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U Oph

Observable Variable Star Excellent (66/100)

Range: 5.84 - 6.56, Period: 1.7d, Type: EA/DM

HIP 84500 VariableStar Oph Visible Level 2 Small telescope (4") - Monitor brightness changes
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Physical Properties

Magnitude 5.88
Range 5.84 - 6.56
Period 40.3 hours
Variable Type Eclipsing Binary (Algol-type)
Spectral Type B5Vnn+B5V
Star Color White (B-V 0.06)
Distance 1,631 ly

Position & Identifiers

RA 17h 16m 31.7s
Dec +01° 12' 38.0"
Constellation Oph
HR 6414
HIP 84500
Variable ID U Oph
Double Cat 10428

Visibility

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Light Curve

Comparison Stars

Nearby stable stars for estimating brightness (AAVSO)

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Multiple Star System

Separation 20.7″
Companion Mag 13.0
Companion Sp B5V
Position Angle 357°
Star Colors A: White B: Blue
Discoverer HJ 854

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 10428A, EA 5.84 - 6.56V, 1.67734617d. Period changes. i 86.57d. Components 5.3 and 4.6 Suns.
B is dG0, optical.
ADS 10428A, B2, A0-2, 1.6773d, K 180.0k/s, V0 -10.8k/s, msin3i 5.00, asini 4.15. vsini secondary 92k/s.

Survey Image

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