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: 16EF366 # Created Sun Dec 22 02:10:39 2024 # Orbit generated from Bernstein formalism # Fitting 24 observations of 24 # Arc: 90.80d # First observation: 2016/03/07 # Last observation: 2016/06/06 Preliminary a, adot, b, bdot, g, gdot: -0.000042 0.032011 -0.000009 -0.007984 0.028598 0.000000 # Chi-squared of fit: 7.86 DOF: 42 RMS: 0.10 # Min/Max residuals: -0.16 0.25 # Exact a, adot, b, bdot, g, gdot: 1.620426E-05 2.889129E-02 -4.749610E-06 -8.055023E-03 2.812925E-02 5.325296E-03 # Covariance matrix: 2.1404E-13 -4.1965E-12 1.0456E-14 -2.1943E-13 -1.1728E-13 8.3631E-11 -4.1965E-12 4.8802E-09 -1.6833E-11 8.8542E-11 8.3136E-10 -5.1504E-09 1.0456E-14 -1.6833E-11 2.0937E-13 -1.0036E-12 -2.8835E-12 1.5650E-11 -2.1943E-13 8.8542E-11 -1.0036E-12 7.4832E-12 1.3863E-11 -3.0020E-10 -1.1728E-13 8.3136E-10 -2.8835E-12 1.3863E-11 1.4558E-10 -2.4409E-10 8.3631E-11 -5.1504E-09 1.5650E-11 -3.0020E-10 -2.4409E-10 1.1136E-07 # lat0 lon0 xBary yBary zBary JD0 10.217686 -151.784631 0.651051 0.132277 -0.733059 2457455.086239 # Heliocentric elements and errors Epoch: 2457450.5000 = 2016/03/03 Mean Anomaly: 53.32164 +/- 0.858 Argument of Peri: 74.21400 +/- 1.600 Long of Asc Node: 59.60432 +/- 0.065 Inclination: 18.21054 +/- 0.031 Eccentricity: 0.17928726 +/- 0.0110 Semi-Major Axis: 39.57558276 +/- 0.1849 Time of Perihelion: 2443981.3426 +/- 195.0 Perihelion: 32.48018481 +/- 0.4598 Aphelion: 46.67098071 +/- 0.4857 Period (y) 248.9712 +/- 1.74 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.79691310 +/- 0.0132 Ecliptic Y -16.32199165 +/- 0.0071 Ecliptic Z 6.30604887 +/- 0.0027 Ecliptic XDOT 0.00075732 +/- 0.0000 Ecliptic YDOT -0.00279179 +/- 0.0000 Ecliptic ZDOT -0.00067962 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.29348903 +/- 0.0120 Geocenter to KBO 35.55018812 +/- 0.0152 # Hcoef: 7.34
The following table shows the complete astrometric record for 16EF366. 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 (16EF366) followed by the observatory code and reference code for the source of the astrometry.
