1998 OA9

1998OA9, 1997 GF4, 1997GF4, 2001 MO24, 2001MO24, 55971, J97G04F, J98O09A, K01M24O

All data for this body: [vot]

MPC data
Name (number) 1998 OA9 (55971)
a 2.13138
e 0.18664
i / sin(i) 1.9181 / 0.03347
q 1.73358
Q 2.52917
ω 112.0934
Node 231.5495
m 196.5273
n 0.3167
Epoch 2460800.5
nobs 1519
nopp 20
Years observed 1997-2025
rms 0.78
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.132
ep 0.104
sin(ip) 0.044
G 0.150
H 16.320
Mass
D 1.62 0.455
pV 0.153 0.0730
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 7.696
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.1318 0.1043 0.0445 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
1.62 0.455 0.455 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.153 0.0730 0.0730 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
16.32 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 0.399 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S S 0.1535 0.6630 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.7302 0.6630 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT