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: 17QV219 # Created Sun Oct 19 01:11:50 2025 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 0.97y # First observation: 2016/08/28 # Last observation: 2017/08/19 Preliminary a, adot, b, bdot, g, gdot: 0.000001 0.018083 0.000001 -0.004340 0.020997 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 4.96 DOF: 31 RMS: 0.09 # Min/Max residuals: -0.20 0.18 # Exact a, adot, b, bdot, g, gdot: 1.373278E-05 1.789737E-02 -2.580780E-06 -4.316090E-03 2.140687E-02 -5.753600E-03 # Covariance matrix: 5.0777E-13 2.0345E-11 4.0489E-15 -4.7363E-12 1.5532E-11 1.1160E-09 2.0345E-11 2.2492E-08 7.1086E-12 -5.1118E-09 1.6877E-08 1.2050E-06 4.0489E-15 7.1086E-12 4.7758E-13 -2.1277E-12 5.3563E-12 3.8110E-10 -4.7363E-12 -5.1118E-09 -2.1277E-12 1.1624E-09 -3.8359E-09 -2.7387E-07 1.5532E-11 1.6877E-08 5.3563E-12 -3.8359E-09 1.2666E-08 9.0423E-07 1.1160E-09 1.2050E-06 3.8110E-10 -2.7387E-07 9.0423E-07 6.4559E-05 # lat0 lon0 xBary yBary zBary JD0 15.480952 -24.592861 -0.000179 0.270268 -0.975367 2457628.790409 # Heliocentric elements and errors Epoch: 2457620.5000 = 2016/08/20 Mean Anomaly: 282.26521 +/- 62.278 Argument of Peri: 242.88460 +/- 27.620 Long of Asc Node: 202.37376 +/- 0.311 Inclination: 20.33300 +/- 0.097 Eccentricity: 0.29705294 +/- 0.3637 Semi-Major Axis: 46.56150747 +/- 11.2766 Time of Perihelion: 2482678.8184 +/- 17893.1 Perihelion: 32.73027498 +/- 18.6973 Aphelion: 60.39273995 +/- 22.3760 Period (y) 317.7231 +/- 115.42 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 41.85239861 +/- 0.2152 Ecliptic Y -19.15906501 +/- 0.0985 Ecliptic Z 12.46872478 +/- 0.0655 Ecliptic XDOT 0.00044331 +/- 0.0009 Ecliptic YDOT 0.00230822 +/- 0.0004 Ecliptic ZDOT -0.00072843 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 47.68817609 +/- 0.1937 Geocenter to KBO 46.71396634 +/- 0.2456 # Hcoef: 8.69
The following table shows the complete astrometric record for 17QV219. 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 (17QV219) followed by the observatory code and reference code for the source of the astrometry.
2016 08 28.28962 22 06 19.94 +04 53 47.5 25.0i 17QV219 T09 C~94uu 2016 08 28.30044 22 06 19.90 +04 53 47.5 25.1i 17QV219 T09 C~94uu 2016 08 28.30855 22 06 19.87 +04 53 47.2 25.1i 17QV219 T09 C~94uu 2017 06 24.46265 22 14 06.20 +05 14 29.0 25.5i 17QV219 T09 C~94uu 2017 06 24.46602 22 14 06.19 +05 14 29.0 24.9i 17QV219 T09 C~94uu 2017 06 24.46869 22 14 06.19 +05 14 29.2 25.4i 17QV219 T09 C~94uu 2017 06 24.48739 22 14 06.15 +05 14 29.3 25.8i 17QV219 T09 C~94uu 2017 06 24.49273 22 14 06.15 +05 14 29.3 25.5i 17QV219 T09 C~94uu 2017 08 18.32705 22 11 13.95 +05 06 21.7 25.8g 17QV219 T09 C~94uu 2017 08 18.33960 22 11 13.88 +05 06 21.4 26.0g 17QV219 T09 C~94uu 2017 08 18.35014 22 11 13.86 +05 06 21.2 25.6g 17QV219 T09 C~94uu 2017 08 18.35223 22 11 13.84 +05 06 21.1 26.4g 17QV219 T09 C~94uu 2017 08 18.36060 22 11 13.81 +05 06 21.1 25.2g 17QV219 T09 C~94uu 2017 08 19.34646 22 11 09.84 +05 05 58.8 25.4r 17QV219 T09 C~94uu 2017 08 19.35919 22 11 09.81 +05 05 58.5 25.1r 17QV219 T09 C~94uu 2017 08 19.36971 22 11 09.76 +05 05 58.0 25.2r 17QV219 T09 C~94uu 2017 08 19.37181 22 11 09.75 +05 05 58.0 25.5r 17QV219 T09 C~94uu 2017 08 19.38020 22 11 09.71 +05 05 58.0 25.5r 17QV219 T09 C~94uu
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 -0.13
2 0.0000 -0.56 0.05 0.22 0.12
3 0.0001 -1.08 0.06 0.10 0.02
4 0.8218 6946.73 -0.01 -1362.43 -0.10
5 0.8218 6946.59 -0.08 -1362.37 -0.09
6 0.8218 6946.66 0.05 -1362.19 0.05
7 0.8219 6946.14 -0.05 -1361.88 0.08
8 0.8219 6946.14 0.07 -1361.88 -0.00
9 0.9720 4368.94 0.07 -888.22 -0.04
10 0.9721 4367.86 -0.20 -888.12 0.05
11 0.9721 4367.51 0.13 -888.20 -0.04
12 0.9721 4367.19 -0.05 -888.18 -0.03
13 0.9721 4366.77 0.07 -888.02 0.12
14 0.9748 4303.38 -0.12 -887.38 0.16
15 0.9749 4302.85 0.18 -887.50 0.03
16 0.9749 4301.98 -0.02 -887.70 -0.17
17 0.9749 4301.84 -0.02 -887.64 -0.12
18 0.9749 4301.28 -0.03 -887.43 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.
17QV219 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0