FU CMa
Observable Variable Star
Good (48/100)
Range: 6.5 - 6.6, Period: 7.0d, Type: Gamma Cas
HIP 33721
VariableStar
CMa
Visible
Level 3
Medium telescope (6-8") - Monitor brightness changes
Physical Properties
Magnitude
6.53
Variable Type
Gamma Cassiopeiae (Eruptive Be Star)
Spectral Type
B2IV-Vne
Star Color
Blue
(B-V -0.17)
Position & Identifiers
RA
07h 00m 19.3s
Dec
-22° 07' 10.0"
Constellation
CMa
HR
2628
HIP
33721
Variable ID
FU CMa
Double Cat
5687
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Visibility
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Comparison Stars for FU CMa (6.5–6.6)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Components
5
Component IDs
AP
Separation
13.6″
Companion Mag
11.1
Position Angle
232°
Star Colors
A: Blue
Discoverer
SEE 74
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 13.6″ · PA: 232° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
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
Gamma Cas 6.48 - 6.60V. Time scale 7d.
Component X, K-type spectrum, optical.
Survey Image
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