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: 12UL177 # Created Sun Dec 22 02:09:22 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 37 observations of 37 # Arc: 12.94y # First observation: 2008/10/25 # Last observation: 2021/10/03 # Chi-squared of fit: 18.42 DOF: 68 RMS: 0.12 # Min/Max residuals: -0.30 0.51 # Exact a, adot, b, bdot, g, gdot: 1.760127E-05 3.016215E-02 -8.005117E-07 -3.815246E-03 2.799583E-02 -2.053674E-03 # Covariance matrix: 5.7448E-13 -1.9075E-13 -5.7275E-14 2.1267E-14 -5.5745E-14 -3.4750E-13 -1.9075E-13 7.0231E-14 2.2595E-14 -8.2266E-15 2.4739E-14 1.3404E-13 -5.7275E-14 2.2595E-14 1.3880E-13 -2.2285E-14 2.4285E-14 4.6967E-14 2.1267E-14 -8.2266E-15 -2.2285E-14 5.2422E-15 -4.1742E-15 -1.6777E-14 -5.5745E-14 2.4739E-14 2.4285E-14 -4.1742E-15 1.0515E-13 5.6864E-14 -3.4750E-13 1.3404E-13 4.6967E-14 -1.6777E-14 5.6864E-14 2.7258E-13 # lat0 lon0 xBary yBary zBary JD0 18.327692 24.656678 -0.135398 0.310119 -0.936072 2454764.868709 # Heliocentric elements and errors Epoch: 2454764.5000 = 2008/10/25 Mean Anomaly: 332.23506 +/- 0.010 Argument of Peri: 146.55029 +/- 0.013 Long of Asc Node: 272.05324 +/- 0.000 Inclination: 19.25048 +/- 0.000 Eccentricity: 0.11663328 +/- 0.0000 Semi-Major Axis: 40.71783619 +/- 0.0021 Time of Perihelion: 2462083.8032 +/- 7.3 Perihelion: 35.96878154 +/- 0.0023 Aphelion: 45.46689083 +/- 0.0027 Period (y) 259.8276 +/- 0.02 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 31.65729989 +/- 0.0004 Ecliptic Y 14.67592327 +/- 0.0002 Ecliptic Z 11.23204858 +/- 0.0001 Ecliptic XDOT -0.00129124 +/- 0.0000 Ecliptic YDOT 0.00265255 +/- 0.0000 Ecliptic ZDOT -0.00041746 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.65690936 +/- 0.0003 Geocenter to KBO 35.71968441 +/- 0.0004 # Hcoef: 7.39
The following table shows the complete astrometric record for 12UL177. 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 (12UL177) followed by the observatory code and reference code for the source of the astrometry.
2008 10 25.367955 01 01 45.25 +26 29 21.4 23.2V 12UL177 645 C~2VVR 2008 10 25.368784 01 01 45.25 +26 29 21.4 22.8V 12UL177 645 C~2VVR 2011 09 01.42764 01 29 15.697 +28 09 46.26 23.1r 12UL177 568 C~1C6U 2011 09 01.47295 01 29 15.533 +28 09 46.35 23.0r 12UL177 568 C~1C6U 2011 09 01.51559 01 29 15.372 +28 09 46.42 22.9r 12UL177 568 C~1C6U 2011 09 05.45551 01 29 00.414 +28 09 48.16 23.0r 12UL177 568 C~1C6U 2011 11 24.31930 01 22 07.762 +27 32 49.37 22.9r 12UL177 568 C~1C6U 2011 11 24.33787 01 22 07.683 +27 32 48.51 23.0r 12UL177 568 C~1C6U 2011 11 26.43627 01 21 59.174 +27 31 16.31 22.9r 12UL177 568 C~1C6U 2011 11 29.32442 01 21 48.110 +27 29 09.51 12UL177 568 C~1C6U 2011 12 01.34208 01 21 40.817 +27 27 41.15 23.0r 12UL177 568 C~1C6U 2012 01 28.29635 01 21 20.336 +26 55 23.43 22.8r 12UL177 568 C~1C6U 2012 08 18.49620 01 37 38.101 +28 31 39.35 23.1r 12UL177 568 C~1C6U 2012 08 23.58688 01 37 25.665 +28 32 38.30 23.0r 12UL177 568 C~1C6U 2012 08 28.46326 01 37 11.368 +28 33 16.00 23.0r 12UL177 568 C~1C6U 2012 09 12.39393 01 36 14.368 +28 33 16.54 23.0r 12UL177 568 C~1C6U 2012 09 14.43012 01 36 05.202 +28 33 03.06 23.1r 12UL177 568 C~1C6U 2012 10 19.36875 01 32 56.828 +28 21 11.21 23.0r 12UL177 568 C~1C6U 2012 10 19.41153 01 32 56.573 +28 21 09.79 22.9r 12UL177 568 C~1C6U 2012 10 20.36078 01 32 51.080 +28 20 39.17 22.9r 12UL177 568 C~1C6U 2012 10 20.39925 01 32 50.858 +28 20 37.96 22.9r 12UL177 568 C~1C6U 2012 10 20.43815 01 32 50.627 +28 20 36.72 22.9r 12UL177 568 C~1C6U 2012 10 21.42228 01 32 44.930 +28 20 04.38 12UL177 568 C~1C6U 2012 11 14.35891 01 30 33.877 +28 04 47.34 22.9r 12UL177 568 C~1C6U 2013 01 14.22823 01 28 21.946 +27 25 13.63 23.1r 12UL177 568 C~1C6U 2013 01 14.24065 01 28 21.956 +27 25 13.38 23.2r 12UL177 568 C~1C6U 2013 02 03.30644 01 29 10.545 +27 18 29.31 23.1r 12UL177 568 C~1C6U 2013 02 06.25798 01 29 21.524 +27 17 54.52 23.1r 12UL177 568 C~1C6U 2013 02 09.25615 01 29 33.623 +27 17 26.04 23.2r 12UL177 568 C~1C6U 2013 02 14.25470 01 29 55.869 +27 16 53.83 23.2r 12UL177 568 C~1C6U 2013 02 16.25637 01 30 05.458 +27 16 46.40 12UL177 568 C~1C6U 2013 02 17.25185 01 30 10.367 +27 16 43.99 22.9r 12UL177 568 C~1C6U 2017 09 23.39840 02 15 20.86 +30 07 29.0 22.8R 12UL177 G37 C~2LSK 2017 09 23.48222 02 15 20.48 +30 07 28.8 12UL177 G37 C~2LSK 2021 10 03.389680 02 47 34.022 +30 50 10.85 22.9G 12UL177 G37 C~55LY 2021 10 03.429660 02 47 33.823 +30 50 10.45 12UL177 G37 C~55LY 2021 10 03.462190 02 47 33.661 +30 50 10.24 12UL177 G37 C~55LY
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 -0.30
2 0.0000 0.00 0.07 0.00 -0.27
3 2.8503 0.00 0.05 0.00 0.04
4 2.8504 0.00 0.12 0.00 0.02
5 2.8505 0.00 0.09 0.00 -0.01
6 2.8613 0.00 -0.03 0.00 0.03
7 3.0799 0.00 0.05 0.00 -0.02
8 3.0800 0.00 0.05 0.00 -0.07
9 3.0857 0.00 -0.07 0.00 -0.04
10 3.0937 0.00 -0.07 0.00 -0.03
11 3.0992 0.00 0.01 0.00 0.01
12 3.2578 0.00 -0.03 0.00 0.07
13 3.8142 0.00 -0.22 0.00 0.12
14 3.8281 0.00 -0.18 0.00 0.17
15 3.8415 0.00 -0.15 0.00 0.03
16 3.8823 0.00 -0.08 0.00 0.07
17 3.8879 0.00 -0.22 0.00 0.13
18 3.9836 0.00 0.14 0.00 0.04
19 3.9837 0.00 0.11 0.00 -0.01
20 3.9863 0.00 0.10 0.00 0.00
21 3.9864 0.00 0.18 0.00 0.04
22 3.9865 0.00 0.16 0.00 0.06
23 3.9892 0.00 0.09 0.00 0.04
24 4.0547 0.00 0.09 0.00 -0.03
25 4.2214 0.00 0.11 0.00 -0.10
26 4.2214 0.00 0.04 0.00 -0.01
27 4.2764 0.00 0.03 0.00 -0.05
28 4.2844 0.00 -0.02 0.00 -0.07
29 4.2926 0.00 -0.10 0.00 -0.00
30 4.3063 0.00 0.00 0.00 -0.05
31 4.3118 0.00 -0.14 0.00 -0.03
32 4.3145 0.00 -0.25 0.00 0.10
33 8.9118 0.00 -0.23 0.00 0.08
34 8.9120 0.00 0.01 0.00 0.51
35 12.9391 0.00 0.04 0.00 -0.19
36 12.9393 0.00 0.03 0.00 -0.23
37 12.9393 0.00 0.02 0.00 -0.15
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.
12UL177 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.028 41.028 41.028 ecceobj 0.123 0.123 0.123 incobj 19.228 19.228 19.228 qmin 34.829 34.750 34.588 qmax 46.869 46.924 47.126 amean 40.706 40.699 40.692 amin 40.306 40.326 40.310 amax 41.103 41.108 41.098 emean 0.118 0.120 0.124 emin 0.096 0.101 0.100 emax 0.142 0.144 0.148 imean 20.961 20.924 20.835 imin 20.086 19.964 19.899 imax 21.725 21.623 21.656 excite_mean 0.377 0.377 0.377 fracstop 1.000 1.000 1.000 cjmean 2.896 2.896 2.896 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 182.4 180.3 179.7 kozaiamp 179.9 180.0 180.0