1999 JY21

1999JY21, 1976 JB6, 1976JB6, 35785, J76J06B, J99J21Y

All data for this body: [vot]

MPC data
Name (number) 1999 JY21 (35785)
a 2.21383
e 0.06980
i / sin(i) 2.5359 / 0.04425
q 2.05931
Q 2.36836
ω 335.8846
Node 270.2094
m 297.5128
n 0.2992
Epoch 2460800.5
nobs 2223
nopp 21
Years observed 1976-2025
rms 0.72
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.214
ep 0.088
sin(ip) 0.053
G 0.150
H 15.370
Mass
D 2.43 0.380
pV 0.299 0.0980
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 9.590
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.2141 0.0878 0.0535 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.43 0.380 0.380 Masiero 2012ApJ...759L...8M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.299 0.0980 0.0980 Masiero 2012ApJ...759L...8M 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
15.37 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
A S 0.7236 0.6420 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
S 0.92 Bus VIS Carvano 2010A&A...510A..43C PHOT
S S 0.9584 0.6420 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT