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: 18HK14
# Created Tue Apr 1 01:11:09 2025
# Orbit generated from Bernstein formalism
# Fitting 17 observations of 17
# Arc: 4.19y
# First observation: 2015/01/25
# Last observation: 2019/04/06
Preliminary a, adot, b, bdot, g, gdot:
0.000009 0.020715 0.000000 0.000540 0.022576 0.000000
# Chi-squared of fit: 4.72 DOF: 28 RMS: 0.09
# Min/Max residuals: -0.17 0.26
# Exact a, adot, b, bdot, g, gdot:
1.426713E-05 2.059865E-02 1.888030E-07 5.357883E-04 2.250903E-02 5.688117E-04
# Covariance matrix:
3.6667E-13 -2.3621E-13 6.8792E-16 -3.5674E-15 -1.4430E-13 -1.7686E-12
-2.3621E-13 1.6723E-12 -8.1810E-15 3.7273E-14 2.2387E-12 1.9329E-11
6.8792E-16 -8.1810E-15 3.4908E-13 -9.9461E-14 -1.1183E-14 -9.6789E-14
-3.5674E-15 3.7273E-14 -9.9461E-14 3.8273E-14 4.7916E-14 4.5149E-13
-1.4430E-13 2.2387E-12 -1.1183E-14 4.7916E-14 3.3680E-12 2.5419E-11
-1.7686E-12 1.9329E-11 -9.6789E-14 4.5149E-13 2.5419E-11 2.3216E-10
# lat0 lon0 xBary yBary zBary JD0
1.928034 176.219884 0.766368 0.020823 -0.614049 2457048.074250
# Heliocentric elements and errors
Epoch: 2457040.5000 = 2015/01/18
Mean Anomaly: 162.15735 +/- 0.930
Argument of Peri: 247.86322 +/- 0.933
Long of Asc Node: 123.87389 +/- 0.010
Inclination: 2.43328 +/- 0.000
Eccentricity: 0.04033996 +/- 0.0003
Semi-Major Axis: 43.37797706 +/- 0.0073
Time of Perihelion: 2410036.3162 +/- 269.3
Perihelion: 41.62811118 +/- 0.0140
Aphelion: 45.12784294 +/- 0.0143
Period (y) 285.7013 +/- 0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.87038333 +/- 0.0036
Ecliptic Y 3.73258132 +/- 0.0002
Ecliptic Z 1.49469292 +/- 0.0001
Ecliptic XDOT -0.00023581 +/- 0.0000
Ecliptic YDOT -0.00250102 +/- 0.0000
Ecliptic ZDOT 0.00006756 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.05016726 +/- 0.0036
Geocenter to KBO 44.42661570 +/- 0.0036
# Hcoef: 7.28
The following table shows the complete astrometric record for 18HK14. 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 (18HK14) followed by the observatory code and reference code for the source of the astrometry.
2015 01 25.573472 11 49 11.44 +03 16 19.5 18HK14 T09 C~8MgL 2015 01 25.583865 11 49 11.41 +03 16 19.7 18HK14 T09 C~8MgL 2015 01 25.630699 11 49 11.30 +03 16 20.4 18HK14 T09 C~8MgL 2015 01 25.636989 11 49 11.28 +03 16 20.6 18HK14 T09 C~8MgL 2018 03 10.508383 11 59 55.29 +02 13 48.6 18HK14 T09 C~8MgL 2018 03 14.324555 11 59 39.391 +02 15 35.17 23.6g 18HK14 W84 C~8MgL 2018 03 18.45265 11 59 22.04 +02 17 30.4 23.7i 18HK14 T09 C~8MgL 2018 03 18.49758 11 59 21.84 +02 17 31.7 23.5i 18HK14 T09 C~8MgL 2018 03 18.50025 11 59 21.83 +02 17 31.5 23.6i 18HK14 T09 C~8MgL 2018 03 18.57070 11 59 21.51 +02 17 33.4 23.7i 18HK14 T09 C~8MgL 2018 04 24.36552 11 56 56.70 +02 32 55.0 23.5z 18HK14 T09 C~8MgL 2018 04 24.39333 11 56 56.60 +02 32 55.7 23.6z 18HK14 T09 C~8MgL 2018 04 24.48001 11 56 56.30 +02 32 57.5 23.8z 18HK14 T09 C~8MgL 2019 02 05.531075 12 06 18.03 +01 33 12.0 18HK14 T09 C~8MgL 2019 02 05.665186 12 06 17.66 +01 33 14.7 18HK14 T09 C~8MgL 2019 04 04.478301 12 02 36.87 +01 58 15.6 18HK14 T09 C~8MgL 2019 04 06.317055 12 02 29.41 +01 59 03.3 18HK14 T09 C~8MgL
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 0.04 0.00 0.04
2 0.0000 -0.49 -0.03 0.00 0.02
3 0.0002 -2.28 0.05 -0.01 -0.08
4 0.0002 -2.64 -0.06 0.06 -0.03
5 3.1210 10350.80 -0.00 406.02 -0.10
6 3.1314 10089.13 0.01 408.47 0.01
7 3.1427 9804.02 0.04 410.19 0.25
8 3.1428 9800.75 -0.08 410.18 0.26
9 3.1429 9800.69 0.05 409.94 0.01
10 3.1430 9795.53 -0.17 409.76 -0.15
11 3.2438 7433.70 0.18 387.92 -0.10
12 3.2439 7432.04 0.05 387.97 -0.00
13 3.2441 7427.19 -0.05 387.82 0.01
14 4.0300 16611.46 0.01 468.97 -0.02
15 4.0304 16605.26 0.10 469.23 0.00
16 4.1887 12952.21 -0.08 519.59 -0.06
17 4.1937 12830.16 -0.04 518.56 -0.07
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.
18HK14 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.036 43.056 43.017 ecceobj 0.049 0.049 0.050 incobj 2.437 2.437 2.437 qmin 39.926 39.945 39.846 qmax 46.731 46.660 46.745 amean 43.197 43.217 43.177 amin 42.857 42.877 42.847 amax 43.559 43.572 43.534 emean 0.055 0.054 0.056 emin 0.034 0.033 0.035 emax 0.073 0.072 0.074 imean 1.987 1.974 2.000 imin 0.811 0.812 0.810 imax 2.868 2.835 2.893 excite_mean 0.066 0.065 0.067 fracstop 1.000 1.000 1.000 cjmean 3.087 3.087 3.086 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 181.0 180.7 181.3 kozaiamp 180.0 180.0 180.0