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: 20FY30
# Created Wed Jul 2 01:11:47 2025
# Orbit generated from Bernstein formalism
# Fitting 11 observations of 11
# Arc: 0.82y
# First observation: 2020/03/24
# Last observation: 2021/01/18
Preliminary a, adot, b, bdot, g, gdot:
-0.000003 0.004545 -0.000003 -0.000918 0.010151 0.000000
# Chi-squared of fit: 2.05 DOF: 16 RMS: 0.08
# Min/Max residuals: -0.21 0.15
# Exact a, adot, b, bdot, g, gdot:
6.757048E-06 4.620453E-03 -1.442339E-06 -9.396388E-04 1.017021E-02 -1.422328E-03
# Covariance matrix:
7.3325E-13 4.5579E-13 4.4350E-14 -3.4347E-13 1.1563E-12 2.3377E-10
4.5579E-13 1.3467E-10 4.3586E-12 -3.5213E-11 5.7270E-11 1.9351E-08
4.4350E-14 4.3586E-12 4.0729E-13 -1.6493E-12 1.9009E-12 6.3780E-10
-3.4347E-13 -3.5213E-11 -1.6493E-12 1.1211E-11 -1.5334E-11 -5.1497E-09
1.1563E-12 5.7270E-11 1.9009E-12 -1.5334E-11 2.5905E-11 8.4993E-09
2.3377E-10 1.9351E-08 6.3780E-10 -5.1497E-09 8.4993E-09 2.8393E-06
# lat0 lon0 xBary yBary zBary JD0
7.934634 -146.510971 0.499871 0.119684 -0.859167 2458932.931491
# Heliocentric elements and errors
Epoch: 2458930.5000 = 2020/03/22
Mean Anomaly: 229.44372 +/- 27.348
Argument of Peri: 304.95209 +/- 20.907
Long of Asc Node: 67.28627 +/- 0.094
Inclination: 13.84788 +/- 0.032
Eccentricity: 0.48988681 +/- 0.0699
Semi-Major Axis: 70.49667716 +/- 5.9034
Time of Perihelion: 2537336.0268 +/- 13143.2
Perihelion: 35.96128522 +/- 5.7740
Aphelion: 105.03206910 +/- 10.0811
Period (y) 591.9175 +/- 74.35
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -82.21272417 +/- 0.0407
Ecliptic Y -53.80441437 +/- 0.0269
Ecliptic Z 13.57317817 +/- 0.0068
Ecliptic XDOT 0.00098168 +/- 0.0004
Ecliptic YDOT -0.00084459 +/- 0.0003
Ecliptic ZDOT -0.00030362 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 99.18708679 +/- 0.0367
Geocenter to KBO 98.32638989 +/- 0.0492
# Hcoef: 4.62
The following table shows the complete astrometric record for 20FY30. 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 (20FY30) followed by the observatory code and reference code for the source of the astrometry.
2020 03 24.43069 14 15 50.393 -05 12 20.36 24.3r 20FY30 568 C~4ZhP 2020 03 24.60765 14 15 50.065 -05 12 18.25 24.2r 20FY30 568 C~4ZhP 2020 05 27.16312 14 13 42.797 -05 01 46.26 24.6r 20FY30 G37 C~4ZhP 2020 05 27.16918 14 13 42.791 -05 01 45.96 24.7r 20FY30 G37 C~4ZhP 2020 05 27.17673 14 13 42.778 -05 01 45.85 24.5r 20FY30 G37 C~4ZhP 2020 05 27.23629 14 13 42.661 -05 01 45.61 24.5r 20FY30 G37 C~4ZhP 2020 05 27.24364 14 13 42.652 -05 01 45.65 24.6r 20FY30 G37 C~4ZhP 2020 06 11.21302 14 13 18.240 -05 00 33.87 24.4r 20FY30 G37 C~4ZhP 2020 06 11.27376 14 13 18.154 -05 00 33.51 24.8r 20FY30 G37 C~4ZhP 2021 01 17.36133 14 17 33.389 -05 29 06.30 24.5r 20FY30 304 C~4ZhP 2021 01 18.36326 14 17 33.907 -05 29 04.29 24.5r 20FY30 304 C~4ZhP
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 0.09 0.00 -0.00
2 0.0005 -5.32 -0.09 0.36 0.03
3 0.1745 -2008.71 0.03 -37.98 -0.21
4 0.1745 -2008.89 0.01 -37.72 0.06
5 0.1745 -2009.11 0.00 -37.69 0.12
6 0.1747 -2010.84 -0.07 -38.04 -0.04
7 0.1747 -2010.96 0.02 -38.13 -0.10
8 0.2157 -2378.80 0.00 -92.30 -0.01
9 0.2159 -2380.13 -0.00 -92.39 0.15
10 0.8184 1785.36 0.05 -436.71 -0.04
11 0.8212 1791.98 -0.05 -432.24 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.
20FY30 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