1981 EF5

1981EF5, 17377, 1975 VK3, 1975VK3, J75V03K, J81E05F

All data for this body: [vot]

MPC data
Name (number) 1981 EF5 (17377)
a 2.59533
e 0.21389
i / sin(i) 10.4570 / 0.18150
q 2.04022
Q 3.15044
ω 225.9595
Node 224.1350
m 262.8225
n 0.2357
Epoch 2460800.5
nobs 1865
nopp 25
Years observed 1954-2025
rms 0.74
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.597
ep 0.220
sin(ip) 0.195
G 0.150
H 14.770
Mass
D 6.42 0.020
pV 0.065 0.0088
Value
Rotational Period
Period quality None
Spectral Class X
Spectral Class Score 2.689
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5966 0.2203 0.1948 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
6.42 0.020 0.020 Masiero 2011ApJ...741...68M NEATM
8.45 2.380 2.380 Masiero 2020PSJ.....1....5M NEATM
8.47 2.670 2.670 Masiero 2020PSJ.....1....5M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.033 0.0240 0.0240 Masiero 2020PSJ.....1....5M NEATM
0.036 0.0260 0.0260 Masiero 2020PSJ.....1....5M NEATM
0.075 0.0102 0.0102 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
14.77 MPC-2023-12-04 MPC-2023-12-04 Phot
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C Kl None None Movis NIR Popescu 2018A&A...617A..12P PHOT
X X 0.0958 0.3290 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X X 0.3524 0.3290 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT