Astronomical Applications Department, U.S. Naval Observatory pm AAS poster Page 14
-40
-20
0
20
WDS-TYC Proper Motion (mas/yr)
0
10
20
30
40
N
u
mb
er o
f
S
t
ars
WDS
-
TYC Relative Proper Motions (B
-
A)
Right Ascension
Declination
RMS (RA) = 4.29 mas/yr
RMS (Dec) = 3.65 mas/yr
