1981 EX31

1981EX31, 43747, J81E31X

All data for this body: [vot]

MPC data
Name (number) 1981 EX31 (43747)
a 2.81662
e 0.12853
i / sin(i) 5.5519 / 0.09675
q 2.45461
Q 3.17864
ω 206.2922
Node 176.5386
m 277.1451
n 0.2085
Epoch 2460800.5
nobs 3062
nopp 23
Years observed 1981-2025
rms 0.67
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.815
ep 0.097
sin(ip) 0.095
G 0.150
H 13.910
Mass
D 5.58 0.154
pV 0.220 0.0238
Value
Rotational Period
Period quality None
Spectral Class None
Spectral Class Score
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.8154 0.0965 0.0953 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
5.55 0.174 0.174 Masiero 2011ApJ...741...68M NEATM
5.67 0.330 0.330 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.219 0.0250 0.0250 Masiero 2011ApJ...741...68M NEATM
0.228 0.0785 0.0785 Masiero 2011ApJ...741...68M 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
13.91 MPC-2023-12-04 MPC-2023-12-04 Phot