R Cas
Showpiece (78/100)
HIP 118188
VariableStar
Cassiopeia
(Cas)
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
4.80
Range
4.7 - 13.5
Period
430 days
Variable Type
Mira (Long-period Pulsating)
Spectral Type
M7IIIe
Star Color
Deep ruby red
(B-V 1.83)
Position & Identifiers
RA
23h 58m 24.8s
Dec
+51° 23' 19.0"
Constellation
Cassiopeia
(Cas)
HR
9066
HIP
118188
Variable ID
R Cas
Double Cat
17135
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Visibility
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Light Curve
Comparison Stars for R Cas (4.7–13.5)
Nearby stable stars for estimating brightness (AAVSO)
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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 Fusion
Stellar Notes
ADS 17135A, M 4.7 - 13.5v, 430.46d. Variable SiO maser source, indicating shell-like structure. Single cycle 6.45 to | 11.25V, +1.31 to +2.66(B-V), -0.07 to +1.02(U-B).
Companions optical.
OH and H2O emission strong in infrared. IR spectra show water vapor. Variable M6e-M10e.
Survey Image
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