Nu Cephei — Star in Cepheus
Observe
1Physical Properties
Magnitude
4.29
Range
4.25 - 4.35
Period
90 days
Variable Type
ACYG
Spectral Type
A2Ia
supergiant
Star Color
Yellow
(B-V 0.52)
Distance
251 ly
2Position & Identifiers
RA
21h 45m 26.9s
Dec
+61° 07' 15.0"
Constellation
Cepheus
(Cep)
HR
8334
HIP
107418
HD
207260
SAO
19624
Bayer
Nu
Flamsteed
10 Cep
Variable ID
Nu Cep
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
Jul – Sep
(peak: Aug)
5Survey Image
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Explore
7
Size Comparison
Querying VizieR for stellar data…
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 4.25 - 4.35V, 7.6:d.
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.
NGC 7160
Rich open cluster
Open Cluster
mag 6.1
1.8°
Cepheus
Mu Cep
Cool red giant
Star
mag 4.08
2.4°
Cepheus
19 Cep
Hot blue O-type star
Star
mag 5.11
2.6°
Cepheus
VV Cep
Cool red giant
Star
mag 4.91
2.8°
Cepheus
Delta Cep
Pulsating variable, period 5.4d
Variable Star
mag 3.75
6.1°
Cepheus
Iris Nebula
NGC 7023
Reflection nebula around a bright star
Reflection Nebula
mag 6.8
8.5°
Cepheus
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