1981 UN22

1981UN22, 16396, 1966 CQ, 1966CQ, 1986 ET4, 1986ET4, 1989 AD2, 1989AD2, 1999 CT83, 1999CT83, J66C00Q, J81U22N, J86E04T, J89A02D, J99C83T

All data for this body: [vot]

MPC data
Name (number) 1981 UN22 (16396)
a 2.22268
e 0.09520
i / sin(i) 2.7050 / 0.04720
q 2.01109
Q 2.43428
ω 34.8142
Node 113.2837
m 314.0645
n 0.2974
Epoch 2460800.5
nobs 3684
nopp 24
Years observed 1966-2025
rms 0.65
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.222
ep 0.148
sin(ip) 0.039
G 0.150
H 14.820
Mass
D 2.61 0.542
pV 0.341 0.1829
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 13.120
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.2222 0.1481 0.0388 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.61 0.542 0.542 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.341 0.1829 0.1829 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
14.82 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 0.44 Bus VIS Carvano 2010A&A...510A..43C PHOT
S 0.913 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S S 0.7936 0.7936 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT