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: 16AB401 # Created Wed Mar 26 01:10:47 2025 # Orbit generated from Bernstein formalism # Fitting 32 observations of 32 # Arc: 0.98y # First observation: 2015/01/16 # Last observation: 2016/01/09 Preliminary a, adot, b, bdot, g, gdot: -0.000129 0.029685 -0.000009 0.008111 0.025672 0.000000 # Chi-squared of fit: 13.44 DOF: 58 RMS: 0.11 # Min/Max residuals: -0.27 0.29 # Exact a, adot, b, bdot, g, gdot: 1.645499E-05 2.946745E-02 4.406528E-06 8.053636E-03 2.724414E-02 2.358784E-04 # Covariance matrix: 1.5463E-13 2.7219E-12 2.9828E-15 8.1172E-13 1.3321E-12 9.5884E-11 2.7219E-12 1.4214E-10 1.5369E-13 4.0772E-11 6.2551E-11 4.7589E-09 2.9828E-15 1.5369E-13 9.3647E-14 -6.1248E-14 6.6335E-14 5.1369E-12 8.1172E-13 4.0772E-11 -6.1248E-14 1.1952E-11 1.7961E-11 1.3672E-09 1.3321E-12 6.2551E-11 6.6335E-14 1.7961E-11 2.9099E-11 2.1167E-09 9.5884E-11 4.7589E-09 5.1369E-12 1.3672E-09 2.1167E-09 1.5983E-07 # lat0 lon0 xBary yBary zBary JD0 -15.548157 139.383127 0.395280 -0.240739 -0.865879 2457038.959318 # Heliocentric elements and errors Epoch: 2457030.5000 = 2015/01/08 Mean Anomaly: 359.77948 +/- 2.899 Argument of Peri: 314.11184 +/- 4.468 Long of Asc Node: 182.92746 +/- 0.013 Inclination: 21.27482 +/- 0.005 Eccentricity: 0.20174382 +/- 0.0005 Semi-Major Axis: 47.07302668 +/- 0.0246 Time of Perihelion: 2457102.7599 +/- 950.0 Perihelion: 37.57633455 +/- 0.0304 Aphelion: 56.56971880 +/- 0.0376 Period (y) 322.9731 +/- 0.25 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -27.27072223 +/- 0.0053 Ecliptic Y 23.90599628 +/- 0.0046 Ecliptic Z -9.83861962 +/- 0.0019 Ecliptic XDOT -0.00211368 +/- 0.0000 Ecliptic YDOT -0.00209709 +/- 0.0000 Ecliptic ZDOT 0.00077346 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.57642060 +/- 0.0049 Geocenter to KBO 36.70513479 +/- 0.0073 # Hcoef: 8.41
The following table shows the complete astrometric record for 16AB401. 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 (16AB401) followed by the observatory code and reference code for the source of the astrometry.
2015 01 16.45854 09 07 59.04 +00 12 11.5 23.7z 16AB401 T09 C~8idC 2015 01 16.46835 09 07 58.98 +00 12 11.7 23.6z 16AB401 T09 C~8idC 2015 01 16.47112 09 07 58.97 +00 12 11.7 23.7z 16AB401 T09 C~8idC 2015 01 16.48218 09 07 58.91 +00 12 11.9 23.5z 16AB401 T09 C~8idC 2015 01 16.49318 09 07 58.86 +00 12 12.0 23.6z 16AB401 T09 C~8idC 2015 01 16.51767 09 07 58.74 +00 12 12.4 24.0z 16AB401 T09 C~8idC 2015 01 21.43754 09 07 34.81 +00 13 40.4 24.2i 16AB401 T09 C~8idC 2015 01 21.45697 09 07 34.73 +00 13 40.6 24.0i 16AB401 T09 C~8idC 2015 01 21.47327 09 07 34.65 +00 13 40.9 23.8i 16AB401 T09 C~8idC 2015 01 21.48977 09 07 34.57 +00 13 41.2 23.7i 16AB401 T09 C~8idC 2015 01 21.51165 09 07 34.46 +00 13 41.7 23.9i 16AB401 T09 C~8idC 2015 01 21.52917 09 07 34.37 +00 13 41.9 23.6i 16AB401 T09 C~8idC 2015 01 27.41176 09 07 04.92 +00 15 45.7 24.0y 16AB401 T09 C~8idC 2015 01 27.43096 09 07 04.81 +00 15 46.2 24.1y 16AB401 T09 C~8idC 2015 01 