Delta Lyr
HIP 92791; Delta2 Lyr; 12 Lyr
HIP 92791; Delta2 Lyr; 12 Lyr
DoubleStar
Lyr
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.30
Variable Type
Semi-Regular Variable
Spectral Type
M4II
Star Color
Red
(B-V 1.68)
Position & Identifiers
RA
18h 54m 30.2s
Dec
+36° 53' 56.0"
Constellation
Lyr
HR
7139
HIP
92791
Bayer
Delta2
Flamsteed
12 Lyr
Variable ID
Del2 Lyr
Double Cat
11825
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
86.3″
Companion Mag
11.2
Companion Sp
B9/A0
Position Angle
349°
Star Colors
A: Red
B: Blue-white
Discoverer
ES 2028
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 86.3″ · PA: 349° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
SRc? 4.22 - 4.33V.
In Delta Lyr cluster in the Pleiades group.
Survey Image
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