3 Cen
Observable Double Star
Excellent (65/100)
Sep: 7.8", Companion: mag 6.0
HIP 67669; 3 Cen
DoubleStar
Cen
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.56
Spectral Type
B5IIIp
Star Color
Blue-white
(B-V -0.13)
Distance
191.9 ly
Position & Identifiers
RA
13h 51m 49.6s
Dec
-32° 59' 40.0"
Constellation
Cen
HR
5210
HIP
67669
Flamsteed
3 Cen
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Visibility
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Multiple Star System
Separation
7.8″
Companion Mag
6.0
Companion Sp
B8V
Position Angle
105°
Star Colors
A: Blue-white
B: Blue-white
Discoverer
H 3 101
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 7.8″ · PA: 105° · 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
Mag. for combined light with HR 5211, 4.32V. Probably not binary.
Sco-Cen cluster; Sco-Cen stream; member of the local association (Pleiades group); upper Cen group of Sco-Cen assoc.; | member of Pleiades group.
Strong phosphorus. Abnormally weak helium. 3 Cen A shows excess of phosphorus by factor of 100, krypton by 1000, gallium | by 10,000, and deficiencies of sulphur and helium.
Survey Image
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