4 Her
HIP 77986; 4 Her
Star
Her
Visible
Level 2
Small telescope (4")
Physical Properties
Magnitude
5.75
Spectral Type
B9pe
Star Color
Blue-white
(B-V -0.11)
Position & Identifiers
RA
15h 55m 30.6s
Dec
+42° 33' 58.0"
Constellation
Her
HR
5938
HIP
77986
Flamsteed
4 Her
Variable ID
Var?
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Visibility
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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
Spectrum var. Balmer emission and metallic absorption vary in period about 30 yrs; H alpha profile varies in period | of =<1 min. A potassium flare observed June 21, 1965. Probable mass-transfer between components.
46.0227d, K 12.0k/s, V0 -19.3k/s, asini 7.17. RV period constant over 40 yrs. Shell-line RV also 46.023d.
Shell star. Also classified B8V.
Survey Image
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