Jellyfish Nebula
Supernova remnant

Jellyfish Nebula

IC 443 · Gemini
These photons are ~5,000 years old
LP
Date
2025-09-25
Location
36.3858° N, 28.0412° E
Integration
26m (155 × 10s)
Software
ZWO Seestar app
Notes
Plate solve
Centre RA
6h 17m 02.6s
Centre Dec
+22° 21′ 17″
Field
55.7′ × 98.8′
Pixel scale
2.38″/px
Orientation
62.6° E of N
Captured from · Ελλάς
36.3858° N, 28.0412° E · open map ↗

Where to find it

Interactive sky chart centred on 6 17 02.6 +22 21 17, with constellation stick figures overlaid. Locate shows the whole constellation with the target ringed; Field zooms to the close-up. Drag to pan, scroll to zoom, click any star to identify it. Imagery: DSS colour survey via CDS Aladin Lite. Constellation figures © Dominic Ford (GPLv3).

A supernova remnant with a distinctive shell of interlocking arcs, forming the appearance of a jellyfish. The remnant is interacting with a dense molecular cloud on its southern side, producing bright infrared emission. An excellent narrowband target particularly in SII and Hα.

Frequently asked questions

What kind of object is IC 443?
IC 443 is a supernova remnant.
Which constellation is IC 443 in?
IC 443 lies in the constellation Gemini.
How far away is IC 443?
The light in this image left IC 443 roughly ~5,000 years ago, so that is how far back in time you are seeing it.
What are the coordinates of IC 443?
IC 443 sits at right ascension 06h 17m 03s and declination +22° 21′ 17″ (J2000).
When is the best time to photograph IC 443?
IC 443 rides highest in the evening sky around December, reaching about 59° above the horizon from around 54°N.
What equipment was used to photograph IC 443?
This image of IC 443 was captured with ZWO Seestar S50 and ZWO Seestar S50 Camera.
How much exposure time went into this image?
This image of IC 443 represents 26m (155 × 10s) of total integration time.