Menu

7129 C — Unknown in Cepheus

Magnitude 12.0m Unknown Cepheus (Cep) Visible
Star Map
+ List + Plan Star Hop

Observe

1Properties

Magnitude 12.0
Angular Size 8 arcmin
!, cF, pL, gbM ***

Position & Identifiers

RA 21h 41m 18.0s
Dec +66° 05' 60.0"
Constellation Cepheus (Cep)
Catalog 7129 C

2How easy to spot?

Sign in and configure your equipment and default location to see a personalized row.
Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. V. hard+ V. hard Imp.
150mm Newt. Medium Hard+ Hard
C8 203mm Medium Medium Hard+
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

Medium on Seestar S50

3Visibility

Set a location in User Settings to see visibility data.

Best season Jul – Sep (peak: Aug)

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 7142
Easy
Open cluster
Open Cluster mag 9.3 0.5° Cepheus
Kurhah
HIP 108917; Xi Cephei; 17 Cephei
Easy
Easy double, sep 8.2″
Double Star mag 4.29 2.8° Cepheus
T Cep
Medium
Mira-type variable, range 5.2–11.3
Variable Star mag 7.33 3.9° Cepheus
Show on Map

Explore Nightbase

Related knowledge, tools, and stories — no observation planning required.

Cepheus
Mythology, bright stars, and deep-sky highlights.
Constellation
Mars
Polar caps, dust storms, and observing its oppositions.
Deep dive
Optics Simulator
See how focal length and eyepiece choice shape the view.
Tool
}