9 Equulei — Star in Equuleus
Observe
1Physical Properties
Magnitude
5.82
Spectral Type
M2IIIa
bright giant
Star Color
Red
(B-V 1.66)
2Position & Identifiers
RA
21h 21m 04.8s
Dec
+07° 21' 16.0"
Constellation
Equuleus
(Equ)
HR
8163
HIP
105413
HD
203291
SAO
126719
Flamsteed
9 Equ
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3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Hard+ | Hard | V. 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
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Best season
Jul – Sep
(peak: Aug)
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
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
Equuleus
Mythology, bright stars, and deep-sky highlights.
Constellation
