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: 12UK177 # Created Thu Apr 25 01:14:05 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 27 observations of 27 # Arc: 8.15y # First observation: 2011/09/01 # Last observation: 2019/10/26 # Chi-squared of fit: 8.44 DOF: 48 RMS: 0.10 # Min/Max residuals: -0.27 0.24 # Exact a, adot, b, bdot, g, gdot: 1.867423E-05 3.390428E-02 -5.709439E-06 -1.151776E-02 2.762383E-02 -5.560858E-03 # Covariance matrix: 2.2387E-13 -1.5572E-13 -3.4036E-14 4.8900E-14 4.7477E-14 -4.7978E-13 -1.5572E-13 2.7015E-13 6.5198E-14 -9.1917E-14 7.9955E-14 8.8798E-13 -3.4036E-14 6.5198E-14 9.5951E-14 -4.0956E-14 2.1229E-14 2.2421E-13 4.8900E-14 -9.1917E-14 -4.0956E-14 4.4729E-14 -2.8759E-14 -3.1616E-13 4.7477E-14 7.9955E-14 2.1229E-14 -2.8759E-14 1.3996E-13 2.6842E-13 -4.7978E-13 8.8798E-13 2.2421E-13 -3.1616E-13 2.6842E-13 3.0548E-12 # lat0 lon0 xBary yBary zBary JD0 17.188350 31.779081 0.807902 0.177196 -0.572969 2455805.923946 # Heliocentric elements and errors Epoch: 2455806.5000 = 2011/09/02 Mean Anomaly: 355.17894 +/- 0.002 Argument of Peri: 162.09884 +/- 0.007 Long of Asc Node: 251.53153 +/- 0.000 Inclination: 24.82729 +/- 0.000 Eccentricity: 0.62383262 +/- 0.0001 Semi-Major Axis: 94.00912265 +/- 0.0155 Time of Perihelion: 2460265.0453 +/- 81.1 Perihelion: 35.36316513 +/- 0.0079 Aphelion: 152.65508016 +/- 0.0257 Period (y) 911.5137 +/- 0.22 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 30.33791983 +/- 0.0004 Ecliptic Y 17.84382304 +/- 0.0002 Ecliptic Z 10.69761930 +/- 0.0001 Ecliptic XDOT -0.00193370 +/- 0.0000 Ecliptic YDOT 0.00276231 +/- 0.0000 Ecliptic ZDOT -0.00125337 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.78640987 +/- 0.0004 Geocenter to KBO 36.20076930 +/- 0.0005 # Hcoef: 8.71
The following table shows the complete astrometric record for 12UK177. 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 (12UK177) followed by the observatory code and reference code for the source of the astrometry.
2011 09 01.42318 01 31 50.459 +28 06 58.05 24.3r 12UK177 568 C~1C6U 2011 09 01.46869 01 31 50.273 +28 06 58.00 24.0r 12UK177 568 C~1C6U 2011 09 01.51133 01 31 50.148 +28 06 58.23 24.5r 12UK177 568 C~1C6U 2011 09 05.45125 01 31 36.616 +28 06 50.57 24.3r 12UK177 568 C~1C6U 2011 11 24.35514 01 25 08.760 +27 27 13.47 24.4r 12UK177 568 C~1C6U 2011 11 30.31101 01 24 47.032 +27 22 41.02 24.5r 12UK177 568 C~1C6U 2011 12 01.35919 01 24 43.521 +27 21 53.14 24.3r 12UK177 568 C~1C6U 2012 01 28.23315 01 24 33.037 +26 47 34.92 24.6r 12UK177 568 C~1C6U 2012 08 18.50920 01 41 44.241 +28 12 48.53 24.3r 12UK177 568 C~1C6U 2012 08 18.54805 01 41 44.161 +28 12 48.88 24.4r 12UK177 568 C~1C6U 