FL Ser

HIP 74386 DoubleStar Ser Visible Level 6 Professional/Research - Requires steady seeing

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Physical Properties

Magnitude 5.89

Variable Type Slow Irregular Variable

Spectral Type M4IIIab

Star Color Red (B-V 1.53)

Distance 543.6 ly

Position & Identifiers

RA 15h 12m 04.3s

Dec +18° 58' 33.0"

Constellation Ser

HR 5654

HIP 74386

Variable ID FL Ser

Visibility

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Multiple Star System

Separation 0.5″

Companion Mag 8.9

Companion Sp K5

Position Angle 142°

Star Colors A: Red B: Red

Discoverer COU 189

Eyepiece View

Telescope Eyepiece

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

Sep: 0.5″ · PA: 142° · 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

Variable Star

Lb 5.79 - 6.02V.

Double Star

Resolved by speckle interferometry 1986.45, sep. 0.51".

Survey Image

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