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HIP 74750

Observable Double Star Fair (25/100)

Sep: 1.2", Companion: mag 8.6

HIP 74750 DoubleStar Cir Visible Level 5 Expert level - Requires steady seeing
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Physical Properties

Magnitude 5.73
Spectral Type B0.5Ve
Star Color Blue-white (B-V -0.08)

Position & Identifiers

RA 15h 16m 36.4s
Dec -60° 54' 14.0"
Constellation Cir
HR 5661
HIP 74750

Visibility

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Multiple Star System

Components 3
Component IDs AB
Separation 1.2″
Companion Mag 8.6
Position Angle 164°
Star Colors A: Blue-white B: Yellow-white
Discoverer B 1777

Eyepiece View

80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 164° A (5.7) B (8.6)

Sep: 1.2″ · PA: 164° · N up, E left

Unresolved · 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

Component C, A5V, optical. Component B, RV -16k/s. CPM with HR 5664.
Sco-Cen assoc.
H alpha variable.

Survey Image

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