Sigma Aql
HIP 96665; Sigma Aql; 44 Aql
Star
Aql
Visible
Level 2
Small telescope (4")
Physical Properties
Magnitude
5.17
Range
5.15 - 5.33
Period
46.8 hours
Variable Type
Eclipsing Binary (Algol-type)
Spectral Type
B3V+B3V
Star Color
White
(B-V 0.03)
Position & Identifiers
RA
19h 39m 11.6s
Dec
+05° 23' 52.0"
Constellation
Aql
HR
7474
HIP
96665
Bayer
Sigma
Flamsteed
44 Aql
Variable ID
Sig Aql
Double Cat
12737
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Visibility
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Light Curve
Multiple Star System
Components
3
Component IDs
AB
Separation
48.0″
Companion Mag
12.3
Companion Sp
B3V
Position Angle
327°
Star Colors
A: White
B: Blue
Discoverer
HJ 2886
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 Fusion
Stellar Notes
ADS 12737A, EB 5.18 - 5.36B, 1.95026827d. i 71.7d. Spectra vary in period 1.950271d.
B, 12v K0Ve at 48" optical. C, 12v at 130". Rotational velocity of A 123k/s, of B 142k/s.
ADS 12737A, 1.950271d, K 164.2k/s, V0 -4.5k/s, msin3i 5.84, asini 4.40. vsini of secondary 129k/s.
Survey Image
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