Kappa Cassiopeiae — Star in Cassiopeia
Observe
1Physical Properties
Magnitude
4.16
Range
4.12 - 4.21
Period
2.6 days
Variable Type
ACYG
Spectral Type
B1Ia
supergiant
Star Color
White
(B-V 0.14)
2Position & Identifiers
RA
00h 33m 00.0s
Dec
+62° 55' 54.0"
Constellation
Cassiopeia
(Cas)
HR
130
HIP
2599
HD
2905
SAO
11256
Bayer
Kappa
Flamsteed
15 Cas
Variable ID
Kap Cas
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium+ | Medium+ | 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
Aug – Oct
(peak: Sep)
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
Alpha Cyg, 4.22 - 4.30B, 0.09028d.
0.14035d, strongly modulated.
Cas OB14.
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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The HR diagram turns the night sky into a physics map: every named star has a spot, every spot tells you mass, age, and fate. A guide for amateur observers.
Article
Cassiopeia
Mythology, bright stars, and deep-sky highlights.
Constellation
