1981 EJ20

1981EJ20, 16380, 1997 YQ21, 1997YQ21, J81E20J, J97Y21Q

All data for this body: [vot]

MPC data
Name (number) 1981 EJ20 (16380)
a 2.66668
e 0.09363
i / sin(i) 8.9543 / 0.15565
q 2.41700
Q 2.91636
ω 103.1382
Node 359.0023
m 336.3177
n 0.2263
Epoch 2460200.5
nobs 1519
nopp 19
Years observed 1981-2023
rms 0.64
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.666
ep 0.111
sin(ip) 0.159
Value Standard error
G 0.150
H 14.890
Mass
D 7.25 1.019
pV 0.040 0.0108
Rotational Period
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6662 0.1105 0.1589 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Oct-2022
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
6.54 2.010 2.010 Masiero 2021PSJ.....2..162M NEATM
7.08 2.240 2.240 Masiero 2012ApJ...759L...8M NEATM
7.42 1.930 1.930 Masiero 2021PSJ.....2..162M NEATM
7.90 2.010 2.010 Masiero 2021PSJ.....2..162M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.033 0.0120 0.0190 Masiero 2021PSJ.....2..162M NEATM
0.039 0.0190 0.0360 Masiero 2021PSJ.....2..162M NEATM
0.050 0.0210 0.0350 Masiero 2021PSJ.....2..162M NEATM
0.051 0.0230 0.0230 Masiero 2012ApJ...759L...8M NEATM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
14.89 MPC-2023-12-04 MPC-2023-12-04 Phot