Upsilon Aur
HIP 27639; Upsilon Aur; 31 Aur
Star
Aur
Visible
Level 1
Naked eye / Binoculars
Physical Properties
Magnitude
4.74
Range
4.71 - 4.75
Variable Type
Slow Irregular Variable
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
Querying VizieR catalog...
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 Fusion
Stellar Notes
Amp. 0.1V. Cycles 35-36d in 1970-1 not confirmed in other seasons.
Survey Image
Loading survey image…