1998 HA4

1998HA4, 37940, J98H04A

All data for this body: [vot]

MPC data
Name (number) 1998 HA4 (37940)
a 2.54501
e 0.15985
i / sin(i) 5.1846 / 0.09037
q 2.13818
Q 2.95184
ω 92.0858
Node 80.3681
m 264.6584
n 0.2428
Epoch 2460800.5
nobs 1671
nopp 20
Years observed 1992-2025
rms 0.78
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.542
ep 0.216
sin(ip) 0.080
G 0.150
H 15.410
Mass
D 2.18 0.351
pV 0.256 0.1023
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 4.307
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5415 0.2157 0.0798 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.18 0.351 0.351 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.256 0.1023 0.1023 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
15.41 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
S 0.38 Bus VIS Carvano 2010A&A...510A..43C PHOT
S S 0.5911 0.5911 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT