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IC 1340

Set a site to see tonight's sky

When IC 1340 is up, how long it stays usable and when it is in season all depend on where you observe from. Set your site and this page adds tonight's answer and its year.

Set it on Tonight

The science

What you are looking at

In one sentence

Debris from an exploded star, still expanding and ionised by its own shock front.

Class explainer for supernova remnant (catalogue type).

The facts

IC 1340 is a supernova remnant in Cygnus. SIMBAD gives no distance for it, so its true size and light-travel time can't be worked out here. On the sky it spans 25′ — 81% of the full Moon's width.

Sources: AstroBrain catalogue.

For scale

Angular size, as it would sit on your sky.

The same patch of sky in visible light

Sky image
Observatory photos and open-licence sky surveys.
Credits on each image.

Neighbours in the sky

Sky maths: apparent positions with refraction, one-minute steps; usable = full astronomical dark, at least 30° up and clear of your skyline. Survey images: CDS, Strasbourg (DSS2 and other surveys). Science: SIMBAD. The hours, heights and Moon on this page use no weather forecast; the rank is this target’s place in the Targets list, whose score also counts the cloud forecast when there is one.

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IC 1340

Set a site to see tonight's sky

When IC 1340 is up, how long it stays usable and when it is in season all depend on where you observe from. Set your site and this page adds tonight's answer and its year.

Set it on Tonight

The science

What you are looking at

In one sentence

Debris from an exploded star, still expanding and ionised by its own shock front.

Class explainer for supernova remnant (catalogue type).

The facts

IC 1340 is a supernova remnant in Cygnus. SIMBAD gives no distance for it, so its true size and light-travel time can't be worked out here. On the sky it spans 25′ — 81% of the full Moon's width.

Sources: AstroBrain catalogue.

For scale

Angular size, as it would sit on your sky.

The same patch of sky in visible light

Sky image
Observatory photos and open-licence sky surveys.
Credits on each image.

Neighbours in the sky

Sky maths: apparent positions with refraction, one-minute steps; usable = full astronomical dark, at least 30° up and clear of your skyline. Survey images: CDS, Strasbourg (DSS2 and other surveys). Science: SIMBAD. The hours, heights and Moon on this page use no weather forecast; the rank is this target’s place in the Targets list, whose score also counts the cloud forecast when there is one.

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