Theta Cru
HIP 58867; Theta2 Cru
HIP 58867; Theta2 Cru
DoubleStar
Cru
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
4.72
Variable Type
Beta Cephei (Pulsating)
Spectral Type
B2IV
Star Color
Blue-white
(B-V -0.08)
Position & Identifiers
RA
12h 04m 19.2s
Dec
-63° 09' 56.0"
Constellation
Cru
HR
4603
HIP
58867
Bayer
Theta2
Variable ID
The2 Cru
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Visibility
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Multiple Star System
Separation
5.8″
Companion Mag
16.3
Position Angle
130°
Star Colors
A: Blue-white
Discoverer
SHT 43
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 5.8″ · PA: 130° · 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 4.70 - 4.74V, 0.0889d. See HR 4573.
3.4280d, K 51.3k/s, V0 +16.1k/s, asini 2.42.
Sco-Cen assoc.; doubtful member of the Sco-Cen cluster.
Also classified B3IV.
Survey Image
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