Chi Cyg
Showpiece (80/100)
HIP 97629; Chi Cyg
VariableStar
Cygnus
(Cyg)
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
4.23
Range
3.3 - 14.2
Period
408 days
Variable Type
Mira (Long-period Pulsating)
Spectral Type
S6+/1e
Star Color
Deep ruby red
(B-V 1.82)
Distance
272 ly
Position & Identifiers
RA
19h 50m 33.9s
Dec
+32° 54' 51.0"
Constellation
Cygnus
(Cyg)
HR
7564
HIP
97629
Bayer
Chi
Variable ID
Chi Cyg
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Light Curve
Comparison Stars for Chi Cyg (3.3–14.2)
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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
Discovered by Kirch in 1686. M 3.3 - 14.2v. Period changes: 1686-1842, 405.88d; subsequently 408.05d. | Variable CO emission from circumstellar envelope and enhancement of shell at minimum light. Total visual absorption of | shell = 2 mag. Variable SiO maser source. Appreciable reddening at ascending light.
Probable SiO maser emission. Most intense infrared CO bands observed in any star to 1973. Technetium found in | spectrum. Also classified S6,2e-S10,4e.
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