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: 16WB88 # Created Wed Apr 16 01:11:03 2025 # Orbit generated from Bernstein formalism # Fitting 26 observations of 26 # Arc: 1.05y # First observation: 2015/11/10 # Last observation: 2016/11/29 Preliminary a, adot, b, bdot, g, gdot: 0.000004 0.024265 -0.000007 0.005348 0.024575 0.000000 # Chi-squared of fit: 11.93 DOF: 46 RMS: 0.12 # Min/Max residuals: -0.30 0.25 # Exact a, adot, b, bdot, g, gdot: 1.576405E-05 2.401883E-02 3.947547E-06 5.273783E-03 2.413191E-02 -1.733913E-03 # Covariance matrix: 2.0738E-13 -1.8780E-12 1.6312E-15 -2.7465E-13 -4.1146E-13 -6.7031E-11 -1.8780E-12 1.5882E-10 3.5616E-12 2.4821E-11 6.8057E-11 6.2499E-09 1.6312E-15 3.5616E-12 2.1016E-13 4.4240E-13 1.7083E-12 1.4164E-10 -2.7465E-13 2.4821E-11 4.4240E-13 4.1356E-12 1.0658E-11 9.7833E-10 -4.1146E-13 6.8057E-11 1.7083E-12 1.0658E-11 3.0714E-11 2.6930E-09 -6.7031E-11 6.2499E-09 1.4164E-10 9.7833E-10 2.6930E-09 2.4641E-07 # lat0 lon0 xBary yBary zBary JD0 -14.279710 143.755860 0.987744 0.026813 0.104566 2457337.084959 # Heliocentric elements and errors Epoch: 2457330.5000 = 2015/11/04 Mean Anomaly: 321.50262 +/- 4.297 Argument of Peri: 358.76931 +/- 6.472 Long of Asc Node: 191.61541 +/- 0.017 Inclination: 18.60656 +/- 0.005 Eccentricity: 0.13568268 +/- 0.0157 Semi-Major Axis: 45.83186798 +/- 0.1505 Time of Perihelion: 2469449.8248 +/- 1351.4 Perihelion: 39.61327708 +/- 0.7334 Aphelion: 52.05045888 +/- 0.7417 Period (y) 310.2841 +/- 1.53 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.72115759 +/- 0.0074 Ecliptic Y 24.47408820 +/- 0.0054 Ecliptic Z -10.22102574 +/- 0.0024 Ecliptic XDOT -0.00157776 +/- 0.0000 Ecliptic YDOT -0.00222990 +/- 0.0000 Ecliptic ZDOT 0.00062841 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.34830347 +/- 0.0066 Geocenter to KBO 41.43891621 +/- 0.0095 # Hcoef: 8.21
The following table shows the complete astrometric record for 16WB88. 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 (16WB88) followed by the observatory code and reference code for the source of the astrometry.
2015 11 10.58417 09 25 37.48 +00 05 31.7 24.0i 16WB88 T09 C~8nfH 2015 11 10.58698 09 25 37.48 +00 05 31.7 24.2i 16WB88 T09 C~8nfH 2015 11 10.58979 09 25 37.48 +00 05 31.6 24.9i 16WB88 T09 C~8nfH 2015 11 10.59812 09 25 37.49 +00 05 31.6 24.5i 16WB88 T09 C~8nfH 2015 11 10.61811 09 25 37.52 +00 05 30.9 24.1i 16WB88 T09 C~8nfH 2015 11 10.62085 09 25 37.52 +00 05 30.9 24.8i 16WB88 T09 C~8nfH 2015 11 10.63776 09 25 37.54 +00 05 30.6 24.1i 16WB88 T09 C~8nfH 2016 01 09.45079 09 23 56.14 -00 02 43.3 23.5y 16WB88 T09 C~8nfH 2016 01 09.47611 09 23 56.03 -00 02 43.0 23.7y 16WB88 T09 C~8nfH 2016 01 09.49800 09 23 