S Cephei — Variable Star in Cepheus
Excellent (70/100)
Observe
1Physical Properties
Magnitude
7.40
Range
6.3 - 12.5
Period
487 days
Variable Type
Mira (Long-period Pulsating)
Spectral Type
C
Star Color
Deep ruby red
(B-V 3.00)
2Position & Identifiers
RA
21h 35m 13.0s
Dec
+78° 37' 28.0"
Constellation
Cepheus
(Cep)
HR
9117
HIP
106583
Variable ID
S Cep
Querying VizieR catalog...
3How easy to follow?
Magnitude
6.3 – 12.5 mag
Amplitude
6.2 mag
Period
487 d
Type
M
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Imp. | Imp. | Imp. |
| 50 mm finder 50mm finder | Imp. | Imp. | Imp. |
| 150 mm telescope 150mm scope | Hard+ | Hard | V. hard+ |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
To reach "Medium" at Bortle 3, you'd need at least a 180 mm reflector.
4Visibility
Set a location in User Settings to see visibility data.
Best season
Jul – Sep
(peak: Aug)
5Survey Image
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6Light Curve
7Comparison Stars for S Cep (6.3–12.5)
Nearby stable stars for estimating brightness (AAVSO)
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Explore
8
Size Comparison
Querying VizieR for stellar data…
9
Compare Stars
10
Spectral Classification
11
Hertzsprung-Russell Diagram
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12
Stellar Lifecycle
13
Blackbody Spectrum
14
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
15
Stellar Fusion
Discover
16Stellar Notes
Carbon star; Period 487d
Carbon star
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
Cepheus
Mythology, bright stars, and deep-sky highlights.
Constellation
