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: 07RW326 # Created Wed Dec 25 02:08:55 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 20 observations of 20 # Arc: 13.04y # First observation: 2007/09/06 # Last observation: 2020/09/21 # Chi-squared of fit: 26.09 DOF: 34 RMS: 0.20 # Min/Max residuals: -0.50 0.38 # Exact a, adot, b, bdot, g, gdot: 1.897407E-05 3.435175E-02 2.338557E-06 3.050012E-03 2.925522E-02 4.834992E-04 # Covariance matrix: 2.5039E-13 -2.4949E-13 1.9316E-14 -2.1874E-14 9.8800E-14 -5.0386E-13 -2.4949E-13 3.7372E-13 -3.0699E-14 3.3757E-14 -1.7569E-13 7.7778E-13 1.9316E-14 -3.0699E-14 9.7947E-14 -1.2952E-14 3.3431E-14 -6.5462E-14 -2.1874E-14 3.3757E-14 -1.2952E-14 7.7578E-15 -1.6753E-14 7.1172E-14 9.8800E-14 -1.7569E-13 3.3431E-14 -1.6753E-14 5.6291E-13 -3.8975E-13 -5.0386E-13 7.7778E-13 -6.5462E-14 7.1172E-14 -3.8975E-13 1.6400E-12 # lat0 lon0 xBary yBary zBary JD0 20.469678 -20.349741 -0.067754 0.351628 -0.941834 2454349.803924 # Heliocentric elements and errors Epoch: 2454350.5000 = 2007/09/07 Mean Anomaly: 3.00512 +/- 0.006 Argument of Peri: 71.43589 +/- 0.010 Long of Asc Node: 264.18532 +/- 0.000 Inclination: 20.49040 +/- 0.000 Eccentricity: 0.23771705 +/- 0.0001 Semi-Major Axis: 46.04662343 +/- 0.0083 Time of Perihelion: 2453397.8034 +/- 1.8 Perihelion: 35.10055577 +/- 0.0084 Aphelion: 56.99269110 +/- 0.0117 Period (y) 312.4675 +/- 0.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 30.99037918 +/- 0.0008 Ecliptic Y -11.42648104 +/- 0.0003 Ecliptic Z 11.95392362 +/- 0.0003 Ecliptic XDOT 0.00107040 +/- 0.0000 Ecliptic YDOT 0.00303251 +/- 0.0000 Ecliptic ZDOT 0.00028314 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 35.12639479 +/- 0.0007 Geocenter to KBO 34.18196302 +/- 0.0009 # Hcoef: 8.73
The following table shows the complete astrometric record for 07RW326. 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 (07RW326) followed by the observatory code and reference code for the source of the astrometry.
2007 09 06.30317 22 13 59.14 +11 01 35.1 23.6r 07RW326 568 C~1Q3a 2007 09 06.34456 22 13 58.94 +11 01 33.7 23.8r 07RW326 568 C~1Q3a 2007 09 06.38735 22 13 58.71 +11 01 32.3 07RW326 568 C~1Q3a 2007 09 18.30378 22 12 58.92 +10 54 29.4 23.8R 07RW326 675 C~1Q3a 2007 09 18.36265 22 12 58.65 +10 54 27.0 07RW326 675 C~1Q3a 2007 09 18.36765 22 12 58.61 +10 54 26.6 07RW326 675 C~1Q3a 2008 08 30.31685 22 21 42.60 +11 58 56.2 23.8r 07RW326 568 C~1Q3a 2008 08 30.32020 22 21 42.58 +11 58 56.1 24.2r 07RW326 568 C~1Q3a 2008 08 30.34776 22 21 42.43 +11 58 54.6 24.2r 07RW326 568 C~1Q3a 2008 08 30.35109 22 21 42.40 +11 58 55.1 24.1r 07RW326 568 C~1Q3a 2008 08 30.37880 22 21 42.26 +11 58 53.9 24.2r 07RW326 568 C~1Q3a 2008 08 30.38213 22 21 42.22 +11 58 54.3 24.2r 07RW326 568 C~1Q3a 2008 08 31.29921 22 21 37.35 +11 58 27.4 07RW326 568 C~59eo 2008 08 31.30254 22 21 37.34 +11 58 27.6 07RW326 568 C~1Q3a 2008 10 22.10211 22 17 58.38 +11 24 42.7 24.2r 07RW326 695 C~1Q3a 2008 10 22.20202 22 17 58.13 +11 24 38.6 24.0r 07RW326 695 C~1Q3a 2009 06 21.35041 22 33 32.89 +12 52 06.8 07RW326 695 C~1Q3a 2009 06 21.43131 22 33 32.79 +12 52 09.1 07RW326 695 C~1Q3a 2020 09 21.149750 23 48 21.074 +21 21 08.55 25.0G 07RW326 G37 C~49WY 2020 09 21.200280 23 48 20.804 +21 21 06.82 07RW326 G37 C~49WY
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 -0.02 0.00 -0.16
2 0.0001 0.00 0.26 0.00 -0.22
3 0.0002 0.00 0.22 0.00 -0.22
4 0.0329 0.00 0.01 0.00 0.13
5 0.0330 0.00 0.25 0.00 -0.02
6 0.0330 0.00 0.01 0.00 -0.23
7 0.9829 0.00 0.05 0.00 0.23
8 0.9829 0.00 0.03 0.00 0.22
9 0.9830 0.00 0.01 0.00 -0.50
10 0.9830 0.00 -0.17 0.00 0.10
11 0.9831 0.00 -0.01 0.00 -0.31
12 0.9831 0.00 -0.34 0.00 0.18
13 0.9856 0.00 -0.26 0.00 -0.26
14 0.9856 0.00 -0.14 0.00 0.03
15 1.1274 0.00 -0.06 0.00 0.19
16 1.1277 0.00 -0.12 0.00 0.31
17 1.7907 0.00 -0.03 0.00 0.38
18 1.7909 0.00 0.17 0.00 0.29
19 13.0427 0.00 -0.02 0.00 0.01
20 13.0428 0.00 0.05 0.00 -0.12
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.
07RW326 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 46.204 46.204 46.204 ecceobj 0.240 0.240 0.240 incobj 20.516 20.516 20.516 qmin 34.437 34.393 34.328 qmax 58.121 58.139 58.201 amean 46.012 45.998 46.007 amin 45.549 45.565 45.561 amax 46.530 46.532 46.537 emean 0.228 0.231 0.232 emin 0.210 0.212 0.214 emax 0.250 0.251 0.252 imean 22.338 22.257 22.221 imin 21.657 21.597 21.469 imax 22.981 22.834 22.834 excite_mean 0.444 0.443 0.444 fracstop 1.000 1.000 1.000 cjmean 2.880 2.880 2.880 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 174.4 178.0 179.8 kozaiamp 180.0 180.0 179.9