Algedi
HIP 100064; Alpha2 Cap; 6 Cap
HIP 100064; Alpha2 Cap; 6 Cap
DoubleStar
Cap
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
3.57
Spectral Type
G8.5III-IV
Star Color
Orange
(B-V 0.94)
Distance
105.8 ly
Position & Identifiers
RA
20h 18m 03.3s
Dec
-12° 32' 41.0"
Constellation
Cap
HR
7754
HIP
100064
Bayer
Alpha2
Flamsteed
6 Cap
Double Cat
13645
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Visibility
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Multiple Star System
Components
9
Component IDs
*
Separation
377.7″
Companion Mag
11.1
Position Angle
190°
Star Colors
A: Orange
B: Orange
Eyepiece View
32x
Dawes: 1.9″
TFOV: 1.6°
Realistic = true angular size
Sep: 377.7″ · PA: 190° · 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
IDS notes Alpha1 Cap = HR 7747 (ADS 13632, four components) as one of five components of Alpha2 Cap = HR | 7754 = ADS 13645. Hence, we have recorded n = 9 for both. ADS 13645AB optical; BC 11.2, 11.5v, sep. 1.2" binary.
Secunda Giedi; Algiedi Secunda; Gredi; Algedi, with HR 7747.
Survey Image
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