Aladfar
HIP 94481; Eta Lyr; 20 Lyr
Observable Double Star
Good (53/100)
Sep: 28.4", Companion: mag 8.6
HIP 94481; Eta Lyr; 20 Lyr
DoubleStar
Lyr
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.39
Spectral Type
B2.5IV
Star Color
Blue-white
(B-V -0.15)
Distance
1630.8 ly
Position & Identifiers
RA
19h 13m 45.5s
Dec
+39° 08' 46.0"
Constellation
Lyr
HR
7298
HIP
94481
Bayer
Eta
Flamsteed
20 Lyr
Double Cat
12197
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
28.4″
Companion Mag
8.6
Position Angle
81°
Star Colors
A: Blue-white
Discoverer
STF2487
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 28.4″ · PA: 81° · 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
B is A0, optical.
56.4d. K 2.8, V0 -8.9, asini 1.841.
Aladfar.
Survey Image
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