Epsilon Cap
HIP 106723; Epsilon Cap; 39 Cap
DoubleStar
Cap
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.68
Range
4.48 - 4.72
Variable Type
Gamma Cassiopeiae (Eruptive Be Star)
Spectral Type
B2.5Vpe
Star Color
Blue
(B-V -0.17)
Position & Identifiers
RA
21h 37m 04.8s
Dec
-19° 27' 58.0"
Constellation
Cap
HR
8260
HIP
106723
Bayer
Epsilon
Flamsteed
39 Cap
Variable ID
Eps Cap
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Multiple Star System
Components
3
Separation
65.8″
Companion Mag
10.1
Position Angle
46°
Star Colors
A: Blue
Discoverer
H 6 6
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 65.8″ · PA: 46° · 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 Fusion
Stellar Notes
Gamma Cas 4.44 - 4.72V. Polarization variable. Slight variation in H alpha line width.
Component A is SB, 5.0, 6.3v, 0.0047"; component B, 9.5v K1III-IV: at 68", physical, vsini =<54k/s.
Shell star. Shell spectrum resembles supergiant A-type with vsini 50k/s. Also classified B3IIIe.
Survey Image
Loading survey image…