HIP 42540
HIP 42540
DoubleStar
Vel
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.20
Spectral Type
B9V
Star Color
Blue-white
(B-V -0.01)
Position & Identifiers
RA
08h 40m 19.3s
Dec
-40° 15' 51.0"
Constellation
Vel
HR
3439
HIP
42540
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Visibility
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Multiple Star System
Separation
4.6″
Companion Mag
9.1
Position Angle
68°
Star Colors
A: Blue-white
B: Yellow
Discoverer
COO 74
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 4.6″ · PA: 68° · 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
Companion A2V.
Survey Image
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