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: 16QQ164 # Created Mon Jul 7 01:11:12 2025 # Orbit generated from Bernstein formalism # Fitting 21 observations of 21 # Arc: 1.06y # First observation: 2016/07/29 # Last observation: 2017/08/19 Preliminary a, adot, b, bdot, g, gdot: -0.000066 0.017194 0.000002 0.002944 0.020185 0.000000 # Chi-squared of fit: 11.15 DOF: 36 RMS: 0.13 # Min/Max residuals: -0.25 0.30 # Exact a, adot, b, bdot, g, gdot: 1.270070E-05 1.728964E-02 1.676825E-06 2.962884E-03 2.051347E-02 4.740666E-03 # Covariance matrix: 2.8749E-13 5.0596E-13 -1.5181E-14 1.5474E-13 7.2751E-13 4.8512E-11 5.0596E-13 6.2903E-12 -1.2526E-13 1.2689E-12 5.3711E-12 4.0586E-10 -1.5181E-14 -1.2526E-13 1.9521E-13 -2.2531E-13 -1.1587E-13 -8.5394E-12 1.5474E-13 1.2689E-12 -2.2531E-13 5.9492E-13 1.1814E-12 8.6557E-11 7.2751E-13 5.3711E-12 -1.1587E-13 1.1814E-12 5.5775E-12 3.7007E-10 4.8512E-11 4.0586E-10 -8.5394E-12 8.6557E-11 3.7007E-10 2.7635E-08 # lat0 lon0 xBary yBary zBary JD0 14.360161 -22.877127 0.514179 0.217209 -0.848006 2457598.863849 # Heliocentric elements and errors Epoch: 2457590.5000 = 2016/07/21 Mean Anomaly: 79.63290 +/- 1.303 Argument of Peri: 306.99389 +/- 0.657 Long of Asc Node: 282.15019 +/- 0.007 Inclination: 17.18700 +/- 0.001 Eccentricity: 0.25292121 +/- 0.0082 Semi-Major Axis: 48.71414537 +/- 0.2187 Time of Perihelion: 2430119.7139 +/- 409.7 Perihelion: 36.39330465 +/- 0.4309 Aphelion: 61.03498609 +/- 0.4838 Period (y) 340.0093 +/- 2.29 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 44.11379238 +/- 0.0050 Ecliptic Y -19.17548043 +/- 0.0021 Ecliptic Z 12.09054945 +/- 0.0014 Ecliptic XDOT 0.00137271 +/- 0.0000 Ecliptic YDOT 0.00191890 +/- 0.0000 Ecliptic ZDOT 0.00053999 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 49.59745068 +/- 0.0045 Geocenter to KBO 48.74844547 +/- 0.0056 # Hcoef: 7.76
The following table shows the complete astrometric record for 16QQ164. 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 (16QQ164) followed by the observatory code and reference code for the source of the astrometry.
2016 07 29.36306 22 14 10.16 +04 27 32.0 24.3z 16QQ164 T09 C~8vII 2016 07 29.37457 22 14 10.10 +04 27 31.6 24.0z 16QQ164 T09 C~8vII 2016 07 29.38538 22 14 10.08 +04 27 31.6 24.1z 16QQ164 T09 C~8vII 2016 07 29.39615 22 14 10.04 +04 27 31.6 24.6z 16QQ164 T09 C~8vII 2016 07 29.39883 22 14 10.03 +04 27 31.6 24.7z 16QQ164 T09 C~8vII 2016 08 28.28693 22 12 15.99 +04 19 44.3 24.3i 16QQ164 T09 C~8vII 2016 08 28.29233 22 12 15.95 +04 19 44.2 23.9i 16QQ164 T09 C~8vII 2016 08 28.30317 22 12 15.91 +04 19 44.2 23.7i 16QQ164 T09 C~8vII 2017 06 20.48411 22 19 14.62 +04 57 54.5 24.0z 16QQ164 T09 C~8vII 2017 06 20.48748 22 19 14.61 +04 57 54.5 24.4z 16QQ164 T09 C~8vII 2017 06 20.49352 22 19 14.59 +04 57 54.5 24.6z 16QQ164 T09 C~8vII 2017 06 20.51510 22 19 14.58 +04 57 54.8 24.0z 16QQ164 T09 C~8vII 2017 06 20.52581 22 19 14.56 +04 57 55.0 24.6z 16QQ164 T09 C~8vII 2017 06 20.53116 22 19 14.55 +04 57 55.0 24.5z 16QQ164 T09 C~8vII 2017 08 18.32984 22 16 22.41 +04 54 13.4 25.4g 16QQ164 T09 C~8vII 2017 08 18.35223 22 16 22.31 +04 54 13.4 25.8g 16QQ164 T09 C~8vII 2017 08 18.35432 22 16 22.31 +04 54 13.3 25.5g 16QQ164 T09 C~8vII 2017 08 18.36270 22 16 22.28 +04 54 13.1 25.3g 16QQ164 T09 C~8vII 2017 08 19.34926 22 16 18.45 +04 53 55.6 25.0r 16QQ164 T09 C~8vII 2017 08 19.37181 22 16 18.37 +04 53 55.1 25.9r 16QQ164 T09 C~8vII 2017 08 19.38230 22 16 18.29 +04 53 54.9 25.5r 16QQ164 T09 C~8vII
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 0.13
2 0.0000 -0.98 -0.24 -0.04 -0.04
3 0.0001 -1.26 0.05 0.07 -0.05
4 0.0001 -1.82 0.06 0.29 0.05
5 0.0001 -1.96 0.06 0.34 0.08
6 0.0819 -1759.87 0.11 193.30 -0.18
7 0.0819 -1760.46 -0.14 193.43 -0.07
8 0.0820 -1761.02 -0.02 193.65 0.13
9 0.8929 4903.63 0.05 26.16 -0.03
10 0.8929 4903.49 -0.04 26.22 -0.04
11 0.8929 4903.21 -0.22 26.33 -0.04
12 0.8930 4903.18 0.09 26.66 -0.10
13 0.8930 4902.98 0.05 26.96 -0.00
14 0.8930 4902.84 -0.00 27.01 -0.04
15 1.0540 2427.20 -0.08 763.46 -0.12
16 1.0540 2425.81 -0.10 764.01 0.30
17 1.0540 2425.77 -0.01 763.91 0.20
18 1.0541 2425.28 0.02 763.89 0.13
19 1.0568 2365.61 0.19 768.61 -0.07
20 1.0568 2364.31 0.29 768.59 -0.21
21 1.0569 2363.12 -0.25 768.84 -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.
16QQ164 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 48.939 49.585 48.366 ecceobj 0.248 0.270 0.226 incobj 17.206 17.209 17.203 qmin 35.957 35.338 36.457 qmax 62.447 64.393 60.724 amean 48.926 49.551 48.302 amin 48.437 49.071 47.822 amax 49.474 50.119 48.846 emean 0.248 0.268 0.224 emin 0.233 0.250 0.207 emax 0.263 0.285 0.244 imean 18.920 18.990 18.960 imin 18.306 18.441 18.364 imax 19.431 19.488 19.444 excite_mean 0.408 0.422 0.395 fracstop 1.000 1.000 1.000 cjmean 2.951 2.944 2.957 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 180.2 171.8 172.4 kozaiamp 180.0 180.0 180.0