R Aqr
Excellent (74/100)
HIP 117054
VariableStar
Aquarius
(Aqr)
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
6.36
Range
5.2 - 12.4
Period
387 days
Variable Type
Mira (Long-period Pulsating)
Spectral Type
M7IIIpe
Star Color
Red
(B-V 1.58)
Position & Identifiers
RA
23h 43m 49.5s
Dec
-15° 17' 04.0"
Constellation
Aquarius
(Aqr)
HR
8992
HIP
117054
Variable ID
R Aqr
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Light Curve
Comparison Stars for R Aqr (5.8–12.4)
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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
M 5.8 - 12.4v, 386.96d. Secular period change, and oscillations in 24y period, also in RV. Variable radio emission | and SiO maser. May be a symbiotic star embedded in expanding gaseous nebula. Dust cloud associated with red component. | Companion B2ep may be an accretion white dwarf. Merrill in 1935 and Payne-Gaposhkin in 1946 analyzed the composite | light curve of R Aqr and its companion, concluding that the companion varies from about 8 to 12p, perhaps by even 5m.
Strong emission of He 10830 and FeXIII 10747. Spectrum varies M5e-M8.5e + pec.
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