Theta Aquilae — Star in Aquila
About Theta Aql
Description
Theta Aquilae is a blue-white giant of spectral type B9.5III at magnitude 3.23 in Aquila. Located about 287 light-years from Earth, it has a luminosity of roughly 255 times solar. It is a spectroscopic binary. Theta Aql lies in the tail region of the Eagle, south of Altair.
Observing Tips
Theta Aql lies south of Altair in the tail of Aquila. It is a white star in the summer Milky Way. Best observed June through November when Aquila is prominent in the evening sky.
History
Theta Aquilae has no widely used traditional name. Aquila is an ancient constellation associated with the eagle that carried Zeus's thunderbolts in Greek mythology.
Fun Facts
Aquila lies in the richest part of the summer Milky Way, and Theta Aql sits in a particularly star-rich region that is spectacular in binoculars.
Observe
1Physical Properties
2Position & Identifiers
3How easy to spot?
| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Easy | Easy | Medium+ |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 150 mm telescope 150mm scope | Easy | Easy | Easy |
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
5Survey Image
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Explore
7
Size Comparison
8
Compare Stars
9
Spectral Classification
10
Hertzsprung-Russell Diagram
11
Stellar Lifecycle
12
Blackbody Spectrum
13
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
14
Stellar Fusion
Discover
15Stellar Notes
16
Light Travel Time Machine
17
Relativistic Travel
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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