Theta Lyr
HIP 94713; Theta Lyr; 21 Lyr
DoubleStar
Lyra
(Lyr)
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.36
Spectral Type
K0+II
Star Color
Red
(B-V 1.26)
Distance
251 ly
Position & Identifiers
RA
19h 16m 22.1s
Dec
+38° 08' 01.0"
Constellation
Lyra
(Lyr)
HR
7314
HIP
94713
Bayer
Theta
Flamsteed
21 Lyr
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Visibility
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Multiple Star System B: optical
Components
3
Component IDs
AB
Separation
99.2″
Companion Mag
10.1
Companion Sp
K2
Position Angle
70°
Star Colors
A: Red
B: Orange
Discoverer
SHJ 292
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 99.2″ · PA: 70° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
Size Comparison
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Hertzsprung-Russell Diagram
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