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Sigma Aql

HIP 96665; Sigma Aql; 44 Aql Star Aquila (Aql) Visible Level 2 Small telescope (4")
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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 Aquila (Aql)
HR 7474
HIP 96665
Bayer Sigma
Flamsteed 44 Aql
Variable ID Sig Aql
Double Cat 12737

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Spectral Classification

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Stellar Absorption Spectrum

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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.

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