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: 12BV154 # Created Fri Nov 22 02:09:16 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 22 observations of 22 # Arc: 10.05y # First observation: 2011/01/30 # Last observation: 2021/02/16 # Chi-squared of fit: 16.56 DOF: 38 RMS: 0.15 # Min/Max residuals: -0.23 0.58 # Exact a, adot, b, bdot, g, gdot: 1.775034E-05 2.973907E-02 3.151814E-06 6.256115E-03 2.714462E-02 1.021294E-03 # Covariance matrix: 2.7118E-13 -1.2361E-13 2.4829E-14 -2.2377E-14 7.3251E-14 -3.3757E-13 -1.2361E-13 1.3583E-13 -3.0375E-14 2.7747E-14 1.4375E-13 4.1890E-13 2.4829E-14 -3.0375E-14 1.3523E-13 -2.5401E-14 -3.2604E-14 -9.8045E-14 -2.2377E-14 2.7747E-14 -2.5401E-14 1.1983E-14 3.0762E-14 8.9564E-14 7.3251E-14 1.4375E-13 -3.2604E-14 3.0762E-14 7.7043E-13 4.6528E-13 -3.3757E-13 4.1890E-13 -9.8045E-14 8.9564E-14 4.6528E-13 1.3522E-12 # lat0 lon0 xBary yBary zBary JD0 -3.215669 162.785281 0.532553 -0.046693 -0.831113 2455591.928956 # Heliocentric elements and errors Epoch: 2455592.5000 = 2011/01/31 Mean Anomaly: 4.90331 +/- 0.009 Argument of Peri: 337.62360 +/- 0.014 Long of Asc Node: 176.62191 +/- 0.000 Inclination: 12.25691 +/- 0.000 Eccentricity: 0.19440893 +/- 0.0001 Semi-Major Axis: 46.69790129 +/- 0.0075 Time of Perihelion: 2454004.9356 +/- 3.0 Perihelion: 37.61941233 +/- 0.0077 Aphelion: 55.77639026 +/- 0.0102 Period (y) 319.1202 +/- 0.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -35.76754601 +/- 0.0011 Ecliptic Y 11.63957452 +/- 0.0004 Ecliptic Z -2.06640815 +/- 0.0001 Ecliptic XDOT -0.00102085 +/- 0.0000 Ecliptic YDOT -0.00281816 +/- 0.0000 Ecliptic ZDOT 0.00062424 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.67049321 +/- 0.0011 Geocenter to KBO 36.83971256 +/- 0.0012 # Hcoef: 6.88
The following table shows the complete astrometric record for 12BV154. 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 (12BV154) followed by the observatory code and reference code for the source of the astrometry.
2011 01 30.42819 10 51 35.715 +03 47 18.35 23.1w 12BV154 F51 C~1w3p 2011 01 30.44425 10 51 35.669 +03 47 18.89 23.4w 12BV154 F51 C~1w3p 2011 01 30.45901 10 51 35.583 +03 47 18.94 23.4w 12BV154 F51 C~1w3p 2012 01 19.47799 10 59 05.876 +03 24 04.21 23.3w 12BV154 F51 C~1w3p 2012 01 19.49198 10 59 05.828 +03 24 04.17 23.0w 12BV154 F51 C~1w3p 2012 01 19.50606 10 59 05.794 +03 24 04.45 22.9w 12BV154 F51 C~1w3p 2012 01 19.52011 10 59 05.746 +03 24 04.74 23.2w 12BV154 F51 C~1w3p 2012 03 19.34091 10 54 40.913 +03 53 58.00 23.1w 12BV154 F51 C~1w3p 2012 03 19.35485 10 54 40.852 +03 53 58.64 22.7w 12BV154 F51 C~1w3p 2012 03 19.36881 10 54 40.796 +03 53 59.02 22.8w 12BV154 F51 C~1w3p 2012 03 19.38278 10 54 40.709 +03 53 59.60 22.7w 12BV154 F51 C~1w3p 2013 03 05.46301 11 02 41.046 +03 26 36.31 22.4w 12BV154 F51 C~1w3p 2014 02 28.40208 11 09 58.526 +03 04 05.03 22.7w 12BV154 F51 C~1w3p 2014 02 28.41444 11 09 58.478 +03 04 05.63 22.7w 12BV154 F51 C~1w3p 2014 02 28.42697 11 09 58.406 +03 04 05.95 22.4w 12BV154 F51 C~1w3p 2014 02 28.43936 11 09 58.358 +03 04 06.37 22.3w 12BV154 F51 C~1w3p 2014 03 05.51726 11 09 33.778 +03 06 59.14 22.4w 12BV154 F51 C~1w3p 2019 02 08.440160 11 45 22.204 +01 14 40.79 22.6G 12BV154 G37 C~2zmc 2019 02 08.505110 11 45 22.016 +01 14 42.65 12BV154 G37 C~2zmc 2021 02 16.572734 11 58 10.373 +00 39 13.91 22.8w 12BV154 F51 C~4Z5E 2021 02 16.585044 11 58 10.315 +00 39 14.09 22.6w 12BV154 F51 C~4Z5E 2021 02 16.609667 11 58 10.224 +00 39 14.73 22.7w 12BV154 F51 C~4Z5E
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 -0.04 0.00 0.13
2 0.0000 0.00 0.25 0.00 0.26
3 0.0001 0.00 -0.13 0.00 -0.06
4 0.9693 0.00 -0.04 0.00 0.19
5 0.9694 0.00 -0.08 0.00 -0.12
6 0.9694 0.00 0.08 0.00 -0.12
7 0.9695 0.00 0.04 0.00 -0.10
8 1.1332 0.00 0.00 0.00 -0.04
9 1.1333 0.00 0.08 0.00 0.13
10 1.1333 0.00 0.23 0.00 0.03
11 1.1333 0.00 -0.09 0.00 0.14
12 2.0946 0.00 0.07 0.00 -0.05
13 3.0800 0.00 -0.23 0.00 -0.19
14 3.0800 0.00 -0.04 0.00 -0.01
15 3.0801 0.00 -0.20 0.00 -0.11
16 3.0801 0.00 -0.01 0.00 -0.11
17 3.0940 0.00 -0.09 0.00 -0.18
18 8.0247 0.00 -0.17 0.00 0.00
19 8.0249 0.00 0.58 0.00 0.12
20 10.0483 0.00 -0.00 0.00 0.18
21 10.0483 0.00 -0.14 0.00 -0.01
22 10.0484 0.00 -0.04 0.00 -0.09
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.
12BV154 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 46.810 46.810 46.810 ecceobj 0.196 0.196 0.196 incobj 12.258 12.258 12.258 qmin 36.825 36.812 36.847 qmax 57.446 57.461 57.552 amean 46.924 46.924 46.924 amin 46.518 46.504 46.504 amax 47.421 47.435 47.430 emean 0.198 0.198 0.198 emin 0.185 0.185 0.185 emax 0.213 0.213 0.214 imean 11.941 11.940 11.940 imin 11.339 11.332 11.337 imax 12.538 12.537 12.534 excite_mean 0.287 0.287 0.287 fracstop 1.000 1.000 1.000 cjmean 3.035 3.035 3.035 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 172.3 172.3 172.3 kozaiamp 180.0 180.0 180.0