1981 EJ42

1981EJ42, 1992 DC8, 1992DC8, 52257, J81E42J, J92D08C

All data for this body: [vot]

MPC data
Name (number) 1981 EJ42 (52257)
a 3.18210
e 0.10807
i / sin(i) 11.2825 / 0.19565
q 2.83822
Q 3.52599
ω 349.3614
Node 183.6088
m 305.8053
n 0.1736
Epoch 2460800.5
nobs 918
nopp 23
Years observed 1981-2025
rms 0.84
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.176
ep 0.147
sin(ip) 0.193
G 0.150
H 14.930
Mass
D 7.42 0.191
pV 0.035 0.0044
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 5.432
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1765 0.1466 0.1931 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
7.42 0.191 0.191 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.035 0.0044 0.0044 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
14.93 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
V X 0.0101 0.1110 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S 0.865 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S X 0.0403 0.1110 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X X 0.0753 0.1110 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X X 0.1583 0.1110 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT