Eta Herculis — Star in Hercules
Observe
1Physical Properties
Magnitude
3.53
Range
3.47 - 3.50
Variable Type
RS:
Spectral Type
G7III Fe-1
giant
Star Color
Orange
(B-V 0.92)
Distance
109 ly
2Position & Identifiers
RA
16h 42m 53.8s
Dec
+38° 55' 20.0"
Constellation
Hercules
(Her)
HR
6220
HIP
81833
HD
150997
SAO
65504
Bayer
Eta
Flamsteed
44 Her
Querying VizieR catalog...
3How easy to spot?
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| 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 |
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
Apr – Jun
(peak: May)
5Survey Image
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Explore
7
Size Comparison
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8
Compare Stars
9
Spectral Classification
10
Hertzsprung-Russell Diagram
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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
Companion questioned.
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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Article
Hercules
Mythology, bright stars, and deep-sky highlights.
Constellation
