Nu Cygni — Double Star in Cygnus
Observe
1Physical Properties
Magnitude
3.94
Spectral Type
A0IIIn
bright giant
Star Color
White
(B-V 0.02)
Distance
374 ly
2Position & Identifiers
RA
20h 57m 10.4s
Dec
+41° 10' 02.0"
Constellation
Cygnus
(Cyg)
HR
8028
HIP
103413
HD
199629
SAO
50274
Bayer
Nu
Flamsteed
58 Cyg
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 | Easy | 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
Jun – Aug
(peak: Jul)
5Multiple Star System
Separation
0.1″
Companion Mag
6.4
Position Angle
176°
Star Colors
A: White
Discoverer
HDS2986
Explore
7
Size Comparison
Querying VizieR for stellar data…
8
Compare Stars
9
Spectral Classification
10
Hertzsprung-Russell Diagram
Loading HR diagram…
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
15
Light Travel Time Machine
16
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.
61 Cyg
Easy double, sep 32.1″
Double Star
mag 5.21
3.1°
Cygnus
North America nebula
NGC 7000
Emission nebula — try an OIII filter
Emission Nebula
mag 4.00
3.2°
Cygnus
NGC 7044
Open cluster
Open Cluster
mag 11.0
3.3°
Cygnus
Deneb
HIP 102098; Alpha Cygni; 50 Cygni
Bright naked-eye star, mag 1.2
Double Star
mag 1.25
5.0°
Cygnus
60 Cyg
Hot blue O-type star
Double Star
mag 5.37
5.0°
Cygnus
X Cyg
Pulsating variable, period 16.4d
Variable Star
mag 6.47
6.2°
Cygnus
Explore Nightbase
Related knowledge, tools, and stories — no observation planning required.
Double Stars — A Guide for Observers
Two suns where one appeared — how to find, split, and appreciate the night sky's finest pairs. From Albireo's gold-and-blue to the Sirius B challenge.
Article
Cygnus
Mythology, bright stars, and deep-sky highlights.
Constellation
Jupiter
The Great Red Spot, cloud belts, and the Galilean moons.
Deep dive
