V642 Her
HIP 85934
DoubleStar
Her
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
6.48
Variable Type
Semi-Regular Variable
Spectral Type
M4IIIa
Star Color
Red
(B-V 1.60)
Position & Identifiers
RA
17h 33m 42.8s
Dec
+14° 50' 30.0"
Constellation
Her
HR
6543
HIP
85934
Variable ID
V642 Her
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Visibility
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Multiple Star System
Separation
0.5″
Companion Mag
7.2
Position Angle
32°
Star Colors
A: Red
Discoverer
WSI 3
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.5″ · PA: 32° · N up, E left
Unresolved · 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
SRb 6.41 - 6.56V, about 12d.
Survey Image
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