Tau Her
HIP 79992; Tau Her; 22 Her
DoubleStar
Her
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
3.89
Spectral Type
B5V
Star Color
Blue-white
(B-V -0.15)
Distance
307.4 ly
Position & Identifiers
RA
16h 19m 44.4s
Dec
+46° 18' 48.0"
Constellation
Her
HR
6092
HIP
79992
Bayer
Tau
Flamsteed
22 Her
Double Cat
10010
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Visibility
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Multiple Star System
Separation
6.7″
Companion Mag
14.6
Position Angle
150°
Star Colors
A: Blue-white
Discoverer
BU 1198
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 6.7″ · PA: 150° · 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
3.85 - 3.90V.
ADS 10010AB, 6700y.
Survey Image
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