2016 03 07.58545 13 59 21.60 -01 16 46.4 23.4g 16EF366 T09 C~89T9 2016 03 07.58831 13 59 21.58 -01 16 46.4 23.4g 16EF366 T09 C~89T9 2016 03 07.60489 13 59 21.54 -01 16 46.0 23.5g 16EF366 T09 C~89T9 2016 03 07.63555 13 59 21.42 -01 16 45.0 23.7g 16EF366 T09 C~89T9 2016 03 07.64195 13 59 21.39 -01 16 44.8 23.6g 16EF366 T09 C~89T9 2016 03 16.45267 13 58 47.75 -01 12 37.0 22.6z 16EF366 T09 C~89T9 2016 03 16.53534 13 58 47.42 -01 12 34.4 22.6z 16EF366 T09 C~89T9 2016 03 16.56535 13 58 47.28 -01 12 33.6 22.4z 16EF366 T09 C~89T9 2016 03 16.58177 13 58 47.20 -01 12 33.3 22.4z 16EF366 T09 C~89T9 2016 04 15.46627 13 56 22.17 -00 58 28.7 22.4y 16EF366 T09 C~89T9 2016 04 15.48268 13 56 22.10 -00 58 28.4 22.3y 16EF366 T09 C~89T9 2016 04 15.49615 13 56 22.01 -00 58 27.9 22.3y 16EF366 T09 C~89T9 2016 04 15.50963 13 56 21.93 -00 58 27.7 22.5y 16EF366 T09 C~89TA 2016 04 15.52858 13 56 21.83 -00 58 27.2 22.6y 16EF366 T09 C~89TA 2016 06 05.36153 13 52 20.39 -00 45 32.6 23.0r 16EF366 T09 C~89TA 2016 06 05.37793 13 52 20.34 -00 45 32.8 23.0r 16EF366 T09 C~89TA 2016 06 05.39286 13 52 20.27 -00 45 32.6 22.9r 16EF366 T09 C~89TA 2016 06 05.39496 13 52 20.26 -00 45 32.6 23.0r 16EF366 T09 C~89TA 2016 06 05.40773 13 52 20.22 -00 45 32.5 23.0r 16EF366 T09 C~89TA 2016 06 06.33080 13 52 17.06 -00 45 31.6 24.0g 16EF366 T09 C~89TA 2016 06 06.34936 13 52 16.99 -00 45 31.5 23.5g 16EF366 T09 C~89TA 2016 06 06.36850 13 52 16.93 -00 45 31.3 23.5g 16EF366 T09 C~89TA 2016 06 06.38128 13 52 16.89 -00 45 31.5 23.6g 16EF366 T09 C~89TA 2016 06 06.38341 13 52 16.89 -00 45 31.5 23.8g 16EF366 T09 C~89TA
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 0.05
2 0.0000 -0.28 -0.10 -0.11 -0.08
3 0.0001 -0.98 0.19 0.06 -0.03
4 0.0001 -3.02 -0.01 0.36 0.07
5 0.0002 -3.51 -0.12 0.39 0.05
6 0.0243 -562.85 -0.03 55.58 -0.14
7 0.0245 -568.40 0.16 56.28 0.18
8 0.0246 -570.64 0.00 56.29 0.05
9 0.0246 -571.87 -0.09 56.15 -0.16
10 0.1064 -2905.18 -0.05 84.20 0.06
11 0.1065 -2906.27 0.25 84.12 0.04
12 0.1065 -2907.71 -0.05 84.11 0.09
13 0.1066 -2908.90 -0.10 83.88 -0.09
14 0.1066 -2910.48 -0.07 83.82 -0.08
15 0.2458 -6575.21 0.04 -462.02 0.04
16 0.2458 -6575.84 0.23 -462.47 -0.13
17 0.2459 -6576.89 -0.07 -462.65 -0.05
18 0.2459 -6577.03 -0.10 -462.71 -0.06
19 0.2459 -6577.63 -0.06 -462.82 0.04
20 0.2484 -6622.37 -0.02 -478.63 -0.07
21 0.2485 -6623.39 -0.12 -478.91 -0.02
22 0.2486 -6624.30 -0.09 -479.03 0.19
23 0.2486 -6624.80 0.04 -479.43 0.01
24 0.2486 -6624.80 0.15 -479.43 0.05
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.
16EF366 quality flag:1 Type: 3:2E SCATNEAR CENTAURS axisobj 39.149 39.777 38.577 ecceobj 0.175 0.196 0.152 incobj 18.251 18.185 18.312 qmin 30.867 31.750 30.018 qmax 48.554 49.423 47.081 amean 39.456 40.216 38.324 amin 39.004 39.383 37.020 amax 39.967 40.891 39.461 emean 0.192 0.178 0.161 emin 0.162 0.145 0.119 emax 0.217 0.209 0.205 imean 16.471 13.900 16.451 imin 15.821 10.796 12.941 imax 17.282 17.666 20.773 excite_mean 0.342 0.299 0.326 fracstop 1.000 1.000 1.000 cjmean 2.918 2.951 2.917 libcent 0 180.7 -180.0 -180.0 libamp 0 98.6 -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 188.2 175.6 174.7 kozaiamp 180.0 179.9 179.9