Hardersen

08140, 1974 SM4, 1974SM4, 1979 YG5, 1979YG5, 1981 EO15, 1981EO15, J74S04M, J79Y05G, J81E15O

All data for this body: [vot]

MPC data
Name (number) Hardersen (8140)
a 2.73467
e 0.07148
i / sin(i) 6.8010 / 0.11842
q 2.53920
Q 2.93013
ω 194.3733
Node 220.5911
m 37.1412
n 0.2179
Epoch 2460800.5
nobs 5059
nopp 28
Years observed 1974-2025
rms 0.64
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.733
ep 0.053
sin(ip) 0.130
G 0.150
H 13.490
Mass
D 8.15 0.087
pV 0.080 0.0199
Value
Rotational Period 18.417
Period quality 2
Spectral Class S
Spectral Class Score 1.000
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.7334 0.0535 0.1303 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
8.15 0.087 0.087 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.080 0.0199 0.0199 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
13.49 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
18.4169 2 Sidereal Durech 2023A&A...675A..24D Model
18.41695 2 Sidereal Martikainen 2021A&A...649A..98M Model
18.4172 2 Sidereal Durech 2018A&A...617A..57D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
S S None None Movis NIR Popescu 2018A&A...617A..12P PHOT
V V 0.0762 0.0762 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT