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: 08TA239 # Created Sun Dec 22 02:09:03 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 20 observations of 20 # Arc: 12.26y # First observation: 2007/11/09 # Last observation: 2020/02/11 # Chi-squared of fit: 29.57 DOF: 34 RMS: 0.21 # Min/Max residuals: -0.49 0.76 # Exact a, adot, b, bdot, g, gdot: 1.790993E-05 3.134761E-02 2.076179E-07 3.166243E-04 2.856866E-02 -9.298761E-04 # Covariance matrix: 3.2183E-13 4.0259E-15 -1.5983E-14 1.9806E-14 -3.4026E-13 1.5577E-13 4.0259E-15 5.0579E-13 -7.2457E-14 7.4247E-14 -8.1968E-13 1.5873E-12 -1.5983E-14 -7.2457E-14 1.5146E-13 -2.7398E-14 1.4079E-13 -2.3604E-13 1.9806E-14 7.4247E-14 -2.7398E-14 1.6519E-14 -1.5011E-13 2.4365E-13 -3.4026E-13 -8.1968E-13 1.4079E-13 -1.5011E-13 1.8644E-12 -2.7531E-12 1.5577E-13 1.5873E-12 -2.3604E-13 2.4365E-13 -2.7531E-12 5.0697E-12 # lat0 lon0 xBary yBary zBary JD0 -33.119531 36.261439 -0.182059 -0.534124 -0.818901 2454414.041677 # Heliocentric elements and errors Epoch: 2454414.5000 = 2007/11/10 Mean Anomaly: 346.92634 +/- 0.064 Argument of Peri: 287.11077 +/- 0.076 Long of Asc Node: 125.04732 +/- 0.000 Inclination: 32.27704 +/- 0.000 Eccentricity: 0.09319439 +/- 0.0002 Semi-Major Axis: 39.37838387 +/- 0.0102 Time of Perihelion: 2457692.2808 +/- 37.5 Perihelion: 35.70853923 +/- 0.0115 Aphelion: 43.04822850 +/- 0.0131 Period (y) 247.1127 +/- 0.10 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 24.31845752 +/- 0.0011 Ecliptic Y 18.06051338 +/- 0.0008 Ecliptic Z -19.12542399 +/- 0.0009 Ecliptic XDOT -0.00181739 +/- 0.0000 Ecliptic YDOT 0.00238692 +/- 0.0000 Ecliptic ZDOT 0.00007400 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 35.82390781 +/- 0.0010 Geocenter to KBO 35.00343426 +/- 0.0017 # Hcoef: 7.58
The following table shows the complete astrometric record for 08TA239. 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 (08TA239) followed by the observatory code and reference code for the source of the astrometry.
2007 11 09.540923 02 59 24.42 -17 42 47.3 23.3i 08TA239 T14 C~66zf 2008 10 02.276794 03 09 39.606 -16 43 20.72 23.3r 08TA239 309 C~66zf 2008 10 02.278257 03 09 39.601 -16 43 20.75 23.3r 08TA239 309 C~66zf 2008 10 02.282302 03 09 39.590 -16 43 20.94 08TA239 309 C~66zf 2008 10 02.286132 03 09 39.568 -16 43 21.11 08TA239 309 C~66zf 2008 10 02.289991 03 09 39.556 -16 43 21.27 08TA239 309 C~66zf 2008 10 02.293829 03 09 39.541 -16 43 21.49 08TA239 309 C~66zf 2008 10 02.297684 03 09 39.530 -16 43 21.69 08TA239 309 C~66zf 2008 10 07.611547 03 09 16.78 -16 47 25.9 23.5g 08TA239 T14 C~66zf 2008 10 07.617029 03 09 16.75 -16 47 26.4 08TA239 T14 C~66zf 2008 10 27.22275 03 07 38.02 -16 59 48.6 08TA239 807 C~66zf 2008 10 27.33402 03 07 37.40 -16 59 52.1 08TA239 807 C~66zf 2008 11 02.525758 03 07 02.99 -17 02 41.8 22.6i 08TA239 T14 C~66zf 2008 11 02.532128 03 07 02.94 -17 02 42.0 08TA239 T14 C~66zf 2014 09 20.356162 03 51 31.69 -12 27 30.1 23.7g 08TA239 W84 C~66zf 2014 09 20.357528 03 51 31.69 -12 27 30.4 23.2r 08TA239 W84 C~66zf 2014 09 20.358903 03 51 31.70 -12 27 30.1 22.9z 08TA239 W84 C~66zf 2020 02 11.078482 04 15 00.34 -08 52 06.5 22.5i 08TA239 W84 C~66zf 2020 02 11.123487 04 15 00.32 -08 52 04.1 08TA239 W84 C~66zf 2020 02 11.125520 04 15 00.31 -08 52 03.9 08TA239 W84 C~66zf
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 -0.05
2 0.8973 0.00 -0.10 0.00 -0.06
3 0.8973 0.00 -0.08 0.00 -0.02
4 0.8973 0.00 0.01 0.00 -0.01
5 0.8973 0.00 -0.08 0.00 -0.00
6 0.8973 0.00 -0.02 0.00 0.02
7 0.8973 0.00 -0.01 0.00 -0.02
8 0.8973 0.00 0.07 0.00 -0.04
9 0.9119 0.00 0.02 0.00 0.30
10 0.9119 0.00 -0.05 0.00 0.04
11 0.9656 0.00 -0.49 0.00 0.15
12 0.9659 0.00 -0.49 0.00 -0.01
13 0.9828 0.00 0.76 0.00 -0.02
14 0.9829 0.00 0.55 0.00 -0.07
15 6.8633 0.00 -0.01 0.00 -0.14
16 6.8633 0.00 0.03 0.00 -0.37
17 6.8633 0.00 0.22 0.00 -0.01
18 12.2561 0.00 -0.11 0.00 0.04
19 12.2562 0.00 0.06 0.00 0.07
20 12.2562 0.00 -0.07 0.00 0.17
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.
08TA239 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.833 39.833 39.833 ecceobj 0.103 0.103 0.103 incobj 32.267 32.267 32.267 qmin 33.362 33.363 33.361 qmax 45.884 45.884 45.884 amean 39.456 39.456 39.456 amin 39.098 39.098 39.098 amax 39.840 39.840 39.839 emean 0.113 0.113 0.113 emin 0.070 0.070 0.070 emax 0.154 0.154 0.154 imean 30.480 30.480 30.480 imin 29.897 29.897 29.898 imax 31.013 31.013 31.013 excite_mean 0.520 0.520 0.520 fracstop 1.000 1.000 1.000 cjmean 2.724 2.724 2.724 libcent 0 179.7 179.7 179.6 libamp 0 77.6 77.6 77.7 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 180.7 180.7 180.7 kozaiamp 179.9 179.9 179.9