27.52973 09 07 04.30 +00 15 48.4 24.3y 16AB401 T09 C~8idC 2015 01 27.53242 09 07 04.28 +00 15 48.3 24.5y 16AB401 T09 C~8idC 2015 11 08.56993 09 17 26.99 +00 14 56.9 24.3r 16AB401 T09 C~8idC 2015 11 08.58691 09 17 27.00 +00 14 56.5 24.2r 16AB401 T09 C~8idC 2015 11 08.59330 09 17 27.00 +00 14 56.5 24.1r 16AB401 T09 C~8idC 2015 11 08.63991 09 17 27.06 +00 14 55.2 24.4r 16AB401 T09 C~8idC 2015 11 14.62376 09 17 32.18 +00 12 26.2 26.4g 16AB401 T09 C~8idC 2015 11 14.63646 09 17 32.19 +00 12 25.7 26.3g 16AB401 T09 C~8idC 2015 11 15.56997 09 17 32.64 +00 12 04.0 24.0z 16AB401 T09 C~8idC 2015 11 15.58893 09 17 32.64 +00 12 03.7 24.3z 16AB401 T09 C~8idC 2015 11 15.61872 09 17 32.66 +00 12 02.7 23.8z 16AB401 T09 C~8idC 2016 01 09.44396 09 15 32.41 +00 06 12.4 23.4y 16AB401 T09 C~8idC 2016 01 09.47070 09 15 32.29 +00 06 12.8 23.5y 16AB401 T09 C~8idC 2016 01 09.49254 09 15 32.22 +00 06 13.3 24.0y 16AB401 T09 C~8idC 2016 01 09.49531 09 15 32.18 +00 06 13.1 23.5y 16AB401 T09 C~8idC 2016 01 09.51733 09 15 32.09 +00 06 13.3 23.7y 16AB401 T09 C~8idC 2016 01 09.54463 09 15 31.97 +00 06 13.8 23.2y 16AB401 T09 C~8idC 2016 01 09.57457 09 15 31.84 +00 06 13.9 23.6y 16AB401 T09 C~8idC
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 0.13 0.00 0.06
2 0.0000 -0.92 -0.05 -0.08 0.04
3 0.0000 -1.06 0.01 -0.13 0.01
4 0.0001 -1.98 -0.08 -0.21 0.00
5 0.0001 -2.72 -0.01 -0.34 -0.06
6 0.0002 -4.56 -0.02 -0.50 -0.06
7 0.0136 -373.33 -0.27 -24.99 0.13
8 0.0137 -374.53 0.03 -25.16 0.05
9 0.0137 -375.77 0.07 -25.24 0.04
10 0.0138 -377.00 0.12 -25.31 0.04
11 0.0138 -378.72 0.10 -25.34 0.11
12 0.0139 -380.07 0.11 -25.55 -0.03
13 0.0300 -838.58 0.11 -40.91 -0.03
14 0.0300 -840.31 -0.07 -40.93 -0.02
15 0.0303 -848.27 -0.06 -41.14 -0.07
16 0.0303 -848.52 -0.10 -41.33 -0.25
17 0.8107 8075.99 0.18 2732.21 -0.14
18 0.8108 8076.25 0.04 2731.87 -0.13
19 0.8108 8076.25 -0.11 2731.87 -0.00
20 0.8109 8077.50 0.05 2730.90 -0.03
21 0.8273 8195.89 -0.03 2611.98 0.29
22 0.8273 8196.18 0.09 2611.55 0.12
23 0.8299 8209.19 -0.11 2592.89 0.08
24 0.8299 8209.28 -0.25 2592.60 0.18
25 0.8300 8209.87 -0.02 2591.74 -0.08
26 0.9801 6593.85 -0.05 1712.00 -0.17
27 0.9802 6592.01 -0.09 1711.84 -0.09
28 0.9802 6590.86 0.22 1712.00 0.27
29 0.9803 6590.35 -0.10 1711.62 -0.08
30 0.9803 6589.00 0.03 1711.41 -0.10
31 0.9804 6587.13 -0.00 1711.34 0.08
32 0.9805 6585.24 0.12 1710.85 -0.14
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.
16AB401 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 46.857 47.213 46.665 ecceobj 0.197 0.208 0.194 incobj 21.314 21.299 21.328 qmin 36.774 36.681 36.552 qmax 57.163 58.003 56.948 amean 46.746 47.082 46.568 amin 46.357 46.660 46.153 amax 47.217 47.586 47.045 emean 0.195 0.203 0.196 emin 0.180 0.186 0.181 emax 0.211 0.219 0.212 imean 21.133 21.212 21.049 imin 20.677 20.737 20.577 imax 21.592 21.703 21.518 excite_mean 0.410 0.415 0.409 fracstop 1.000 1.000 1.000 cjmean 2.924 2.923 2.923 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 179.9 182.0 182.4 kozaiamp 179.9 180.0 180.0