Menu

U Oph

Observable Variable Star Excellent (66/100)

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

HIP 84500 VariableStar Ophiuchus (Oph) Visible Level 2 Small telescope (4") - Monitor brightness changes
Star Map
Add to List Add to Plan Back to Catalog

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 Ophiuchus (Oph)
HR 6414
HIP 84500
Variable ID U Oph
Double Cat 10428

Visibility

Set a location in User Settings to see visibility data.

Light Curve

Comparison Stars

Nearby stable stars for estimating brightness (AAVSO)

Loading comparison stars…

Size Comparison

Querying VizieR for stellar data…

Compare Stars

Stellar Lifecycle

Spectral Classification

Hertzsprung-Russell Diagram

Loading HR diagram…

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.

Light Travel Time Machine

Relativistic Travel

Survey Image

Loading survey image…

}