4 Cen
Observable Double Star
Excellent (60/100)
Sep: 14.8", Companion: mag 8.5
HIP 67786; 4 Cen
DoubleStar
Cen
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.73
Spectral Type
B4IV
Star Color
Blue-white
(B-V -0.14)
Position & Identifiers
RA
13h 53m 12.5s
Dec
-31° 55' 40.0"
Constellation
Cen
HR
5221
HIP
67786
Flamsteed
4 Cen
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Visibility
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Multiple Star System
Separation
14.8″
Companion Mag
8.5
Position Angle
185°
Star Colors
A: Blue-white
B: Yellow
Discoverer
H N 51
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 14.8″ · PA: 185° · 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
Visual companion, 8.35V, +0.36(B-V), +0.12(U-B), A3Vm, vsini 71k/s.
6.927d, K 21.4k/s, V0 +5.2k/s, asini 1.98.
Sco-Cen assoc.; certain member of the Sco-Cen cluster; upper Cen group of Sco-Cen assoc.
Visual companion +9k/s.
Survey Image
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