R Aur

Observable Variable Star Good (57/100)

Range: 6.7 - 13.7, Period: 457.6d

HR 1707 VariableStar Aur Visible Level 2 Small telescope (4") - Monitor brightness changes

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Physical Properties

Magnitude 6.50

Spectral Type M7IIIe

Star Color Red (B-V 1.66)

Position & Identifiers

RA 05h 17m 17.8s

Dec +53° 35' 10.0"

Constellation Aur

HR 1707

Variable ID R Aur

Double Cat 3845

Visibility

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Comparison Stars for R Aur (6.7–13.7)

Nearby stable stars for estimating brightness (AAVSO)

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Multiple Star System

Separation 45.0″

Companion Mag 10.1

Star Colors A: Red

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

ADS 3845A, M 6.7 - 13.7v, 457.64d, period changes; 10.18 - 13.12V, -0.06 to -0.43(U-B). Cycle of 64.5d also possible.

Double Star

Binary. Component B, 9.50V, +0.47(B-V), +0.09(U-B), F4IV.

Spectral

Probable SiO maser emission.

Survey Image

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