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HIP 30840

Observable Double Star Fair (24/100)

Sep: 1.2", Companion: mag 7.6

HIP 30840 DoubleStar Canis Major (CMa) Visible Level 5 Expert level - Requires steady seeing
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Physical Properties

Magnitude 5.74
Spectral Type B4Vnpe
Star Color Blue (B-V -0.17)
Distance 544 ly

Position & Identifiers

RA 06h 28m 39.2s
Dec -32° 22' 16.0"
Constellation Canis Major (CMa)
HR 2364
HIP 30840
Variable ID Var

Visibility

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Multiple Star System

Separation 1.2″
Companion Mag 7.6
Position Angle 42°
Star Colors A: Blue B: White
Discoverer BU 753

Eyepiece View

80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 42° A (5.7) B (7.6)

Sep: 1.2″ · PA: 42° · N up, E left

Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″

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Stellar Notes

Amp. 0.055b.
Shell star.

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