1999 RJ21

1999RJ21, 40420, J99R21J

All data for this body: [vot]

MPC data
Name (number) 1999 RJ21 (40420)
a 2.59710
e 0.04076
i / sin(i) 13.3643 / 0.23114
q 2.49124
Q 2.70296
ω 157.7525
Node 165.8089
m 74.8453
n 0.2355
Epoch 2460800.5
nobs 2424
nopp 21
Years observed 1998-2024
rms 0.71
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.597
ep 0.017
sin(ip) 0.228
G 0.150
H 14.510
Mass
D 3.89 0.201
pV 0.244 0.0703
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 5.928
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5974 0.0165 0.2282 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.89 0.201 0.201 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.244 0.0703 0.0703 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
14.51 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 0.988 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT