Dabih
HIP 100345; Beta Cap; 9 Cap
Observable Double Star
Good (49/100)
Sep: 205.2", Companion: mag 6.1
HIP 100345; Beta Cap; 9 Cap
DoubleStar
Cap
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
3.08
Spectral Type
K0 :II: + A5:N
Star Color
Orange
(B-V 0.79)
Distance
326.2 ly
Position & Identifiers
RA
20h 21m 00.7s
Dec
-14° 46' 53.0"
Constellation
Cap
HR
7776
HIP
100345
Bayer
Beta
Flamsteed
9 Cap
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Visibility
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Multiple Star System
Components
8
Component IDs
*
Separation
205.2″
Companion Mag
6.1
Companion Sp
A0
Position Angle
266°
Star Colors
A: Orange
B: Blue-white
Discoverer
STFA 52
Eyepiece View
32x
Dawes: 1.9″
TFOV: 1.6°
Realistic = true angular size
Sep: 205.2″ · PA: 266° · 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
Complex system with HR 7775, q.v. Component B, vsini 97k/s. Occultations indicate component A is multiple system: 4.0, | 4.3v sep. 0.0002", 4.8v at 0.022" and 6.7v at 0.0001". A also suspected astrometric binary, 3.07 F8V. Possibly also | two faint 13v components at 112" discovered by John Herschel.
HR 7776-7775 = AxBC. 1374.126d, K 21.9k/s, V0 -18.9k/s, msin3i 3.75, asini 376. Alternate orbit 1374.23d, | K 22.44k/s, V0 -18.95k/s, msin3i 3.63, asini 382.5. Might be eclipsing. vsini of sceondary 115k/s?
Also classified G0III + B8V, K0II-IIIp + A0, B8V + K0II-III, or G8II + A0V:.
Dabih. Beta1 = Dabih Major; Beta2 = Dabih Minor.
Occultation diam. = 0.00305 - 0.00317". Diam. primary 0.0033".
Survey Image
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