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: 18FL76
# Created Sun Dec 22 02:11:02 2024
# Orbit generated from Bernstein formalism
# Fitting 14 observations of 14
# Arc: 1.14y
# First observation: 2018/02/11
# Last observation: 2019/04/04
Preliminary a, adot, b, bdot, g, gdot:
-0.000052 0.021393 0.000002 -0.005230 0.023835 0.000000
# Chi-squared of fit: 5.09 DOF: 22 RMS: 0.11
# Min/Max residuals: -0.23 0.21
# Exact a, adot, b, bdot, g, gdot:
1.345604E-05 2.134919E-02 -3.007076E-06 -5.216844E-03 2.385291E-02 -5.247896E-04
# Covariance matrix:
8.9201E-13 4.3924E-13 4.1378E-14 -3.9973E-13 1.2202E-12 6.5277E-11
4.3924E-13 2.4523E-12 1.0001E-13 -9.2069E-13 1.6473E-12 1.4995E-10
4.1378E-14 1.0001E-13 2.0290E-13 -2.8248E-13 9.5635E-14 8.1518E-12
-3.9973E-13 -9.2069E-13 -2.8248E-13 1.0443E-12 -9.0651E-13 -7.5522E-11
1.2202E-12 1.6473E-12 9.5635E-14 -9.0651E-13 2.3225E-12 1.4788E-10
6.5277E-11 1.4995E-10 8.1518E-12 -7.5522E-11 1.4788E-10 1.2305E-08
# lat0 lon0 xBary yBary zBary JD0
2.557740 178.774246 0.588743 0.035617 -0.794761 2458161.155206
# Heliocentric elements and errors
Epoch: 2458160.5000 = 2018/02/11
Mean Anomaly: 209.10873 +/- 2.764
Argument of Peri: 324.79994 +/- 2.761
Long of Asc Node: 8.19362 +/- 0.001
Inclination: 13.90113 +/- 0.002
Eccentricity: 0.08676029 +/- 0.0020
Semi-Major Axis: 39.65463625 +/- 0.0134
Time of Perihelion: 2496390.2105 +/- 699.9
Perihelion: 36.21418853 +/- 0.0813
Aphelion: 43.09508398 +/- 0.0816
Period (y) 249.7176 +/- 0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -42.65661464 +/- 0.0027
Ecliptic Y 1.49465846 +/- 0.0001
Ecliptic Z 1.87076398 +/- 0.0001
Ecliptic XDOT -0.00001283 +/- 0.0000
Ecliptic YDOT -0.00245534 +/- 0.0000
Ecliptic ZDOT -0.00060103 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.72377014 +/- 0.0027
Geocenter to KBO 41.92361216 +/- 0.0027
# Hcoef: 8.25
The following table shows the complete astrometric record for 18FL76. 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 (18FL76) followed by the observatory code and reference code for the source of the astrometry.
2018 02 11.654405 11 59 34.45 +02 50 02.8 18FL76 T09 C~8MgJ 2018 03 18.46982 11 57 08.81 +03 04 44.4 24.0i 18FL76 T09 C~8MgJ 2018 03 18.57070 11 57 08.35 +03 04 47.0 24.2i 18FL76 T09 C~8MgJ 2018 03 18.58405 11 57 08.28 +03 04 47.6 24.0i 18FL76 T09 C~8MgJ 2018 03 18.60008 11 57 08.21 +03 04 48.1 24.3i 18FL76 T09 C~8MgJ 2018 04 24.36214 11 54 32.05 +03 19 01.6 24.8z 18FL76 T09 C~8MgJ 2018 04 24.36552 11 54 32.03 +03 19 01.4 24.6z 18FL76 T09 C~8MgJ 2018 04 24.43720 11 54 31.76 +03 19 03.1 24.2z 18FL76 T09 C~8MgJ 2018 04 24.45326 11 54 31.70 +03 19 03.2 24.7z 18FL76 T09 C~8MgJ 2018 04 24.50676 11 54 31.51 +03 19 04.1 24.0z 18FL76 T09 C~8MgJ 2019 02 05.531075 12 03 56.44 +02 02 08.5 18FL76 T09 C~8MgJ 2019 02 05.662517 12 03 56.03 +02 02 11.1 18FL76 T09 C~8MgJ 2019 04 04.436418 11 59 55.83 +02 25 59.2 18FL76 T09 C~8MgJ 2019 04 04.478301 11 59 55.63 +02 26 00.3 18FL76 T09 C~8MgJ
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 0.14 0.00 -0.09
2 0.0953 -2352.43 -0.09 -59.36 -0.03
3 0.0956 -2359.79 0.05 -59.71 -0.06
4 0.0956 -2360.99 -0.16 -59.58 0.12
5 0.0957 -2362.15 -0.13 -59.54 0.21
6 0.1963 -4848.27 0.16 -205.74 0.06
7 0.1963 -4848.47 0.16 -206.04 -0.23
8 0.1965 -4852.85 -0.11 -206.09 0.12
9 0.1966 -4853.72 -0.06 -206.35 -0.05
10 0.1967 -4856.69 0.02 -206.66 -0.07
11 0.9826 4747.42 0.04 -1071.46 -0.02
12 0.9829 4740.74 -0.02 -1071.53 0.06
13 1.1411 868.73 0.08 -1196.66 -0.01
14 1.1412 865.54 -0.11 -1196.84 -0.02
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.
18FL76 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.406 39.425 39.389 ecceobj 0.092 0.096 0.091 incobj 13.963 13.963 13.963 qmin 35.332 35.056 35.351 qmax 44.120 44.307 44.047 amean 39.460 39.460 39.461 amin 39.029 39.017 39.050 amax 39.907 39.940 39.897 emean 0.083 0.089 0.083 emin 0.059 0.062 0.061 emax 0.106 0.111 0.105 imean 13.600 13.544 13.666 imin 12.849 12.635 12.918 imax 14.498 14.578 14.479 excite_mean 0.250 0.251 0.250 fracstop 1.000 1.000 1.000 cjmean 2.981 2.980 2.980 libcent 0 179.4 180.1 180.4 libamp 0 106.8 115.9 98.8 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 180.0 180.1 181.4 kozaiamp 180.0 180.0 179.9