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 Tue Jan 21 02:10:52 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 29 observations of 29 # Arc: 9.09y # First observation: 2013/04/20 # Last observation: 2022/05/23 # Chi-squared of fit: 11.10 DOF: 52 RMS: 0.11 # Min/Max residuals: -0.23 0.27 # Exact a, adot, b, bdot, g, gdot: 1.655072E-05 3.018627E-02 -4.386963E-06 -7.757935E-03 2.872529E-02 4.744159E-03 # Covariance matrix: 1.3184E-12 -5.7964E-13 -2.5725E-13 1.2746E-13 -1.9339E-13 -1.6658E-12 -5.7964E-13 2.7439E-13 1.3052E-13 -6.4735E-14 9.4244E-14 8.4591E-13 -2.5725E-13 1.3052E-13 4.4395E-13 -1.3579E-13 4.6939E-14 4.5620E-13 1.2746E-13 -6.4735E-14 -1.3579E-13 4.9059E-14 -2.0515E-14 -2.2728E-13 -1.9339E-13 9.4244E-14 4.6939E-14 -2.0515E-14 1.9176E-13 2.7187E-13 -1.6658E-12 8.4591E-13 4.5620E-13 -2.2728E-13 2.7187E-13 2.9685E-12 # lat0 lon0 xBary yBary zBary JD0 11.594196 -157.911967 -0.142937 0.200284 -0.975981 2456402.754571 # Heliocentric elements and errors Epoch: 2456402.5000 = 2013/04/20 Mean Anomaly: 50.91074 +/- 0.010 Argument of Peri: 71.99584 +/- 0.012 Long of Asc Node: 59.50380 +/- 0.001 Inclination: 18.25393 +/- 0.000 Eccentricity: 0.18139736 +/- 0.0001 Semi-Major Axis: 39.36895797 +/- 0.0028 Time of Perihelion: 2443642.9238 +/- 2.8 Perihelion: 32.22753277 +/- 0.0034 Aphelion: 46.51038317 +/- 0.0042 Period (y) 247.0240 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -32.46800139 +/- 0.0005 Ecliptic Y -13.32857294 +/- 0.0002 Ecliptic Z 6.99643783 +/- 0.0001 Ecliptic XDOT 0.00052743 +/- 0.0000 Ecliptic YDOT -0.00288814 +/- 0.0000 Ecliptic ZDOT -0.00063331 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 35.78778182 +/- 0.0004 Geocenter to KBO 34.81247246 +/- 0.0005 # Hcoef: 7.35
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.
2013 04 20.253793 13 38 53.14 +02 10 13.1 16EF366 W84 C~8Zn5 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 2016 06 07.047049 13 52 14.669 -00 45 31.14 22.8r 16EF366 W84 C~8Zn5 2017 04 01.316803 14 03 11.354 -02 06 00.25 24.2g 16EF366 W84 C~8Zn5 2017 05 22.169245 13 58 52.565 -01 47 45.49 22.5r 16EF366 W84 C~8Zn5 2022 05 23.267814 14 26 02.16 -06 41 06.7 16EF366 W84 C~8Zn5
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 0.02 0.00 0.02
2 2.8811 0.00 0.01 0.00 0.03
3 2.8811 0.00 -0.14 0.00 -0.04
4 2.8812 0.00 0.15 0.00 -0.10
5 2.8813 0.00 -0.00 0.00 0.06
6 2.8813 0.00 -0.11 0.00 0.08
7 2.9054 0.00 -0.08 0.00 -0.12
8 2.9056 0.00 0.21 0.00 0.10
9 2.9057 0.00 0.02 0.00 0.04
10 2.9058 0.00 -0.14 0.00 -0.13
11 2.9876 0.00 -0.01 0.00 0.08
12 2.9876 0.00 0.27 0.00 -0.05
13 2.9877 0.00 0.01 0.00 0.10
14 2.9877 0.00 -0.10 0.00 -0.05
15 2.9877 0.00 -0.07 0.00 -0.04
16 3.1269 0.00 0.02 0.00 0.07
17 3.1270 0.00 0.15 0.00 -0.15
18 3.1270 0.00 -0.11 0.00 0.02
19 3.1270 0.00 -0.14 0.00 0.02
20 3.1270 0.00 -0.06 0.00 0.10
21 3.1296 0.00 -0.07 0.00 -0.02
22 3.1296 0.00 -0.15 0.00 0.07
23 3.1297 0.00 -0.05 0.00 0.25
24 3.1297 0.00 0.02 0.00 0.04
25 3.1297 0.00 0.13 0.00 0.04
26 3.1315 0.00 0.17 0.00 -0.19
27 3.9482 0.00 -0.19 0.00 -0.23
28 4.0874 0.00 0.05 0.00 0.02
29 9.0897 0.00 0.03 0.00 0.03
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:3 Type: 3:2E 3:2E 3:2E axisobj 39.201 39.201 39.200 ecceobj 0.178 0.178 0.178 incobj 18.252 18.252 18.252 qmin 30.118 30.132 30.133 qmax 49.070 49.292 49.312 amean 39.455 39.456 39.455 amin 39.014 39.012 39.035 amax 39.962 39.952 39.956 emean 0.203 0.203 0.203 emin 0.170 0.170 0.170 emax 0.235 0.236 0.236 imean 16.106 16.113 16.110 imin 15.345 15.315 15.308 imax 17.246 17.246 17.246 excite_mean 0.344 0.344 0.344 fracstop 1.000 1.000 1.000 cjmean 2.917 2.917 2.917 libcent 0 179.3 179.4 179.6 libamp 0 87.8 87.6 87.7 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 187.6 188.3 188.6 kozaiamp 180.0 180.0 180.0