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: 04KV18 # Created Wed Apr 17 01:11:47 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 25 observations of 25 # Arc: 17.18y # First observation: 2004/05/24 # Last observation: 2021/07/31 # Chi-squared of fit: 17.30 DOF: 44 RMS: 0.15 # Min/Max residuals: -0.35 0.31 # Exact a, adot, b, bdot, g, gdot: 2.023487E-05 4.838341E-02 5.419636E-06 1.161305E-02 3.898511E-02 6.777695E-03 # Covariance matrix: 1.5337E-13 -6.1597E-14 1.0730E-14 -1.4742E-14 1.3626E-13 -7.6358E-14 -6.1597E-14 5.7396E-14 -1.0813E-14 1.4361E-14 -6.0918E-14 7.1825E-14 1.0730E-14 -1.0813E-14 8.4772E-14 -8.7516E-15 1.1719E-14 -1.3866E-14 -1.4742E-14 1.4361E-14 -8.7516E-15 5.0893E-15 -1.7975E-14 1.8574E-14 1.3626E-13 -6.0918E-14 1.1719E-14 -1.7975E-14 4.3787E-13 -1.0278E-13 -7.6358E-14 7.1825E-14 -1.3866E-14 1.8574E-14 -1.0278E-13 9.3753E-14 # lat0 lon0 xBary yBary zBary JD0 -1.393470 -130.499878 -0.248520 -0.023824 -0.981520 2453149.860913 # Heliocentric elements and errors Epoch: 2453150.5000 = 2004/05/25 Mean Anomaly: 41.67731 +/- 0.010 Argument of Peri: 295.40541 +/- 0.014 Long of Asc Node: 235.59077 +/- 0.000 Inclination: 13.58016 +/- 0.000 Eccentricity: 0.18911056 +/- 0.0000 Semi-Major Axis: 30.32287248 +/- 0.0027 Time of Perihelion: 2446089.7451 +/- 2.0 Perihelion: 24.58849714 +/- 0.0025 Aphelion: 36.05724782 +/- 0.0034 Period (y) 166.9797 +/- 0.02 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -17.10609601 +/- 0.0003 Ecliptic Y -20.40574921 +/- 0.0003 Ecliptic Z -0.62361434 +/- 0.0000 Ecliptic XDOT 0.00225918 +/- 0.0000 Ecliptic YDOT -0.00259062 +/- 0.0000 Ecliptic ZDOT 0.00080387 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 26.63452595 +/- 0.0003 Geocenter to KBO 25.65078384 +/- 0.0004 # Hcoef: 8.69
The following table shows the complete astrometric record for 04KV18. 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 (04KV18) followed by the observatory code and reference code for the source of the astrometry.
2004 05 24.36017 15 06 36.12 -18 56 49.5 23.5g 04KV18 568 C~07Xq 2004 05 24.38333 15 06 35.95 -18 56 48.6 23.8g 04KV18 568 C~07Xq 2004 05 24.40770 15 06 35.77 -18 56 47.8 23.8g 04KV18 568 C~07Xq 2004 05 25.36907 15 06 29.05 -18 56 13.5 23.9g 04KV18 568 C~07Xq 2004 06 10.28202 15 04 45.65 -18 47 05.7 22.5i 04KV18 568 C~0X5W 2004 06 10.29034 15 04 45.60 -18 47 05.5 22.8i 04KV18 568 C~0X5W 2004 06 10.35397 15 04 45.21 -18 47 03.3 22.9i 04KV18 568 C~0X5W 2004 06 10.42113 15 04 44.80 -18 47 01.2 22.8i 04KV18 568 C~0X5W 2005 05 