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Delta Cir

HIP 74778; Delta Cir Star Circinus (Cir) Visible Level 2 Small telescope (4")
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Physical Properties

Magnitude 5.09
Range 5.04 - 5.20
Period 3.9 days
Variable Type Eclipsing Binary (Algol-type)
Spectral Type O8.5V
Star Color Blue-white (B-V -0.06)

Position & Identifiers

RA 15h 16m 56.7s
Dec -60° 57' 27.0"
Constellation Circinus (Cir)
HR 5664
HIP 74778
Bayer Delta

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Spectral Classification

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Stellar Notes

Component A of double, Ell?, amp. 0.08V.
CPM with the triple star HR 5661. Faint companion of HR 5664, G5V, probably optical.
3.9025d, K 158.3k/s, V0 +9.2k/s, asini 8.46.
Also classified O7.5III((f)).

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