1999 WK9

1999WK9, 1998 JY2, 1998JY2, 41207, J98J02Y, J99W09K

All data for this body: [vot]

MPC data
Name (number) 1999 WK9 (41207)
a 2.55479
e 0.25274
i / sin(i) 8.2462 / 0.14343
q 1.90908
Q 3.20050
ω 197.4878
Node 118.6186
m 159.5115
n 0.2414
Epoch 2460800.5
nobs 1742
nopp 22
Years observed 1994-2025
rms 0.80
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.554
ep 0.218
sin(ip) 0.118
G 0.150
H 15.100
Mass
D 2.28 0.269
pV 0.408 0.0777
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 9.204
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5542 0.2176 0.1182 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.28 0.269 0.269 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.408 0.0777 0.0777 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
15.10 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
L S 0.3981 0.5220 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
S 0.71 Bus VIS Carvano 2010A&A...510A..43C PHOT
S S 0.9640 0.5220 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
V 0.688 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
X S 0.3657 0.5220 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT