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: 09JC19 # Created Sun Dec 22 02:09:04 2024 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 10.89d # First observation: 2009/05/15 # Last observation: 2009/05/26 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.015367 -0.000001 -0.007179 0.019931 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 1.54 DOF: 17 RMS: 0.07 # Min/Max residuals: -0.09 0.15 # Exact a, adot, b, bdot, g, gdot: 1.144955E-05 1.424293E-02 -6.569559E-06 -7.658476E-03 1.966414E-02 -1.335011E-03 # Covariance matrix: 3.1814E-12 1.4098E-09 2.1689E-13 5.5724E-10 4.0963E-10 2.3231E-09 1.4098E-09 7.9065E-07 1.3677E-10 3.0492E-07 2.2640E-07 3.9054E-06 2.1689E-13 1.3677E-10 6.3351E-13 2.6925E-11 3.7881E-11 -1.8316E-09 5.5724E-10 3.0492E-07 2.6925E-11 1.1923E-07 8.7565E-08 1.6701E-06 4.0963E-10 2.2640E-07 3.7881E-11 8.7565E-08 6.4844E-08 9.1824E-07 2.3231E-09 3.9054E-06 -1.8316E-09 1.6701E-06 9.1824E-07 -3.5422E-04 # lat0 lon0 xBary yBary zBary JD0 15.618060 -175.244079 -0.768755 0.176047 -0.629884 2454966.970345 # Heliocentric elements and errors Epoch: 2454960.5000 = 2009/05/09 Mean Anomaly: 215.16325 +/- 315.120 Argument of Peri: 302.53801 +/- 302.538 Long of Asc Node: 31.74017 +/- 2.344 Inclination: 32.09519 +/- 2.149 Eccentricity: 0.13393521 +/- 0.1339 Semi-Major Axis: 46.19569162 +/- 46.1957 Time of Perihelion: 2501100.4268 +/- 9999999.9 Perihelion: 40.00846184 +/- 40.4841 Aphelion: 52.38292140 +/- 52.7471 Period (y) 313.9861 +/- 470.98 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -49.39297668 +/- 0.6321 Ecliptic Y -4.88566045 +/- 0.0525 Ecliptic Z 13.69081330 +/- 0.1773 Ecliptic XDOT 0.00006169 +/- 0.0001 Ecliptic YDOT -0.00198116 +/- -0.0020 Ecliptic ZDOT -0.00107707 +/- -0.0011 # Distances at JD0 (AU) Heliocenter to KBO 51.48761202 +/- 0.6082 Geocenter to KBO 50.85400340 +/- 0.6585 # Hcoef: 7.44
The following table shows the complete astrometric record for 09JC19. 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 (09JC19) followed by the observatory code and reference code for the source of the astrometry.
2009 05 15.469579 12 42 34.204 +12 25 47.68 09JC19 568 C~0aRU 2009 05 20.259695 12 42 21.287 +12 25 32.98 24.3i 09JC19 568 C~0aRU 2009 05 20.297904 12 42 21.182 +12 25 32.86 24.4i 09JC19 568 C~0aRU 2009 05 20.331223 12 42 21.103 +12 25 32.72 24.0i 09JC19 568 C~0aRU 2009 05 20.364003 12 42 21.014 +12 25 32.61 23.9i 09JC19 568 C~0aRU 2009 05 20.401995 12 42 20.912 +12 25 32.41 24.0i 09JC19 568 C~0aRU 2009 05 25.324834 12 42 09.006 +12 25 03.90 25.2g 09JC19 568 C~0aRU 2009 05 25.372759 12 42 08.888 +12 25 03.46 25.3g 09JC19 568 C~0aRU 2009 05 26.266896 12 42 06.890 +12 24 56.84 25.6g 09JC19 568 C~0aRU 2009 05 26.314666 12 42 06.781 +12 24 56.36 25.0g 09JC19 568 C~0aRU 2009 05 26.362558 12 42 06.688 +12 24 56.13 25.3g 09JC19 568 C~0aRU
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 0.00 0.00 0.08
2 0.0131 -166.97 0.02 -90.22 -0.08
3 0.0132 -168.32 -0.06 -90.96 -0.06
4 0.0133 -169.33 0.06 -91.56 -0.00
5 0.0134 -170.47 0.01 -92.18 0.01
6 0.0135 -171.76 -0.01 -92.97 -0.03
7 0.0270 -319.61 -0.03 -189.78 0.07
8 0.0271 -321.01 -0.08 -190.88 -0.05
9 0.0296 -345.08 -0.05 -208.81 0.01
10 0.0297 -346.34 -0.01 -209.89 -0.09
11 0.0298 -347.50 0.15 -210.66 0.13
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.
09JC19 quality flag:1 Type: SCATEXTD SCATNEAR SCATEXTD axisobj 46.105 55.199 44.525 ecceobj 0.134 0.306 0.200 incobj 32.179 25.881 36.329 qmin 39.546 37.422 33.987 qmax 53.489 74.872 55.759 amean 46.339 55.690 44.651 amin 45.966 55.077 44.263 amax 46.749 56.452 45.104 emean 0.130 0.304 0.213 emin 0.118 0.282 0.186 emax 0.144 0.327 0.237 imean 31.653 25.375 35.590 imin 31.464 24.693 35.062 imax 31.869 26.123 36.162 excite_mean 0.541 0.526 0.620 fracstop 1.000 1.000 1.000 cjmean 2.744 2.881 2.610 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 171.0 182.7 180.9 kozaiamp 180.0 179.9 180.0