Upsilon Aurigae — Star in Auriga
Observe
1Physical 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)
2Position & Identifiers
RA
05h 51m 02.4s
Dec
+37° 18' 20.0"
Constellation
Auriga
(Aur)
HR
2011
HIP
27639
HD
38944
SAO
58496
Bayer
Upsilon
Flamsteed
31 Aur
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium+ | Medium | Hard+ |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 150 mm telescope 150mm scope | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
Best season
Nov – Jan
(peak: Dec)
5Survey Image
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6
Size Comparison
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7
Compare Stars
8
Spectral Classification
9
Hertzsprung-Russell Diagram
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10
Stellar Lifecycle
11
Blackbody Spectrum
12
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
13
Stellar Fusion
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14Stellar Notes
Amp. 0.1V. Cycles 35-36d in 1970-1 not confirmed in other seasons.
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
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Article
Auriga
Mythology, bright stars, and deep-sky highlights.
Constellation
