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: 16RX81 # Created Mon Apr 28 01:10:52 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 11 observations of 11 # Arc: 5.04y # First observation: 2013/10/04 # Last observation: 2018/10/18 # Chi-squared of fit: 3.59 DOF: 16 RMS: 0.10 # Min/Max residuals: -0.24 0.18 # Exact a, adot, b, bdot, g, gdot: 1.565062E-05 2.312779E-02 1.767941E-07 6.850216E-05 2.382456E-02 -6.224523E-05 # Covariance matrix: 6.5662E-13 -4.1167E-13 5.7511E-17 -9.8066E-16 -4.8215E-14 -2.5948E-12 -4.1167E-13 6.9126E-13 -2.0913E-15 2.4695E-15 3.2860E-13 6.2116E-12 5.7511E-17 -2.0913E-15 5.3519E-13 -1.4178E-13 -1.0436E-14 -2.2317E-14 -9.8066E-16 2.4695E-15 -1.4178E-13 5.0037E-14 1.9345E-15 2.4069E-14 -4.8215E-14 3.2860E-13 -1.0436E-14 1.9345E-15 1.1938E-12 3.4086E-12 -2.5948E-12 6.2116E-12 -2.2317E-14 2.4069E-14 3.4086E-12 6.0221E-11 # lat0 lon0 xBary yBary zBary JD0 -4.902393 0.437857 -0.180343 -0.083976 -0.980356 2456569.727038 # Heliocentric elements and errors Epoch: 2456570.5000 = 2013/10/05 Mean Anomaly: 358.31110 +/- 0.769 Argument of Peri: 273.95284 +/- 0.808 Long of Asc Node: 88.49953 +/- 0.007 Inclination: 4.79373 +/- 0.000 Eccentricity: 0.02439044 +/- 0.0001 Semi-Major Axis: 44.02723945 +/- 0.0077 Time of Perihelion: 2457071.0891 +/- 229.7 Perihelion: 42.95339589 +/- 0.0095 Aphelion: 45.10108301 +/- 0.0098 Period (y) 292.1396 +/- 0.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 42.80080741 +/- 0.0019 Ecliptic Y 0.51054030 +/- 0.0000 Ecliptic Z -3.58701618 +/- 0.0002 Ecliptic XDOT -0.00003293 +/- 0.0000 Ecliptic YDOT 0.00265629 +/- 0.0000 Ecliptic ZDOT 0.00000859 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.95388798 +/- 0.0019 Geocenter to KBO 41.97352701 +/- 0.0019 # Hcoef: 7.30
The following table shows the complete astrometric record for 16RX81. 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 (16RX81) followed by the observatory code and reference code for the source of the astrometry.
2013 10 04.22626 00 09 25.271 -04 19 22.59 23.9r 16RX81 W84 C~52Zi 2013 10 04.22766 00 09 25.280 -04 19 22.59 23.1i 16RX81 W84 C~52Zi 2014 11 13.14698 00 11 50.115 -04 00 44.48 22.6z 16RX81 W84 C~52Zi 2016 09 09.34532 00 25 44.076 -02 31 41.72 23.6r 16RX81 W84 C~52Zi 2016 09 10.34056 00 25 40.028 -02 32 10.12 22.6z 16RX81 W84 C~52Zi 2016 11 25.09132 00 20 57.155 -02 59 10.51 23.7i 16RX81 W84 C~52Zi 2017 09 18.23881 00 29 58.132 -02 03 38.77 23.5i 16RX81 W84 C~52Zi 2017 09 18.24019 00 29 58.137 -02 03 39.03 23.9r 16RX81 W84 C~52Zi 2017 09 27.21712 00 29 19.334 -02 07 54.64 24.5g 16RX81 W84 C~52Zi 2017 10 22.18983 00 27 32.463 -02 18 42.74 23.0i 16RX81 W84 C~52Zi 2018 10 18.18369 00 32 39.758 -01 44 51.56 23.8i 16RX81 W84 C~52Zi
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 -0.05 0.00 -0.05
2 0.0000 0.00 0.18 0.00 -0.01
3 1.1086 0.00 -0.24 0.00 0.14
4 2.9326 0.00 -0.05 0.00 0.01
5 2.9353 0.00 0.06 0.00 -0.05
6 3.1427 0.00 0.14 0.00 0.02
7 3.9562 0.00 -0.09 0.00 0.04
8 3.9562 0.00 0.07 0.00 -0.18
9 3.9808 0.00 0.11 0.00 0.05
10 4.0492 0.00 0.00 0.00 -0.02
11 5.0375 0.00 -0.07 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.
16RX81 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.284 44.283 44.284 ecceobj 0.030 0.030 0.030 incobj 4.796 4.796 4.796 qmin 42.015 42.015 42.015 qmax 46.336 46.337 46.334 amean 44.072 44.072 44.072 amin 43.736 43.734 43.739 amax 44.433 44.433 44.433 emean 0.028 0.028 0.028 emin 0.012 0.012 0.012 emax 0.043 0.043 0.043 imean 3.061 3.061 3.061 imin 2.446 2.446 2.446 imax 3.657 3.657 3.657 excite_mean 0.061 0.061 0.061 fracstop 1.000 1.000 1.000 cjmean 3.098 3.098 3.098 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 178.0 177.9 178.1 kozaiamp 180.0 180.0 180.0