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: 16SB56 # Created Wed Mar 26 01:10:55 2025 # Orbit generated from Bernstein formalism # Fitting 21 observations of 21 # Arc: 3.31y # First observation: 2014/08/19 # Last observation: 2017/12/09 Preliminary a, adot, b, bdot, g, gdot: 0.000016 0.022512 -0.000010 -0.003000 0.024075 0.000000 # Chi-squared of fit: 8.73 DOF: 36 RMS: 0.11 # Min/Max residuals: -0.22 0.34 # Exact a, adot, b, bdot, g, gdot: 1.528477E-05 2.226223E-02 -1.744481E-06 -2.957930E-03 2.387254E-02 -3.479007E-04 # Covariance matrix: 4.0318E-13 -1.6444E-13 1.7016E-14 1.9150E-14 1.9637E-13 -1.4847E-12 -1.6444E-13 7.2139E-13 7.5604E-14 -1.7951E-13 3.0785E-13 1.6572E-11 1.7016E-14 7.5604E-14 2.4555E-13 -1.3408E-13 6.6799E-14 1.9236E-12 1.9150E-14 -1.7951E-13 -1.3408E-13 1.2848E-13 -7.9295E-14 -4.6307E-12 1.9637E-13 3.0785E-13 6.6799E-14 -7.9295E-14 4.4124E-13 7.6976E-12 -1.4847E-12 1.6572E-11 1.9236E-12 -4.6307E-12 7.6976E-12 4.2720E-10 # lat0 lon0 xBary yBary zBary JD0 -15.643831 32.839111 0.932126 -0.108042 -0.386312 2456888.881388 # Heliocentric elements and errors Epoch: 2456880.5000 = 2014/08/11 Mean Anomaly: 219.64247 +/- 0.589 Argument of Peri: 28.30862 +/- 0.587 Long of Asc Node: 149.15668 +/- 0.002 Inclination: 17.37357 +/- 0.000 Eccentricity: 0.06581794 +/- 0.0006 Semi-Major Axis: 40.18325934 +/- 0.0036 Time of Perihelion: 2493154.8298 +/- 152.0 Perihelion: 37.53848012 +/- 0.0226 Aphelion: 42.82803855 +/- 0.0227 Period (y) 254.7276 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 34.73126197 +/- 0.0009 Ecliptic Y 21.31063766 +/- 0.0006 Ecliptic Z -11.29575900 +/- 0.0003 Ecliptic XDOT -0.00149856 +/- 0.0000 Ecliptic YDOT 0.00207043 +/- 0.0000 Ecliptic ZDOT -0.00031579 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.28472546 +/- 0.0008 Geocenter to KBO 41.88913433 +/- 0.0012 # Hcoef: 7.48
The following table shows the complete astrometric record for 16SB56. 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 (16SB56) followed by the observatory code and reference code for the source of the astrometry.
2014 08 19.38061 02 23 43.755 -02 16 28.44 23.5r 16SB56 W84 C~52Zm 2014 10 01.36775 02 21 55.953 -02 39 22.65 23.6r 16SB56 W84 C~52Zm 2014 10 01.36912 02 21 55.929 -02 39 22.99 23.4i 16SB56 W84 C~52Zm 2014 10 23.30444 02 20 21.786 -02 50 26.02 24.1g 16SB56 W84 C~52Zm 2014 12 16.15719 02 16 41.446 -03 02 31.29 23.8i 16SB56 W84 C~52Zn 2014 12 24.13761 02 16 21.165 -03 01 49.69 23.2r 16SB56 W84 C~52Zn 2015 10 14.53413 02 26 08.63 -02 29 59.1 24.9g 16SB56 T09 C~8iem 2015 10 14.55905 02 26 08.53 -02 30 00.2 24.3g 16SB56 T09 C~8iem 2015 10 14.58743 02 26 08.39 -02 30 00.9 24.8g 16SB56 T09 C~8iem 2015 10 14.61119 02 26 08.28 -02 30 01.6 24.6g 16SB56 T09 C~8iem 2016 09 24.28192 02 32 31.589 -02 03 25.72 23.9r 16SB56 W84 C~52Zn 2016 09 27.43969 02 32 20.49 -02 05 09.3 24.3g 16SB56 568 C~2eAH 2016 09 27.51196 02 32 20.23 -02 05 11.7 24.7g 16SB56 568 C~2eAH 2016 09 28.44870 02 32 16.82 -02 05 42.4 24.5g 16SB56 568 C~2eAH 2016 09 28.56839 02 32 16.38 -02 05 46.3 24.4g 16SB56 568 C~2eAH 2016 09 29.46036 02 32 13.10 -02 06 15.4 24.5g 16SB56 568 C~2eAH 2016 09 29.52080 02 32 12.87 -02 06 17.3 24.4g 16SB56 568 C~2eAH 2016 10 27.21403 02 30 14.648 -02 20 00.48 23.0r 16SB56 W84 C~52Zn 2016 10 27.25772 02 30 14.432 -02 20 01.38 22.5i 16SB56 W84 C~52Zn 2016 12 05.18383 02 27 24.236 -02 30 20.82 23.2i 16SB56 W84 C~52Zn 2017 12 09.09111 02 32 15.993 -02 14 23.93 22.2i 16SB56 W84 C~52Zn
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 -0.11 0.00 -0.04
2 0.1177 -1982.07 0.21 -755.06 0.09
3 0.1177 -1982.52 -0.15 -755.26 -0.10
4 0.1778 -3533.79 -0.01 -909.15 -0.03
5 0.3252 -6889.67 0.04 -492.10 -0.09
6 0.3470 -7162.56 -0.09 -351.61 -0.19
7 1.1531 1774.79 0.12 -1490.64 0.34
8 1.1531 1773.01 0.15 -1491.17 -0.04
9 1.1532 1770.80 0.00 -1491.13 0.17
10 1.1533 1769.01 -0.06 -1491.24 0.21
11 2.0997 7720.38 0.11 -1915.31 -0.22
12 2.1083 7528.62 -0.04 -1957.00 0.09
13 2.1085 7524.13 0.04 -1957.95 0.03
14 2.1111 7465.60 -0.15 -1969.70 0.00
15 2.1114 7458.07 -0.03 -1971.16 -0.03
16 2.1138 7401.91 0.00 -1982.06 -0.08
17 2.1140 7398.02 0.02 -1982.69 -0.02
18 2.1898 5450.54 0.06 -2163.08 -0.13
19 2.1899 5447.19 -0.02 -2162.84 0.13
20 2.2965 2835.25 -0.10 -1890.76 -0.06
21 3.3065 7278.62 0.01 -2457.11 -0.01
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.
16SB56 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 40.450 40.461 40.440 ecceobj 0.058 0.058 0.059 incobj 17.337 17.337 17.337 qmin 36.516 36.785 36.538 qmax 44.140 43.906 44.115 amean 40.232 40.249 40.221 amin 39.907 39.923 39.903 amax 40.552 40.579 40.555 emean 0.068 0.067 0.068 emin 0.050 0.053 0.050 emax 0.089 0.083 0.089 imean 16.653 16.669 16.655 imin 15.706 15.708 15.704 imax 17.821 17.757 17.786 excite_mean 0.295 0.295 0.295 fracstop 1.000 1.000 1.000 cjmean 2.959 2.959 2.959 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 180.4 174.9 179.7 kozaiamp 180.0 180.0 179.9