
# Last observation: 2013/02/17
# Chi-squared of fit: 56.02 DOF: 42 RMS: 0.27
# Min/Max residuals: -0.67 0.75
# Exact a, adot, b, bdot, g, gdot:
1.884113E-05 3.271627E-02 4.110023E-06 6.032312E-03 2.751236E-02 -5.481774E-03
# Covariance matrix:
5.3675E-13 -5.2163E-13 6.3964E-14 -8.8028E-14 -1.1374E-13 -1.5766E-12
-5.2163E-13 1.1367E-12 -1.4451E-13 2.0090E-13 -2.5038E-13 3.5615E-12
6.3964E-14 -1.4451E-13 1.2145E-13 -4.3253E-14 3.2655E-14 -4.5591E-13
-8.8028E-14 2.0090E-13 -4.3253E-14 4.3469E-14 -4.6369E-14 6.3388E-13
-1.1374E-13 -2.5038E-13 3.2655E-14 -4.6369E-14 2.9925E-13 -8.0459E-13
-1.5766E-12 3.5615E-12 -4.5591E-13 6.3388E-13 -8.0459E-13 1.1236E-11
# lat0 lon0 xBary yBary zBary JD0
0.257908 124.783475 -0.940955 0.001571 -0.327428 2453465.819512
# Heliocentric elements and errors
Epoch: 2453466.5000 = 2005/04/06
Mean Anomaly: 349.61259 +/- 0.009
Argument of Peri: 28.77913 +/- 0.023
Long of Asc Node: 124.86526 +/- 0.000
Inclination: 10.39183 +/- 0.000
Eccentricity: 0.41952697 +/- 0.0001
Semi-Major Axis: 61.11570995 +/- 0.0122
Time of Perihelion: 2458501.8834 +/- 50.9
Perihelion: 35.47602153 +/- 0.0087
Aphelion: 86.75539838 +/- 0.0180
Period (y) 477.7905 +/- 0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -21.69956295 +/- 0.0004
Ecliptic Y 29.58360164 +/- 0.0006
Ecliptic Z 0.16377243 +/- 0.0000
Ecliptic XDOT -0.00236089 +/- 0.0000
Ecliptic YDOT -0.00231467 +/- 0.0000
Ecliptic ZDOT 0.00059789 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 36.68916071 +/- 0.0005
Geocenter to KBO 36.34747055 +/- 0.0007
# Hcoef: 8.96
The following table shows the complete astrometric record for 06AL98. 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 (06AL98) followed by the observatory code and reference code for the source of the astrometry.
2005 04 05.318769 08 28 46.46 +19 19 08.2 06AL98 T14 C~63RQ 2005 04 06.264504 08 28 45.58 +19 19 14.3 06AL98 T14 C~63RQ 2006 01 04.584192 08 43 27.52 +18 41 53.2 06AL98 T09 C~63RQ 2006 01 04.616615 08 43 27.36 +18 41 54.2 06AL98 T09 C~63RQ 2006 01 04.642039 08 43 27.23 +18 41 54.7 06AL98 T09 C~63RQ 2006 01 05.53253 08 43 22.80 +18 42 15.6 06AL98 568 Cq2894 2006 01 05.550882 08 43 22.76 +18 42 15.5 24.0r 06AL98 T09 C~63RQ 2006 01 05.57222 08 43 22.61 +18 42 16.7 06AL98 568 Cq2894 2006 01 06.62466 08 43 17.41 +18 42 41.1 24.4R 06AL98 568 Cq2894 2006 01 06.64615 08 43 17.31 +18 42 41.5 24.6R 06AL98 568 Cq2894 2006 02 01.285879 08 40 59.29 +18 53 01.6 06AL98 T09 C~63RQ 2006 02 01.297992 08 40 59.22 +18 53 02.0 06AL98 T09 C~63RQ 2006 02 01.311248 08 40 59.13 +18 53 02.4 06AL98 T09 C~63RQ 2006 02 02.286789 08 40 53.76 +18 53 25.9 06AL98 T09 C~63RQ 2006 02 02.298161 08 40 53.71 +18 53 26.2 06AL98 T09 C~63RQ 2006 02 02.309443 08 40 53.64 +18 53 26.6 06AL98 T09 C~63RQ 2006 05 27.256727 08 38 17.59 +19 08 24.1 06AL98 T09 C~63RQ 2006 05 27.270547 08 38 17.66 +19 08 23.9 06AL98 T09 C~63RQ 2006 11 24.575658 08 53 54.06 +18 19 31.3 06AL98 T14 C~63RQ 2006 11 24.627841 08 53 53.99 +18 19 31.8 06AL98 T14 C~63RQ 2013 02 16.149266 09 38 30.65 +17 20 20.2 06AL98 W84 C~63RQ 2013 02 17.186687 09 38 25.06 +17 20 51.3 06AL98 W84 C~63RQ 2013 02 17.197453 09 38 24.99 +17 20 51.4 06AL98 W84 C~63RQ 2013 02 17.208212 09 38 24.91 +17 20 51.5 06AL98 W84 C~63RQ
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 -0.04 0.00 -0.13
2 0.0026 0.00 0.02 0.00 -0.07
3 0.7509 0.00 0.09 0.00 -0.32
4 0.7510 0.00 0.12 0.00 -0.05
5 0.7511 0.00 0.07 0.00 -0.12
6 0.7535 0.00 -0.67 0.00 0.39
7 0.7535 0.00 0.12 0.00 -0.13
8 0.7536 0.00 -0.51 0.00 0.59
9 0.7565 0.00 0.18 0.00 0.75
10 0.7565 0.00 0.31 0.00 0.66
11 0.8267 0.00 0.17 0.00 -0.24
12 0.8268 0.00 0.13 0.00 -0.14
13 0.8268 0.00 -0.11 0.00 -0.07
14 0.8295 0.00 0.02 0.00 -0.31
15 0.8295 0.00 0.22 0.00 -0.29
16 0.8295 0.00 0.11 0.00 -0.17
17 1.1415 0.00 -0.31 0.00 -0.24
18 1.1416 0.00 -0.15 0.00 -0.24
19 1.6379 0.00 0.12 0.00 0.05
20 1.6381 0.00 0.05 0.00 0.04
21 7.8681 0.00 -0.07 0.00 -0.08
22 7.8710 0.00 0.23 0.00 0.25
23 7.8710 0.00 0.07 0.00 0.03
24 7.8710 0.00 -0.25 0.00 -0.19
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.
06AL98 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 60.684 60.684 60.685 ecceobj 0.414 0.414 0.414 incobj 10.404 10.404 10.404 qmin 34.473 34.614 34.522 qmax 89.239 90.005 89.821 amean 60.881 61.394 61.044 amin 59.810 59.848 59.837 amax 62.313 62.712 62.595 emean 0.419 0.422 0.420 emin 0.406 0.406 0.406 emax 0.434 0.438 0.437 imean 8.412 8.818 8.467 imin 7.537 8.136 7.617 imax 9.055 9.632 9.226 excite_mean 0.444 0.449 0.445 fracstop 1.000 1.000 1.000 cjmean 3.048 3.049 3.049 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 164.6 179.8 179.2 kozaiamp 180.0 179.9 179.9