R Aur
Excellent (70/100)
HR 1707
VariableStar
Aur
Visible
Level 2
Small telescope (4") - Monitor brightness changes
Physical Properties
Magnitude
6.50
Range
6.70 - 13.90
Period
458 days
Variable Type
Mira (Long-period Pulsating)
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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Light Curve
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 Fusion
Stellar Notes
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.
Binary. Component B, 9.50V, +0.47(B-V), +0.09(U-B), F4IV.
Probable SiO maser emission.
Survey Image
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