Running No.: 219  
CNS designation: Gl 101
YPC: 504.00
LHS: 155
RA (2000): 02 31 27
Dec (2000): +57 22.8
RA (1950): 02 27 44
Dec (1950): +57 09.5
RA (1900): 02 24 03
Dec (1900): +56 56.0
µ(RA): 1.042 "/yr µ(Dec): .027 "/yr
Total Proper Motion: 1.042 "/yr 88.5°
V : 13.22
B-V: 1.52
V-Rc: 1.15
R-Ic: 1.49
Spectral Type: M3.5
Trig. Par.: 52.6 ± 2.3 mas 3 Obs. (good accord.)
Res. Par. (Trig. Par.): 52.6 ± 2.3 mas
Distance: 19.01 ± .83 pc
MV : 11.82
M Qual.: a
RV: + 3.4 km/s
RV Qual.: e
Space Velocity:
U: -064 km/s
V: -058 km/s
W: +037 km/s
Additional Designations: Ross 21
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Updated: 4 March 1998
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