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: 49673 # Created Sat Apr 20 01:07:09 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 43 observations of 43 # Arc: 23.10y # First observation: 1999/07/20 # Last observation: 2022/08/27 # Chi-squared of fit: 133.26 DOF: 80 RMS: 0.31 # Min/Max residuals: -0.69 0.97 # Exact a, adot, b, bdot, g, gdot: 1.216330E-05 2.157955E-02 -8.782768E-06 -8.930752E-03 2.411245E-02 -2.227890E-03 # Covariance matrix: 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 # lat0 lon0 xBary yBary zBary JD0 -1.095899 -44.670697 0.320937 -0.018635 -0.961626 2451379.946603 # Heliocentric elements and errors Epoch: 2451380.5000 = 1999/07/21 Mean Anomaly: 287.28969 +/- 0.000 Argument of Peri: 267.61023 +/- 0.000 Long of Asc Node: 132.31793 +/- 0.000 Inclination: 22.50113 +/- 0.000 Eccentricity: 0.10697762 +/- 0.0000 Semi-Major Axis: 43.34650025 +/- 0.0000 Time of Perihelion: 2472433.9363 +/- 0.0 Perihelion: 38.70939489 +/- 0.0000 Aphelion: 47.98360561 +/- 0.0000 Period (y) 285.3903 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 29.95464670 +/- 0.0000 Ecliptic Y -30.05361104 +/- 0.0000 Ecliptic Z -0.79353802 +/- 0.0000 Ecliptic XDOT 0.00152550 +/- 0.0000 Ecliptic YDOT 0.00194247 +/- 0.0000 Ecliptic ZDOT -0.00100897 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.43978997 +/- 0.0000 Geocenter to KBO 41.47244946 +/- 0.0000 # Hcoef: 7.61
The following table shows the complete astrometric record for 49673. 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 (49673) followed by the observatory code and reference code for the source of the astrometry.
1999 07 20.44586 21 12 31.26 -17 17 10.6 24.1R 49673 568 Cb9109 1999 07 20.48388 21 12 31.08 -17 17 11.3 49673 568 Cb9109 1999 07 20.51177 21 12 30.96 -17 17 12.1 49673 568 Cb9109 1999 09 13.16523 21 08 27.59 -17 39 36.8 23.4R 49673 695 Ca8546 1999 09 13.18035 21 08 27.53 -17 39 37.2 23.6R 49673 695 Ca8546 1999 09 13.19539 21 08 27.50 -17 39 37.6 23.3R 49673 695 Ca8546 1999 09 14.16945 21 08 23.98 -17 39 57.5 49673 695 Ca8546 1999 09 14.18270 21 08 23.92 -17 39 57.4 49673 695 Ca8546 1999 09 14.19575 21 08 23.90 -17 39 57.7 49673 695 Ca8546 2000 08 01.19412 21 17 10.62 -17 29 45.5 22.8R 49673 807 Ch2983 2000 08 01.26710 21 17 10.28 -17 29 47.5 49673 807 Ch2983 2000 08 07.23483 21 16 42.21 -17 32 26.9 23.1R 49673 809 Cb9109 2000 08 07.29626 21 16 41.92 -17 32 28.4 23.1R 49673 809 Cb9109 2000 08 07.36306 21 16 41.63 -17 32 30.2 23.4R 49673 809 Cb9109 2000 08 08.17276 21 16 37.79 -17 32 51.8 23.6R 49673 809 Cb9109 2000 08 08.22057 21 16 37.55 -17 32 53.1 23.6R 49673 809 Cb9109 2000 08 08.26797 21 16 37.32 -17 32 54.3 23.4R 49673 809 Cb9109 2001 06 27.32590 21 25 10.83 -17 21 27.6 49673 304 Cd2245 2001 06 28.29190 21 25 07.75 -17 21 49.3 49673 304 Cd2245 2001 06 28.41092 21 25 07.36 -17 21 51.8 49673 304 Cd2245 2002 08 11.17743 21 27 43.88 -17 46 55.6 21.7R 49673 807 Cg2701 2002 08 12.09986 21 27 39.54 -17 47 20.9 49673 807 Cg2701 2002 08 12.19550 21 27 39.07 -17 47 23.7 49673 807 Cg2701 2011 07 27.491675 22 21 17.915 -18 06 04.61 23.6G 49673 F51 C~41iQ 2013 08 09.486489 22 32 19.609 -18 12 17.89 23.5G 49673 F51 C~41iQ 2013 08 31.454556 22 30 