1999 AS21

1999AS21, 1991 VN6, 1991VN6, 35680, J91V06N, J99A21S

All data for this body: [vot]

MPC data
Name (number) 1999 AS21 (35680)
a 2.19753
e 0.05497
i / sin(i) 6.5880 / 0.11473
q 2.07674
Q 2.31832
ω 296.3763
Node 135.1990
m 81.1407
n 0.3026
Epoch 2460800.5
nobs 2692
nopp 19
Years observed 1991-2025
rms 0.74
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.198
ep 0.107
sin(ip) 0.118
G 0.150
H 15.400
Mass
D 1.94 0.531
pV 0.355 0.1901
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 9.536
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.1979 0.1072 0.1184 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
1.94 0.531 0.531 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.355 0.1901 0.1901 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
15.40 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 0.78 Bus VIS Carvano 2010A&A...510A..43C PHOT
S S 0.9960 0.9960 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT