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: 12UN177 # Created Sun Dec 22 02:09:22 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 40 observations of 40 # Arc: 12.71y # First observation: 2009/01/18 # Last observation: 2021/10/03 # Chi-squared of fit: 24.76 DOF: 74 RMS: 0.14 # Min/Max residuals: -0.31 0.41 # Exact a, adot, b, bdot, g, gdot: 1.782115E-05 2.915472E-02 4.665079E-06 7.501932E-03 2.717687E-02 -2.468566E-03 # Covariance matrix: 3.1284E-13 -8.6204E-14 4.8970E-14 -1.8166E-14 -7.7536E-14 -1.6274E-13 -8.6204E-14 3.5646E-14 -1.8397E-14 8.2749E-15 6.8950E-15 7.0213E-14 4.8970E-14 -1.8397E-14 1.0204E-13 -1.8254E-14 -1.1970E-14 -4.0588E-14 -1.8166E-14 8.2749E-15 -1.8254E-14 5.3955E-15 1.3513E-15 1.7914E-14 -7.7536E-14 6.8950E-15 -1.1970E-14 1.3513E-15 6.6313E-14 2.0451E-14 -1.6274E-13 7.0213E-14 -4.0588E-14 1.7914E-14 2.0451E-14 1.5277E-13 # lat0 lon0 xBary yBary zBary JD0 14.540039 24.916545 -0.987354 -0.013577 0.052474 2454849.670784 # Heliocentric elements and errors Epoch: 2454850.5000 = 2009/01/19 Mean Anomaly: 343.50338 +/- 0.005 Argument of Peri: 69.94056 +/- 0.007 Long of Asc Node: 341.21827 +/- 0.000 Inclination: 20.07370 +/- 0.000 Eccentricity: 0.15901777 +/- 0.0000 Semi-Major Axis: 43.23578552 +/- 0.0021 Time of Perihelion: 2459608.8439 +/- 7.3 Perihelion: 36.36052724 +/- 0.0022 Aphelion: 50.11104381 +/- 0.0028 Period (y) 284.2976 +/- 0.02 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 31.83909373 +/- 0.0003 Ecliptic Y 15.87430939 +/- 0.0002 Ecliptic Z 9.23803584 +/- 0.0001 Ecliptic XDOT -0.00162232 +/- 0.0000 Ecliptic YDOT 0.00248544 +/- 0.0000 Ecliptic ZDOT 0.00066901 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.75684212 +/- 0.0003 Geocenter to KBO 36.79609157 +/- 0.0003 # Hcoef: 7.47
The following table shows the complete astrometric record for 12UN177. 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 (12UN177) followed by the observatory code and reference code for the source of the astrometry.
2009 01 18.170018 01 09 24.29 +23 06 48.9 12UN177 645 C~1RIb 2009 01 18.170848 01 09 24.29 +23 06 48.9 12UN177 645 C~1RIb 2009 01 18.173335 01 09 24.30 +23 06 48.9 12UN177 645 C~1RIb 2009 09 26.399283 01 21 46.16 +25 02 14.9 22.8V 12UN177 645 C~1RIb 2009 09 26.400113 01 21 46.15 +25 02 14.9 22.2V 12UN177 645 C~1RIb 2009 09 26.402600 01 21 46.14 +25 02 14.9 23.9V 12UN177 645 C~1RIb 2011 08 31.49780 01 36 41.788 +27 07 24.71 23.0r 12UN177 568 C~1C6U 2011 08 31.54070 01 36 41.628 +27 07 25.07 23.2r 12UN177 568 C~1C6U 2011 08 31.60502 01 36 41.389 +27 07 25.52 23.2r 12UN177 568 C~1C6U 2011 09 05.51099 01 36 23.114 +27 07 56.96 22.9r 12UN177 568 C~1C6U 2011 11 24.36793 01 29 21.046 +26 40 21.77 23.1r 12UN177 568 C~1C6U 2011 11 30.37304 01 28 55.963 +26 36 45.59 23.1r 12UN177 568 C~1C6U 2011 12 01.37198 01 28 52.085 +26 36 09.75 23.1r 12UN177 568 C~1C6U 2012 01 28.24324 01 28 09.511 +26 11 06.41 23.0r 12UN177 568 C~1C6U 2012 02 24.25014 01 29 57.941 +26 11 08.85 23.0r 12UN177 568 C~1C6U 2012 08 18.50920 01 43 54.022 +28 04 21.86 23.0r 12UN177 568 C~1C6U 2012 08 18.54805 01 43 53.935 +28 04 22.68 12UN177 568 C~1C6U 2012 08 23.60417 01 43 41.650 +28 05 50.68 23.2r 12UN177 568 C~1C6U 2012 08 24.41397 01 43 39.460 +28 06 02.88 23.1r 12UN177 568 C~1C6U 2012 08 24.46174 01 43 39.316 +28 06 03.76 23.2r 12UN177 568 C~1C6U 2012 08 28.50703 01 43 27.309 +28 06 58.19 23.3r 12UN177 568 C~1C6U 2012 09 12.40702 01 42 30.229 +28 08 33.04 23.1r 12UN177 568 C~1C6U 2012 09 14.44299 01 42 21.015 +28 08 32.89 23.1r 12UN177 568 C~1C6U 2012 10 19.38154 01 39 09.624 +28 00 46.03 22.9r 12UN177 568 C~1C6U 2012 10 19.42436 01 39 09.365 +28 00 44.93 23.1r 12UN177 568 C~1C6U 2012 10 20.37365 01 39 03.729 +28 00 21.26 22.9r 12UN177 568 C~1C6U 2012 10 20.41255 01 39 03.493 +28 00 20.31 12UN177 568 C~1C6U 2012 10 20.45104 01 39 03.260 +28 00 19.33 23.1r 12UN177 568 C~1C6U 2012 10 21.46079 01 38 57.268 +27 59 53.66 22.9r 12UN177 568 C~1C6U 2012 11 14.37175 01 36 41.565 +27 47 34.81 23.1r 12UN177 568 C~1C6U 2013 02 04.22240 01 34 54.407 +27 10 17.30 23.4r 12UN177 568 C~1C6U 2013 02 06.23610 01 35 01.275 +27 10 05.72 23.2r 12UN177 568 C~1C6U 2013 02 14.26333 01 35 32.960 +27 09 49.90 23.3r 12UN177 568 C~1C6U 2013 02 16.26499 01 35 41.897 +27 09 53.41 23.5r 12UN177 568 C~1C6U 2013 02 17.22194 01 35 46.308 +27 09 56.45 23.2r 12UN177 568 C~1C6U 2017 12 20.10863 02 09 01.970 +32 17 28.22 23.0R 12UN177 G37 C~2Uwm 2017 12 20.18014 02 09 01.738 +32 17 25.62 12UN177 G37 C~2Uwm 2021 10 03.387350 02 47 16.167 +36 12 29.47 22.9G 12UN177 G37 C~55LY 2021 10 03.427880 02 47 15.926 +36 12 29.40 12UN177 G37 C~55LY 2021 10 03.460400 02 47 15.751 +36 12 29.60 12UN177 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 -0.15 0.00 -0.13
2 0.0000 0.00 -0.17 0.00 -0.12
3 0.0000 0.00 -0.10 0.00 -0.09
4 0.6878 0.00 0.41 0.00 -0.08
5 0.6878 0.00 0.33 0.00 -0.07
6 0.6878 0.00 0.38 0.00 -0.04
7 2.6155 0.00 0.00 0.00 -0.09
8 2.6157 0.00 -0.07 0.00 -0.09
9 2.6158 0.00 -0.17 0.00 -0.16
10 2.6293 0.00 -0.08 0.00 0.01
11 2.8479 0.00 0.13 0.00 0.06
12 2.8643 0.00 0.10 0.00 0.05
13 2.8671 0.00 0.08 0.00 0.04
14 3.0255 0.00 0.16 0.00 -0.05
15 3.0995 0.00 0.08 0.00 0.14
16 3.5820 0.00 -0.05 0.00 0.19
17 3.5821 0.00 -0.04 0.00 0.25
18 3.5960 0.00 0.03 0.00 0.08
19 3.5982 0.00 0.04 0.00 -0.06
20 3.5983 0.00 -0.08 0.00 0.08
21 3.6094 0.00 0.13 0.00 -0.01
22 3.6502 0.00 -0.31 0.00 0.13
23 3.6558 0.00 -0.31 0.00 0.13
24 3.7514 0.00 -0.13 0.00 -0.01
25 3.7516 0.00 -0.12 0.00 -0.06
26 3.7542 0.00 -0.13 0.00 -0.05
27 3.7543 0.00 -0.14 0.00 -0.02
28 3.7544 0.00 -0.15 0.00 -0.03
29 3.7571 0.00 -0.04 0.00 0.05
30 3.8226 0.00 0.01 0.00 0.11
31 4.0467 0.00 0.26 0.00 0.13
32 4.0522 0.00 0.07 0.00 0.02
33 4.0742 0.00 -0.24 0.00 -0.06
34 4.0797 0.00 -0.10 0.00 -0.17
35 4.0823 0.00 -0.05 0.00 0.05
36 8.9197 0.00 0.01 0.00 -0.02
37 8.9199 0.00 0.09 0.00 0.01
38 12.7070 0.00 0.29 0.00 0.02
39 12.7071 0.00 -0.07 0.00 -0.17
40 12.7072 0.00 -0.08 0.00 -0.07
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.
12UN177 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 43.594 43.594 43.594 ecceobj 0.166 0.166 0.166 incobj 20.064 20.064 20.064 qmin 35.734 35.719 35.740 qmax 51.064 51.068 51.060 amean 43.215 43.215 43.215 amin 42.856 42.855 42.856 amax 43.614 43.613 43.620 emean 0.154 0.154 0.154 emin 0.137 0.137 0.138 emax 0.171 0.171 0.171 imean 20.935 20.935 20.935 imin 20.426 20.426 20.426 imax 21.493 21.495 21.495 excite_mean 0.389 0.389 0.389 fracstop 1.000 1.000 1.000 cjmean 2.908 2.908 2.908 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 176.7 176.8 176.6 kozaiamp 180.0 180.0 179.9