Chi Cyg
Observable Variable Star
Excellent (70/100)
Range: 3.3 - 14.2, Period: 408.0d, Type: M
HIP 97629; Chi Cyg
VariableStar
Cyg
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
4.23
Range
3.3 - 14.2
Period
408.000 days
Variable Type
Mira (Long-period Pulsating)
Spectral Type
S6+/1e
Star Color
Red
(B-V 1.82)
Distance
271.8 ly
Position & Identifiers
RA
19h 50m 33.9s
Dec
+32° 54' 51.0"
Constellation
Cyg
HR
7564
HIP
97629
Bayer
Chi
Variable ID
Chi Cyg
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Light Curve
Comparison Stars for Chi Cyg (3.3–14.2)
Nearby stable stars for estimating brightness (AAVSO)
Loading comparison stars…
Multiple Star System
Separation
154.2″
Companion Mag
11.8
Companion Sp
/1e
Position Angle
255°
Star Colors
A: Red
Discoverer
BLL 42
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 154.2″ · PA: 255° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
Querying VizieR for stellar data…
Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
Loading HR diagram…
Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
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.
Survey Image
Loading survey image…