19 Cephei — Star in Cepheus
Observe
1Physical Properties
Magnitude
5.11
Spectral Type
O9.5Ib
supergiant
Star Color
White
(B-V 0.08)
2Position & Identifiers
RA
22h 05m 08.9s
Dec
+62° 16' 48.0"
Constellation
Cepheus
(Cep)
HR
8428
HIP
109017
HD
209975
SAO
19849
Flamsteed
19 Cep
Double Cat
15624
Querying VizieR catalog...
3How easy to spot?
Sign in
and configure your equipment and default location to see a personalized row.
| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium | Hard+ | 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
Set a location in User Settings to see visibility data.
Best season
Jul – Sep
(peak: Aug)
5Survey Image
Loading survey image…
Explore
6
Size Comparison
Querying VizieR for stellar data…
7
Compare Stars
8
Spectral Classification
9
Hertzsprung-Russell Diagram
Loading HR diagram…
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
Discover
14Stellar Notes
Companions optical: B, 11.6v at 20"; C 10.79V, +1.08(B-V), +0.75(U-B).
Cep OB2.
Also classified O9I.
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
1.4°
Cepheus
VV Cep
Cool red giant
Star
mag 4.91
1.7°
Cepheus
Kurhah
HIP 108917; Xi Cephei; 17 Cephei
Easy double, sep 8.2″
Double Star
mag 4.29
2.4°
Cepheus
Delta Cep
Pulsating variable, period 5.4d
Variable Star
mag 3.75
4.9°
Cepheus
Sh2-155
C9
Emission nebula — try an OIII filter
Emission Nebula
mag 7.7
6.1°
Cepheus
Explore Nightbase
Related knowledge, tools, and stories — no observation planning required.
Arthur Eddington
1919 eclipse expedition confirming general relativity; first theory of stellar interiors; the Eddington limit
Biography
Cepheus
Mythology, bright stars, and deep-sky highlights.
Constellation
The Hertzsprung-Russell Diagram — Reading Stars Like a Map
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
