1 Per
Excellent (60/100)
HIP 8704; 1 Per
VariableStar
Per
Visible
Level 2
Small telescope (4") - Monitor brightness changes
Physical Properties
Magnitude
5.52
Range
5.49 - 5.85
Period
25.9 days
Variable Type
Eclipsing Binary (Algol-type)
Spectral Type
B1.5V
Star Color
Blue
(B-V -0.18)
Position & Identifiers
RA
01h 51m 59.3s
Dec
+55° 08' 51.0"
Constellation
Per
HR
533
HIP
8704
Flamsteed
1 Per
Variable ID
V436 Per
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Visibility
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Light Curve
Comparison Stars for 1 Per (5.5–5.8)
Nearby stable stars for estimating brightness (AAVSO)
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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 Fusion
Stellar Notes
E? 5.46 - 5.68y.
15.6d, K 10k/s, V0 -9k/s.
In neutral hydrogen region; Cas-Tau OB1.
Survey Image
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