Deneb Algedi
HIP 107556; Delta Cap; 49 Cap
Observable Variable Star
Excellent (62/100)
Range: 2.8 - 3.0, Period: 1.0d, Type: RS CVn
HIP 107556; Delta Cap; 49 Cap
VariableStar
Cap
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
2.87
Variable Type
RS CVn (Chromospherically Active)
Spectral Type
A5MF2 (IV)
Star Color
Yellow-white
(B-V 0.29)
Temperature
8519 K
Radius
203.0 R☉
Distance
38.7 ly
Position & Identifiers
RA
21h 47m 02.4s
Dec
-16° 07' 38.0"
Constellation
Cap
HR
8322
HIP
107556
Bayer
Delta
Flamsteed
49 Cap
Variable ID
Del Cap
Double Cat
15314
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Visibility
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Comparison Stars for Deneb Algedi (2.8–3.0)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Components
4
Separation
49.9″
Companion Mag
15.0
Position Angle
60°
Star Colors
A: Yellow-white
Discoverer
HJ 3056
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 49.9″ · PA: 60° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
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
EA (possibly RS CVn type) 2.83 - 3.05V, 1.0227789d. Form of light curve varies.
ADS 15314A. Component A is SB, 3.2, 5.2v, 0.0018"; B, 15.8v, 69"; C 12.7v, 120".
1.0228d, K 70.8k/s, V0 -0.2k/s, asini 0.996.
Delta Sct spectrum. Also classified Delta Del, A7mIII.
Deneb Algedi; Deneb Algiedi; Scheddi; Sheddi.
Survey Image
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