14.39021 15 19 49.14 -19 08 12.8 04KV18 568 C~0X5W 2005 05 14.42394 15 19 48.89 -19 08 11.6 22.9R 04KV18 568 C~0X5W 2005 05 14.46270 15 19 48.61 -19 08 10.4 22.6R 04KV18 568 C~0X5W 2005 07 12.02961 15 14 16.60 -18 39 47.2 22.6R 04KV18 809 C~0X5W 2005 07 12.07765 15 14 16.46 -18 39 46.5 22.7R 04KV18 809 C~0X5W 2005 07 12.12861 15 14 16.32 -18 39 45.4 22.8R 04KV18 809 C~0X5W 2005 07 13.07431 15 14 13.81 -18 39 28.2 22.8R 04KV18 809 C~0X5W 2005 08 02.01982 15 13 49.84 -18 35 17.7 04KV18 309 C~0X5W 2005 08 02.11937 15 13 49.87 -18 35 17.0 04KV18 309 C~0X5W 2005 08 03.11032 15 13 50.19 -18 35 10.5 04KV18 309 C~0X5W 2006 05 02.37141 15 33 07.62 -19 17 02.3 21.9r 04KV18 695 C~0X5W 2006 05 02.44260 15 33 07.12 -19 16 59.9 22.2r 04KV18 695 C~0X5W 2016 05 29.36303 17 17 46.632 -17 17 09.23 22.5R 04KV18 G37 C~2bkb 2016 05 29.42410 17 17 46.212 -17 17 08.18 04KV18 G37 C~2bkb 2021 07 31.06106 17 58 11.106 -15 18 15.87 04KV18 304 c~5RlF 2021 07 31.06432 17 58 11.086 -15 18 15.91 04KV18 304 c~5RlF 2021 07 31.06839 17 58 11.068 -15 18 16.02 04KV18 304 c~5RlF
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 -0.17 0.00 -0.11
2 0.0001 0.00 -0.23 0.00 -0.04
3 0.0001 0.00 -0.32 0.00 -0.11
4 0.0028 0.00 -0.35 0.00 -0.25
5 0.0463 0.00 0.19 0.00 -0.00
6 0.0464 0.00 0.19 0.00 -0.07
7 0.0465 0.00 0.14 0.00 0.06
8 0.0467 0.00 0.09 0.00 -0.04
9 0.9720 0.00 -0.09 0.00 0.26
10 0.9721 0.00 -0.06 0.00 0.31
11 0.9722 0.00 0.08 0.00 0.18
12 1.1326 0.00 0.09 0.00 0.12
13 1.1327 0.00 0.05 0.00 -0.07
14 1.1328 0.00 0.12 0.00 0.08
15 1.1354 0.00 0.15 0.00 0.06
16 1.1900 0.00 -0.21 0.00 -0.08
17 1.1903 0.00 0.03 0.00 -0.11
18 1.1930 0.00 -0.07 0.00 -0.14
19 1.9384 0.00 0.11 0.00 -0.06
20 1.9386 0.00 0.27 0.00 0.12
21 12.0137 0.00 -0.15 0.00 -0.16
22 12.0139 0.00 -0.09 0.00 -0.03
23 17.1847 0.00 0.06 0.00 0.07
24 17.1847 0.00 0.00 0.00 0.05
25 17.1847 0.00 0.04 0.00 -0.03
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.
04KV18 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 30.031 30.031 30.031 ecceobj 0.182 0.182 0.182 incobj 13.619 13.619 13.619 qmin 22.468 22.651 21.479 qmax 38.591 38.510 38.199 amean 30.194 30.185 29.748 amin 29.367 29.331 28.954 amax 30.933 30.932 30.915 emean 0.218 0.205 0.233 emin 0.182 0.159 0.182 emax 0.248 0.245 0.275 imean 13.571 13.727 12.602 imin 11.858 11.965 10.797 imax 15.051 16.088 14.665 excite_mean 0.321 0.315 0.321 fracstop 0.049 0.053 0.031 cjmean 2.900 2.901 2.900 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 136.4 290.5 185.1 kozaiamp 179.6 179.1 179.8