Keesom

09686, 1953 SQ, 1953SQ, 1991 RL41, 1991RL41, 4604 P-L, 4604P-L, J53S00Q, J91R41L, PLS4604

All data for this body: [vot]

MPC data
Name (number) Keesom (9686)
a 2.27923
e 0.11434
i / sin(i) 2.3219 / 0.04051
q 2.01862
Q 2.53985
ω 305.2814
Node 27.6669
m 305.4640
n 0.2864
Epoch 2460800.5
nobs 2227
nopp 25
Years observed 1953-2025
rms 0.73
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.279
ep 0.070
sin(ip) 0.033
G 0.150
H 15.380
Mass
D 2.31 0.340
pV 0.251 0.1086
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 8.336
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.2791 0.0703 0.0326 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.31 0.340 0.340 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.251 0.1086 0.1086 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
15.38 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 DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
S 0.23 Bus VIS Carvano 2010A&A...510A..43C PHOT
S S 0.9794 0.9794 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X 0.300 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT