Iota Arae — Star in Ara
Observe
1Physical Properties
Magnitude
5.25
Range
5.18 - 5.26
Period
13.4 hours
Variable Type
BE
Spectral Type
B2IIIne
bright giant
Star Color
Blue-white
(B-V -0.11)
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium | Hard+ | 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
May – Jul
(peak: Jun)
5Survey Image
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Explore
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
Discover
14Stellar Notes
Gamma Cas? 5.22 - 5.25V on time scale of fraction of a day.
Companion G5III, optical.
H alpha profile varies.
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.
Explore Nightbase
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1919 eclipse expedition confirming general relativity; first theory of stellar interiors; the Eddington limit
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Article
Ara
Mythology, bright stars, and deep-sky highlights.
Constellation
