1999 RY21

1999RY21, 2000 WD145, 2000WD145, 91448, J99R21Y, K00WE5D

All data for this body: [vot]

MPC data
Name (number) 1999 RY21 (91448)
a 2.57687
e 0.11206
i / sin(i) 10.5272 / 0.18270
q 2.28811
Q 2.86564
ω 108.6889
Node 8.5670
m 323.0101
n 0.2383
Epoch 2460800.5
nobs 2394
nopp 19
Years observed 1999-2025
rms 0.70
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.576
ep 0.138
sin(ip) 0.184
G 0.150
H 14.390
Mass
D 3.69 0.272
pV 0.226 0.0369
Value
Rotational Period
Period quality None
Spectral Class X
Spectral Class Score 2.046
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5759 0.1376 0.1836 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.28 0.341 0.341 Masiero 2011ApJ...741...68M NEATM
4.41 0.450 0.450 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.208 0.0390 0.0390 Masiero 2011ApJ...741...68M NEATM
0.376 0.1134 0.1134 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
14.39 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
X 0.341 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT