R CrB
Observable Variable Star
Excellent (71/100)
Range: 5.61 - 15.1, Period: 48.6d, Type: RCB
HIP 77442
VariableStar
CrB
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
5.85
Range
5.61 - 15.1
Period
48.600 days
Variable Type
R Coronae Borealis (Carbon Star)
Spectral Type
G0Iep
Star Color
Orange
(B-V 0.77)
Distance
326.2 ly
Position & Identifiers
RA
15h 48m 34.4s
Dec
+28° 09' 24.0"
Constellation
CrB
HR
5880
HIP
77442
Variable ID
R CrB
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Visibility
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Light Curve
Comparison Stars for R CrB (5.8–14.8)
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
R CB 5.8 - 14.8v. The prototype star, discovered by Pigott in 1795.
IR excess.
Hydrogen deficient carbon star. At minimum, emission of CaII, NaI, ScII, TiII, SrII, and FeII. Spectra at 2 and 10 | micrometers indicate a thick dust shell either around R CrB or a companion.
Survey Image
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