R Leo
Observable Variable Star
Excellent (69/100)
Range: 4.4 - 11.3, Period: 309.9d
HIP 48036
VariableStar
Leo
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
6.02
Spectral Type
M8IIIe
Star Color
Red
(B-V 1.30)
Distance
163.1 ly
Position & Identifiers
RA
09h 47m 33.5s
Dec
+11° 25' 44.0"
Constellation
Leo
HR
3882
HIP
48036
Variable ID
R Leo
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Visibility
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Comparison Stars for R Leo (4.4–11.3)
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 Notes
M 4.4 - 11.3v, 309.95d. Period varies from 307.4 to 317.8d. Discovered by Koch in 1782.
R-I corresponds to 7.52V, +1.41(B-V), +0.28(U-B).
Wolf 630 group.
SiO maser. H2O bands. Silicate emission. Also classified M6e-M9.5IIIe.
Speckle interferometer observations show abrupt variations in diameter as a function of wavelength, interpreted as due | to large opacity of TiO. 0.032" at 5400A to 0.054" at 7300A to 0.030" at 7400A. Occultation diam. = 0.067", the | largest measured angular diameter of any star other than the Sun.
Survey Image
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