Menu

Upsilon Aur

HIP 27639; Upsilon Aur; 31 Aur Star Aur Visible Level 1 Naked eye / Binoculars
Star Map Add to List Add to Plan
Back to Catalog

Physical Properties

Magnitude 4.74
Variable Type Eclipsing Binary (Algol-type)
Spectral Type M0+III-IIIbFe-0.5
Star Color Red (B-V 1.62)

Position & Identifiers

RA 05h 51m 02.4s
Dec +37° 18' 20.0"
Constellation Aur
HR 2011
HIP 27639
Bayer Upsilon
Flamsteed 31 Aur

Visibility

Set a location in User Settings to see visibility data.

Size Comparison

Querying VizieR for stellar data…

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 Notes

Amp. 0.1V. Cycles 35-36d in 1970-1 not confirmed in other seasons.

Survey Image

Loading survey image…