Cassiopeia A

At a glance

Type

Supernova remnant

Right ascension

23h 23m 25.9s

Declination

+58° 48′

Angular size

5x1.1′

Catalogue

G111.7-02.1

Also catalogued as

G111.7-02.1, G111.7-02.1, G111.7-02.1

The outline on your card

The brightest radio remnant is a clumpy shell of fast-moving filaments.

Outline class

Filament

Axis ratio

0.22 : 1

Central source

No central source

Surface brightness

High

Recorded structure

Filaments · Jets · Knots

The card front carries no text by design: the glyph is drawn from this object's own silhouette, so the outline is the only clue you get until you scan it.

What did you just see?

Editorial description pending.

Find it in the sky

Observation guide pending.

Go deeper

Story pending.