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: 07TD418 # Created Wed Dec 25 02:08:56 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 31 observations of 31 # Arc: 13.10y # First observation: 2007/10/08 # Last observation: 2020/11/14 # Chi-squared of fit: 22.59 DOF: 56 RMS: 0.15 # Min/Max residuals: -0.28 0.47 # Exact a, adot, b, bdot, g, gdot: 1.742664E-05 2.858306E-02 7.017276E-07 -7.490305E-05 2.612777E-02 -5.041040E-04 # Covariance matrix: 2.4554E-13 -3.3201E-14 -2.2231E-15 -1.6452E-16 2.3370E-13 -6.8728E-14 -3.3201E-14 1.6525E-14 1.2996E-16 -2.3639E-17 -7.2290E-15 4.5522E-14 -2.2231E-15 1.2996E-16 1.1963E-13 -1.3872E-14 -4.6767E-15 5.3859E-16 -1.6452E-16 -2.3639E-17 -1.3872E-14 2.6110E-15 -4.3305E-16 -6.6376E-17 2.3370E-13 -7.2290E-15 -4.6767E-15 -4.3305E-16 5.0844E-13 -3.6069E-14 -6.8728E-14 4.5522E-14 5.3859E-16 -6.6376E-17 -3.6069E-14 1.4923E-13 # lat0 lon0 xBary yBary zBary JD0 -15.469545 28.727430 0.241976 -0.259030 -0.936393 2454381.756514 # Heliocentric elements and errors Epoch: 2454382.5000 = 2007/10/09 Mean Anomaly: 354.51442 +/- 0.005 Argument of Peri: 277.33831 +/- 0.007 Long of Asc Node: 119.19292 +/- 0.000 Inclination: 15.09324 +/- 0.000 Eccentricity: 0.18692547 +/- 0.0001 Semi-Major Axis: 48.14601549 +/- 0.0071 Time of Perihelion: 2456241.8397 +/- 26.5 Perihelion: 39.14629885 +/- 0.0074 Aphelion: 57.14573212 +/- 0.0096 Period (y) 334.0787 +/- 0.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 33.31399094 +/- 0.0009 Ecliptic Y 17.97994296 +/- 0.0005 Ecliptic Z -10.20853883 +/- 0.0003 Ecliptic XDOT -0.00147978 +/- 0.0000 Ecliptic YDOT 0.00259968 +/- 0.0000 Ecliptic ZDOT 0.00000642 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.20861846 +/- 0.0008 Geocenter to KBO 38.27349859 +/- 0.0010 # Hcoef: 7.91
The following table shows the complete astrometric record for 07TD418. 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 (07TD418) followed by the observatory code and reference code for the source of the astrometry.
2007 10 08.25576 02 08 35.01 -03 27 57.1 23.6R 07TD418 807 Cx2653 2007 10 10.32486 02 08 25.60 -03 29 01.3 23.5R 07TD418 807 Cx2653 2007 11 03.24977 02 06 31.16 -03 39 34.1 23.2R 07TD418 807 Cx2654 2007 11 07.26226 02 06 11.92 -03 40 54.7 23.6R 07TD418 807 Cx2654 2007 11 07.27862 02 06 11.84 -03 40 54.9 23.1I 07TD418 807 Cx2654 2007 11 11.12904 02 05 53.70 -03 42 03.8 23.5R 07TD418 807 Cx2654 2007 11 13.07251 02 05 44.70 -03 42 35.6 23.7R 07TD418 807 Cx2654 2007 11 13.10947 02 05 44.53 -03 42 36.1 23.1I 07TD418 807 Cx2654 2007 11 15.07051 02 05 35.55 -03 43 05.3 23.8R 07TD418 807 Cx2654 2007 11 15.10199 02 05 35.41 -03 43 05.8 23.0I 07TD418 807 Cx2654 2007 11 17.10267 02 05 26.40 -03 43 33.5 23.6R 07TD418 807 Cx2654 2014 09 27.299479 02 52 21.28 +00 38 40.2 23.2i 07TD418 W84 C~1Cqe 2014 09 27.303287 02 52 21.29 +00 38 39.9 23.4z 07TD418 W84 