V640 Her
HIP 85302
DoubleStar
Her
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
5.98
Variable Type
Slow Irregular Variable
Spectral Type
M4IIIab
Star Color
Red
(B-V 1.62)
Position & Identifiers
RA
17h 25m 54.4s
Dec
+16° 55' 03.0"
Constellation
Her
HR
6495
HIP
85302
Variable ID
V640 Her
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Visibility
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Multiple Star System
Components
3
Component IDs
AC
Separation
8.5″
Companion Mag
14.9
Position Angle
216°
Star Colors
A: Red
Discoverer
KUI 81
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 8.5″ · PA: 216° · 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
Lb 5.98 - 6.21V.
Survey Image
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