Pi Cap
Observable Double Star
Good (54/100)
Sep: 3.5", Companion: mag 8.5
HIP 100881; Pi Cap; 10 Cap
DoubleStar
Cap
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
5.25
Spectral Type
B8II-III
Star Color
Blue-white
(B-V -0.07)
Position & Identifiers
RA
20h 27m 19.2s
Dec
-18° 12' 42.0"
Constellation
Cap
HR
7814
HIP
100881
Bayer
Pi
Flamsteed
10 Cap
Double Cat
13860
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
3.5″
Companion Mag
8.5
Position Angle
148°
Star Colors
A: Blue-white
B: Yellow-white
Discoverer
BU 60
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 3.5″ · PA: 148° · 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
AB CPM.
Survey Image
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