BU Cir
HIP 72121
DoubleStar
Cir
Visible
Level 1
Naked eye / Binoculars - Requires steady seeing
Physical Properties
Magnitude
6.10
Variable Type
Beta Cephei (Pulsating)
Spectral Type
B2III
Star Color
Blue-white
(B-V -0.06)
Position & Identifiers
RA
14h 45m 10.9s
Dec
-55° 36' 07.0"
Constellation
Cir
HR
5488
HIP
72121
Variable ID
BU Cir
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Visibility
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Multiple Star System
Separation
69.0″
Companion Mag
7.5
Position Angle
105°
Star Colors
A: Blue-white
B: Yellow-white
Discoverer
DUN 169
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 69.0″ · 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
Beta C, amp. 0.04u, 0.03y, 0.04V, 0.131d with possible secondary periods.
In Norma dark cloud.
Var. 0.135d, amp. about 18k/s.
Survey Image
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