37.825 -18 24 23.98 23.7G 49673 F51 C~41iQ 2013 10 05.20116 22 28 07.56 -18 38 37.0 23.5R 49673 695 C~0zpx 2013 10 05.29007 22 28 07.20 -18 38 38.8 49673 695 C~0zpx 2013 10 06.24470 22 28 03.83 -18 38 54.5 49673 695 C~0zpx 2014 06 28.597179 22 40 34.387 -17 47 54.58 23.9G 49673 F51 C~41iQ 2014 07 06.556979 22 40 18.597 -17 51 41.22 24.3G 49673 F51 C~41iQ 2014 07 08.572087 22 40 13.767 -17 52 42.14 23.7G 49673 F51 C~41iQ 2014 07 29.539256 22 39 06.824 -18 04 11.24 23.3G 49673 F51 C~41iQ 2014 07 30.527617 22 39 03.007 -18 04 45.27 23.5G 49673 F51 C~41iQ 2015 06 20.559690 22 46 41.862 -17 41 47.67 24.0G 49673 F51 C~41iQ 2015 07 24.484244 22 45 27.589 -17 58 41.59 23.6G 49673 F51 C~41iQ 2016 08 27.414972 22 49 05.309 -18 15 57.40 23.9G 49673 F51 C~41iQ 2017 11 07.292591 22 50 43.087 -18 34 53.34 23.6G 49673 F51 C~41iQ 2018 08 06.523934 23 02 52.141 -17 54 54.34 23.5G 49673 F51 C~41iQ 2018 08 07.510378 23 02 48.254 -17 55 30.63 23.9G 49673 F51 C~41iQ 2022 08 27.249520 23 26 08.615 -17 41 56.78 23.6G 49673 G37 C~5nYI 2022 08 27.296280 23 26 08.399 -17 41 58.62 49673 G37 C~5nYI 2022 08 27.343260 23 26 08.188 -17 42 00.33 49673 G37 C~5nYI
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 0.22 0.00 0.70
2 0.0001 0.00 0.09 0.00 0.97
3 0.0002 0.00 0.18 0.00 0.88
4 0.1498 0.00 0.02 0.00 -0.07
5 0.1499 0.00 -0.04 0.00 -0.17
6 0.1499 0.00 0.36 0.00 -0.26
7 0.1526 0.00 0.62 0.00 -0.69
8 0.1526 0.00 0.45 0.00 -0.32
9 0.1526 0.00 0.87 0.00 -0.36
10 1.0342 0.00 -0.39 0.00 -0.23
11 1.0344 0.00 -0.29 0.00 -0.28
12 1.0508 0.00 -0.43 0.00 -0.12
13 1.0509 0.00 -0.36 0.00 0.01
14 1.0511 0.00 0.08 0.00 -0.02
15 1.0533 0.00 -0.37 0.00 -0.02
16 1.0535 0.00 -0.52 0.00 -0.05
17 1.0536 0.00 -0.56 0.00 0.01
18 1.9381 0.00 0.08 0.00 0.15
19 1.9407 0.00 -0.09 0.00 0.03
20 1.9410 0.00 -0.07 0.00 0.20
21 3.0602 0.00 -0.23 0.00 -0.36
22 3.0627 0.00 0.04 0.00 -0.19
23 3.0630 0.00 -0.11 0.00 -0.34
24 12.0193 0.00 0.17 0.00 -0.21
25 14.0562 0.00 0.02 0.00 0.18
26 14.1164 0.00 0.09 0.00 -0.05
27 14.2115 0.00 0.18 0.00 0.64
28 14.2118 0.00 -0.34 0.00 0.31
29 14.2144 0.00 -0.16 0.00 0.20
30 14.9409 0.00 0.55 0.00 0.11
31 14.9627 0.00 0.47 0.00 0.22
32 14.9682 0.00 0.10 0.00 0.01
33 15.0256 0.00 0.01 0.00 -0.12
34 15.0283 0.00 0.09 0.00 0.05
35 15.9182 0.00 0.06 0.00 0.11
36 16.0111 0.00 0.01 0.00 -0.08
37 17.1060 0.00 -0.40 0.00 -0.09
38 18.3021 0.00 -0.20 0.00 -0.20
39 19.0474 0.00 0.03 0.00 -0.18
40 19.0501 0.00 -0.04 0.00 0.00
41 23.1042 0.00 -0.04 0.00 -0.09
42 23.1043 0.00 -0.08 0.00 -0.17
43 23.1044 0.00 -0.02 0.00 -0.11
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.
49673 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 43.282 43.282 43.282 ecceobj 0.107 0.107 0.107 incobj 22.518 22.518 22.518 qmin 38.129 38.102 38.133 qmax 48.532 48.530 48.536 amean 43.201 43.201 43.201 amin 42.852 42.861 42.863 amax 43.575 43.569 43.567 emean 0.100 0.100 0.100 emin 0.088 0.088 0.088 emax 0.114 0.114 0.115 imean 21.248 21.248 21.248 imin 20.810 20.810 20.811 imax 21.639 21.639 21.640 excite_mean 0.376 0.376 0.376 fracstop 1.000 1.000 1.000 cjmean 2.918 2.918 2.918 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 178.1 178.1 178.1 kozaiamp 180.0 180.0 180.0