2012 08 28.50703 01 41 21.374 +28 13 57.14 24.7r 12UK177 568 C~1C6U 2012 09 12.40702 01 40 30.283 +28 13 18.36 24.1r 12UK177 568 C~1C6U 2012 09 14.44299 01 40 21.913 +28 12 59.73 24.1r 12UK177 568 C~1C6U 2012 10 19.38154 01 37 25.634 +27 59 52.70 24.1r 12UK177 568 C~1C6U 2012 10 19.42436 01 37 25.395 +27 59 51.26 24.0r 12UK177 568 C~1C6U 2012 10 20.37365 01 37 20.194 +27 59 18.75 24.2r 12UK177 568 C~1C6U 2012 10 20.41255 01 37 19.968 +27 59 17.40 12UK177 568 C~1C6U 2012 10 20.45104 01 37 19.759 +27 59 16.16 24.0r 12UK177 568 C~1C6U 2012 10 21.46079 01 37 14.224 +27 58 41.09 24.6r 12UK177 568 C~1C6U 2012 11 14.37175 01 35 09.717 +27 42 42.95 24.4r 12UK177 568 C~1C6U 2013 01 14.26447 01 33 07.625 +27 01 21.27 24.3r 12UK177 568 C~1C6U 2013 01 14.27309 01 33 07.637 +27 01 21.01 24.5r 12UK177 568 C~1C6U 2013 02 06.23610 01 34 09.581 +26 53 12.28 24.8r 12UK177 568 C~1C6U 2013 02 06.24917 01 34 09.634 +26 53 12.06 24.2r 12UK177 568 C~1C6U 2013 02 14.23326 01 34 44.798 +26 51 51.62 12UK177 568 C~1C6U 2019 10 26.421470 02 45 23.563 +27 42 51.33 24.1G 12UK177 G37 C~3cjl 2019 10 26.506510 02 45 23.077 +27 42 48.91 12UK177 G37 C~3cjl
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 0.24 0.00 -0.11
2 0.0001 0.00 -0.27 0.00 -0.16
3 0.0002 0.00 0.01 0.00 0.07
4 0.0110 0.00 0.03 0.00 -0.02
5 0.2298 0.00 -0.02 0.00 -0.04
6 0.2461 0.00 -0.05 0.00 -0.05
7 0.2490 0.00 -0.01 0.00 -0.10
8 0.4074 0.00 0.14 0.00 0.02
9 0.9640 0.00 0.17 0.00 0.03
10 0.9641 0.00 0.07 0.00 -0.04
11 0.9913 0.00 0.00 0.00 0.12
12 1.0321 0.00 -0.08 0.00 0.09
13 1.0377 0.00 0.06 0.00 0.03
14 1.1334 0.00 -0.15 0.00 0.08
15 1.1335 0.00 -0.14 0.00 0.09
16 1.1361 0.00 -0.11 0.00 0.00
17 1.1362 0.00 -0.23 0.00 -0.01
18 1.1363 0.00 -0.14 0.00 0.08
19 1.1390 0.00 -0.09 0.00 0.06
20 1.2045 0.00 0.01 0.00 0.06
21 1.3712 0.00 0.03 0.00 -0.01
22 1.3713 0.00 0.05 0.00 -0.02
23 1.4341 0.00 0.13 0.00 -0.06
24 1.4342 0.00 0.16 0.00 -0.11
25 1.4560 0.00 0.05 0.00 -0.05
26 8.1506 0.00 -0.00 0.00 -0.01
27 8.1508 0.00 0.01 0.00 -0.03
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.
12UK177 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 94.452 94.451 94.453 ecceobj 0.625 0.625 0.625 incobj 24.825 24.825 24.825 qmin 33.348 33.217 33.060 qmax 156.637 157.417 155.733 amean 92.832 92.980 92.481 amin 90.938 90.987 90.143 amax 95.604 95.732 95.325 emean 0.623 0.624 0.622 emin 0.606 0.606 0.604 emax 0.641 0.645 0.640 imean 25.577 25.616 25.533 imin 24.462 24.291 24.064 imax 26.835 26.885 26.837 excite_mean 0.758 0.759 0.757 fracstop 1.000 1.000 1.000 cjmean 2.801 2.800 2.800 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 241.3 232.0 224.7 kozaiamp 180.0 180.0 180.0