C~1Cqe 2014 10 02.271499 02 52 03.26 +00 36 09.4 24.1g 07TD418 W84 C~1Cqe 2014 10 02.276076 02 52 03.26 +00 36 09.7 23.6i 07TD418 W84 C~1Cqe 2014 10 26.141985 02 50 18.75 +00 24 55.5 24.4g 07TD418 W84 C~1Cqe 2014 10 26.144190 02 50 18.75 +00 24 55.5 23.7r 07TD418 W84 C~1Cqe 2014 10 26.146551 02 50 18.74 +00 24 55.4 23.4i 07TD418 W84 C~1Cqe 2014 11 12.129821 02 48 55.08 +00 18 41.7 24.2g 07TD418 W84 C~1Cqe 2014 11 12.132037 02 48 55.07 +00 18 41.7 23.6r 07TD418 W84 C~1Cqe 2014 11 12.134398 02 48 55.06 +00 18 41.5 23.4i 07TD418 W84 C~1Cqe 2014 11 12.138183 02 48 55.04 +00 18 41.5 23.1z 07TD418 W84 C~1Cqe 2014 11 19.193281 02 48 20.55 +00 16 44.7 24.3g 07TD418 W84 C~1Cqe 2014 11 19.195498 02 48 20.52 +00 16 44.6 23.9r 07TD418 W84 C~1Cqe 2014 11 19.197847 02 48 20.53 +00 16 44.5 24.0i 07TD418 W84 C~1Cqe 2014 11 26.196597 02 47 47.42 +00 15 15.5 24.1r 07TD418 W84 C~1Cqe 2014 11 26.198947 02 47 47.40 +00 15 15.3 23.8i 07TD418 W84 C~1Cqe 2014 11 26.202755 02 47 47.38 +00 15 15.2 23.6z 07TD418 W84 C~1Cqe 2020 11 14.273800 03 25 32.077 +03 43 04.93 23.8G 07TD418 G37 C~4NOI 2020 11 14.359780 03 25 31.666 +03 43 03.43 07TD418 G37 C~4NOI 2020 11 14.393250 03 25 31.475 +03 43 02.91 07TD418 G37 C~4NOI
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 0.03 0.00 -0.15
2 0.0057 0.00 0.02 0.00 -0.14
3 0.0712 0.00 0.47 0.00 -0.09
4 0.0822 0.00 0.08 0.00 -0.05
5 0.0822 0.00 0.06 0.00 0.06
6 0.0927 0.00 -0.11 0.00 0.10
7 0.0981 0.00 -0.03 0.00 -0.19
8 0.0982 0.00 0.01 0.00 -0.11
9 0.1035 0.00 -0.18 0.00 0.13
10 0.1036 0.00 -0.09 0.00 0.09
11 0.1091 0.00 -0.06 0.00 -0.06
12 6.9707 0.00 -0.19 0.00 0.16
13 6.9707 0.00 0.16 0.00 -0.02
14 6.9843 0.00 -0.28 0.00 -0.19
15 6.9843 0.00 -0.01 0.00 0.25
16 7.0497 0.00 -0.01 0.00 -0.01
17 7.0497 0.00 0.15 0.00 0.05
18 7.0497 0.00 0.18 0.00 0.01
19 7.0962 0.00 -0.14 0.00 0.27
20 7.0962 0.00 -0.13 0.00 0.31
21 7.0962 0.00 -0.10 0.00 0.15
22 7.0962 0.00 -0.11 0.00 0.22
23 7.1155 0.00 0.11 0.00 0.03
24 7.1155 0.00 -0.18 0.00 -0.03
25 7.1155 0.00 0.15 0.00 -0.10
26 7.1347 0.00 0.12 0.00 0.07
27 7.1347 0.00 -0.01 0.00 -0.11
28 7.1347 0.00 -0.04 0.00 -0.17
29 13.1034 0.00 -0.14 0.00 -0.17
30 13.1036 0.00 0.31 0.00 -0.18
31 13.1037 0.00 0.02 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.
07TD418 quality flag:2 Type: SCATNEAR SCATEXTD SCATNEAR axisobj 48.793 48.793 48.793 ecceobj 0.198 0.198 0.198 incobj 15.091 15.091 15.091 qmin 38.307 38.316 38.356 qmax 58.711 58.653 58.798 amean 48.296 48.295 48.295 amin 47.822 47.837 47.813 amax 48.800 48.803 48.800 emean 0.188 0.188 0.188 emin 0.173 0.174 0.174 emax 0.204 0.204 0.205 imean 13.786 13.787 13.784 imin 13.303 13.305 13.305 imax 14.326 14.329 14.318 excite_mean 0.304 0.304 0.304 fracstop 1.000 1.000 1.000 cjmean 3.040 3.040 3.040 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 178.8 178.9 178.8 kozaiamp 180.0 179.9 180.0