IC443 Jellyfish Nebula in the Constellation of Gemini (Phil Swift)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: Gem A · IC 443 · The star Propus (ηGem)

IC443 Jellyfish Nebula in the Constellation of Gemini, Phil Swift

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IC443 Jellyfish Nebula in the Constellation of Gemini

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IC443 Jellyfish Nebula in the Constellation of Gemini

The Jellyfish Nebula is a galactic supernova remnant (SNR) in the constellation Gemini.

On the plane of the sky, it is located near the star Eta Geminorum.

Its distance is roughly 5,000 light years from Earth.

IC 443 may be the remains of a supernova that occurred 3,000 - 30,000 years ago.

The same supernova event likely created the neutron star CXOU J061705.3+222127, the collapsed remnant of the stellar core.

It is one of the best-studied cases of supernova remnants interacting with surrounding molecular clouds.

IC 443 is an extended source, having an angular diameter of 50 arcmin (by comparison, the full moon is 30 arcmin across).

At the estimated distance of 5,000 ly (1,500 parsec) from Earth, it has a physical size of roughly 70 light years (20 parsec).

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
Started	...
Astrometry.net job	4319175
PixInsight job	n/a
PixInsight queue size	n/a
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IC443 Jellyfish Nebula in the Constellation of Gemini

IC443 Jellyfish Nebula in the Constellation of Gemini

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Image Index:

Contribution Index (beta):

IC443 Jellyfish Nebula in the Constellation of Gemini

IC443 Jellyfish Nebula in the Constellation of Gemini

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