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: 99RC216
# Created Wed Nov 27 02:08:01 2024
# Orbit generated from Bernstein formalism
# Fitting 10 observations of 10
# Arc: 61.91d
# First observation: 1999/09/08
# Last observation: 1999/11/09
Preliminary a, adot, b, bdot, g, gdot:
0.000000 0.026061 0.000000 -0.000175 0.022503 0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit: 9.85 DOF: 15 RMS: 0.18
# Min/Max residuals: -0.34 0.36
# Exact a, adot, b, bdot, g, gdot:
1.493810E-05 1.947201E-02 4.664592E-07 -1.826444E-04 2.144579E-02 -5.805659E-03
# Covariance matrix:
5.3531E-13 4.1766E-10 -8.0217E-15 5.7106E-13 6.0891E-11 -4.8918E-09
4.1766E-10 8.0131E-07 -1.5489E-11 1.1048E-09 1.1494E-07 -9.7983E-06
-8.0217E-15 -1.5489E-11 2.7265E-13 -2.0979E-12 -2.2205E-12 1.8992E-10
5.7106E-13 1.1048E-09 -2.0979E-12 3.6029E-11 1.5837E-10 -1.3553E-08
6.0891E-11 1.1494E-07 -2.2205E-12 1.5837E-10 1.6499E-08 -1.4018E-06
-4.8918E-09 -9.7983E-06 1.8992E-10 -1.3553E-08 -1.4018E-06 1.2117E-04
# lat0 lon0 xBary yBary zBary JD0
0.162241 -4.932784 0.172392 0.002563 -0.985685 2451429.949873
# Heliocentric elements and errors
Epoch: 2451420.5000 = 1999/08/30
Mean Anomaly: 303.92295 +/- 52.542
Argument of Peri: 253.68125 +/- 14.393
Long of Asc Node: 191.40631 +/- 0.890
Inclination: 0.55805 +/- 0.029
Eccentricity: 0.30263229 +/- 0.5712
Semi-Major Axis: 52.36181601 +/- 23.2677
Time of Perihelion: 2472978.2356 +/- 14195.5
Perihelion: 36.51543984 +/- 34.0259
Aphelion: 68.20819218 +/- 42.5808
Period (y) 378.9049 +/- 252.56
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 47.43127923 +/- 0.2782
Ecliptic Y -4.26341776 +/- 0.0240
Ecliptic Z 0.13207099 +/- 0.0008
Ecliptic XDOT -0.00052870 +/- 0.0014
Ecliptic YDOT 0.00254870 +/- 0.0002
Ecliptic ZDOT -0.00002535 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 47.62268811 +/- 0.2771
Geocenter to KBO 46.62920598 +/- 0.2793
# Hcoef: 7.32
The following table shows the complete astrometric record for 99RC216. 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 (99RC216) followed by the observatory code and reference code for the source of the astrometry.
1999 09 08.44913 23 41 37.95 -01 48 40.2 23.6R 99RC216 568 Cb0837 1999 09 08.49088 23 41 37.80 -01 48 41.2 23.6R 99RC216 568 Cb0837 1999 09 08.53309 23 41 37.61 -01 48 41.9 23.6R 99RC216 568 Cb0837 1999 09 10.42682 23 41 30.22 -01 49 30.0 23.6R 99RC216 568 Cb0837 1999 09 10.43726 23 41 30.20 -01 49 30.7 23.6R 99RC216 568 Cb0837 1999 10 10.34124 23 39 34.45 -02 02 04.2 23.6R 99RC216 568 Cb0837 1999 10 10.38373 23 39 34.27 -02 02 05.0 23.9R 99RC216 568 Cb0837 1999 10 10.44464 23 39 34.05 -02 02 06.0 24.3R 99RC216 568 Cb0837 1999 11 09.30683 23 38 05.83 -02 11 44.5 23.5R 99RC216 568 Cb0837 1999 11 09.35578 23 38 05.72 -02 11 45.0 24.1R 99RC216 568 Cb0837
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 -0.12 0.00 -0.12
2 0.0001 -2.46 0.12 -0.03 -0.17
3 0.0002 -5.35 -0.05 0.46 0.31
4 0.0054 -126.14 -0.04 0.23 0.26
5 0.0054 -126.69 0.09 -0.29 -0.27
6 0.0873 -2018.55 0.08 -4.29 -0.34
7 0.0874 -2021.35 -0.16 -3.96 -0.02
8 0.0876 -2024.77 0.07 -3.57 0.36
9 0.1694 -3468.41 -0.02 -10.92 -0.09
10 0.1695 -3470.12 0.02 -10.73 0.09
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.
99RC216 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0