55.94 -00 02 42.8 23.8y 16WB88 T09 C~8nfH 2016 01 09.56634 09 23 55.66 -00 02 42.1 24.2y 16WB88 T09 C~8nfH 2016 01 09.57726 09 23 55.63 -00 02 42.1 23.7y 16WB88 T09 C~8nfH 2016 01 12.35740 09 23 44.50 -00 02 13.2 23.5z 16WB88 T09 C~8nfH 2016 01 12.36710 09 23 44.45 -00 02 13.1 24.2z 16WB88 T09 C~8nfH 2016 01 12.36978 09 23 44.43 -00 02 12.9 24.1z 16WB88 T09 C~8nfH 2016 01 12.37793 09 23 44.42 -00 02 13.1 23.9z 16WB88 T09 C~8nfH 2016 11 28.55703 09 31 19.12 -00 10 10.6 24.8r 16WB88 T09 C~8nfH 2016 11 28.57391 09 31 19.10 -00 10 10.9 24.6r 16WB88 T09 C~8nfH 2016 11 28.61822 09 31 19.07 -00 10 11.8 24.9r 16WB88 T09 C~8nfH 2016 11 28.62032 09 31 19.07 -00 10 11.8 24.8r 16WB88 T09 C~8nfH 2016 11 28.62676 09 31 19.06 -00 10 11.6 25.1r 16WB88 T09 C~8nfH 2016 11 28.63097 09 31 19.05 -00 10 12.1 24.9r 16WB88 T09 C~8nfH 2016 11 29.50009 09 31 18.48 -00 10 24.9 24.1i 16WB88 T09 C~8nfH 2016 11 29.62468 09 31 18.36 -00 10 26.7 24.2z 16WB88 T09 C~8nfH 2016 11 29.62736 09 31 18.37 -00 10 26.7 24.3z 16WB88 T09 C~8nfH 2016 11 29.63809 09 31 18.33 -00 10 27.2 23.8z 16WB88 T09 C~8nfH
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 -0.01 0.00 -0.10
2 0.0000 0.00 -0.06 0.00 -0.05
3 0.0000 0.03 -0.09 -0.09 -0.09
4 0.0000 0.17 -0.12 -0.05 0.11
5 0.0001 0.82 0.12 -0.57 -0.04
6 0.0001 0.82 0.06 -0.57 0.02
7 0.0001 1.21 0.10 -0.75 0.14
8 0.1639 -1280.98 0.12 -956.51 0.01
9 0.1640 -1282.64 -0.02 -956.76 0.02
10 0.1640 -1283.98 -0.04 -957.00 0.00
11 0.1642 -1288.19 -0.13 -957.69 0.03
12 0.1643 -1288.61 0.10 -957.83 -0.01
13 0.1719 -1456.02 0.08 -984.02 0.01
14 0.1719 -1456.76 -0.06 -984.17 -0.04
15 0.1719 -1457.11 -0.24 -984.07 0.07
16 0.1719 -1457.19 0.19 -984.31 -0.09
17 1.0513 5157.12 0.02 751.69 0.12
18 1.0513 5156.93 -0.08 751.31 0.04
19 1.0514 5156.80 0.03 750.31 -0.15
20 1.0514 5156.80 0.04 750.31 -0.12
21 1.0515 5156.59 -0.13 750.46 0.14
22 1.0515 5156.61 -0.09 749.93 -0.30
23 1.0538 5152.61 0.25 735.06 0.17
24 1.0542 5151.49 -0.01 732.78 0.13
25 1.0542 5151.63 0.15 732.83 0.23
26 1.0542 5151.22 -0.18 732.16 -0.25
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.
16WB88 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 45.582 45.946 45.495 ecceobj 0.129 0.173 0.111 incobj 18.650 18.665 18.642 qmin 38.691 36.816 39.681 qmax 52.775 55.603 51.634 amean 45.574 46.004 45.492 amin 45.203 45.612 45.114 amax 45.992 46.471 45.901 emean 0.134 0.181 0.115 emin 0.122 0.167 0.104 emax 0.148 0.198 0.126 imean 18.623 18.559 18.702 imin 18.272 18.071 18.396 imax 19.034 19.057 19.028 excite_mean 0.347 0.366 0.341 fracstop 1.000 1.000 1.000 cjmean 2.972 2.960 2.975 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 167.2 170.0 176.1 kozaiamp 180.0 180.0 180.0