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: 12UG177 # Created Sun Dec 22 02:09:22 2024 # Orbit generated from Bernstein formalism # Fitting 20 observations of 20 # Arc: 4.20y # First observation: 2011/11/24 # Last observation: 2016/02/04 Preliminary a, adot, b, bdot, g, gdot: 0.000349 0.040440 -0.000088 -0.009395 0.033788 0.000000 # Chi-squared of fit: 10.98 DOF: 34 RMS: 0.13 # Min/Max residuals: -0.32 0.40 # Exact a, adot, b, bdot, g, gdot: 1.933775E-05 4.131380E-02 -4.769563E-06 -9.696543E-03 3.369203E-02 -1.275776E-03 # Covariance matrix: 3.4731E-13 -4.0639E-13 -5.5210E-14 9.7081E-14 -1.1309E-13 -1.9631E-12 -4.0639E-13 8.0074E-13 1.2767E-13 -2.4104E-13 4.1165E-14 4.5576E-12 -5.5210E-14 1.2767E-13 1.6479E-13 -1.0727E-13 -5.2881E-16 7.9833E-13 9.7081E-14 -2.4104E-13 -1.0727E-13 1.4403E-13 1.5367E-14 -1.5292E-12 -1.1309E-13 4.1165E-14 -5.2881E-16 1.5367E-14 1.9116E-13 -3.4537E-14 -1.9631E-12 4.5576E-12 7.9833E-13 -1.5292E-12 -3.4537E-14 2.8523E-11 # lat0 lon0 xBary yBary zBary JD0 17.841819 29.722828 -0.521207 0.256028 -0.795378 2455889.855906 # Heliocentric elements and errors Epoch: 2455880.5000 = 2011/11/15 Mean Anomaly: 357.78875 +/- 0.024 Argument of Peri: 130.32111 +/- 0.039 Long of Asc Node: 261.93315 +/- 0.001 Inclination: 21.85621 +/- 0.000 Eccentricity: 0.23073952 +/- 0.0001 Semi-Major Axis: 39.61436318 +/- 0.0035 Time of Perihelion: 2456439.8887 +/- 6.0 Perihelion: 30.47376417 +/- 0.0036 Aphelion: 48.75496220 +/- 0.0049 Period (y) 249.3373 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 25.00637069 +/- 0.0003 Ecliptic Y 14.87663144 +/- 0.0002 Ecliptic Z 9.09369230 +/- 0.0001 Ecliptic XDOT -0.00154448 +/- 0.0000 Ecliptic YDOT 0.00299121 +/- 0.0000 Ecliptic ZDOT -0.00078174 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 30.48488113 +/- 0.0003 Geocenter to KBO 29.68061318 +/- 0.0004 # Hcoef: 9.58
The following table shows the complete astrometric record for 12UG177. 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 (12UG177) followed by the observatory code and reference code for the source of the astrometry.
2011 11 24.35514 01 22 30.054 +27 57 33.00 24.3r 12UG177 568 C~1C6T 2011 11 26.43627 01 22 20.414 +27 55 40.01 24.4r 12UG177 568 C~1C6T 2011 11 29.32442 01 22 07.817 +27 53 03.54 24.2r 12UG177 568 C~1C6T 2011 12 01.34208 01 21 59.528 +27 51 14.45 24.5r 12UG177 568 C~1C6T 2012 08 18.50472 01 42 20.034 +29 01 30.28 24.3r 12UG177 568 C~1C6T 2012 08 18.54379 01 42 19.929 +29 01 31.04 24.1r 12UG177 568 C~1C6T 2012 08 23.59545 01 42 07.121 +29 02 41.30 24.4r 12UG177 568 C~1C6T 2012 09 12.40265 01 40 48.780 +29 03 29.98 24.4r 12UG177 568 C~1C6T 2012 09 14.43873 01 40 38.479 +29 03 13.96 24.6r 12UG177 568 C~1C6T 2012 10 19.50141 01 37 00.926 +28 48 53.54 24.7r 12UG177 568 C~1C6T 2012 10 20.36936 01 36 55.104 +28 48 19.71 24.4r 12UG177 568 C~1C6T 2012 10 20.40829 01 36 54.843 +28 48 18.12 24.4r 12UG177 568 C~1C6T 2012 10 20.44675 01 36 54.572 +28 48 16.52 24.2r 12UG177 568 C~1C6T 2012 10 21.45652 01 36 47.785 +28 47 36.41 24.4r 12UG177 568 C~1C6T 2012 11 14.36744 01 34 15.083 +28 29 02.68 24.7r 12UG177 568 C~1C6T 2013 01 14.26447 01 31 45.383 +27 40 15.97 24.5r 12UG177 568 C~1C6T 2013 02 04.22689 01 32 50.144 +27 31 22.10 12UG177 568 C~1C6T 2013 02 17.22194 01 33 59.206 +27 29 04.39 24.7r 12UG177 568 C~1C6T 2016 02 04.10106 02 04 34.33 +28 21 21.5 23.9R 12UG177 G37 C~1lwU 2016 02 04.19214 02 04 34.65 +28 21 18.8 12UG177 G37 C~1lwU
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 0.01 0.00 0.05
2 0.0057 -161.77 -0.09 -54.01 -0.03
3 0.0136 -376.68 0.07 -132.59 0.02
4 0.0191 -520.56 0.07 -189.88 0.11
5 0.7342 16020.32 -0.02 -2280.81 -0.06
6 0.7343 16019.29 -0.15 -2279.60 0.12
7 0.7481 15886.07 -0.02 -2154.14 0.15
8 0.8023 14937.29 0.10 -1743.01 0.17
9 0.8079 14804.67 0.23 -1709.79 0.04
10 0.9039 11817.78 -0.18 -1484.34 -0.06
11 0.9063 11733.93 -0.04 -1488.05 -0.02
12 0.9064 11730.14 0.01 -1488.28 -0.11
13 0.9065 11726.23 -0.10 -1488.48 -0.16
14 0.9092 11628.22 0.07 -1493.40 -0.18
15 0.9747 9343.81 0.07 -1793.66 0.08
16 1.1414 6413.71 0.07 -3776.99 0.14
17 1.1988 7014.65 0.01 -4594.21 -0.14
18 1.2344 7818.49 -0.14 -5063.54 -0.18
19 4.1964 32032.06 -0.06 -10464.67 0.40
20 4.1967 32035.34 0.08 -10468.61 -0.32
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.
12UG177 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.684 39.697 39.672 ecceobj 0.232 0.232 0.232 incobj 21.863 21.864 21.863 qmin 27.315 27.224 27.451 qmax 52.250 52.294 52.141 amean 39.454 39.454 39.454 amin 39.006 39.024 39.002 amax 40.034 39.984 40.016 emean 0.249 0.251 0.248 emin 0.186 0.185 0.188 emax 0.307 0.309 0.305 imean 22.410 22.364 22.470 imin 20.391 20.343 20.443 imax 24.329 24.331 24.320 excite_mean 0.457 0.457 0.457 fracstop 1.000 1.000 1.000 cjmean 2.810 2.810 2.811 libcent 0 180.5 179.8 180.4 libamp 0 90.8 86.7 94.4 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 86.2 85.7 87.1 kozaiamp 45.3 43.4 48.3